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Merge branch 'master' of github.com:ClickHouse/ClickHouse into en-docs/CLICKHOUSEDOCS-121-addressToLine

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BayoNet 2019-11-20 15:50:47 +03:00
commit 7aee9567ef
96 changed files with 3596 additions and 898 deletions
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1
.gitmodules vendored
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@ -1,6 +1,7 @@
[submodule "contrib/poco"]
path = contrib/poco
url = https://github.com/ClickHouse-Extras/poco
branch = clickhouse
[submodule "contrib/zstd"]
path = contrib/zstd
url = https://github.com/facebook/zstd.git

18
CHANGELOG.md
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@ -128,7 +128,7 @@ Kuzmenkov](https://github.com/akuzm))
Zuikov](https://github.com/4ertus2))
* Optimize partial merge join. [#7070](https://github.com/ClickHouse/ClickHouse/pull/7070)
([Artem Zuikov](https://github.com/4ertus2))
* Do not use more then 98K of memory in uniqCombined functions.
* Do not use more than 98K of memory in uniqCombined functions.
[#7236](https://github.com/ClickHouse/ClickHouse/pull/7236),
[#7270](https://github.com/ClickHouse/ClickHouse/pull/7270) ([Azat
Khuzhin](https://github.com/azat))
@ -396,7 +396,7 @@ fix comments to make obvious that it may throw.
* Fix segfault with enabled `optimize_skip_unused_shards` and missing sharding key. [#6384](https://github.com/ClickHouse/ClickHouse/pull/6384) ([Anton Popov](https://github.com/CurtizJ))
* Fixed wrong code in mutations that may lead to memory corruption. Fixed segfault with read of address `0x14c0` that may happed due to concurrent `DROP TABLE` and `SELECT` from `system.parts` or `system.parts_columns`. Fixed race condition in preparation of mutation queries. Fixed deadlock caused by `OPTIMIZE` of Replicated tables and concurrent modification operations like ALTERs. [#6514](https://github.com/ClickHouse/ClickHouse/pull/6514) ([alexey-milovidov](https://github.com/alexey-milovidov))
* Removed extra verbose logging in MySQL interface [#6389](https://github.com/ClickHouse/ClickHouse/pull/6389) ([alexey-milovidov](https://github.com/alexey-milovidov))
* Return ability to parse boolean settings from 'true' and 'false' in configuration file. [#6278](https://github.com/ClickHouse/ClickHouse/pull/6278) ([alesapin](https://github.com/alesapin))
* Return the ability to parse boolean settings from 'true' and 'false' in the configuration file. [#6278](https://github.com/ClickHouse/ClickHouse/pull/6278) ([alesapin](https://github.com/alesapin))
* Fix crash in `quantile` and `median` function over `Nullable(Decimal128)`. [#6378](https://github.com/ClickHouse/ClickHouse/pull/6378) ([Artem Zuikov](https://github.com/4ertus2))
* Fixed possible incomplete result returned by `SELECT` query with `WHERE` condition on primary key contained conversion to Float type. It was caused by incorrect checking of monotonicity in `toFloat` function. [#6248](https://github.com/ClickHouse/ClickHouse/issues/6248) [#6374](https://github.com/ClickHouse/ClickHouse/pull/6374) ([dimarub2000](https://github.com/dimarub2000))
* Check `max_expanded_ast_elements` setting for mutations. Clear mutations after `TRUNCATE TABLE`. [#6205](https://github.com/ClickHouse/ClickHouse/pull/6205) ([Winter Zhang](https://github.com/zhang2014))
@ -424,8 +424,8 @@ fix comments to make obvious that it may throw.
* Fix bug with writing secondary indices marks with adaptive granularity. [#6126](https://github.com/ClickHouse/ClickHouse/pull/6126) ([alesapin](https://github.com/alesapin))
* Fix initialization order while server startup. Since `StorageMergeTree::background_task_handle` is initialized in `startup()` the `MergeTreeBlockOutputStream::write()` may try to use it before initialization. Just check if it is initialized. [#6080](https://github.com/ClickHouse/ClickHouse/pull/6080) ([Ivan](https://github.com/abyss7))
* Clearing the data buffer from the previous read operation that was completed with an error. [#6026](https://github.com/ClickHouse/ClickHouse/pull/6026) ([Nikolay](https://github.com/bopohaa))
* Fix bug with enabling adaptive granularity when creating new replica for Replicated*MergeTree table. [#6394](https://github.com/ClickHouse/ClickHouse/issues/6394) [#6452](https://github.com/ClickHouse/ClickHouse/pull/6452) ([alesapin](https://github.com/alesapin))
* Fixed possible crash during server startup in case of exception happened in `libunwind` during exception at access to uninitialised `ThreadStatus` structure. [#6456](https://github.com/ClickHouse/ClickHouse/pull/6456) ([Nikita Mikhaylov](https://github.com/nikitamikhaylov))
* Fix bug with enabling adaptive granularity when creating a new replica for Replicated*MergeTree table. [#6394](https://github.com/ClickHouse/ClickHouse/issues/6394) [#6452](https://github.com/ClickHouse/ClickHouse/pull/6452) ([alesapin](https://github.com/alesapin))
* Fixed possible crash during server startup in case of exception happened in `libunwind` during exception at access to uninitialized `ThreadStatus` structure. [#6456](https://github.com/ClickHouse/ClickHouse/pull/6456) ([Nikita Mikhaylov](https://github.com/nikitamikhaylov))
* Fix crash in `yandexConsistentHash` function. Found by fuzz test. [#6304](https://github.com/ClickHouse/ClickHouse/issues/6304) [#6305](https://github.com/ClickHouse/ClickHouse/pull/6305) ([alexey-milovidov](https://github.com/alexey-milovidov))
* Fixed the possibility of hanging queries when server is overloaded and global thread pool becomes near full. This have higher chance to happen on clusters with large number of shards (hundreds), because distributed queries allocate a thread per connection to each shard. For example, this issue may reproduce if a cluster of 330 shards is processing 30 concurrent distributed queries. This issue affects all versions starting from 19.2. [#6301](https://github.com/ClickHouse/ClickHouse/pull/6301) ([alexey-milovidov](https://github.com/alexey-milovidov))
* Fixed logic of `arrayEnumerateUniqRanked` function. [#6423](https://github.com/ClickHouse/ClickHouse/pull/6423) ([alexey-milovidov](https://github.com/alexey-milovidov))
@ -669,7 +669,7 @@ fix comments to make obvious that it may throw.
* Fix kafka tests. [#6805](https://github.com/ClickHouse/ClickHouse/pull/6805) ([Ivan](https://github.com/abyss7))
### Security Fix
* If the attacker has write access to ZooKeeper and is able to run custom server available from the network where ClickHouse run, it can create custom-built malicious server that will act as ClickHouse replica and register it in ZooKeeper. When another replica will fetch data part from malicious replica, it can force clickhouse-server to write to arbitrary path on filesystem. Found by Eldar Zaitov, information security team at Yandex. [#6247](https://github.com/ClickHouse/ClickHouse/pull/6247) ([alexey-milovidov](https://github.com/alexey-milovidov))
* If the attacker has write access to ZooKeeper and is able to run custom server available from the network where ClickHouse runs, it can create custom-built malicious server that will act as ClickHouse replica and register it in ZooKeeper. When another replica will fetch data part from malicious replica, it can force clickhouse-server to write to arbitrary path on filesystem. Found by Eldar Zaitov, information security team at Yandex. [#6247](https://github.com/ClickHouse/ClickHouse/pull/6247) ([alexey-milovidov](https://github.com/alexey-milovidov))
## ClickHouse release 19.13.3.26, 2019-08-22
@ -697,7 +697,7 @@ fix comments to make obvious that it may throw.
* Now client receive logs from server with any desired level by setting `send_logs_level` regardless to the log level specified in server settings. [#5964](https://github.com/ClickHouse/ClickHouse/pull/5964) ([Nikita Mikhaylov](https://github.com/nikitamikhaylov))
### Backward Incompatible Change
* The setting `input_format_defaults_for_omitted_fields` is enabled by default. Inserts in Distibuted tables need this setting to be the same on cluster (you need to set it before rolling update). It enables calculation of complex default expressions for omitted fields in `JSONEachRow` and `CSV*` formats. It should be the expected behaviour but may lead to negligible performance difference. [#6043](https://github.com/ClickHouse/ClickHouse/pull/6043) ([Artem Zuikov](https://github.com/4ertus2)), [#5625](https://github.com/ClickHouse/ClickHouse/pull/5625) ([akuzm](https://github.com/akuzm))
* The setting `input_format_defaults_for_omitted_fields` is enabled by default. Inserts in Distributed tables need this setting to be the same on cluster (you need to set it before rolling update). It enables calculation of complex default expressions for omitted fields in `JSONEachRow` and `CSV*` formats. It should be the expected behavior but may lead to negligible performance difference. [#6043](https://github.com/ClickHouse/ClickHouse/pull/6043) ([Artem Zuikov](https://github.com/4ertus2)), [#5625](https://github.com/ClickHouse/ClickHouse/pull/5625) ([akuzm](https://github.com/akuzm))
### Experimental features
* New query processing pipeline. Use `experimental_use_processors=1` option to enable it. Use for your own trouble. [#4914](https://github.com/ClickHouse/ClickHouse/pull/4914) ([Nikolai Kochetov](https://github.com/KochetovNicolai))
@ -1478,7 +1478,7 @@ lee](https://github.com/neverlee))
### Bug fixes
* Fixed error in #3920. This error manifestate itself as random cache corruption (messages `Unknown codec family code`, `Cannot seek through file`) and segfaults. This bug first appeared in version 19.1 and is present in versions up to 19.1.10 and 19.3.6. [#4623](https://github.com/ClickHouse/ClickHouse/pull/4623) ([alexey-milovidov](https://github.com/alexey-milovidov))
* Fixed error in #3920. This error manifests itself as random cache corruption (messages `Unknown codec family code`, `Cannot seek through file`) and segfaults. This bug first appeared in version 19.1 and is present in versions up to 19.1.10 and 19.3.6. [#4623](https://github.com/ClickHouse/ClickHouse/pull/4623) ([alexey-milovidov](https://github.com/alexey-milovidov))
## ClickHouse release 19.3.6, 2019-03-02
@ -2335,7 +2335,7 @@ The expression must be a chain of equalities joined by the AND operator. Each si
### Improvements:
* Changed the numbering scheme for release versions. Now the first part contains the year of release (A.D., Moscow timezone, minus 2000), the second part contains the number for major changes (increases for most releases), and the third part is the patch version. Releases are still backwards compatible, unless otherwise stated in the changelog.
* Changed the numbering scheme for release versions. Now the first part contains the year of release (A.D., Moscow timezone, minus 2000), the second part contains the number for major changes (increases for most releases), and the third part is the patch version. Releases are still backward compatible, unless otherwise stated in the changelog.
* Faster conversions of floating-point numbers to a string ([Amos Bird](https://github.com/ClickHouse/ClickHouse/pull/2664)).
* If some rows were skipped during an insert due to parsing errors (this is possible with the `input_allow_errors_num` and `input_allow_errors_ratio` settings enabled), the number of skipped rows is now written to the server log ([Leonardo Cecchi](https://github.com/ClickHouse/ClickHouse/pull/2669)).
@ -2534,7 +2534,7 @@ The expression must be a chain of equalities joined by the AND operator. Each si
* Configuration of the table level for the `ReplicatedMergeTree` family in order to minimize the amount of data stored in Zookeeper: : `use_minimalistic_checksums_in_zookeeper = 1`
* Configuration of the `clickhouse-client` prompt. By default, server names are now output to the prompt. The server's display name can be changed. It's also sent in the `X-ClickHouse-Display-Name` HTTP header (Kirill Shvakov).
* Multiple comma-separated `topics` can be specified for the `Kafka` engine (Tobias Adamson)
* When a query is stopped by `KILL QUERY` or `replace_running_query`, the client receives the `Query was cancelled` exception instead of an incomplete result.
* When a query is stopped by `KILL QUERY` or `replace_running_query`, the client receives the `Query was canceled` exception instead of an incomplete result.
### Improvements:

3
README.md
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@ -13,8 +13,7 @@ ClickHouse is an open-source column-oriented database management system that all
* You can also [fill this form](https://forms.yandex.com/surveys/meet-yandex-clickhouse-team/) to meet Yandex ClickHouse team in person.
## Upcoming Events
* [ClickHouse Meetup in Tokyo](https://clickhouse.connpass.com/event/147001/) on November 14.
* [ClickHouse Meetup in Istanbul](https://www.eventbrite.com/e/clickhouse-meetup-istanbul-create-blazing-fast-experiences-w-clickhouse-tickets-73101120419) on November 19.
* [ClickHouse Meetup in Ankara](https://www.eventbrite.com/e/clickhouse-meetup-ankara-create-blazing-fast-experiences-w-clickhouse-tickets-73100530655) on November 21.
* [ClickHouse Meetup in Singapore](https://www.meetup.com/Singapore-Clickhouse-Meetup-Group/events/265085331/) on November 23.
* [ClickHouse Meetup in San Francisco](https://www.eventbrite.com/e/clickhouse-december-meetup-registration-78642047481) on December 3.

2
contrib/poco vendored

@ -1 +1 @@
Subproject commit 6216cc01a107ce149863411ca29013a224f80343
Subproject commit 2b273bfe9db89429b2040c024484dee0197e48c7

2
dbms/CMakeLists.txt
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@ -76,7 +76,7 @@ elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
endif()
if (USE_DEBUG_HELPERS)
set (INCLUDE_DEBUG_HELPERS "-include ${ClickHouse_SOURCE_DIR}/libs/libcommon/include/common/iostream_debug_helpers.h")
set (INCLUDE_DEBUG_HELPERS "-I${ClickHouse_SOURCE_DIR}/libs/libcommon/include -include ${ClickHouse_SOURCE_DIR}/dbms/src/Core/iostream_debug_helpers.h")
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${INCLUDE_DEBUG_HELPERS}")
endif ()

6
dbms/programs/client/Client.cpp
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@ -1226,7 +1226,7 @@ private:
/// Returns true if one should continue receiving packets.
bool receiveAndProcessPacket()
{
Connection::Packet packet = connection->receivePacket();
Packet packet = connection->receivePacket();
switch (packet.type)
{
@ -1274,7 +1274,7 @@ private:
{
while (true)
{
Connection::Packet packet = connection->receivePacket();
Packet packet = connection->receivePacket();
switch (packet.type)
{
@ -1308,7 +1308,7 @@ private:
{
while (true)
{
Connection::Packet packet = connection->receivePacket();
Packet packet = connection->receivePacket();
switch (packet.type)
{

2
dbms/programs/client/Suggest.h
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@ -113,7 +113,7 @@ private:
while (true)
{
Connection::Packet packet = connection.receivePacket();
Packet packet = connection.receivePacket();
switch (packet.type)
{
case Protocol::Server::Data:

4
dbms/programs/performance-test/PerformanceTest.cpp
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@ -35,7 +35,7 @@ void waitQuery(Connection & connection)
if (!connection.poll(1000000))
continue;
Connection::Packet packet = connection.receivePacket();
Packet packet = connection.receivePacket();
switch (packet.type)
{
case Protocol::Server::EndOfStream:
@ -120,7 +120,7 @@ bool PerformanceTest::checkPreconditions() const
while (true)
{
Connection::Packet packet = connection.receivePacket();
Packet packet = connection.receivePacket();
if (packet.type == Protocol::Server::Data)
{

18
dbms/programs/server/MySQLHandler.cpp
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@ -216,15 +216,15 @@ void MySQLHandler::finishHandshake(MySQLProtocol::HandshakeResponse & packet)
void MySQLHandler::authenticate(const String & user_name, const String & auth_plugin_name, const String & initial_auth_response)
{
// For compatibility with JavaScript MySQL client, Native41 authentication plugin is used when possible (if password is specified using double SHA1). Otherwise SHA256 plugin is used.
auto user = connection_context.getUser(user_name);
if (user->authentication.getType() != DB::Authentication::DOUBLE_SHA1_PASSWORD)
{
authPluginSSL();
}
try
{
// For compatibility with JavaScript MySQL client, Native41 authentication plugin is used when possible (if password is specified using double SHA1). Otherwise SHA256 plugin is used.
auto user = connection_context.getUser(user_name);
if (user->authentication.getType() != DB::Authentication::DOUBLE_SHA1_PASSWORD)
{
authPluginSSL();
}
std::optional<String> auth_response = auth_plugin_name == auth_plugin->getName() ? std::make_optional<String>(initial_auth_response) : std::nullopt;
auth_plugin->authenticate(user_name, auth_response, connection_context, packet_sender, secure_connection, socket().peerAddress());
}
@ -294,12 +294,12 @@ void MySQLHandler::comQuery(ReadBuffer & payload)
void MySQLHandler::authPluginSSL()
{
throw Exception("Compiled without SSL", ErrorCodes::SUPPORT_IS_DISABLED);
throw Exception("ClickHouse was built without SSL support. Try specifying password using double SHA1 in users.xml.", ErrorCodes::SUPPORT_IS_DISABLED);
}
void MySQLHandler::finishHandshakeSSL([[maybe_unused]] size_t packet_size, [[maybe_unused]] char * buf, [[maybe_unused]] size_t pos, [[maybe_unused]] std::function<void(size_t)> read_bytes, [[maybe_unused]] MySQLProtocol::HandshakeResponse & packet)
{
throw Exception("Compiled without SSL", ErrorCodes::SUPPORT_IS_DISABLED);
throw Exception("Client requested SSL, while it is disabled.", ErrorCodes::SUPPORT_IS_DISABLED);
}
#if USE_SSL && USE_POCO_NETSSL

6
dbms/programs/server/Server.cpp
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@ -814,7 +814,6 @@ int Server::main(const std::vector<std::string> & /*args*/)
create_server("mysql_port", [&](UInt16 port)
{
#if USE_SSL
Poco::Net::ServerSocket socket;
auto address = socket_bind_listen(socket, listen_host, port, /* secure = */ true);
socket.setReceiveTimeout(Poco::Timespan());
@ -826,11 +825,6 @@ int Server::main(const std::vector<std::string> & /*args*/)
new Poco::Net::TCPServerParams));
LOG_INFO(log, "Listening for MySQL compatibility protocol: " + address.toString());
#else
UNUSED(port);
throw Exception{"SSL support for MySQL protocol is disabled because Poco library was built without NetSSL support.",
ErrorCodes::SUPPORT_IS_DISABLED};
#endif
});
}

8
dbms/programs/server/TCPHandler.cpp
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@ -924,7 +924,9 @@ void TCPHandler::receiveQuery()
/// Per query settings.
Settings & settings = query_context->getSettingsRef();
settings.deserialize(*in);
auto settings_format = (client_revision >= DBMS_MIN_REVISION_WITH_SETTINGS_SERIALIZED_AS_STRINGS) ? SettingsBinaryFormat::STRINGS
: SettingsBinaryFormat::OLD;
settings.deserialize(*in, settings_format);
/// Sync timeouts on client and server during current query to avoid dangling queries on server
/// NOTE: We use settings.send_timeout for the receive timeout and vice versa (change arguments ordering in TimeoutSetter),
@ -953,7 +955,9 @@ void TCPHandler::receiveUnexpectedQuery()
skip_client_info.read(*in, client_revision);
Settings & skip_settings = query_context->getSettingsRef();
skip_settings.deserialize(*in);
auto settings_format = (client_revision >= DBMS_MIN_REVISION_WITH_SETTINGS_SERIALIZED_AS_STRINGS) ? SettingsBinaryFormat::STRINGS
: SettingsBinaryFormat::OLD;
skip_settings.deserialize(*in, settings_format);
readVarUInt(skip_uint_64, *in);
readVarUInt(skip_uint_64, *in);

8
dbms/src/Client/Connection.cpp
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@ -409,7 +409,11 @@ void Connection::sendQuery(
/// Per query settings.
if (settings)
settings->serialize(*out);
{
auto settings_format = (server_revision >= DBMS_MIN_REVISION_WITH_SETTINGS_SERIALIZED_AS_STRINGS) ? SettingsBinaryFormat::STRINGS
: SettingsBinaryFormat::OLD;
settings->serialize(*out, settings_format);
}
else
writeStringBinary("" /* empty string is a marker of the end of settings */, *out);
@ -612,7 +616,7 @@ std::optional<UInt64> Connection::checkPacket(size_t timeout_microseconds)
}
Connection::Packet Connection::receivePacket()
Packet Connection::receivePacket()
{
try
{

29
dbms/src/Client/Connection.h
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@ -42,6 +42,21 @@ using ConnectionPtr = std::shared_ptr<Connection>;
using Connections = std::vector<ConnectionPtr>;
/// Packet that could be received from server.
struct Packet
{
UInt64 type;
Block block;
std::unique_ptr<Exception> exception;
std::vector<String> multistring_message;
Progress progress;
BlockStreamProfileInfo profile_info;
Packet() : type(Protocol::Server::Hello) {}
};
/** Connection with database server, to use by client.
* How to use - see Core/Protocol.h
* (Implementation of server end - see Server/TCPHandler.h)
@ -87,20 +102,6 @@ public:
}
/// Packet that could be received from server.
struct Packet
{
UInt64 type;
Block block;
std::unique_ptr<Exception> exception;
std::vector<String> multistring_message;
Progress progress;
BlockStreamProfileInfo profile_info;
Packet() : type(Protocol::Server::Hello) {}
};
/// Change default database. Changes will take effect on next reconnect.
void setDefaultDatabase(const String & database);

14
dbms/src/Client/MultiplexedConnections.cpp
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@ -138,10 +138,10 @@ void MultiplexedConnections::sendQuery(
sent_query = true;
}
Connection::Packet MultiplexedConnections::receivePacket()
Packet MultiplexedConnections::receivePacket()
{
std::lock_guard lock(cancel_mutex);
Connection::Packet packet = receivePacketUnlocked();
Packet packet = receivePacketUnlocked();
return packet;
}
@ -177,19 +177,19 @@ void MultiplexedConnections::sendCancel()
cancelled = true;
}
Connection::Packet MultiplexedConnections::drain()
Packet MultiplexedConnections::drain()
{
std::lock_guard lock(cancel_mutex);
if (!cancelled)
throw Exception("Cannot drain connections: cancel first.", ErrorCodes::LOGICAL_ERROR);
Connection::Packet res;
Packet res;
res.type = Protocol::Server::EndOfStream;
while (hasActiveConnections())
{
Connection::Packet packet = receivePacketUnlocked();
Packet packet = receivePacketUnlocked();
switch (packet.type)
{
@ -235,7 +235,7 @@ std::string MultiplexedConnections::dumpAddressesUnlocked() const
return os.str();
}
Connection::Packet MultiplexedConnections::receivePacketUnlocked()
Packet MultiplexedConnections::receivePacketUnlocked()
{
if (!sent_query)
throw Exception("Cannot receive packets: no query sent.", ErrorCodes::LOGICAL_ERROR);
@ -247,7 +247,7 @@ Connection::Packet MultiplexedConnections::receivePacketUnlocked()
if (current_connection == nullptr)
throw Exception("Logical error: no available replica", ErrorCodes::NO_AVAILABLE_REPLICA);
Connection::Packet packet = current_connection->receivePacket();
Packet packet = current_connection->receivePacket();
switch (packet.type)
{

6
dbms/src/Client/MultiplexedConnections.h
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@ -42,7 +42,7 @@ public:
bool with_pending_data = false);
/// Get packet from any replica.
Connection::Packet receivePacket();
Packet receivePacket();
/// Break all active connections.
void disconnect();
@ -54,7 +54,7 @@ public:
* Returns EndOfStream if no exception has been received. Otherwise
* returns the last received packet of type Exception.
*/
Connection::Packet drain();
Packet drain();
/// Get the replica addresses as a string.
std::string dumpAddresses() const;
@ -69,7 +69,7 @@ public:
private:
/// Internal version of `receivePacket` function without locking.
Connection::Packet receivePacketUnlocked();
Packet receivePacketUnlocked();
/// Internal version of `dumpAddresses` function without locking.
std::string dumpAddressesUnlocked() const;

4
dbms/src/Common/PODArray.h
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@ -430,11 +430,11 @@ public:
template <typename It1, typename It2>
void insert(iterator it, It1 from_begin, It2 from_end)
{
insertPrepare(from_begin, from_end);
size_t bytes_to_copy = this->byte_size(from_end - from_begin);
size_t bytes_to_move = (end() - it) * sizeof(T);
insertPrepare(from_begin, from_end);
if (unlikely(bytes_to_move))
memcpy(this->c_end + bytes_to_copy - bytes_to_move, this->c_end - bytes_to_move, bytes_to_move);

2
dbms/src/Common/ThreadStatus.h
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@ -4,7 +4,7 @@
#include <Common/ProfileEvents.h>
#include <Common/MemoryTracker.h>
#include <Core/SettingsCommon.h>
#include <Core/SettingsCollection.h>
#include <IO/Progress.h>

34
dbms/src/Common/tests/gtest_pod_array.cpp Normal file
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@ -0,0 +1,34 @@
#include <gtest/gtest.h>
#include <Common/PODArray.h>
using namespace DB;
TEST(Common, PODArray_Insert)
{
std::string str = "test_string_abacaba";
PODArray<char> chars;
chars.insert(chars.end(), str.begin(), str.end());
EXPECT_EQ(str, std::string(chars.data(), chars.size()));
std::string insert_in_the_middle = "insert_in_the_middle";
auto pos = str.size() / 2;
str.insert(str.begin() + pos, insert_in_the_middle.begin(), insert_in_the_middle.end());
chars.insert(chars.begin() + pos, insert_in_the_middle.begin(), insert_in_the_middle.end());
EXPECT_EQ(str, std::string(chars.data(), chars.size()));
std::string insert_with_resize;
insert_with_resize.reserve(chars.capacity() * 2);
char cur_char = 'a';
while (insert_with_resize.size() < insert_with_resize.capacity())
{
insert_with_resize += cur_char;
if (cur_char == 'z')
cur_char = 'a';
else
++cur_char;
}
str.insert(str.begin(), insert_with_resize.begin(), insert_with_resize.end());
chars.insert(chars.begin(), insert_with_resize.begin(), insert_with_resize.end());
EXPECT_EQ(str, std::string(chars.data(), chars.size()));
}

10
dbms/src/Core/Defines.h
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@ -59,9 +59,11 @@
#define DBMS_MIN_REVISION_WITH_COLUMN_DEFAULTS_METADATA 54410
#define DBMS_MIN_REVISION_WITH_LOW_CARDINALITY_TYPE 54405
#define DBMS_MIN_REVISION_WITH_CLIENT_WRITE_INFO 54420
/// Mininum revision supporting SettingsBinaryFormat::STRINGS.
#define DBMS_MIN_REVISION_WITH_SETTINGS_SERIALIZED_AS_STRINGS 54429
/// Version of ClickHouse TCP protocol. Set to git tag with latest protocol change.
#define DBMS_TCP_PROTOCOL_VERSION 54226
@ -148,9 +150,9 @@
#define OPTIMIZE(x)
#endif
/// This number is only used for distributed version compatible.
/// It could be any magic number.
#define DBMS_DISTRIBUTED_SENDS_MAGIC_NUMBER 0xCAFECABE
/// Marks that extra information is sent to a shard. It could be any magic numbers.
#define DBMS_DISTRIBUTED_SIGNATURE_EXTRA_INFO 0xCAFEDACEull
#define DBMS_DISTRIBUTED_SIGNATURE_SETTINGS_OLD_FORMAT 0xCAFECABEull
#if !__has_include(<sanitizer/asan_interface.h>)
# define ASAN_UNPOISON_MEMORY_REGION(a, b)

515
dbms/src/Core/Settings.h
View File

@ -1,6 +1,6 @@
#pragma once
#include "SettingsCommon.h"
#include <Core/SettingsCollection.h>
#include <Core/Defines.h>
@ -35,219 +35,222 @@ struct Settings : public SettingsCollection<Settings>
/// http://en.cppreference.com/w/cpp/language/aggregate_initialization
Settings() {}
/** List of settings: type, name, default value.
/** List of settings: type, name, default value, description, flags
*
* This looks rather unconvenient. It is done that way to avoid repeating settings in different places.
* Note: as an alternative, we could implement settings to be completely dynamic in form of map: String -> Field,
* but we are not going to do it, because settings is used everywhere as static struct fields.
*
* `flags` can be either 0 or IGNORABLE.
* A setting is "IGNORABLE" if it doesn't affects the results of the queries and can be ignored without exception.
*/
#define LIST_OF_SETTINGS(M) \
M(SettingUInt64, min_compress_block_size, 65536, "The actual size of the block to compress, if the uncompressed data less than max_compress_block_size is no less than this value and no less than the volume of data for one mark.") \
M(SettingUInt64, max_compress_block_size, 1048576, "The maximum size of blocks of uncompressed data before compressing for writing to a table.") \
M(SettingUInt64, max_block_size, DEFAULT_BLOCK_SIZE, "Maximum block size for reading") \
M(SettingUInt64, max_insert_block_size, DEFAULT_INSERT_BLOCK_SIZE, "The maximum block size for insertion, if we control the creation of blocks for insertion.") \
M(SettingUInt64, min_insert_block_size_rows, DEFAULT_INSERT_BLOCK_SIZE, "Squash blocks passed to INSERT query to specified size in rows, if blocks are not big enough.") \
M(SettingUInt64, min_insert_block_size_bytes, (DEFAULT_INSERT_BLOCK_SIZE * 256), "Squash blocks passed to INSERT query to specified size in bytes, if blocks are not big enough.") \
M(SettingMaxThreads, max_threads, 0, "The maximum number of threads to execute the request. By default, it is determined automatically.") \
M(SettingMaxThreads, max_alter_threads, 0, "The maximum number of threads to execute the ALTER requests. By default, it is determined automatically.") \
M(SettingUInt64, max_read_buffer_size, DBMS_DEFAULT_BUFFER_SIZE, "The maximum size of the buffer to read from the filesystem.") \
M(SettingUInt64, max_distributed_connections, 1024, "The maximum number of connections for distributed processing of one query (should be greater than max_threads).") \
M(SettingUInt64, max_query_size, 262144, "Which part of the query can be read into RAM for parsing (the remaining data for INSERT, if any, is read later)") \
M(SettingUInt64, interactive_delay, 100000, "The interval in microseconds to check if the request is cancelled, and to send progress info.") \
M(SettingSeconds, connect_timeout, DBMS_DEFAULT_CONNECT_TIMEOUT_SEC, "Connection timeout if there are no replicas.") \
M(SettingMilliseconds, connect_timeout_with_failover_ms, DBMS_DEFAULT_CONNECT_TIMEOUT_WITH_FAILOVER_MS, "Connection timeout for selecting first healthy replica.") \
M(SettingSeconds, receive_timeout, DBMS_DEFAULT_RECEIVE_TIMEOUT_SEC, "") \
M(SettingSeconds, send_timeout, DBMS_DEFAULT_SEND_TIMEOUT_SEC, "") \
M(SettingSeconds, tcp_keep_alive_timeout, 0, "The time in seconds the connection needs to remain idle before TCP starts sending keepalive probes") \
M(SettingMilliseconds, queue_max_wait_ms, 0, "The wait time in the request queue, if the number of concurrent requests exceeds the maximum.") \
M(SettingMilliseconds, connection_pool_max_wait_ms, 0, "The wait time when connection pool is full.") \
M(SettingMilliseconds, replace_running_query_max_wait_ms, 5000, "The wait time for running query with the same query_id to finish when setting 'replace_running_query' is active.") \
M(SettingMilliseconds, kafka_max_wait_ms, 5000, "The wait time for reading from Kafka before retry.") \
M(SettingUInt64, poll_interval, DBMS_DEFAULT_POLL_INTERVAL, "Block at the query wait loop on the server for the specified number of seconds.") \
M(SettingUInt64, idle_connection_timeout, 3600, "Close idle TCP connections after specified number of seconds.") \
M(SettingUInt64, distributed_connections_pool_size, DBMS_DEFAULT_DISTRIBUTED_CONNECTIONS_POOL_SIZE, "Maximum number of connections with one remote server in the pool.") \
M(SettingUInt64, connections_with_failover_max_tries, DBMS_CONNECTION_POOL_WITH_FAILOVER_DEFAULT_MAX_TRIES, "The maximum number of attempts to connect to replicas.") \
M(SettingUInt64, s3_min_upload_part_size, 512*1024*1024, "The mininum size of part to upload during multipart upload to S3.") \
M(SettingBool, extremes, false, "Calculate minimums and maximums of the result columns. They can be output in JSON-formats.") \
M(SettingBool, use_uncompressed_cache, true, "Whether to use the cache of uncompressed blocks.") \
M(SettingBool, replace_running_query, false, "Whether the running request should be canceled with the same id as the new one.") \
M(SettingUInt64, background_pool_size, 16, "Number of threads performing background work for tables (for example, merging in merge tree). Only has meaning at server startup.") \
M(SettingUInt64, background_schedule_pool_size, 16, "Number of threads performing background tasks for replicated tables. Only has meaning at server startup.") \
M(SettingUInt64, min_compress_block_size, 65536, "The actual size of the block to compress, if the uncompressed data less than max_compress_block_size is no less than this value and no less than the volume of data for one mark.", 0) \
M(SettingUInt64, max_compress_block_size, 1048576, "The maximum size of blocks of uncompressed data before compressing for writing to a table.", 0) \
M(SettingUInt64, max_block_size, DEFAULT_BLOCK_SIZE, "Maximum block size for reading", 0) \
M(SettingUInt64, max_insert_block_size, DEFAULT_INSERT_BLOCK_SIZE, "The maximum block size for insertion, if we control the creation of blocks for insertion.", 0) \
M(SettingUInt64, min_insert_block_size_rows, DEFAULT_INSERT_BLOCK_SIZE, "Squash blocks passed to INSERT query to specified size in rows, if blocks are not big enough.", 0) \
M(SettingUInt64, min_insert_block_size_bytes, (DEFAULT_INSERT_BLOCK_SIZE * 256), "Squash blocks passed to INSERT query to specified size in bytes, if blocks are not big enough.", 0) \
M(SettingMaxThreads, max_threads, 0, "The maximum number of threads to execute the request. By default, it is determined automatically.", 0) \
M(SettingMaxThreads, max_alter_threads, 0, "The maximum number of threads to execute the ALTER requests. By default, it is determined automatically.", 0) \
M(SettingUInt64, max_read_buffer_size, DBMS_DEFAULT_BUFFER_SIZE, "The maximum size of the buffer to read from the filesystem.", 0) \
M(SettingUInt64, max_distributed_connections, 1024, "The maximum number of connections for distributed processing of one query (should be greater than max_threads).", 0) \
M(SettingUInt64, max_query_size, 262144, "Which part of the query can be read into RAM for parsing (the remaining data for INSERT, if any, is read later)", 0) \
M(SettingUInt64, interactive_delay, 100000, "The interval in microseconds to check if the request is cancelled, and to send progress info.", 0) \
M(SettingSeconds, connect_timeout, DBMS_DEFAULT_CONNECT_TIMEOUT_SEC, "Connection timeout if there are no replicas.", 0) \
M(SettingMilliseconds, connect_timeout_with_failover_ms, DBMS_DEFAULT_CONNECT_TIMEOUT_WITH_FAILOVER_MS, "Connection timeout for selecting first healthy replica.", 0) \
M(SettingSeconds, receive_timeout, DBMS_DEFAULT_RECEIVE_TIMEOUT_SEC, "", 0) \
M(SettingSeconds, send_timeout, DBMS_DEFAULT_SEND_TIMEOUT_SEC, "", 0) \
M(SettingSeconds, tcp_keep_alive_timeout, 0, "The time in seconds the connection needs to remain idle before TCP starts sending keepalive probes", 0) \
M(SettingMilliseconds, queue_max_wait_ms, 0, "The wait time in the request queue, if the number of concurrent requests exceeds the maximum.", 0) \
M(SettingMilliseconds, connection_pool_max_wait_ms, 0, "The wait time when connection pool is full.", 0) \
M(SettingMilliseconds, replace_running_query_max_wait_ms, 5000, "The wait time for running query with the same query_id to finish when setting 'replace_running_query' is active.", 0) \
M(SettingMilliseconds, kafka_max_wait_ms, 5000, "The wait time for reading from Kafka before retry.", 0) \
M(SettingUInt64, poll_interval, DBMS_DEFAULT_POLL_INTERVAL, "Block at the query wait loop on the server for the specified number of seconds.", 0) \
M(SettingUInt64, idle_connection_timeout, 3600, "Close idle TCP connections after specified number of seconds.", 0) \
M(SettingUInt64, distributed_connections_pool_size, DBMS_DEFAULT_DISTRIBUTED_CONNECTIONS_POOL_SIZE, "Maximum number of connections with one remote server in the pool.", 0) \
M(SettingUInt64, connections_with_failover_max_tries, DBMS_CONNECTION_POOL_WITH_FAILOVER_DEFAULT_MAX_TRIES, "The maximum number of attempts to connect to replicas.", 0) \
M(SettingUInt64, s3_min_upload_part_size, 512*1024*1024, "The mininum size of part to upload during multipart upload to S3.", 0) \
M(SettingBool, extremes, false, "Calculate minimums and maximums of the result columns. They can be output in JSON-formats.", 0) \
M(SettingBool, use_uncompressed_cache, true, "Whether to use the cache of uncompressed blocks.", 0) \
M(SettingBool, replace_running_query, false, "Whether the running request should be canceled with the same id as the new one.", 0) \
M(SettingUInt64, background_pool_size, 16, "Number of threads performing background work for tables (for example, merging in merge tree). Only has meaning at server startup.", 0) \
M(SettingUInt64, background_schedule_pool_size, 16, "Number of threads performing background tasks for replicated tables. Only has meaning at server startup.", 0) \
\
M(SettingMilliseconds, distributed_directory_monitor_sleep_time_ms, 100, "Sleep time for StorageDistributed DirectoryMonitors, in case of any errors delay grows exponentially.") \
M(SettingMilliseconds, distributed_directory_monitor_max_sleep_time_ms, 30000, "Maximum sleep time for StorageDistributed DirectoryMonitors, it limits exponential growth too.") \
M(SettingMilliseconds, distributed_directory_monitor_sleep_time_ms, 100, "Sleep time for StorageDistributed DirectoryMonitors, in case of any errors delay grows exponentially.", 0) \
M(SettingMilliseconds, distributed_directory_monitor_max_sleep_time_ms, 30000, "Maximum sleep time for StorageDistributed DirectoryMonitors, it limits exponential growth too.", 0) \
\
M(SettingBool, distributed_directory_monitor_batch_inserts, false, "Should StorageDistributed DirectoryMonitors try to batch individual inserts into bigger ones.") \
M(SettingBool, distributed_directory_monitor_batch_inserts, false, "Should StorageDistributed DirectoryMonitors try to batch individual inserts into bigger ones.", 0) \
\
M(SettingBool, optimize_move_to_prewhere, true, "Allows disabling WHERE to PREWHERE optimization in SELECT queries from MergeTree.") \
M(SettingBool, optimize_move_to_prewhere, true, "Allows disabling WHERE to PREWHERE optimization in SELECT queries from MergeTree.", 0) \
\
M(SettingUInt64, replication_alter_partitions_sync, 1, "Wait for actions to manipulate the partitions. 0 - do not wait, 1 - wait for execution only of itself, 2 - wait for everyone.") \
M(SettingUInt64, replication_alter_columns_timeout, 60, "Wait for actions to change the table structure within the specified number of seconds. 0 - wait unlimited time.") \
M(SettingUInt64, replication_alter_partitions_sync, 1, "Wait for actions to manipulate the partitions. 0 - do not wait, 1 - wait for execution only of itself, 2 - wait for everyone.", 0) \
M(SettingUInt64, replication_alter_columns_timeout, 60, "Wait for actions to change the table structure within the specified number of seconds. 0 - wait unlimited time.", 0) \
\
M(SettingLoadBalancing, load_balancing, LoadBalancing::RANDOM, "Which replicas (among healthy replicas) to preferably send a query to (on the first attempt) for distributed processing.") \
M(SettingLoadBalancing, load_balancing, LoadBalancing::RANDOM, "Which replicas (among healthy replicas) to preferably send a query to (on the first attempt) for distributed processing.", 0) \
\
M(SettingTotalsMode, totals_mode, TotalsMode::AFTER_HAVING_EXCLUSIVE, "How to calculate TOTALS when HAVING is present, as well as when max_rows_to_group_by and group_by_overflow_mode = ‘any’ are present.") \
M(SettingFloat, totals_auto_threshold, 0.5, "The threshold for totals_mode = 'auto'.") \
M(SettingTotalsMode, totals_mode, TotalsMode::AFTER_HAVING_EXCLUSIVE, "How to calculate TOTALS when HAVING is present, as well as when max_rows_to_group_by and group_by_overflow_mode = ‘any’ are present.", 0) \
M(SettingFloat, totals_auto_threshold, 0.5, "The threshold for totals_mode = 'auto'.", 0) \
\
M(SettingBool, allow_suspicious_low_cardinality_types, false, "In CREATE TABLE statement allows specifying LowCardinality modifier for types of small fixed size (8 or less). Enabling this may increase merge times and memory consumption.") \
M(SettingBool, compile_expressions, false, "Compile some scalar functions and operators to native code.") \
M(SettingUInt64, min_count_to_compile, 3, "The number of structurally identical queries before they are compiled.") \
M(SettingUInt64, min_count_to_compile_expression, 3, "The number of identical expressions before they are JIT-compiled") \
M(SettingUInt64, group_by_two_level_threshold, 100000, "From what number of keys, a two-level aggregation starts. 0 - the threshold is not set.") \
M(SettingUInt64, group_by_two_level_threshold_bytes, 100000000, "From what size of the aggregation state in bytes, a two-level aggregation begins to be used. 0 - the threshold is not set. Two-level aggregation is used when at least one of the thresholds is triggered.") \
M(SettingBool, distributed_aggregation_memory_efficient, false, "Is the memory-saving mode of distributed aggregation enabled.") \
M(SettingUInt64, aggregation_memory_efficient_merge_threads, 0, "Number of threads to use for merge intermediate aggregation results in memory efficient mode. When bigger, then more memory is consumed. 0 means - same as 'max_threads'.") \
M(SettingBool, allow_suspicious_low_cardinality_types, false, "In CREATE TABLE statement allows specifying LowCardinality modifier for types of small fixed size (8 or less). Enabling this may increase merge times and memory consumption.", 0) \
M(SettingBool, compile_expressions, false, "Compile some scalar functions and operators to native code.", 0) \
M(SettingUInt64, min_count_to_compile, 3, "The number of structurally identical queries before they are compiled.", 0) \
M(SettingUInt64, min_count_to_compile_expression, 3, "The number of identical expressions before they are JIT-compiled", 0) \
M(SettingUInt64, group_by_two_level_threshold, 100000, "From what number of keys, a two-level aggregation starts. 0 - the threshold is not set.", 0) \
M(SettingUInt64, group_by_two_level_threshold_bytes, 100000000, "From what size of the aggregation state in bytes, a two-level aggregation begins to be used. 0 - the threshold is not set. Two-level aggregation is used when at least one of the thresholds is triggered.", 0) \
M(SettingBool, distributed_aggregation_memory_efficient, false, "Is the memory-saving mode of distributed aggregation enabled.", 0) \
M(SettingUInt64, aggregation_memory_efficient_merge_threads, 0, "Number of threads to use for merge intermediate aggregation results in memory efficient mode. When bigger, then more memory is consumed. 0 means - same as 'max_threads'.", 0) \
\
M(SettingUInt64, max_parallel_replicas, 1, "The maximum number of replicas of each shard used when the query is executed. For consistency (to get different parts of the same partition), this option only works for the specified sampling key. The lag of the replicas is not controlled.") \
M(SettingUInt64, parallel_replicas_count, 0, "") \
M(SettingUInt64, parallel_replica_offset, 0, "") \
M(SettingUInt64, max_parallel_replicas, 1, "The maximum number of replicas of each shard used when the query is executed. For consistency (to get different parts of the same partition), this option only works for the specified sampling key. The lag of the replicas is not controlled.", 0) \
M(SettingUInt64, parallel_replicas_count, 0, "", 0) \
M(SettingUInt64, parallel_replica_offset, 0, "", 0) \
\
M(SettingBool, skip_unavailable_shards, false, "If 1, ClickHouse silently skips unavailable shards and nodes unresolvable through DNS. Shard is marked as unavailable when none of the replicas can be reached.") \
M(SettingBool, skip_unavailable_shards, false, "If 1, ClickHouse silently skips unavailable shards and nodes unresolvable through DNS. Shard is marked as unavailable when none of the replicas can be reached.", 0) \
\
M(SettingBool, distributed_group_by_no_merge, false, "Do not merge aggregation states from different servers for distributed query processing - in case it is for certain that there are different keys on different shards.") \
M(SettingBool, optimize_skip_unused_shards, false, "Assumes that data is distributed by sharding_key. Optimization to skip unused shards if SELECT query filters by sharding_key.") \
M(SettingBool, distributed_group_by_no_merge, false, "Do not merge aggregation states from different servers for distributed query processing - in case it is for certain that there are different keys on different shards.", 0) \
M(SettingBool, optimize_skip_unused_shards, false, "Assumes that data is distributed by sharding_key. Optimization to skip unused shards if SELECT query filters by sharding_key.", 0) \
\
M(SettingUInt64, merge_tree_min_rows_for_concurrent_read, (20 * 8192), "If at least as many lines are read from one file, the reading can be parallelized.") \
M(SettingUInt64, merge_tree_min_bytes_for_concurrent_read, (24 * 10 * 1024 * 1024), "If at least as many bytes are read from one file, the reading can be parallelized.") \
M(SettingUInt64, merge_tree_min_rows_for_seek, 0, "You can skip reading more than that number of rows at the price of one seek per file.") \
M(SettingUInt64, merge_tree_min_bytes_for_seek, 0, "You can skip reading more than that number of bytes at the price of one seek per file.") \
M(SettingUInt64, merge_tree_coarse_index_granularity, 8, "If the index segment can contain the required keys, divide it into as many parts and recursively check them.") \
M(SettingUInt64, merge_tree_max_rows_to_use_cache, (128 * 8192), "The maximum number of rows per request, to use the cache of uncompressed data. If the request is large, the cache is not used. (For large queries not to flush out the cache.)") \
M(SettingUInt64, merge_tree_max_bytes_to_use_cache, (192 * 10 * 1024 * 1024), "The maximum number of rows per request, to use the cache of uncompressed data. If the request is large, the cache is not used. (For large queries not to flush out the cache.)") \
M(SettingUInt64, merge_tree_min_rows_for_concurrent_read, (20 * 8192), "If at least as many lines are read from one file, the reading can be parallelized.", 0) \
M(SettingUInt64, merge_tree_min_bytes_for_concurrent_read, (24 * 10 * 1024 * 1024), "If at least as many bytes are read from one file, the reading can be parallelized.", 0) \
M(SettingUInt64, merge_tree_min_rows_for_seek, 0, "You can skip reading more than that number of rows at the price of one seek per file.", 0) \
M(SettingUInt64, merge_tree_min_bytes_for_seek, 0, "You can skip reading more than that number of bytes at the price of one seek per file.", 0) \
M(SettingUInt64, merge_tree_coarse_index_granularity, 8, "If the index segment can contain the required keys, divide it into as many parts and recursively check them.", 0) \
M(SettingUInt64, merge_tree_max_rows_to_use_cache, (128 * 8192), "The maximum number of rows per request, to use the cache of uncompressed data. If the request is large, the cache is not used. (For large queries not to flush out the cache.)", 0) \
M(SettingUInt64, merge_tree_max_bytes_to_use_cache, (192 * 10 * 1024 * 1024), "The maximum number of rows per request, to use the cache of uncompressed data. If the request is large, the cache is not used. (For large queries not to flush out the cache.)", 0) \
\
M(SettingBool, merge_tree_uniform_read_distribution, true, "Distribute read from MergeTree over threads evenly, ensuring stable average execution time of each thread within one read operation.") \
M(SettingBool, merge_tree_uniform_read_distribution, true, "Distribute read from MergeTree over threads evenly, ensuring stable average execution time of each thread within one read operation.", 0) \
\
M(SettingUInt64, mysql_max_rows_to_insert, 65536, "The maximum number of rows in MySQL batch insertion of the MySQL storage engine") \
M(SettingUInt64, mysql_max_rows_to_insert, 65536, "The maximum number of rows in MySQL batch insertion of the MySQL storage engine", 0) \
\
M(SettingUInt64, optimize_min_equality_disjunction_chain_length, 3, "The minimum length of the expression `expr = x1 OR ... expr = xN` for optimization ") \
M(SettingUInt64, optimize_min_equality_disjunction_chain_length, 3, "The minimum length of the expression `expr = x1 OR ... expr = xN` for optimization ", 0) \
\
M(SettingUInt64, min_bytes_to_use_direct_io, 0, "The minimum number of bytes for reading the data with O_DIRECT option during SELECT queries execution. 0 - disabled.") \
M(SettingUInt64, min_bytes_to_use_direct_io, 0, "The minimum number of bytes for reading the data with O_DIRECT option during SELECT queries execution. 0 - disabled.", 0) \
\
M(SettingBool, force_index_by_date, 0, "Throw an exception if there is a partition key in a table, and it is not used.") \
M(SettingBool, force_primary_key, 0, "Throw an exception if there is primary key in a table, and it is not used.") \
M(SettingBool, force_index_by_date, 0, "Throw an exception if there is a partition key in a table, and it is not used.", 0) \
M(SettingBool, force_primary_key, 0, "Throw an exception if there is primary key in a table, and it is not used.", 0) \
\
M(SettingUInt64, mark_cache_min_lifetime, 10000, "If the maximum size of mark_cache is exceeded, delete only records older than mark_cache_min_lifetime seconds.") \
M(SettingUInt64, mark_cache_min_lifetime, 10000, "If the maximum size of mark_cache is exceeded, delete only records older than mark_cache_min_lifetime seconds.", 0) \
\
M(SettingFloat, max_streams_to_max_threads_ratio, 1, "Allows you to use more sources than the number of threads - to more evenly distribute work across threads. It is assumed that this is a temporary solution, since it will be possible in the future to make the number of sources equal to the number of threads, but for each source to dynamically select available work for itself.") \
M(SettingFloat, max_streams_multiplier_for_merge_tables, 5, "Ask more streams when reading from Merge table. Streams will be spread across tables that Merge table will use. This allows more even distribution of work across threads and especially helpful when merged tables differ in size.") \
M(SettingFloat, max_streams_to_max_threads_ratio, 1, "Allows you to use more sources than the number of threads - to more evenly distribute work across threads. It is assumed that this is a temporary solution, since it will be possible in the future to make the number of sources equal to the number of threads, but for each source to dynamically select available work for itself.", 0) \
M(SettingFloat, max_streams_multiplier_for_merge_tables, 5, "Ask more streams when reading from Merge table. Streams will be spread across tables that Merge table will use. This allows more even distribution of work across threads and especially helpful when merged tables differ in size.", 0) \
\
M(SettingString, network_compression_method, "LZ4", "Allows you to select the method of data compression when writing.") \
M(SettingString, network_compression_method, "LZ4", "Allows you to select the method of data compression when writing.", 0) \
\
M(SettingInt64, network_zstd_compression_level, 1, "Allows you to select the level of ZSTD compression.") \
M(SettingInt64, network_zstd_compression_level, 1, "Allows you to select the level of ZSTD compression.", 0) \
\
M(SettingUInt64, priority, 0, "Priority of the query. 1 - the highest, higher value - lower priority; 0 - do not use priorities.") \
M(SettingInt64, os_thread_priority, 0, "If non zero - set corresponding 'nice' value for query processing threads. Can be used to adjust query priority for OS scheduler.") \
M(SettingUInt64, priority, 0, "Priority of the query. 1 - the highest, higher value - lower priority; 0 - do not use priorities.", 0) \
M(SettingInt64, os_thread_priority, 0, "If non zero - set corresponding 'nice' value for query processing threads. Can be used to adjust query priority for OS scheduler.", 0) \
\
M(SettingBool, log_queries, 0, "Log requests and write the log to the system table.") \
M(SettingBool, log_queries, 0, "Log requests and write the log to the system table.", 0) \
\
M(SettingUInt64, log_queries_cut_to_length, 100000, "If query length is greater than specified threshold (in bytes), then cut query when writing to query log. Also limit length of printed query in ordinary text log.") \
M(SettingUInt64, log_queries_cut_to_length, 100000, "If query length is greater than specified threshold (in bytes), then cut query when writing to query log. Also limit length of printed query in ordinary text log.", 0) \
\
M(SettingDistributedProductMode, distributed_product_mode, DistributedProductMode::DENY, "How are distributed subqueries performed inside IN or JOIN sections?") \
M(SettingDistributedProductMode, distributed_product_mode, DistributedProductMode::DENY, "How are distributed subqueries performed inside IN or JOIN sections?", 0) \
\
M(SettingUInt64, max_concurrent_queries_for_user, 0, "The maximum number of concurrent requests per user.") \
M(SettingUInt64, max_concurrent_queries_for_user, 0, "The maximum number of concurrent requests per user.", 0) \
\
M(SettingBool, insert_deduplicate, true, "For INSERT queries in the replicated table, specifies that deduplication of insertings blocks should be preformed") \
M(SettingBool, insert_deduplicate, true, "For INSERT queries in the replicated table, specifies that deduplication of insertings blocks should be preformed", 0) \
\
M(SettingUInt64, insert_quorum, 0, "For INSERT queries in the replicated table, wait writing for the specified number of replicas and linearize the addition of the data. 0 - disabled.") \
M(SettingMilliseconds, insert_quorum_timeout, 600000, "") \
M(SettingUInt64, select_sequential_consistency, 0, "For SELECT queries from the replicated table, throw an exception if the replica does not have a chunk written with the quorum; do not read the parts that have not yet been written with the quorum.") \
M(SettingUInt64, table_function_remote_max_addresses, 1000, "The maximum number of different shards and the maximum number of replicas of one shard in the `remote` function.") \
M(SettingMilliseconds, read_backoff_min_latency_ms, 1000, "Setting to reduce the number of threads in case of slow reads. Pay attention only to reads that took at least that much time.") \
M(SettingUInt64, read_backoff_max_throughput, 1048576, "Settings to reduce the number of threads in case of slow reads. Count events when the read bandwidth is less than that many bytes per second.") \
M(SettingMilliseconds, read_backoff_min_interval_between_events_ms, 1000, "Settings to reduce the number of threads in case of slow reads. Do not pay attention to the event, if the previous one has passed less than a certain amount of time.") \
M(SettingUInt64, read_backoff_min_events, 2, "Settings to reduce the number of threads in case of slow reads. The number of events after which the number of threads will be reduced.") \
M(SettingUInt64, insert_quorum, 0, "For INSERT queries in the replicated table, wait writing for the specified number of replicas and linearize the addition of the data. 0 - disabled.", 0) \
M(SettingMilliseconds, insert_quorum_timeout, 600000, "", 0) \
M(SettingUInt64, select_sequential_consistency, 0, "For SELECT queries from the replicated table, throw an exception if the replica does not have a chunk written with the quorum; do not read the parts that have not yet been written with the quorum.", 0) \
M(SettingUInt64, table_function_remote_max_addresses, 1000, "The maximum number of different shards and the maximum number of replicas of one shard in the `remote` function.", 0) \
M(SettingMilliseconds, read_backoff_min_latency_ms, 1000, "Setting to reduce the number of threads in case of slow reads. Pay attention only to reads that took at least that much time.", 0) \
M(SettingUInt64, read_backoff_max_throughput, 1048576, "Settings to reduce the number of threads in case of slow reads. Count events when the read bandwidth is less than that many bytes per second.", 0) \
M(SettingMilliseconds, read_backoff_min_interval_between_events_ms, 1000, "Settings to reduce the number of threads in case of slow reads. Do not pay attention to the event, if the previous one has passed less than a certain amount of time.", 0) \
M(SettingUInt64, read_backoff_min_events, 2, "Settings to reduce the number of threads in case of slow reads. The number of events after which the number of threads will be reduced.", 0) \
\
M(SettingFloat, memory_tracker_fault_probability, 0., "For testing of `exception safety` - throw an exception every time you allocate memory with the specified probability.") \
M(SettingFloat, memory_tracker_fault_probability, 0., "For testing of `exception safety` - throw an exception every time you allocate memory with the specified probability.", 0) \
\
M(SettingBool, enable_http_compression, 0, "Compress the result if the client over HTTP said that it understands data compressed by gzip or deflate.") \
M(SettingInt64, http_zlib_compression_level, 3, "Compression level - used if the client on HTTP said that it understands data compressed by gzip or deflate.") \
M(SettingBool, enable_http_compression, 0, "Compress the result if the client over HTTP said that it understands data compressed by gzip or deflate.", 0) \
M(SettingInt64, http_zlib_compression_level, 3, "Compression level - used if the client on HTTP said that it understands data compressed by gzip or deflate.", 0) \
\
M(SettingBool, http_native_compression_disable_checksumming_on_decompress, 0, "If you uncompress the POST data from the client compressed by the native format, do not check the checksum.") \
M(SettingBool, http_native_compression_disable_checksumming_on_decompress, 0, "If you uncompress the POST data from the client compressed by the native format, do not check the checksum.", 0) \
\
M(SettingString, count_distinct_implementation, "uniqExact", "What aggregate function to use for implementation of count(DISTINCT ...)") \
M(SettingString, count_distinct_implementation, "uniqExact", "What aggregate function to use for implementation of count(DISTINCT ...)", 0) \
\
M(SettingBool, output_format_write_statistics, true, "Write statistics about read rows, bytes, time elapsed in suitable output formats.") \
M(SettingBool, output_format_write_statistics, true, "Write statistics about read rows, bytes, time elapsed in suitable output formats.", 0) \
\
M(SettingBool, add_http_cors_header, false, "Write add http CORS header.") \
M(SettingBool, add_http_cors_header, false, "Write add http CORS header.", 0) \
\
M(SettingUInt64, max_http_get_redirects, 0, "Max number of http GET redirects hops allowed. Make sure additional security measures are in place to prevent a malicious server to redirect your requests to unexpected services.") \
M(SettingUInt64, max_http_get_redirects, 0, "Max number of http GET redirects hops allowed. Make sure additional security measures are in place to prevent a malicious server to redirect your requests to unexpected services.", 0) \
\
M(SettingBool, input_format_skip_unknown_fields, false, "Skip columns with unknown names from input data (it works for JSONEachRow, CSVWithNames, TSVWithNames and TSKV formats).") \
M(SettingBool, input_format_with_names_use_header, false, "For TSVWithNames and CSVWithNames input formats this controls whether format parser is to assume that column data appear in the input exactly as they are specified in the header.") \
M(SettingBool, input_format_import_nested_json, false, "Map nested JSON data to nested tables (it works for JSONEachRow format).") \
M(SettingBool, input_format_defaults_for_omitted_fields, true, "For input data calculate default expressions for omitted fields (it works for JSONEachRow, CSV and TSV formats).") \
M(SettingBool, input_format_tsv_empty_as_default, false, "Treat empty fields in TSV input as default values.") \
M(SettingBool, input_format_null_as_default, false, "For text input formats initialize null fields with default values if data type of this field is not nullable") \
M(SettingBool, input_format_skip_unknown_fields, false, "Skip columns with unknown names from input data (it works for JSONEachRow, CSVWithNames, TSVWithNames and TSKV formats).", 0) \
M(SettingBool, input_format_with_names_use_header, false, "For TSVWithNames and CSVWithNames input formats this controls whether format parser is to assume that column data appear in the input exactly as they are specified in the header.", 0) \
M(SettingBool, input_format_import_nested_json, false, "Map nested JSON data to nested tables (it works for JSONEachRow format).", 0) \
M(SettingBool, input_format_defaults_for_omitted_fields, true, "For input data calculate default expressions for omitted fields (it works for JSONEachRow, CSV and TSV formats).", 0) \
M(SettingBool, input_format_tsv_empty_as_default, false, "Treat empty fields in TSV input as default values.", 0) \
M(SettingBool, input_format_null_as_default, false, "For text input formats initialize null fields with default values if data type of this field is not nullable", 0) \
\
M(SettingBool, input_format_values_interpret_expressions, true, "For Values format: if field could not be parsed by streaming parser, run SQL parser and try to interpret it as SQL expression.") \
M(SettingBool, input_format_values_deduce_templates_of_expressions, false, "For Values format: if field could not be parsed by streaming parser, run SQL parser, deduce template of the SQL expression, try to parse all rows using template and then interpret expression for all rows.") \
M(SettingBool, input_format_values_accurate_types_of_literals, true, "For Values format: when parsing and interpreting expressions using template, check actual type of literal to avoid possible overflow and precision issues.") \
M(SettingBool, input_format_values_interpret_expressions, true, "For Values format: if field could not be parsed by streaming parser, run SQL parser and try to interpret it as SQL expression.", 0) \
M(SettingBool, input_format_values_deduce_templates_of_expressions, false, "For Values format: if field could not be parsed by streaming parser, run SQL parser, deduce template of the SQL expression, try to parse all rows using template and then interpret expression for all rows.", 0) \
M(SettingBool, input_format_values_accurate_types_of_literals, true, "For Values format: when parsing and interpreting expressions using template, check actual type of literal to avoid possible overflow and precision issues.", 0) \
\
M(SettingBool, output_format_json_quote_64bit_integers, true, "Controls quoting of 64-bit integers in JSON output format.") \
M(SettingBool, output_format_json_quote_64bit_integers, true, "Controls quoting of 64-bit integers in JSON output format.", 0) \
\
M(SettingBool, output_format_json_quote_denormals, false, "Enables '+nan', '-nan', '+inf', '-inf' outputs in JSON output format.") \
M(SettingBool, output_format_json_quote_denormals, false, "Enables '+nan', '-nan', '+inf', '-inf' outputs in JSON output format.", 0) \
\
M(SettingBool, output_format_json_escape_forward_slashes, true, "Controls escaping forward slashes for string outputs in JSON output format. This is intended for compatibility with JavaScript. Don't confuse with backslashes that are always escaped.") \
M(SettingBool, output_format_json_escape_forward_slashes, true, "Controls escaping forward slashes for string outputs in JSON output format. This is intended for compatibility with JavaScript. Don't confuse with backslashes that are always escaped.", 0) \
\
M(SettingUInt64, output_format_pretty_max_rows, 10000, "Rows limit for Pretty formats.") \
M(SettingUInt64, output_format_pretty_max_column_pad_width, 250, "Maximum width to pad all values in a column in Pretty formats.") \
M(SettingBool, output_format_pretty_color, true, "Use ANSI escape sequences to paint colors in Pretty formats") \
M(SettingUInt64, output_format_parquet_row_group_size, 1000000, "Row group size in rows.") \
M(SettingUInt64, output_format_pretty_max_rows, 10000, "Rows limit for Pretty formats.", 0) \
M(SettingUInt64, output_format_pretty_max_column_pad_width, 250, "Maximum width to pad all values in a column in Pretty formats.", 0) \
M(SettingBool, output_format_pretty_color, true, "Use ANSI escape sequences to paint colors in Pretty formats", 0) \
M(SettingUInt64, output_format_parquet_row_group_size, 1000000, "Row group size in rows.", 0) \
\
M(SettingBool, use_client_time_zone, false, "Use client timezone for interpreting DateTime string values, instead of adopting server timezone.") \
M(SettingBool, use_client_time_zone, false, "Use client timezone for interpreting DateTime string values, instead of adopting server timezone.", 0) \
\
M(SettingBool, send_progress_in_http_headers, false, "Send progress notifications using X-ClickHouse-Progress headers. Some clients do not support high amount of HTTP headers (Python requests in particular), so it is disabled by default.") \
M(SettingBool, send_progress_in_http_headers, false, "Send progress notifications using X-ClickHouse-Progress headers. Some clients do not support high amount of HTTP headers (Python requests in particular), so it is disabled by default.", 0) \
\
M(SettingUInt64, http_headers_progress_interval_ms, 100, "Do not send HTTP headers X-ClickHouse-Progress more frequently than at each specified interval.") \
M(SettingUInt64, http_headers_progress_interval_ms, 100, "Do not send HTTP headers X-ClickHouse-Progress more frequently than at each specified interval.", 0) \
\
M(SettingBool, fsync_metadata, 1, "Do fsync after changing metadata for tables and databases (.sql files). Could be disabled in case of poor latency on server with high load of DDL queries and high load of disk subsystem.") \
M(SettingBool, fsync_metadata, 1, "Do fsync after changing metadata for tables and databases (.sql files). Could be disabled in case of poor latency on server with high load of DDL queries and high load of disk subsystem.", 0) \
\
M(SettingUInt64, input_format_allow_errors_num, 0, "Maximum absolute amount of errors while reading text formats (like CSV, TSV). In case of error, if at least absolute or relative amount of errors is lower than corresponding value, will skip until next line and continue.") \
M(SettingFloat, input_format_allow_errors_ratio, 0, "Maximum relative amount of errors while reading text formats (like CSV, TSV). In case of error, if at least absolute or relative amount of errors is lower than corresponding value, will skip until next line and continue.") \
M(SettingUInt64, input_format_allow_errors_num, 0, "Maximum absolute amount of errors while reading text formats (like CSV, TSV). In case of error, if at least absolute or relative amount of errors is lower than corresponding value, will skip until next line and continue.", 0) \
M(SettingFloat, input_format_allow_errors_ratio, 0, "Maximum relative amount of errors while reading text formats (like CSV, TSV). In case of error, if at least absolute or relative amount of errors is lower than corresponding value, will skip until next line and continue.", 0) \
\
M(SettingBool, join_use_nulls, 0, "Use NULLs for non-joined rows of outer JOINs for types that can be inside Nullable. If false, use default value of corresponding columns data type.") \
M(SettingBool, join_use_nulls, 0, "Use NULLs for non-joined rows of outer JOINs for types that can be inside Nullable. If false, use default value of corresponding columns data type.", 0) \
\
M(SettingJoinStrictness, join_default_strictness, JoinStrictness::ALL, "Set default strictness in JOIN query. Possible values: empty string, 'ANY', 'ALL'. If empty, query without strictness will throw exception.") \
M(SettingBool, any_join_distinct_right_table_keys, false, "Enable old ANY JOIN logic with many-to-one left-to-right table keys mapping for all ANY JOINs. It leads to confusing not equal results for 't1 ANY LEFT JOIN t2' and 't2 ANY RIGHT JOIN t1'. ANY RIGHT JOIN needs one-to-many keys maping to be consistent with LEFT one.") \
M(SettingJoinStrictness, join_default_strictness, JoinStrictness::ALL, "Set default strictness in JOIN query. Possible values: empty string, 'ANY', 'ALL'. If empty, query without strictness will throw exception.", 0) \
M(SettingBool, any_join_distinct_right_table_keys, false, "Enable old ANY JOIN logic with many-to-one left-to-right table keys mapping for all ANY JOINs. It leads to confusing not equal results for 't1 ANY LEFT JOIN t2' and 't2 ANY RIGHT JOIN t1'. ANY RIGHT JOIN needs one-to-many keys maping to be consistent with LEFT one.", 0) \
\
M(SettingUInt64, preferred_block_size_bytes, 1000000, "") \
M(SettingUInt64, preferred_block_size_bytes, 1000000, "", 0) \
\
M(SettingUInt64, max_replica_delay_for_distributed_queries, 300, "If set, distributed queries of Replicated tables will choose servers with replication delay in seconds less than the specified value (not inclusive). Zero means do not take delay into account.") \
M(SettingBool, fallback_to_stale_replicas_for_distributed_queries, 1, "Suppose max_replica_delay_for_distributed_queries is set and all replicas for the queried table are stale. If this setting is enabled, the query will be performed anyway, otherwise the error will be reported.") \
M(SettingUInt64, preferred_max_column_in_block_size_bytes, 0, "Limit on max column size in block while reading. Helps to decrease cache misses count. Should be close to L2 cache size.") \
M(SettingUInt64, max_replica_delay_for_distributed_queries, 300, "If set, distributed queries of Replicated tables will choose servers with replication delay in seconds less than the specified value (not inclusive). Zero means do not take delay into account.", 0) \
M(SettingBool, fallback_to_stale_replicas_for_distributed_queries, 1, "Suppose max_replica_delay_for_distributed_queries is set and all replicas for the queried table are stale. If this setting is enabled, the query will be performed anyway, otherwise the error will be reported.", 0) \
M(SettingUInt64, preferred_max_column_in_block_size_bytes, 0, "Limit on max column size in block while reading. Helps to decrease cache misses count. Should be close to L2 cache size.", 0) \
\
M(SettingBool, insert_distributed_sync, false, "If setting is enabled, insert query into distributed waits until data will be sent to all nodes in cluster.") \
M(SettingUInt64, insert_distributed_timeout, 0, "Timeout for insert query into distributed. Setting is used only with insert_distributed_sync enabled. Zero value means no timeout.") \
M(SettingInt64, distributed_ddl_task_timeout, 180, "Timeout for DDL query responses from all hosts in cluster. If a ddl request has not been performed on all hosts, a response will contain a timeout error and a request will be executed in an async mode. Negative value means infinite.") \
M(SettingMilliseconds, stream_flush_interval_ms, 7500, "Timeout for flushing data from streaming storages.") \
M(SettingMilliseconds, stream_poll_timeout_ms, 500, "Timeout for polling data from/to streaming storages.") \
M(SettingBool, insert_distributed_sync, false, "If setting is enabled, insert query into distributed waits until data will be sent to all nodes in cluster.", 0) \
M(SettingUInt64, insert_distributed_timeout, 0, "Timeout for insert query into distributed. Setting is used only with insert_distributed_sync enabled. Zero value means no timeout.", 0) \
M(SettingInt64, distributed_ddl_task_timeout, 180, "Timeout for DDL query responses from all hosts in cluster. If a ddl request has not been performed on all hosts, a response will contain a timeout error and a request will be executed in an async mode. Negative value means infinite.", 0) \
M(SettingMilliseconds, stream_flush_interval_ms, 7500, "Timeout for flushing data from streaming storages.", 0) \
M(SettingMilliseconds, stream_poll_timeout_ms, 500, "Timeout for polling data from/to streaming storages.", 0) \
\
M(SettingString, format_schema, "", "Schema identifier (used by schema-based formats)") \
M(SettingString, format_template_resultset, "", "Path to file which contains format string for result set (for Template format)") \
M(SettingString, format_template_row, "", "Path to file which contains format string for rows (for Template format)") \
M(SettingString, format_template_rows_between_delimiter, "\n", "Delimiter between rows (for Template format)") \
M(SettingString, format_schema, "", "Schema identifier (used by schema-based formats)", 0) \
M(SettingString, format_template_resultset, "", "Path to file which contains format string for result set (for Template format)", 0) \
M(SettingString, format_template_row, "", "Path to file which contains format string for rows (for Template format)", 0) \
M(SettingString, format_template_rows_between_delimiter, "\n", "Delimiter between rows (for Template format)", 0) \
\
M(SettingString, format_custom_escaping_rule, "Escaped", "Field escaping rule (for CustomSeparated format)") \
M(SettingString, format_custom_field_delimiter, "\t", "Delimiter between fields (for CustomSeparated format)") \
M(SettingString, format_custom_row_before_delimiter, "", "Delimiter before field of the first column (for CustomSeparated format)") \
M(SettingString, format_custom_row_after_delimiter, "\n", "Delimiter after field of the last column (for CustomSeparated format)") \
M(SettingString, format_custom_row_between_delimiter, "", "Delimiter between rows (for CustomSeparated format)") \
M(SettingString, format_custom_result_before_delimiter, "", "Prefix before result set (for CustomSeparated format)") \
M(SettingString, format_custom_result_after_delimiter, "", "Suffix after result set (for CustomSeparated format)") \
M(SettingString, format_custom_escaping_rule, "Escaped", "Field escaping rule (for CustomSeparated format)", 0) \
M(SettingString, format_custom_field_delimiter, "\t", "Delimiter between fields (for CustomSeparated format)", 0) \
M(SettingString, format_custom_row_before_delimiter, "", "Delimiter before field of the first column (for CustomSeparated format)", 0) \
M(SettingString, format_custom_row_after_delimiter, "\n", "Delimiter after field of the last column (for CustomSeparated format)", 0) \
M(SettingString, format_custom_row_between_delimiter, "", "Delimiter between rows (for CustomSeparated format)", 0) \
M(SettingString, format_custom_result_before_delimiter, "", "Prefix before result set (for CustomSeparated format)", 0) \
M(SettingString, format_custom_result_after_delimiter, "", "Suffix after result set (for CustomSeparated format)", 0) \
\
M(SettingBool, insert_allow_materialized_columns, 0, "If setting is enabled, Allow materialized columns in INSERT.") \
M(SettingSeconds, http_connection_timeout, DEFAULT_HTTP_READ_BUFFER_CONNECTION_TIMEOUT, "HTTP connection timeout.") \
M(SettingSeconds, http_send_timeout, DEFAULT_HTTP_READ_BUFFER_TIMEOUT, "HTTP send timeout") \
M(SettingSeconds, http_receive_timeout, DEFAULT_HTTP_READ_BUFFER_TIMEOUT, "HTTP receive timeout") \
M(SettingBool, optimize_throw_if_noop, false, "If setting is enabled and OPTIMIZE query didn't actually assign a merge then an explanatory exception is thrown") \
M(SettingBool, use_index_for_in_with_subqueries, true, "Try using an index if there is a subquery or a table expression on the right side of the IN operator.") \
M(SettingBool, joined_subquery_requires_alias, false, "Force joined subqueries to have aliases for correct name qualification.") \
M(SettingBool, empty_result_for_aggregation_by_empty_set, false, "Return empty result when aggregating without keys on empty set.") \
M(SettingBool, allow_distributed_ddl, true, "If it is set to true, then a user is allowed to executed distributed DDL queries.") \
M(SettingUInt64, odbc_max_field_size, 1024, "Max size of filed can be read from ODBC dictionary. Long strings are truncated.") \
M(SettingUInt64, query_profiler_real_time_period_ns, 1000000000, "Highly experimental. Period for real clock timer of query profiler (in nanoseconds). Set 0 value to turn off real clock query profiler. Recommended value is at least 10000000 (100 times a second) for single queries or 1000000000 (once a second) for cluster-wide profiling.") \
M(SettingUInt64, query_profiler_cpu_time_period_ns, 1000000000, "Highly experimental. Period for CPU clock timer of query profiler (in nanoseconds). Set 0 value to turn off CPU clock query profiler. Recommended value is at least 10000000 (100 times a second) for single queries or 1000000000 (once a second) for cluster-wide profiling.") \
M(SettingBool, insert_allow_materialized_columns, 0, "If setting is enabled, Allow materialized columns in INSERT.", 0) \
M(SettingSeconds, http_connection_timeout, DEFAULT_HTTP_READ_BUFFER_CONNECTION_TIMEOUT, "HTTP connection timeout.", 0) \
M(SettingSeconds, http_send_timeout, DEFAULT_HTTP_READ_BUFFER_TIMEOUT, "HTTP send timeout", 0) \
M(SettingSeconds, http_receive_timeout, DEFAULT_HTTP_READ_BUFFER_TIMEOUT, "HTTP receive timeout", 0) \
M(SettingBool, optimize_throw_if_noop, false, "If setting is enabled and OPTIMIZE query didn't actually assign a merge then an explanatory exception is thrown", 0) \
M(SettingBool, use_index_for_in_with_subqueries, true, "Try using an index if there is a subquery or a table expression on the right side of the IN operator.", 0) \
M(SettingBool, joined_subquery_requires_alias, false, "Force joined subqueries to have aliases for correct name qualification.", 0) \
M(SettingBool, empty_result_for_aggregation_by_empty_set, false, "Return empty result when aggregating without keys on empty set.", 0) \
M(SettingBool, allow_distributed_ddl, true, "If it is set to true, then a user is allowed to executed distributed DDL queries.", 0) \
M(SettingUInt64, odbc_max_field_size, 1024, "Max size of filed can be read from ODBC dictionary. Long strings are truncated.", 0) \
M(SettingUInt64, query_profiler_real_time_period_ns, 1000000000, "Highly experimental. Period for real clock timer of query profiler (in nanoseconds). Set 0 value to turn off real clock query profiler. Recommended value is at least 10000000 (100 times a second) for single queries or 1000000000 (once a second) for cluster-wide profiling.", 0) \
M(SettingUInt64, query_profiler_cpu_time_period_ns, 1000000000, "Highly experimental. Period for CPU clock timer of query profiler (in nanoseconds). Set 0 value to turn off CPU clock query profiler. Recommended value is at least 10000000 (100 times a second) for single queries or 1000000000 (once a second) for cluster-wide profiling.", 0) \
\
\
/** Limits during query execution are part of the settings. \
@ -257,135 +260,135 @@ struct Settings : public SettingsCollection<Settings>
* Almost all limits apply to each stream individually. \
*/ \
\
M(SettingUInt64, max_rows_to_read, 0, "Limit on read rows from the most 'deep' sources. That is, only in the deepest subquery. When reading from a remote server, it is only checked on a remote server.") \
M(SettingUInt64, max_bytes_to_read, 0, "Limit on read bytes (after decompression) from the most 'deep' sources. That is, only in the deepest subquery. When reading from a remote server, it is only checked on a remote server.") \
M(SettingOverflowMode, read_overflow_mode, OverflowMode::THROW, "What to do when the limit is exceeded.") \
M(SettingUInt64, max_rows_to_read, 0, "Limit on read rows from the most 'deep' sources. That is, only in the deepest subquery. When reading from a remote server, it is only checked on a remote server.", 0) \
M(SettingUInt64, max_bytes_to_read, 0, "Limit on read bytes (after decompression) from the most 'deep' sources. That is, only in the deepest subquery. When reading from a remote server, it is only checked on a remote server.", 0) \
M(SettingOverflowMode, read_overflow_mode, OverflowMode::THROW, "What to do when the limit is exceeded.", 0) \
\
M(SettingUInt64, max_rows_to_group_by, 0, "") \
M(SettingOverflowModeGroupBy, group_by_overflow_mode, OverflowMode::THROW, "What to do when the limit is exceeded.") \
M(SettingUInt64, max_bytes_before_external_group_by, 0, "") \
M(SettingUInt64, max_rows_to_group_by, 0, "", 0) \
M(SettingOverflowModeGroupBy, group_by_overflow_mode, OverflowMode::THROW, "What to do when the limit is exceeded.", 0) \
M(SettingUInt64, max_bytes_before_external_group_by, 0, "", 0) \
\
M(SettingUInt64, max_rows_to_sort, 0, "") \
M(SettingUInt64, max_bytes_to_sort, 0, "") \
M(SettingOverflowMode, sort_overflow_mode, OverflowMode::THROW, "What to do when the limit is exceeded.") \
M(SettingUInt64, max_bytes_before_external_sort, 0, "") \
M(SettingUInt64, max_bytes_before_remerge_sort, 1000000000, "In case of ORDER BY with LIMIT, when memory usage is higher than specified threshold, perform additional steps of merging blocks before final merge to keep just top LIMIT rows.") \
M(SettingUInt64, max_rows_to_sort, 0, "", 0) \
M(SettingUInt64, max_bytes_to_sort, 0, "", 0) \
M(SettingOverflowMode, sort_overflow_mode, OverflowMode::THROW, "What to do when the limit is exceeded.", 0) \
M(SettingUInt64, max_bytes_before_external_sort, 0, "", 0) \
M(SettingUInt64, max_bytes_before_remerge_sort, 1000000000, "In case of ORDER BY with LIMIT, when memory usage is higher than specified threshold, perform additional steps of merging blocks before final merge to keep just top LIMIT rows.", 0) \
\
M(SettingUInt64, max_result_rows, 0, "Limit on result size in rows. Also checked for intermediate data sent from remote servers.") \
M(SettingUInt64, max_result_bytes, 0, "Limit on result size in bytes (uncompressed). Also checked for intermediate data sent from remote servers.") \
M(SettingOverflowMode, result_overflow_mode, OverflowMode::THROW, "What to do when the limit is exceeded.") \
M(SettingUInt64, max_result_rows, 0, "Limit on result size in rows. Also checked for intermediate data sent from remote servers.", 0) \
M(SettingUInt64, max_result_bytes, 0, "Limit on result size in bytes (uncompressed). Also checked for intermediate data sent from remote servers.", 0) \
M(SettingOverflowMode, result_overflow_mode, OverflowMode::THROW, "What to do when the limit is exceeded.", 0) \
\
/* TODO: Check also when merging and finalizing aggregate functions. */ \
M(SettingSeconds, max_execution_time, 0, "") \
M(SettingOverflowMode, timeout_overflow_mode, OverflowMode::THROW, "What to do when the limit is exceeded.") \
M(SettingSeconds, max_execution_time, 0, "", 0) \
M(SettingOverflowMode, timeout_overflow_mode, OverflowMode::THROW, "What to do when the limit is exceeded.", 0) \
\
M(SettingUInt64, min_execution_speed, 0, "Minimum number of execution rows per second.") \
M(SettingUInt64, max_execution_speed, 0, "Maximum number of execution rows per second.") \
M(SettingUInt64, min_execution_speed_bytes, 0, "Minimum number of execution bytes per second.") \
M(SettingUInt64, max_execution_speed_bytes, 0, "Maximum number of execution bytes per second.") \
M(SettingSeconds, timeout_before_checking_execution_speed, 0, "Check that the speed is not too low after the specified time has elapsed.") \
M(SettingUInt64, min_execution_speed, 0, "Minimum number of execution rows per second.", 0) \
M(SettingUInt64, max_execution_speed, 0, "Maximum number of execution rows per second.", 0) \
M(SettingUInt64, min_execution_speed_bytes, 0, "Minimum number of execution bytes per second.", 0) \
M(SettingUInt64, max_execution_speed_bytes, 0, "Maximum number of execution bytes per second.", 0) \
M(SettingSeconds, timeout_before_checking_execution_speed, 0, "Check that the speed is not too low after the specified time has elapsed.", 0) \
\
M(SettingUInt64, max_columns_to_read, 0, "") \
M(SettingUInt64, max_temporary_columns, 0, "") \
M(SettingUInt64, max_temporary_non_const_columns, 0, "") \
M(SettingUInt64, max_columns_to_read, 0, "", 0) \
M(SettingUInt64, max_temporary_columns, 0, "", 0) \
M(SettingUInt64, max_temporary_non_const_columns, 0, "", 0) \
\
M(SettingUInt64, max_subquery_depth, 100, "") \
M(SettingUInt64, max_pipeline_depth, 1000, "") \
M(SettingUInt64, max_ast_depth, 1000, "Maximum depth of query syntax tree. Checked after parsing.") \
M(SettingUInt64, max_ast_elements, 50000, "Maximum size of query syntax tree in number of nodes. Checked after parsing.") \
M(SettingUInt64, max_expanded_ast_elements, 500000, "Maximum size of query syntax tree in number of nodes after expansion of aliases and the asterisk.") \
M(SettingUInt64, max_subquery_depth, 100, "", 0) \
M(SettingUInt64, max_pipeline_depth, 1000, "", 0) \
M(SettingUInt64, max_ast_depth, 1000, "Maximum depth of query syntax tree. Checked after parsing.", 0) \
M(SettingUInt64, max_ast_elements, 50000, "Maximum size of query syntax tree in number of nodes. Checked after parsing.", 0) \
M(SettingUInt64, max_expanded_ast_elements, 500000, "Maximum size of query syntax tree in number of nodes after expansion of aliases and the asterisk.", 0) \
\
M(SettingUInt64, readonly, 0, "0 - everything is allowed. 1 - only read requests. 2 - only read requests, as well as changing settings, except for the 'readonly' setting.") \
M(SettingUInt64, readonly, 0, "0 - everything is allowed. 1 - only read requests. 2 - only read requests, as well as changing settings, except for the 'readonly' setting.", 0) \
\
M(SettingUInt64, max_rows_in_set, 0, "Maximum size of the set (in number of elements) resulting from the execution of the IN section.") \
M(SettingUInt64, max_bytes_in_set, 0, "Maximum size of the set (in bytes in memory) resulting from the execution of the IN section.") \
M(SettingOverflowMode, set_overflow_mode, OverflowMode::THROW, "What to do when the limit is exceeded.") \
M(SettingUInt64, max_rows_in_set, 0, "Maximum size of the set (in number of elements) resulting from the execution of the IN section.", 0) \
M(SettingUInt64, max_bytes_in_set, 0, "Maximum size of the set (in bytes in memory) resulting from the execution of the IN section.", 0) \
M(SettingOverflowMode, set_overflow_mode, OverflowMode::THROW, "What to do when the limit is exceeded.", 0) \
\
M(SettingUInt64, max_rows_in_join, 0, "Maximum size of the hash table for JOIN (in number of rows).") \
M(SettingUInt64, max_bytes_in_join, 0, "Maximum size of the hash table for JOIN (in number of bytes in memory).") \
M(SettingOverflowMode, join_overflow_mode, OverflowMode::THROW, "What to do when the limit is exceeded.") \
M(SettingBool, join_any_take_last_row, false, "When disabled (default) ANY JOIN will take the first found row for a key. When enabled, it will take the last row seen if there are multiple rows for the same key.") \
M(SettingBool, partial_merge_join, false, "Use partial merge join instead of hash join for LEFT and INNER JOINs.") \
M(SettingBool, partial_merge_join_optimizations, false, "Enable optimizations in partial merge join") \
M(SettingUInt64, default_max_bytes_in_join, 100000000, "Maximum size of right-side table if limit's required but max_bytes_in_join is not set.") \
M(SettingUInt64, partial_merge_join_rows_in_right_blocks, 10000, "Split right-hand joining data in blocks of specified size. It's a portion of data indexed by min-max values and possibly unloaded on disk.") \
M(SettingUInt64, partial_merge_join_rows_in_left_blocks, 10000, "Group left-hand joining data in bigger blocks. Setting it to a bigger value increase JOIN performance and memory usage.") \
M(SettingUInt64, max_rows_in_join, 0, "Maximum size of the hash table for JOIN (in number of rows).", 0) \
M(SettingUInt64, max_bytes_in_join, 0, "Maximum size of the hash table for JOIN (in number of bytes in memory).", 0) \
M(SettingOverflowMode, join_overflow_mode, OverflowMode::THROW, "What to do when the limit is exceeded.", 0) \
M(SettingBool, join_any_take_last_row, false, "When disabled (default) ANY JOIN will take the first found row for a key. When enabled, it will take the last row seen if there are multiple rows for the same key.", 0) \
M(SettingBool, partial_merge_join, false, "Use partial merge join instead of hash join for LEFT and INNER JOINs.", 0) \
M(SettingBool, partial_merge_join_optimizations, false, "Enable optimizations in partial merge join", 0) \
M(SettingUInt64, default_max_bytes_in_join, 100000000, "Maximum size of right-side table if limit's required but max_bytes_in_join is not set.", 0) \
M(SettingUInt64, partial_merge_join_rows_in_right_blocks, 10000, "Split right-hand joining data in blocks of specified size. It's a portion of data indexed by min-max values and possibly unloaded on disk.", 0) \
M(SettingUInt64, partial_merge_join_rows_in_left_blocks, 10000, "Group left-hand joining data in bigger blocks. Setting it to a bigger value increase JOIN performance and memory usage.", 0) \
\
M(SettingUInt64, max_rows_to_transfer, 0, "Maximum size (in rows) of the transmitted external table obtained when the GLOBAL IN/JOIN section is executed.") \
M(SettingUInt64, max_bytes_to_transfer, 0, "Maximum size (in uncompressed bytes) of the transmitted external table obtained when the GLOBAL IN/JOIN section is executed.") \
M(SettingOverflowMode, transfer_overflow_mode, OverflowMode::THROW, "What to do when the limit is exceeded.") \
M(SettingUInt64, max_rows_to_transfer, 0, "Maximum size (in rows) of the transmitted external table obtained when the GLOBAL IN/JOIN section is executed.", 0) \
M(SettingUInt64, max_bytes_to_transfer, 0, "Maximum size (in uncompressed bytes) of the transmitted external table obtained when the GLOBAL IN/JOIN section is executed.", 0) \
M(SettingOverflowMode, transfer_overflow_mode, OverflowMode::THROW, "What to do when the limit is exceeded.", 0) \
\
M(SettingUInt64, max_rows_in_distinct, 0, "Maximum number of elements during execution of DISTINCT.") \
M(SettingUInt64, max_bytes_in_distinct, 0, "Maximum total size of state (in uncompressed bytes) in memory for the execution of DISTINCT.") \
M(SettingOverflowMode, distinct_overflow_mode, OverflowMode::THROW, "What to do when the limit is exceeded.") \
M(SettingUInt64, max_rows_in_distinct, 0, "Maximum number of elements during execution of DISTINCT.", 0) \
M(SettingUInt64, max_bytes_in_distinct, 0, "Maximum total size of state (in uncompressed bytes) in memory for the execution of DISTINCT.", 0) \
M(SettingOverflowMode, distinct_overflow_mode, OverflowMode::THROW, "What to do when the limit is exceeded.", 0) \
\
M(SettingUInt64, max_memory_usage, 0, "Maximum memory usage for processing of single query. Zero means unlimited.") \
M(SettingUInt64, max_memory_usage_for_user, 0, "Maximum memory usage for processing all concurrently running queries for the user. Zero means unlimited.") \
M(SettingUInt64, max_memory_usage_for_all_queries, 0, "Maximum memory usage for processing all concurrently running queries on the server. Zero means unlimited.") \
M(SettingUInt64, max_memory_usage, 0, "Maximum memory usage for processing of single query. Zero means unlimited.", 0) \
M(SettingUInt64, max_memory_usage_for_user, 0, "Maximum memory usage for processing all concurrently running queries for the user. Zero means unlimited.", 0) \
M(SettingUInt64, max_memory_usage_for_all_queries, 0, "Maximum memory usage for processing all concurrently running queries on the server. Zero means unlimited.", 0) \
\
M(SettingUInt64, max_network_bandwidth, 0, "The maximum speed of data exchange over the network in bytes per second for a query. Zero means unlimited.") \
M(SettingUInt64, max_network_bytes, 0, "The maximum number of bytes (compressed) to receive or transmit over the network for execution of the query.") \
M(SettingUInt64, max_network_bandwidth_for_user, 0, "The maximum speed of data exchange over the network in bytes per second for all concurrently running user queries. Zero means unlimited.")\
M(SettingUInt64, max_network_bandwidth_for_all_users, 0, "The maximum speed of data exchange over the network in bytes per second for all concurrently running queries. Zero means unlimited.") \
M(SettingChar, format_csv_delimiter, ',', "The character to be considered as a delimiter in CSV data. If setting with a string, a string has to have a length of 1.") \
M(SettingBool, format_csv_allow_single_quotes, 1, "If it is set to true, allow strings in single quotes.") \
M(SettingBool, format_csv_allow_double_quotes, 1, "If it is set to true, allow strings in double quotes.") \
M(SettingBool, input_format_csv_unquoted_null_literal_as_null, false, "Consider unquoted NULL literal as \\N") \
M(SettingUInt64, max_network_bandwidth, 0, "The maximum speed of data exchange over the network in bytes per second for a query. Zero means unlimited.", 0) \
M(SettingUInt64, max_network_bytes, 0, "The maximum number of bytes (compressed) to receive or transmit over the network for execution of the query.", 0) \
M(SettingUInt64, max_network_bandwidth_for_user, 0, "The maximum speed of data exchange over the network in bytes per second for all concurrently running user queries. Zero means unlimited.", 0)\
M(SettingUInt64, max_network_bandwidth_for_all_users, 0, "The maximum speed of data exchange over the network in bytes per second for all concurrently running queries. Zero means unlimited.", 0) \
M(SettingChar, format_csv_delimiter, ',', "The character to be considered as a delimiter in CSV data. If setting with a string, a string has to have a length of 1.", 0) \
M(SettingBool, format_csv_allow_single_quotes, 1, "If it is set to true, allow strings in single quotes.", 0) \
M(SettingBool, format_csv_allow_double_quotes, 1, "If it is set to true, allow strings in double quotes.", 0) \
M(SettingBool, input_format_csv_unquoted_null_literal_as_null, false, "Consider unquoted NULL literal as \\N", 0) \
\
M(SettingDateTimeInputFormat, date_time_input_format, FormatSettings::DateTimeInputFormat::Basic, "Method to read DateTime from text input formats. Possible values: 'basic' and 'best_effort'.") \
M(SettingBool, log_profile_events, true, "Log query performance statistics into the query_log and query_thread_log.") \
M(SettingBool, log_query_settings, true, "Log query settings into the query_log.") \
M(SettingBool, log_query_threads, true, "Log query threads into system.query_thread_log table. This setting have effect only when 'log_queries' is true.") \
M(SettingLogsLevel, send_logs_level, LogsLevel::none, "Send server text logs with specified minimum level to client. Valid values: 'trace', 'debug', 'information', 'warning', 'error', 'none'") \
M(SettingBool, enable_optimize_predicate_expression, 1, "If it is set to true, optimize predicates to subqueries.") \
M(SettingBool, enable_optimize_predicate_expression_to_final_subquery, 1, "Allow push predicate to final subquery.") \
M(SettingDateTimeInputFormat, date_time_input_format, FormatSettings::DateTimeInputFormat::Basic, "Method to read DateTime from text input formats. Possible values: 'basic' and 'best_effort'.", 0) \
M(SettingBool, log_profile_events, true, "Log query performance statistics into the query_log and query_thread_log.", 0) \
M(SettingBool, log_query_settings, true, "Log query settings into the query_log.", 0) \
M(SettingBool, log_query_threads, true, "Log query threads into system.query_thread_log table. This setting have effect only when 'log_queries' is true.", 0) \
M(SettingLogsLevel, send_logs_level, LogsLevel::none, "Send server text logs with specified minimum level to client. Valid values: 'trace', 'debug', 'information', 'warning', 'error', 'none'", 0) \
M(SettingBool, enable_optimize_predicate_expression, 1, "If it is set to true, optimize predicates to subqueries.", 0) \
M(SettingBool, enable_optimize_predicate_expression_to_final_subquery, 1, "Allow push predicate to final subquery.", 0) \
\
M(SettingUInt64, low_cardinality_max_dictionary_size, 8192, "Maximum size (in rows) of shared global dictionary for LowCardinality type.") \
M(SettingBool, low_cardinality_use_single_dictionary_for_part, false, "LowCardinality type serialization setting. If is true, than will use additional keys when global dictionary overflows. Otherwise, will create several shared dictionaries.") \
M(SettingBool, decimal_check_overflow, true, "Check overflow of decimal arithmetic/comparison operations") \
M(SettingUInt64, low_cardinality_max_dictionary_size, 8192, "Maximum size (in rows) of shared global dictionary for LowCardinality type.", 0) \
M(SettingBool, low_cardinality_use_single_dictionary_for_part, false, "LowCardinality type serialization setting. If is true, than will use additional keys when global dictionary overflows. Otherwise, will create several shared dictionaries.", 0) \
M(SettingBool, decimal_check_overflow, true, "Check overflow of decimal arithmetic/comparison operations", 0) \
\
M(SettingBool, prefer_localhost_replica, 1, "1 - always send query to local replica, if it exists. 0 - choose replica to send query between local and remote ones according to load_balancing") \
M(SettingUInt64, max_fetch_partition_retries_count, 5, "Amount of retries while fetching partition from another host.") \
M(SettingUInt64, http_max_multipart_form_data_size, 1024 * 1024 * 1024, "Limit on size of multipart/form-data content. This setting cannot be parsed from URL parameters and should be set in user profile. Note that content is parsed and external tables are created in memory before start of query execution. And this is the only limit that has effect on that stage (limits on max memory usage and max execution time have no effect while reading HTTP form data).") \
M(SettingBool, calculate_text_stack_trace, 1, "Calculate text stack trace in case of exceptions during query execution. This is the default. It requires symbol lookups that may slow down fuzzing tests when huge amount of wrong queries are executed. In normal cases you should not disable this option.") \
M(SettingBool, allow_ddl, true, "If it is set to true, then a user is allowed to executed DDL queries.") \
M(SettingBool, parallel_view_processing, false, "Enables pushing to attached views concurrently instead of sequentially.") \
M(SettingBool, enable_debug_queries, false, "Enables debug queries such as AST.") \
M(SettingBool, enable_unaligned_array_join, false, "Allow ARRAY JOIN with multiple arrays that have different sizes. When this settings is enabled, arrays will be resized to the longest one.") \
M(SettingBool, optimize_read_in_order, true, "Enable ORDER BY optimization for reading data in corresponding order in MergeTree tables.") \
M(SettingBool, low_cardinality_allow_in_native_format, true, "Use LowCardinality type in Native format. Otherwise, convert LowCardinality columns to ordinary for select query, and convert ordinary columns to required LowCardinality for insert query.") \
M(SettingBool, allow_experimental_multiple_joins_emulation, true, "Emulate multiple joins using subselects") \
M(SettingBool, allow_experimental_cross_to_join_conversion, true, "Convert CROSS JOIN to INNER JOIN if possible") \
M(SettingBool, cancel_http_readonly_queries_on_client_close, false, "Cancel HTTP readonly queries when a client closes the connection without waiting for response.") \
M(SettingBool, external_table_functions_use_nulls, true, "If it is set to true, external table functions will implicitly use Nullable type if needed. Otherwise NULLs will be substituted with default values. Currently supported only by 'mysql' and 'odbc' table functions.") \
M(SettingBool, allow_experimental_data_skipping_indices, false, "If it is set to true, data skipping indices can be used in CREATE TABLE/ALTER TABLE queries.") \
M(SettingBool, prefer_localhost_replica, 1, "1 - always send query to local replica, if it exists. 0 - choose replica to send query between local and remote ones according to load_balancing", 0) \
M(SettingUInt64, max_fetch_partition_retries_count, 5, "Amount of retries while fetching partition from another host.", 0) \
M(SettingUInt64, http_max_multipart_form_data_size, 1024 * 1024 * 1024, "Limit on size of multipart/form-data content. This setting cannot be parsed from URL parameters and should be set in user profile. Note that content is parsed and external tables are created in memory before start of query execution. And this is the only limit that has effect on that stage (limits on max memory usage and max execution time have no effect while reading HTTP form data).", 0) \
M(SettingBool, calculate_text_stack_trace, 1, "Calculate text stack trace in case of exceptions during query execution. This is the default. It requires symbol lookups that may slow down fuzzing tests when huge amount of wrong queries are executed. In normal cases you should not disable this option.", 0) \
M(SettingBool, allow_ddl, true, "If it is set to true, then a user is allowed to executed DDL queries.", 0) \
M(SettingBool, parallel_view_processing, false, "Enables pushing to attached views concurrently instead of sequentially.", 0) \
M(SettingBool, enable_debug_queries, false, "Enables debug queries such as AST.", 0) \
M(SettingBool, enable_unaligned_array_join, false, "Allow ARRAY JOIN with multiple arrays that have different sizes. When this settings is enabled, arrays will be resized to the longest one.", 0) \
M(SettingBool, optimize_read_in_order, true, "Enable ORDER BY optimization for reading data in corresponding order in MergeTree tables.", 0) \
M(SettingBool, low_cardinality_allow_in_native_format, true, "Use LowCardinality type in Native format. Otherwise, convert LowCardinality columns to ordinary for select query, and convert ordinary columns to required LowCardinality for insert query.", 0) \
M(SettingBool, allow_experimental_multiple_joins_emulation, true, "Emulate multiple joins using subselects", 0) \
M(SettingBool, allow_experimental_cross_to_join_conversion, true, "Convert CROSS JOIN to INNER JOIN if possible", 0) \
M(SettingBool, cancel_http_readonly_queries_on_client_close, false, "Cancel HTTP readonly queries when a client closes the connection without waiting for response.", 0) \
M(SettingBool, external_table_functions_use_nulls, true, "If it is set to true, external table functions will implicitly use Nullable type if needed. Otherwise NULLs will be substituted with default values. Currently supported only by 'mysql' and 'odbc' table functions.", 0) \
M(SettingBool, allow_experimental_data_skipping_indices, false, "If it is set to true, data skipping indices can be used in CREATE TABLE/ALTER TABLE queries.", 0) \
\
M(SettingBool, experimental_use_processors, false, "Use processors pipeline.") \
M(SettingBool, experimental_use_processors, false, "Use processors pipeline.", 0) \
\
M(SettingBool, allow_hyperscan, true, "Allow functions that use Hyperscan library. Disable to avoid potentially long compilation times and excessive resource usage.") \
M(SettingBool, allow_simdjson, true, "Allow using simdjson library in 'JSON*' functions if AVX2 instructions are available. If disabled rapidjson will be used.") \
M(SettingBool, allow_introspection_functions, false, "Allow functions for introspection of ELF and DWARF for query profiling. These functions are slow and may impose security considerations.") \
M(SettingBool, allow_hyperscan, true, "Allow functions that use Hyperscan library. Disable to avoid potentially long compilation times and excessive resource usage.", 0) \
M(SettingBool, allow_simdjson, true, "Allow using simdjson library in 'JSON*' functions if AVX2 instructions are available. If disabled rapidjson will be used.", 0) \
M(SettingBool, allow_introspection_functions, false, "Allow functions for introspection of ELF and DWARF for query profiling. These functions are slow and may impose security considerations.", 0) \
\
M(SettingUInt64, max_partitions_per_insert_block, 100, "Limit maximum number of partitions in single INSERTed block. Zero means unlimited. Throw exception if the block contains too many partitions. This setting is a safety threshold, because using large number of partitions is a common misconception.") \
M(SettingBool, check_query_single_value_result, true, "Return check query result as single 1/0 value") \
M(SettingBool, allow_drop_detached, false, "Allow ALTER TABLE ... DROP DETACHED PART[ITION] ... queries") \
M(SettingUInt64, max_partitions_per_insert_block, 100, "Limit maximum number of partitions in single INSERTed block. Zero means unlimited. Throw exception if the block contains too many partitions. This setting is a safety threshold, because using large number of partitions is a common misconception.", 0) \
M(SettingBool, check_query_single_value_result, true, "Return check query result as single 1/0 value", 0) \
M(SettingBool, allow_drop_detached, false, "Allow ALTER TABLE ... DROP DETACHED PART[ITION] ... queries", 0) \
\
M(SettingSeconds, distributed_replica_error_half_life, DBMS_CONNECTION_POOL_WITH_FAILOVER_DEFAULT_DECREASE_ERROR_PERIOD, "Time period reduces replica error counter by 2 times.") \
M(SettingUInt64, distributed_replica_error_cap, DBMS_CONNECTION_POOL_WITH_FAILOVER_MAX_ERROR_COUNT, "Max number of errors per replica, prevents piling up increadible amount of errors if replica was offline for some time and allows it to be reconsidered in a shorter amount of time.") \
M(SettingSeconds, distributed_replica_error_half_life, DBMS_CONNECTION_POOL_WITH_FAILOVER_DEFAULT_DECREASE_ERROR_PERIOD, "Time period reduces replica error counter by 2 times.", 0) \
M(SettingUInt64, distributed_replica_error_cap, DBMS_CONNECTION_POOL_WITH_FAILOVER_MAX_ERROR_COUNT, "Max number of errors per replica, prevents piling up increadible amount of errors if replica was offline for some time and allows it to be reconsidered in a shorter amount of time.", 0) \
\
M(SettingBool, allow_experimental_live_view, false, "Enable LIVE VIEW. Not mature enough.") \
M(SettingSeconds, live_view_heartbeat_interval, DEFAULT_LIVE_VIEW_HEARTBEAT_INTERVAL_SEC, "The heartbeat interval in seconds to indicate live query is alive.") \
M(SettingSeconds, temporary_live_view_timeout, DEFAULT_TEMPORARY_LIVE_VIEW_TIMEOUT_SEC, "Timeout after which temporary live view is deleted.") \
M(SettingUInt64, max_live_view_insert_blocks_before_refresh, 64, "Limit maximum number of inserted blocks after which mergeable blocks are dropped and query is re-executed.") \
M(SettingUInt64, min_free_disk_space_for_temporary_data, 0, "The minimum disk space to keep while writing temporary data used in external sorting and aggregation.") \
M(SettingBool, allow_experimental_live_view, false, "Enable LIVE VIEW. Not mature enough.", 0) \
M(SettingSeconds, live_view_heartbeat_interval, DEFAULT_LIVE_VIEW_HEARTBEAT_INTERVAL_SEC, "The heartbeat interval in seconds to indicate live query is alive.", 0) \
M(SettingSeconds, temporary_live_view_timeout, DEFAULT_TEMPORARY_LIVE_VIEW_TIMEOUT_SEC, "Timeout after which temporary live view is deleted.", 0) \
M(SettingUInt64, max_live_view_insert_blocks_before_refresh, 64, "Limit maximum number of inserted blocks after which mergeable blocks are dropped and query is re-executed.", 0) \
M(SettingUInt64, min_free_disk_space_for_temporary_data, 0, "The minimum disk space to keep while writing temporary data used in external sorting and aggregation.", 0) \
\
M(SettingBool, enable_scalar_subquery_optimization, true, "If it is set to true, prevent scalar subqueries from (de)serializing large scalar values and possibly avoid running the same subquery more than once.") \
M(SettingBool, optimize_trivial_count_query, true, "Process trivial 'SELECT count() FROM table' query from metadata.") \
M(SettingBool, enable_scalar_subquery_optimization, true, "If it is set to true, prevent scalar subqueries from (de)serializing large scalar values and possibly avoid running the same subquery more than once.", 0) \
M(SettingBool, optimize_trivial_count_query, true, "Process trivial 'SELECT count() FROM table' query from metadata.", 0) \
\
/** Obsolete settings that do nothing but left for compatibility reasons. Remove each one after half a year of obsolescence. */ \
\
M(SettingBool, allow_experimental_low_cardinality_type, true, "Obsolete setting, does nothing. Will be removed after 2019-08-13") \
M(SettingBool, compile, false, "Whether query compilation is enabled. Will be removed after 2020-03-13") \
M(SettingBool, allow_experimental_low_cardinality_type, true, "Obsolete setting, does nothing. Will be removed after 2019-08-13", 0) \
M(SettingBool, compile, false, "Whether query compilation is enabled. Will be removed after 2020-03-13", 0) \
DECLARE_SETTINGS_COLLECTION(LIST_OF_SETTINGS)

121
dbms/src/Core/SettingsCommon.cpp → dbms/src/Core/SettingsCollection.cpp
View File

@ -1,17 +1,17 @@
#include "SettingsCommon.h"
#include <Core/SettingsCollection.h>
#include <Core/SettingsCollectionImpl.h>
#include <Core/Field.h>
#include <Common/getNumberOfPhysicalCPUCores.h>
#include <Common/FieldVisitors.h>
#include <common/logger_useful.h>
#include <IO/ReadHelpers.h>
#include <IO/ReadBufferFromString.h>
#include <IO/WriteHelpers.h>
namespace DB
{
namespace ErrorCodes
{
extern const int TYPE_MISMATCH;
@ -90,8 +90,14 @@ void SettingNumber<bool>::set(const String & x)
}
template <typename Type>
void SettingNumber<Type>::serialize(WriteBuffer & buf) const
void SettingNumber<Type>::serialize(WriteBuffer & buf, SettingsBinaryFormat format) const
{
if (format >= SettingsBinaryFormat::STRINGS)
{
writeStringBinary(toString(), buf);
return;
}
if constexpr (is_integral_v<Type> && is_unsigned_v<Type>)
writeVarUInt(static_cast<UInt64>(value), buf);
else if constexpr (is_integral_v<Type> && is_signed_v<Type>)
@ -99,13 +105,21 @@ void SettingNumber<Type>::serialize(WriteBuffer & buf) const
else
{
static_assert(std::is_floating_point_v<Type>);
writeBinary(toString(), buf);
writeStringBinary(toString(), buf);
}
}
template <typename Type>
void SettingNumber<Type>::deserialize(ReadBuffer & buf)
void SettingNumber<Type>::deserialize(ReadBuffer & buf, SettingsBinaryFormat format)
{
if (format >= SettingsBinaryFormat::STRINGS)
{
String x;
readStringBinary(x, buf);
set(x);
return;
}
if constexpr (is_integral_v<Type> && is_unsigned_v<Type>)
{
UInt64 x;
@ -122,7 +136,7 @@ void SettingNumber<Type>::deserialize(ReadBuffer & buf)
{
static_assert(std::is_floating_point_v<Type>);
String x;
readBinary(x, buf);
readStringBinary(x, buf);
set(x);
}
}
@ -167,13 +181,27 @@ void SettingMaxThreads::set(const String & x)
set(parse<UInt64>(x));
}
void SettingMaxThreads::serialize(WriteBuffer & buf) const
void SettingMaxThreads::serialize(WriteBuffer & buf, SettingsBinaryFormat format) const
{
if (format >= SettingsBinaryFormat::STRINGS)
{
writeStringBinary(is_auto ? "auto" : DB::toString(value), buf);
return;
}
writeVarUInt(is_auto ? 0 : value, buf);
}
void SettingMaxThreads::deserialize(ReadBuffer & buf)
void SettingMaxThreads::deserialize(ReadBuffer & buf, SettingsBinaryFormat format)
{
if (format >= SettingsBinaryFormat::STRINGS)
{
String x;
readStringBinary(x, buf);
set(x);
return;
}
UInt64 x = 0;
readVarUInt(x, buf);
set(x);
@ -233,14 +261,28 @@ void SettingTimespan<io_unit>::set(const String & x)
}
template <SettingTimespanIO io_unit>
void SettingTimespan<io_unit>::serialize(WriteBuffer & buf) const
void SettingTimespan<io_unit>::serialize(WriteBuffer & buf, SettingsBinaryFormat format) const
{
if (format >= SettingsBinaryFormat::STRINGS)
{
writeStringBinary(toString(), buf);
return;
}
writeVarUInt(value.totalMicroseconds() / microseconds_per_io_unit, buf);
}
template <SettingTimespanIO io_unit>
void SettingTimespan<io_unit>::deserialize(ReadBuffer & buf)
void SettingTimespan<io_unit>::deserialize(ReadBuffer & buf, SettingsBinaryFormat format)
{
if (format >= SettingsBinaryFormat::STRINGS)
{
String x;
readStringBinary(x, buf);
set(x);
return;
}
UInt64 x = 0;
readVarUInt(x, buf);
set(x);
@ -271,15 +313,15 @@ void SettingString::set(const Field & x)
set(safeGet<const String &>(x));
}
void SettingString::serialize(WriteBuffer & buf) const
void SettingString::serialize(WriteBuffer & buf, SettingsBinaryFormat) const
{
writeBinary(value, buf);
writeStringBinary(value, buf);
}
void SettingString::deserialize(ReadBuffer & buf)
void SettingString::deserialize(ReadBuffer & buf, SettingsBinaryFormat)
{
String s;
readBinary(s, buf);
readStringBinary(s, buf);
set(s);
}
@ -314,30 +356,30 @@ void SettingChar::set(const Field & x)
set(s);
}
void SettingChar::serialize(WriteBuffer & buf) const
void SettingChar::serialize(WriteBuffer & buf, SettingsBinaryFormat) const
{
writeBinary(toString(), buf);
writeStringBinary(toString(), buf);
}
void SettingChar::deserialize(ReadBuffer & buf)
void SettingChar::deserialize(ReadBuffer & buf, SettingsBinaryFormat)
{
String s;
readBinary(s, buf);
readStringBinary(s, buf);
set(s);
}
template <typename EnumType, typename Tag>
void SettingEnum<EnumType, Tag>::serialize(WriteBuffer & buf) const
void SettingEnum<EnumType, Tag>::serialize(WriteBuffer & buf, SettingsBinaryFormat) const
{
writeBinary(toString(), buf);
writeStringBinary(toString(), buf);
}
template <typename EnumType, typename Tag>
void SettingEnum<EnumType, Tag>::deserialize(ReadBuffer & buf)
void SettingEnum<EnumType, Tag>::deserialize(ReadBuffer & buf, SettingsBinaryFormat)
{
String s;
readBinary(s, buf);
readStringBinary(s, buf);
set(s);
}
@ -462,14 +504,43 @@ IMPLEMENT_SETTING_ENUM(LogsLevel, LOGS_LEVEL_LIST_OF_NAMES, ErrorCodes::BAD_ARGU
namespace details
{
void SettingsCollectionUtils::serializeName(const StringRef & name, WriteBuffer & buf)
{
writeStringBinary(name, buf);
}
String SettingsCollectionUtils::deserializeName(ReadBuffer & buf)
{
String name;
readBinary(name, buf);
readStringBinary(name, buf);
return name;
}
void SettingsCollectionUtils::serializeName(const StringRef & name, WriteBuffer & buf) { writeBinary(name, buf); }
void SettingsCollectionUtils::serializeFlag(bool flag, WriteBuffer & buf)
{
buf.write(flag);
}
bool SettingsCollectionUtils::deserializeFlag(ReadBuffer & buf)
{
char c;
buf.readStrict(c);
return c;
}
void SettingsCollectionUtils::skipValue(ReadBuffer & buf)
{
/// Ignore a string written by the function writeStringBinary().
UInt64 size;
readVarUInt(size, buf);
buf.ignore(size);
}
void SettingsCollectionUtils::warningNameNotFound(const StringRef & name)
{
static auto * log = &Logger::get("Settings");
LOG_WARNING(log, "Unknown setting " << name << ", skipping");
}
void SettingsCollectionUtils::throwNameNotFound(const StringRef & name)
{

236
dbms/src/Core/SettingsCommon.h → dbms/src/Core/SettingsCollection.h
View File

@ -6,7 +6,6 @@
#include <common/StringRef.h>
#include <Core/Types.h>
#include <unordered_map>
#include <boost/noncopyable.hpp>
namespace DB
@ -17,6 +16,8 @@ struct SettingChange;
using SettingsChanges = std::vector<SettingChange>;
class ReadBuffer;
class WriteBuffer;
enum class SettingsBinaryFormat;
/** One setting for any type.
* Stores a value within itself, as well as a flag - whether the value was changed.
@ -51,10 +52,10 @@ struct SettingNumber
void set(const String & x);
/// Serialize to binary stream suitable for transfer over network.
void serialize(WriteBuffer & buf) const;
void serialize(WriteBuffer & buf, SettingsBinaryFormat format) const;
/// Read from binary stream.
void deserialize(ReadBuffer & buf);
void deserialize(ReadBuffer & buf, SettingsBinaryFormat format);
};
using SettingUInt64 = SettingNumber<UInt64>;
@ -85,8 +86,8 @@ struct SettingMaxThreads
void set(const Field & x);
void set(const String & x);
void serialize(WriteBuffer & buf) const;
void deserialize(ReadBuffer & buf);
void serialize(WriteBuffer & buf, SettingsBinaryFormat format) const;
void deserialize(ReadBuffer & buf, SettingsBinaryFormat format);
void setAuto();
UInt64 getAutoValue() const;
@ -118,8 +119,8 @@ struct SettingTimespan
void set(const Field & x);
void set(const String & x);
void serialize(WriteBuffer & buf) const;
void deserialize(ReadBuffer & buf);
void serialize(WriteBuffer & buf, SettingsBinaryFormat format) const;
void deserialize(ReadBuffer & buf, SettingsBinaryFormat format);
static constexpr UInt64 microseconds_per_io_unit = (io_unit == SettingTimespanIO::MILLISECOND) ? 1000 : 1000000;
};
@ -144,8 +145,8 @@ struct SettingString
void set(const String & x);
void set(const Field & x);
void serialize(WriteBuffer & buf) const;
void deserialize(ReadBuffer & buf);
void serialize(WriteBuffer & buf, SettingsBinaryFormat format) const;
void deserialize(ReadBuffer & buf, SettingsBinaryFormat format);
};
@ -167,8 +168,8 @@ public:
void set(const String & x);
void set(const Field & x);
void serialize(WriteBuffer & buf) const;
void deserialize(ReadBuffer & buf);
void serialize(WriteBuffer & buf, SettingsBinaryFormat format) const;
void deserialize(ReadBuffer & buf, SettingsBinaryFormat format);
};
@ -191,8 +192,8 @@ struct SettingEnum
void set(const Field & x);
void set(const String & x);
void serialize(WriteBuffer & buf) const;
void deserialize(ReadBuffer & buf);
void serialize(WriteBuffer & buf, SettingsBinaryFormat format) const;
void deserialize(ReadBuffer & buf, SettingsBinaryFormat format);
};
@ -269,15 +270,12 @@ enum class LogsLevel
using SettingLogsLevel = SettingEnum<LogsLevel>;
namespace details
enum class SettingsBinaryFormat
{
struct SettingsCollectionUtils
{
static void serializeName(const StringRef & name, WriteBuffer & buf);
static String deserializeName(ReadBuffer & buf);
[[noreturn]] static void throwNameNotFound(const StringRef & name);
};
}
OLD, /// Part of the settings are serialized as strings, and other part as varints. This is the old behaviour.
STRINGS, /// All settings are serialized as strings. Before each value the flag `is_ignorable` is serialized.
DEFAULT = STRINGS,
};
/** Template class to define collections of settings.
@ -287,9 +285,9 @@ namespace details
* struct MySettings : public SettingsCollection<MySettings>
* {
* # define APPLY_FOR_MYSETTINGS(M) \
* M(SettingUInt64, a, 100, "Description of a") \
* M(SettingFloat, f, 3.11, "Description of f") \
* M(SettingString, s, "default", "Description of s")
* M(SettingUInt64, a, 100, "Description of a", 0) \
* M(SettingFloat, f, 3.11, "Description of f", IGNORABLE) // IGNORABLE - means the setting can be ignored by older versions) \
* M(SettingString, s, "default", "Description of s", 0)
*
* DECLARE_SETTINGS_COLLECTION(MySettings, APPLY_FOR_MYSETTINGS)
* };
@ -304,21 +302,22 @@ private:
Derived & castToDerived() { return *static_cast<Derived *>(this); }
const Derived & castToDerived() const { return *static_cast<const Derived *>(this); }
using IsChangedFunction = bool (*)(const Derived &);
using GetStringFunction = String (*)(const Derived &);
using GetFieldFunction = Field (*)(const Derived &);
using SetStringFunction = void (*)(Derived &, const String &);
using SetFieldFunction = void (*)(Derived &, const Field &);
using SerializeFunction = void (*)(const Derived &, WriteBuffer & buf);
using DeserializeFunction = void (*)(Derived &, ReadBuffer & buf);
using ValueToStringFunction = String (*)(const Field &);
using ValueToCorrespondingTypeFunction = Field (*)(const Field &);
struct MemberInfo
{
IsChangedFunction is_changed;
using IsChangedFunction = bool (*)(const Derived &);
using GetStringFunction = String (*)(const Derived &);
using GetFieldFunction = Field (*)(const Derived &);
using SetStringFunction = void (*)(Derived &, const String &);
using SetFieldFunction = void (*)(Derived &, const Field &);
using SerializeFunction = void (*)(const Derived &, WriteBuffer & buf, SettingsBinaryFormat);
using DeserializeFunction = void (*)(Derived &, ReadBuffer & buf, SettingsBinaryFormat);
using ValueToStringFunction = String (*)(const Field &);
using ValueToCorrespondingTypeFunction = Field (*)(const Field &);
StringRef name;
StringRef description;
bool is_ignorable;
IsChangedFunction is_changed;
GetStringFunction get_string;
GetFieldFunction get_field;
SetStringFunction set_string;
@ -329,52 +328,22 @@ private:
ValueToCorrespondingTypeFunction value_to_corresponding_type;
};
class MemberInfos : private boost::noncopyable
class MemberInfos
{
public:
static const MemberInfos & instance();
size_t size() const { return infos.size(); }
const MemberInfo & operator[](size_t index) const { return infos[index]; }
const MemberInfo * begin() const { return infos.data(); }
const MemberInfo * end() const { return infos.data() + infos.size(); }
size_t findIndex(const StringRef & name) const
{
auto it = by_name_map.find(name);
if (it == by_name_map.end())
return static_cast<size_t>(-1); // npos
return it->second;
}
size_t findIndexStrict(const StringRef & name) const
{
auto it = by_name_map.find(name);
if (it == by_name_map.end())
details::SettingsCollectionUtils::throwNameNotFound(name);
return it->second;
}
const MemberInfo * find(const StringRef & name) const
{
auto it = by_name_map.find(name);
if (it == by_name_map.end())
return end();
else
return &infos[it->second];
}
const MemberInfo * findStrict(const StringRef & name) const { return &infos[findIndexStrict(name)]; }
private:
MemberInfos();
void add(MemberInfo && member)
{
size_t index = infos.size();
infos.emplace_back(member);
by_name_map.emplace(infos.back().name, index);
}
size_t size() const { return infos.size(); }
const MemberInfo * data() const { return infos.data(); }
const MemberInfo & operator[](size_t index) const { return infos[index]; }
const MemberInfo * find(const StringRef & name) const;
const MemberInfo & findStrict(const StringRef & name) const;
size_t findIndex(const StringRef & name) const;
size_t findIndexStrict(const StringRef & name) const;
private:
void add(MemberInfo && member);
std::vector<MemberInfo> infos;
std::unordered_map<StringRef, size_t> by_name_map;
@ -396,6 +365,7 @@ public:
bool isChanged() const { return member->is_changed(*collection); }
Field getValue() const;
String getValueAsString() const { return member->get_string(*collection); }
protected:
friend class SettingsCollection<Derived>::const_iterator;
const_reference() : collection(nullptr), member(nullptr) {}
@ -410,7 +380,7 @@ public:
public:
reference(Derived & collection_, const MemberInfo & member_) : const_reference(collection_, member_) {}
reference(const const_reference & src) : const_reference(src) {}
void setValue(const Field & value);
void setValue(const Field & value) { this->member->set_field(*const_cast<Derived *>(this->collection), value); }
void setValue(const String & value) { this->member->set_string(*const_cast<Derived *>(this->collection), value); }
};
@ -453,7 +423,7 @@ public:
/// Returns description of a setting.
static StringRef getDescription(size_t index) { return members()[index].description; }
static StringRef getDescription(const String & name) { return members().findStrict(name)->description; }
static StringRef getDescription(const String & name) { return members().findStrict(name).description; }
/// Searches a setting by its name; returns `npos` if not found.
static size_t findIndex(const StringRef & name) { return members().findIndex(name); }
@ -463,36 +433,36 @@ public:
static size_t findIndexStrict(const StringRef & name) { return members().findIndexStrict(name); }
/// Casts a value to a string according to a specified setting without actual changing this settings.
static String valueToString(size_t index, const Field & value);
static String valueToString(const StringRef & name, const Field & value);
static String valueToString(size_t index, const Field & value) { return members()[index].value_to_string(value); }
static String valueToString(const StringRef & name, const Field & value) { return members().findStrict(name).value_to_string(value); }
/// Casts a value to a type according to a specified setting without actual changing this settings.
/// E.g. for SettingInt64 it casts Field to Field::Types::Int64.
static Field valueToCorrespondingType(size_t index, const Field & value);
static Field valueToCorrespondingType(const StringRef & name, const Field & value);
iterator begin() { return iterator(castToDerived(), members().begin()); }
const_iterator begin() const { return const_iterator(castToDerived(), members().begin()); }
iterator end() { return iterator(castToDerived(), members().end()); }
const_iterator end() const { return const_iterator(castToDerived(), members().end()); }
iterator begin() { return iterator(castToDerived(), members().data()); }
const_iterator begin() const { return const_iterator(castToDerived(), members().data()); }
iterator end() { const auto & the_members = members(); return iterator(castToDerived(), the_members.data() + the_members.size()); }
const_iterator end() const { const auto & the_members = members(); return const_iterator(castToDerived(), the_members.data() + the_members.size()); }
/// Returns a proxy object for accessing to a setting. Throws an exception if there is not setting with such name.
reference operator[](size_t index) { return reference(castToDerived(), members()[index]); }
reference operator[](const StringRef & name) { return reference(castToDerived(), *(members().findStrict(name))); }
reference operator[](const StringRef & name) { return reference(castToDerived(), members().findStrict(name)); }
const_reference operator[](size_t index) const { return const_reference(castToDerived(), members()[index]); }
const_reference operator[](const StringRef & name) const { return const_reference(castToDerived(), *(members().findStrict(name))); }
const_reference operator[](const StringRef & name) const { return const_reference(castToDerived(), members().findStrict(name)); }
/// Searches a setting by its name; returns end() if not found.
iterator find(const StringRef & name) { return iterator(castToDerived(), members().find(name)); }
const_iterator find(const StringRef & name) const { return const_iterator(castToDerived(), members().find(name)); }
iterator find(const StringRef & name);
const_iterator find(const StringRef & name) const;
/// Searches a setting by its name; throws an exception if not found.
iterator findStrict(const StringRef & name) { return iterator(castToDerived(), members().findStrict(name)); }
const_iterator findStrict(const StringRef & name) const { return const_iterator(castToDerived(), members().findStrict(name)); }
iterator findStrict(const StringRef & name);
const_iterator findStrict(const StringRef & name) const;
/// Sets setting's value.
void set(size_t index, const Field & value);
void set(const StringRef & name, const Field & value);
void set(size_t index, const Field & value) { (*this)[index].setValue(value); }
void set(const StringRef & name, const Field & value) { (*this)[name].setValue(value); }
/// Sets setting's value. Read value in text form from string (for example, from configuration file or from URL parameter).
void set(size_t index, const String & value) { (*this)[index].setValue(value); }
@ -514,11 +484,7 @@ public:
/// Compares two collections of settings.
bool operator ==(const Derived & rhs) const;
bool operator !=(const Derived & rhs) const
{
return !(*this == rhs);
}
bool operator!=(const Derived & rhs) const { return !(*this == rhs); }
/// Gathers all changed values (e.g. for applying them later to another collection of settings).
SettingsChanges changes() const;
@ -536,82 +502,16 @@ public:
/// Writes the settings to buffer (e.g. to be sent to remote server).
/// Only changed settings are written. They are written as list of contiguous name-value pairs,
/// finished with empty name.
void serialize(WriteBuffer & buf) const
{
for (const auto & member : members())
{
if (member.is_changed(castToDerived()))
{
details::SettingsCollectionUtils::serializeName(member.name, buf);
member.serialize(castToDerived(), buf);
}
}
details::SettingsCollectionUtils::serializeName(StringRef{} /* empty string is a marker of the end of settings */, buf);
}
void serialize(WriteBuffer & buf, SettingsBinaryFormat format = SettingsBinaryFormat::DEFAULT) const;
/// Reads the settings from buffer.
void deserialize(ReadBuffer & buf)
{
const auto & the_members = members();
while (true)
{
String name = details::SettingsCollectionUtils::deserializeName(buf);
if (name.empty() /* empty string is a marker of the end of settings */)
break;
the_members.findStrict(name)->deserialize(castToDerived(), buf);
}
}
void deserialize(ReadBuffer & buf, SettingsBinaryFormat format = SettingsBinaryFormat::DEFAULT);
};
#define DECLARE_SETTINGS_COLLECTION(LIST_OF_SETTINGS_MACRO) \
LIST_OF_SETTINGS_MACRO(DECLARE_SETTINGS_COLLECTION_DECLARE_VARIABLES_HELPER_)
#define IMPLEMENT_SETTINGS_COLLECTION(DERIVED_CLASS_NAME, LIST_OF_SETTINGS_MACRO) \
template<> \
SettingsCollection<DERIVED_CLASS_NAME>::MemberInfos::MemberInfos() \
{ \
using Derived = DERIVED_CLASS_NAME; \
struct Functions \
{ \
LIST_OF_SETTINGS_MACRO(IMPLEMENT_SETTINGS_COLLECTION_DEFINE_FUNCTIONS_HELPER_) \
}; \
LIST_OF_SETTINGS_MACRO(IMPLEMENT_SETTINGS_COLLECTION_ADD_MEMBER_INFO_HELPER_) \
} \
template <> \
const SettingsCollection<DERIVED_CLASS_NAME>::MemberInfos & SettingsCollection<DERIVED_CLASS_NAME>::MemberInfos::instance() \
{ \
static const SettingsCollection<DERIVED_CLASS_NAME>::MemberInfos single_instance; \
return single_instance; \
} \
/** \
* Instantiation should happen when all method definitions from SettingsCollectionImpl.h \
* are accessible, so we instantiate explicitly. \
*/ \
template class SettingsCollection<DERIVED_CLASS_NAME>;
#define DECLARE_SETTINGS_COLLECTION_DECLARE_VARIABLES_HELPER_(TYPE, NAME, DEFAULT, DESCRIPTION) \
#define DECLARE_SETTINGS_COLLECTION_DECLARE_VARIABLES_HELPER_(TYPE, NAME, DEFAULT, DESCRIPTION, FLAGS) \
TYPE NAME {DEFAULT};
#define IMPLEMENT_SETTINGS_COLLECTION_DEFINE_FUNCTIONS_HELPER_(TYPE, NAME, DEFAULT, DESCRIPTION) \
static String NAME##_getString(const Derived & collection) { return collection.NAME.toString(); } \
static Field NAME##_getField(const Derived & collection) { return collection.NAME.toField(); } \
static void NAME##_setString(Derived & collection, const String & value) { collection.NAME.set(value); } \
static void NAME##_setField(Derived & collection, const Field & value) { collection.NAME.set(value); } \
static void NAME##_serialize(const Derived & collection, WriteBuffer & buf) { collection.NAME.serialize(buf); } \
static void NAME##_deserialize(Derived & collection, ReadBuffer & buf) { collection.NAME.deserialize(buf); } \
static String NAME##_valueToString(const Field & value) { TYPE temp{DEFAULT}; temp.set(value); return temp.toString(); } \
static Field NAME##_valueToCorrespondingType(const Field & value) { TYPE temp{DEFAULT}; temp.set(value); return temp.toField(); } \
#define IMPLEMENT_SETTINGS_COLLECTION_ADD_MEMBER_INFO_HELPER_(TYPE, NAME, DEFAULT, DESCRIPTION) \
add({[](const Derived & d) { return d.NAME.changed; }, \
StringRef(#NAME, strlen(#NAME)), StringRef(DESCRIPTION, strlen(DESCRIPTION)), \
&Functions::NAME##_getString, &Functions::NAME##_getField, \
&Functions::NAME##_setString, &Functions::NAME##_setField, \
&Functions::NAME##_serialize, &Functions::NAME##_deserialize, \
&Functions::NAME##_valueToString, &Functions::NAME##_valueToCorrespondingType});
}

245
dbms/src/Core/SettingsCollectionImpl.h
View File

@ -2,15 +2,84 @@
/**
* This file implements some functions that are dependent on Field type.
* Unlinke SettingsCommon.h, we only have to include it once for each
* instantiation of SettingsCollection<>. This allows to work on Field without
* always recompiling the entire project.
* Unlike SettingsCollection.h, we only have to include it once for each
* instantiation of SettingsCollection<>.
*/
#include <Common/SettingsChanges.h>
namespace DB
{
namespace details
{
struct SettingsCollectionUtils
{
static void serializeName(const StringRef & name, WriteBuffer & buf);
static String deserializeName(ReadBuffer & buf);
static void serializeFlag(bool flag, WriteBuffer & buf);
static bool deserializeFlag(ReadBuffer & buf);
static void skipValue(ReadBuffer & buf);
static void warningNameNotFound(const StringRef & name);
[[noreturn]] static void throwNameNotFound(const StringRef & name);
};
}
template <class Derived>
size_t SettingsCollection<Derived>::MemberInfos::findIndex(const StringRef & name) const
{
auto it = by_name_map.find(name);
if (it == by_name_map.end())
return static_cast<size_t>(-1); // npos
return it->second;
}
template <class Derived>
size_t SettingsCollection<Derived>::MemberInfos::findIndexStrict(const StringRef & name) const
{
auto it = by_name_map.find(name);
if (it == by_name_map.end())
details::SettingsCollectionUtils::throwNameNotFound(name);
return it->second;
}
template <class Derived>
const typename SettingsCollection<Derived>::MemberInfo * SettingsCollection<Derived>::MemberInfos::find(const StringRef & name) const
{
auto it = by_name_map.find(name);
if (it == by_name_map.end())
return nullptr;
else
return &infos[it->second];
}
template <class Derived>
const typename SettingsCollection<Derived>::MemberInfo & SettingsCollection<Derived>::MemberInfos::findStrict(const StringRef & name) const
{
return infos[findIndexStrict(name)];
}
template <class Derived>
void SettingsCollection<Derived>::MemberInfos::add(MemberInfo && member)
{
size_t index = infos.size();
infos.emplace_back(member);
by_name_map.emplace(infos.back().name, index);
}
template <class Derived>
const typename SettingsCollection<Derived>::MemberInfos &
SettingsCollection<Derived>::members()
{
static const MemberInfos the_instance;
return the_instance;
}
template <class Derived>
Field SettingsCollection<Derived>::const_reference::getValue() const
@ -18,23 +87,6 @@ Field SettingsCollection<Derived>::const_reference::getValue() const
return member->get_field(*collection);
}
template <class Derived>
void SettingsCollection<Derived>::reference::setValue(const Field & value)
{
this->member->set_field(*const_cast<Derived *>(this->collection), value);
}
template <class Derived>
String SettingsCollection<Derived>::valueToString(size_t index, const Field & value)
{
return members()[index].value_to_string(value);
}
template <class Derived>
String SettingsCollection<Derived>::valueToString(const StringRef & name, const Field & value)
{
return members().findStrict(name)->value_to_string(value);
}
template <class Derived>
Field SettingsCollection<Derived>::valueToCorrespondingType(size_t index, const Field & value)
@ -42,36 +94,62 @@ Field SettingsCollection<Derived>::valueToCorrespondingType(size_t index, const
return members()[index].value_to_corresponding_type(value);
}
template <class Derived>
Field SettingsCollection<Derived>::valueToCorrespondingType(const StringRef & name, const Field & value)
{
return members().findStrict(name)->value_to_corresponding_type(value);
return members().findStrict(name).value_to_corresponding_type(value);
}
template <class Derived>
void SettingsCollection<Derived>::set(size_t index, const Field & value)
{
(*this)[index].setValue(value);
}
template <class Derived>
void SettingsCollection<Derived>::set(const StringRef & name, const Field & value)
typename SettingsCollection<Derived>::iterator SettingsCollection<Derived>::find(const StringRef & name)
{
(*this)[name].setValue(value);
const auto * member = members().find(name);
if (member)
return iterator(castToDerived(), member);
return end();
}
template <class Derived>
typename SettingsCollection<Derived>::const_iterator SettingsCollection<Derived>::find(const StringRef & name) const
{
const auto * member = members().find(name);
if (member)
return const_iterator(castToDerived(), member);
return end();
}
template <class Derived>
typename SettingsCollection<Derived>::iterator SettingsCollection<Derived>::findStrict(const StringRef & name)
{
return iterator(castToDerived(), &members().findStrict(name));
}
template <class Derived>
typename SettingsCollection<Derived>::const_iterator SettingsCollection<Derived>::findStrict(const StringRef & name) const
{
return const_iterator(castToDerived(), &members().findStrict(name));
}
template <class Derived>
Field SettingsCollection<Derived>::get(size_t index) const
{
return (*this)[index].getValue();
}
template <class Derived>
Field SettingsCollection<Derived>::get(const StringRef & name) const
{
return (*this)[name].getValue();
}
template <class Derived>
bool SettingsCollection<Derived>::tryGet(const StringRef & name, Field & value) const
{
@ -82,6 +160,7 @@ bool SettingsCollection<Derived>::tryGet(const StringRef & name, Field & value)
return true;
}
template <class Derived>
bool SettingsCollection<Derived>::tryGet(const StringRef & name, String & value) const
{
@ -92,11 +171,14 @@ bool SettingsCollection<Derived>::tryGet(const StringRef & name, String & value)
return true;
}
template <class Derived>
bool SettingsCollection<Derived>::operator ==(const Derived & rhs) const
{
for (const auto & member : members())
const auto & the_members = members();
for (size_t i = 0; i != the_members.size(); ++i)
{
const auto & member = the_members[i];
bool left_changed = member.is_changed(castToDerived());
bool right_changed = member.is_changed(rhs);
if (left_changed || right_changed)
@ -110,27 +192,29 @@ bool SettingsCollection<Derived>::operator ==(const Derived & rhs) const
return true;
}
/// Gathers all changed values (e.g. for applying them later to another collection of settings).
template <class Derived>
SettingsChanges SettingsCollection<Derived>::changes() const
{
SettingsChanges found_changes;
for (const auto & member : members())
const auto & the_members = members();
for (size_t i = 0; i != the_members.size(); ++i)
{
const auto & member = the_members[i];
if (member.is_changed(castToDerived()))
found_changes.push_back({member.name.toString(), member.get_field(castToDerived())});
}
return found_changes;
}
/// Applies change to concrete setting.
template <class Derived>
void SettingsCollection<Derived>::applyChange(const SettingChange & change)
{
set(change.name, change.value);
}
/// Applies changes to the settings.
template <class Derived>
void SettingsCollection<Derived>::applyChanges(const SettingsChanges & changes)
{
@ -138,25 +222,110 @@ void SettingsCollection<Derived>::applyChanges(const SettingsChanges & changes)
applyChange(change);
}
template <class Derived>
void SettingsCollection<Derived>::copyChangesFrom(const Derived & src)
{
for (const auto & member : members())
const auto & the_members = members();
for (size_t i = 0; i != the_members.size(); ++i)
{
const auto & member = the_members[i];
if (member.is_changed(src))
member.set_field(castToDerived(), member.get_field(src));
}
}
template <class Derived>
void SettingsCollection<Derived>::copyChangesTo(Derived & dest) const
{
dest.copyChangesFrom(castToDerived());
}
template <class Derived>
const typename SettingsCollection<Derived>::MemberInfos &
SettingsCollection<Derived>::members()
void SettingsCollection<Derived>::serialize(WriteBuffer & buf, SettingsBinaryFormat format) const
{
return MemberInfos::instance();
const auto & the_members = members();
for (size_t i = 0; i != the_members.size(); ++i)
{
const auto & member = the_members[i];
if (member.is_changed(castToDerived()))
{
details::SettingsCollectionUtils::serializeName(member.name, buf);
if (format >= SettingsBinaryFormat::STRINGS)
details::SettingsCollectionUtils::serializeFlag(member.is_ignorable, buf);
member.serialize(castToDerived(), buf, format);
}
}
details::SettingsCollectionUtils::serializeName(StringRef{} /* empty string is a marker of the end of settings */, buf);
}
} /* namespace DB */
template <class Derived>
void SettingsCollection<Derived>::deserialize(ReadBuffer & buf, SettingsBinaryFormat format)
{
const auto & the_members = members();
while (true)
{
String name = details::SettingsCollectionUtils::deserializeName(buf);
if (name.empty() /* empty string is a marker of the end of settings */)
break;
auto * member = the_members.find(name);
bool is_ignorable = (format >= SettingsBinaryFormat::STRINGS) ? details::SettingsCollectionUtils::deserializeFlag(buf) : false;
if (member)
{
member->deserialize(castToDerived(), buf, format);
}
else if (is_ignorable)
{
details::SettingsCollectionUtils::warningNameNotFound(name);
details::SettingsCollectionUtils::skipValue(buf);
}
else
details::SettingsCollectionUtils::throwNameNotFound(name);
}
}
//-V:IMPLEMENT_SETTINGS_COLLECTION:501
#define IMPLEMENT_SETTINGS_COLLECTION(DERIVED_CLASS_NAME, LIST_OF_SETTINGS_MACRO) \
template<> \
SettingsCollection<DERIVED_CLASS_NAME>::MemberInfos::MemberInfos() \
{ \
using Derived = DERIVED_CLASS_NAME; \
struct Functions \
{ \
LIST_OF_SETTINGS_MACRO(IMPLEMENT_SETTINGS_COLLECTION_DEFINE_FUNCTIONS_HELPER_) \
}; \
constexpr int IGNORABLE = 1; \
UNUSED(IGNORABLE); \
LIST_OF_SETTINGS_MACRO(IMPLEMENT_SETTINGS_COLLECTION_ADD_MEMBER_INFO_HELPER_) \
} \
/** \
* Instantiation should happen when all method definitions from SettingsCollectionImpl.h \
* are accessible, so we instantiate explicitly. \
*/ \
template class SettingsCollection<DERIVED_CLASS_NAME>;
#define IMPLEMENT_SETTINGS_COLLECTION_DEFINE_FUNCTIONS_HELPER_(TYPE, NAME, DEFAULT, DESCRIPTION, FLAGS) \
static String NAME##_getString(const Derived & collection) { return collection.NAME.toString(); } \
static Field NAME##_getField(const Derived & collection) { return collection.NAME.toField(); } \
static void NAME##_setString(Derived & collection, const String & value) { collection.NAME.set(value); } \
static void NAME##_setField(Derived & collection, const Field & value) { collection.NAME.set(value); } \
static void NAME##_serialize(const Derived & collection, WriteBuffer & buf, SettingsBinaryFormat format) { collection.NAME.serialize(buf, format); } \
static void NAME##_deserialize(Derived & collection, ReadBuffer & buf, SettingsBinaryFormat format) { collection.NAME.deserialize(buf, format); } \
static String NAME##_valueToString(const Field & value) { TYPE temp{DEFAULT}; temp.set(value); return temp.toString(); } \
static Field NAME##_valueToCorrespondingType(const Field & value) { TYPE temp{DEFAULT}; temp.set(value); return temp.toField(); } \
#define IMPLEMENT_SETTINGS_COLLECTION_ADD_MEMBER_INFO_HELPER_(TYPE, NAME, DEFAULT, DESCRIPTION, FLAGS) \
add({StringRef(#NAME, strlen(#NAME)), StringRef(DESCRIPTION, strlen(DESCRIPTION)), \
FLAGS & IGNORABLE, \
[](const Derived & d) { return d.NAME.changed; }, \
&Functions::NAME##_getString, &Functions::NAME##_getField, \
&Functions::NAME##_setString, &Functions::NAME##_setField, \
&Functions::NAME##_serialize, &Functions::NAME##_deserialize, \
&Functions::NAME##_valueToString, &Functions::NAME##_valueToCorrespondingType});
}

5
dbms/src/Core/iostream_debug_helpers.cpp
View File

@ -1,6 +1,7 @@
#include "iostream_debug_helpers.h"
#include <iostream>
#include <Client/Connection.h>
#include <Core/Block.h>
#include <Core/ColumnWithTypeAndName.h>
#include <Core/Field.h>
@ -92,9 +93,9 @@ std::ostream & operator<<(std::ostream & stream, const IColumn & what)
return stream;
}
std::ostream & operator<<(std::ostream & stream, const Connection::Packet & what)
std::ostream & operator<<(std::ostream & stream, const Packet & what)
{
stream << "Connection::Packet("
stream << "Packet("
<< "type = " << what.type;
// types description: Core/Protocol.h
if (what.exception)

6
dbms/src/Core/iostream_debug_helpers.h
View File

@ -1,9 +1,6 @@
#pragma once
#include <iostream>
#include <Client/Connection.h>
namespace DB
{
@ -40,7 +37,8 @@ std::ostream & operator<<(std::ostream & stream, const ColumnWithTypeAndName & w
class IColumn;
std::ostream & operator<<(std::ostream & stream, const IColumn & what);
std::ostream & operator<<(std::ostream & stream, const Connection::Packet & what);
struct Packet;
std::ostream & operator<<(std::ostream & stream, const Packet & what);
struct ExpressionAction;
std::ostream & operator<<(std::ostream & stream, const ExpressionAction & what);

1
dbms/src/DataStreams/IBlockInputStream.h
View File

@ -1,7 +1,6 @@
#pragma once
#include <Core/Block.h>
#include <Core/SettingsCommon.h>
#include <DataStreams/BlockStreamProfileInfo.h>
#include <DataStreams/IBlockStream_fwd.h>
#include <DataStreams/SizeLimits.h>

4
dbms/src/DataStreams/RemoteBlockInputStream.cpp
View File

@ -222,7 +222,7 @@ Block RemoteBlockInputStream::readImpl()
if (isCancelledOrThrowIfKilled())
return Block();
Connection::Packet packet = multiplexed_connections->receivePacket();
Packet packet = multiplexed_connections->receivePacket();
switch (packet.type)
{
@ -301,7 +301,7 @@ void RemoteBlockInputStream::readSuffixImpl()
tryCancel("Cancelling query because enough data has been read");
/// Get the remaining packets so that there is no out of sync in the connections to the replicas.
Connection::Packet packet = multiplexed_connections->drain();
Packet packet = multiplexed_connections->drain();
switch (packet.type)
{
case Protocol::Server::EndOfStream:

6
dbms/src/DataStreams/RemoteBlockOutputStream.cpp
View File

@ -32,7 +32,7 @@ RemoteBlockOutputStream::RemoteBlockOutputStream(Connection & connection_,
while (true)
{
Connection::Packet packet = connection.receivePacket();
Packet packet = connection.receivePacket();
if (Protocol::Server::Data == packet.type)
{
@ -77,7 +77,7 @@ void RemoteBlockOutputStream::write(const Block & block)
auto packet_type = connection.checkPacket();
if (packet_type && *packet_type == Protocol::Server::Exception)
{
Connection::Packet packet = connection.receivePacket();
Packet packet = connection.receivePacket();
packet.exception->rethrow();
}
@ -101,7 +101,7 @@ void RemoteBlockOutputStream::writeSuffix()
/// Wait for EndOfStream or Exception packet, skip Log packets.
while (true)
{
Connection::Packet packet = connection.receivePacket();
Packet packet = connection.receivePacket();
if (Protocol::Server::EndOfStream == packet.type)
break;

2
dbms/src/DataStreams/TotalsHavingBlockInputStream.h
View File

@ -10,7 +10,7 @@ class Arena;
using ArenaPtr = std::shared_ptr<Arena>;
class ExpressionActions;
enum class TotalsMode;
/** Takes blocks after grouping, with non-finalized aggregate functions.
* Calculates total values according to totals_mode.

6
dbms/src/Dictionaries/Embedded/RegionsNames.cpp
View File

@ -19,7 +19,7 @@ RegionsNames::RegionsNames(IRegionsNamesDataProviderPtr data_provider)
{
for (size_t language_id = 0; language_id < SUPPORTED_LANGUAGES_COUNT; ++language_id)
{
const std::string & language = getSupportedLanguages()[language_id];
const std::string & language = supported_languages[language_id];
names_sources[language_id] = data_provider->getLanguageRegionsNamesSource(language);
}
@ -34,7 +34,7 @@ std::string RegionsNames::dumpSupportedLanguagesNames()
if (i > 0)
res += ", ";
res += '\'';
res += getLanguageAliases()[i].name;
res += language_aliases[i].first;
res += '\'';
}
return res;
@ -48,7 +48,7 @@ void RegionsNames::reload()
RegionID max_region_id = 0;
for (size_t language_id = 0; language_id < SUPPORTED_LANGUAGES_COUNT; ++language_id)
{
const std::string & language = getSupportedLanguages()[language_id];
const std::string & language = supported_languages[language_id];
auto names_source = names_sources[language_id];

55
dbms/src/Dictionaries/Embedded/RegionsNames.h
View File

@ -20,7 +20,7 @@
class RegionsNames
{
public:
enum class Language
enum class Language : size_t
{
RU = 0,
EN,
@ -28,36 +28,35 @@ public:
BY,
KZ,
TR,
END
};
private:
static const size_t ROOT_LANGUAGE = 0;
static const size_t SUPPORTED_LANGUAGES_COUNT = 6;
static const size_t LANGUAGE_ALIASES_COUNT = 7;
static const char ** getSupportedLanguages()
static inline constexpr const char * supported_languages[] =
{
static const char * res[]{"ru", "en", "ua", "by", "kz", "tr"};
return res;
}
struct language_alias
{
const char * const name;
const Language lang;
"ru",
"en",
"ua",
"by",
"kz",
"tr"
};
static const language_alias * getLanguageAliases()
{
static constexpr const language_alias language_aliases[]{{"ru", Language::RU},
{"en", Language::EN},
{"ua", Language::UA},
{"uk", Language::UA},
{"by", Language::BY},
{"kz", Language::KZ},
{"tr", Language::TR}};
return language_aliases;
}
static inline constexpr std::pair<const char *, Language> language_aliases[] =
{
{"ru", Language::RU},
{"en", Language::EN},
{"ua", Language::UA},
{"uk", Language::UA},
{"by", Language::BY},
{"kz", Language::KZ},
{"tr", Language::TR}
};
static constexpr size_t ROOT_LANGUAGE = 0;
static constexpr size_t SUPPORTED_LANGUAGES_COUNT = size_t(Language::END);
static constexpr size_t LANGUAGE_ALIASES_COUNT = sizeof(language_aliases);
using NamesSources = std::vector<std::shared_ptr<ILanguageRegionsNamesDataSource>>;
@ -94,9 +93,9 @@ public:
{
for (size_t i = 0; i < LANGUAGE_ALIASES_COUNT; ++i)
{
const auto & alias = getLanguageAliases()[i];
if (language[0] == alias.name[0] && language[1] == alias.name[1])
return alias.lang;
const auto & alias = language_aliases[i];
if (language[0] == alias.first[0] && language[1] == alias.first[1])
return alias.second;
}
}
throw Poco::Exception("Unsupported language for region name. Supported languages are: " + dumpSupportedLanguagesNames() + ".");

1
dbms/src/Dictionaries/readInvalidateQuery.cpp
View File

@ -1,6 +1,7 @@
#include "readInvalidateQuery.h"
#include <DataStreams/IBlockInputStream.h>
#include <IO/WriteBufferFromString.h>
#include <Formats/FormatSettings.h>
namespace DB

200
dbms/src/Functions/array/arrayIntersect.cpp
View File

@ -58,10 +58,19 @@ private:
struct UnpackedArrays
{
size_t base_rows = 0;
std::vector<char> is_const;
std::vector<const NullMap *> null_maps;
std::vector<const ColumnArray::ColumnOffsets::Container *> offsets;
ColumnRawPtrs nested_columns;
struct UnpackedArray
{
bool is_const = false;
const NullMap * null_map = nullptr;
const NullMap * overflow_mask = nullptr;
const ColumnArray::ColumnOffsets::Container * offsets = nullptr;
const IColumn * nested_column = nullptr;
};
std::vector<UnpackedArray> args;
Columns column_holders;
UnpackedArrays() = default;
};
@ -69,9 +78,16 @@ private:
/// Cast column to data_type removing nullable if data_type hasn't.
/// It's expected that column can represent data_type after removing some NullMap's.
ColumnPtr castRemoveNullable(const ColumnPtr & column, const DataTypePtr & data_type) const;
Columns castColumns(Block & block, const ColumnNumbers & arguments,
struct CastArgumentsResult
{
ColumnsWithTypeAndName initial;
ColumnsWithTypeAndName casted;
};
CastArgumentsResult castColumns(Block & block, const ColumnNumbers & arguments,
const DataTypePtr & return_type, const DataTypePtr & return_type_with_nulls) const;
UnpackedArrays prepareArrays(const Columns & columns) const;
UnpackedArrays prepareArrays(const ColumnsWithTypeAndName & columns, ColumnsWithTypeAndName & initial_columns) const;
template <typename Map, typename ColumnType, bool is_numeric_column>
static ColumnPtr execute(const UnpackedArrays & arrays, MutableColumnPtr result_data);
@ -173,12 +189,13 @@ ColumnPtr FunctionArrayIntersect::castRemoveNullable(const ColumnPtr & column, c
return column;
}
Columns FunctionArrayIntersect::castColumns(
FunctionArrayIntersect::CastArgumentsResult FunctionArrayIntersect::castColumns(
Block & block, const ColumnNumbers & arguments, const DataTypePtr & return_type,
const DataTypePtr & return_type_with_nulls) const
{
size_t num_args = arguments.size();
Columns columns(num_args);
ColumnsWithTypeAndName initial_columns(num_args);
ColumnsWithTypeAndName columns(num_args);
auto type_array = checkAndGetDataType<DataTypeArray>(return_type.get());
auto & type_nested = type_array->getNestedType();
@ -201,6 +218,8 @@ Columns FunctionArrayIntersect::castColumns(
for (size_t i = 0; i < num_args; ++i)
{
const ColumnWithTypeAndName & arg = block.getByPosition(arguments[i]);
initial_columns[i] = arg;
columns[i] = arg;
auto & column = columns[i];
if (is_numeric_or_string)
@ -208,68 +227,120 @@ Columns FunctionArrayIntersect::castColumns(
/// Cast to Array(T) or Array(Nullable(T)).
if (nested_is_nullable)
{
if (arg.type->equals(*return_type))
column = arg.column;
else
column = castColumn(arg, return_type, context);
if (!arg.type->equals(*return_type))
{
column.column = castColumn(arg, return_type, context);
column.type = return_type;
}
}
else
{
/// If result has array type Array(T) still cast Array(Nullable(U)) to Array(Nullable(T))
/// because cannot cast Nullable(T) to T.
if (arg.type->equals(*return_type) || arg.type->equals(*nullable_return_type))
column = arg.column;
else if (static_cast<const DataTypeArray &>(*arg.type).getNestedType()->isNullable())
column = castColumn(arg, nullable_return_type, context);
else
column = castColumn(arg, return_type, context);
if (!arg.type->equals(*return_type) && !arg.type->equals(*nullable_return_type))
{
/// If result has array type Array(T) still cast Array(Nullable(U)) to Array(Nullable(T))
/// because cannot cast Nullable(T) to T.
if (static_cast<const DataTypeArray &>(*arg.type).getNestedType()->isNullable())
{
column.column = castColumn(arg, nullable_return_type, context);
column.type = nullable_return_type;
}
else
{
column.column = castColumn(arg, return_type, context);
column.type = return_type;
}
}
}
}
else
{
/// return_type_with_nulls is the most common subtype with possible nullable parts.
if (arg.type->equals(*return_type_with_nulls))
column = arg.column;
else
column = castColumn(arg, return_type_with_nulls, context);
if (!arg.type->equals(*return_type_with_nulls))
{
column.column = castColumn(arg, return_type_with_nulls, context);
column.type = return_type_with_nulls;
}
}
}
return columns;
return {.initial = initial_columns, .casted = columns};
}
FunctionArrayIntersect::UnpackedArrays FunctionArrayIntersect::prepareArrays(const Columns & columns) const
static ColumnPtr callFunctionNotEquals(ColumnWithTypeAndName first, ColumnWithTypeAndName second, const Context & context)
{
ColumnsWithTypeAndName args;
args.reserve(2);
args.emplace_back(std::move(first));
args.emplace_back(std::move(second));
auto eq_func = FunctionFactory::instance().get("notEquals", context)->build(args);
Block block = args;
block.insert({nullptr, eq_func->getReturnType(), ""});
eq_func->execute(block, {0, 1}, 2, args.front().column->size());
return block.getByPosition(2).column;
}
FunctionArrayIntersect::UnpackedArrays FunctionArrayIntersect::prepareArrays(
const ColumnsWithTypeAndName & columns, ColumnsWithTypeAndName & initial_columns) const
{
UnpackedArrays arrays;
size_t columns_number = columns.size();
arrays.is_const.assign(columns_number, false);
arrays.null_maps.resize(columns_number);
arrays.offsets.resize(columns_number);
arrays.nested_columns.resize(columns_number);
arrays.args.resize(columns_number);
bool all_const = true;
for (auto i : ext::range(0, columns_number))
{
auto argument_column = columns[i].get();
auto & arg = arrays.args[i];
auto argument_column = columns[i].column.get();
auto initial_column = initial_columns[i].column.get();
if (auto argument_column_const = typeid_cast<const ColumnConst *>(argument_column))
{
arrays.is_const[i] = true;
arg.is_const = true;
argument_column = argument_column_const->getDataColumnPtr().get();
initial_column = typeid_cast<const ColumnConst *>(initial_column)->getDataColumnPtr().get();
}
if (auto argument_column_array = typeid_cast<const ColumnArray *>(argument_column))
{
if (!arrays.is_const[i])
if (!arg.is_const)
all_const = false;
arrays.offsets[i] = &argument_column_array->getOffsets();
arrays.nested_columns[i] = &argument_column_array->getData();
if (auto column_nullable = typeid_cast<const ColumnNullable *>(arrays.nested_columns[i]))
arg.offsets = &argument_column_array->getOffsets();
arg.nested_column = &argument_column_array->getData();
initial_column = &typeid_cast<const ColumnArray *>(initial_column)->getData();
if (auto column_nullable = typeid_cast<const ColumnNullable *>(arg.nested_column))
{
arrays.null_maps[i] = &column_nullable->getNullMapData();
arrays.nested_columns[i] = &column_nullable->getNestedColumn();
arg.null_map = &column_nullable->getNullMapData();
arg.nested_column = &column_nullable->getNestedColumn();
initial_column = &typeid_cast<const ColumnNullable *>(initial_column)->getNestedColumn();
}
/// In case column was casted need to create overflow mask for integer types.
if (arg.nested_column != initial_column)
{
auto & nested_init_type = typeid_cast<const DataTypeArray *>(removeNullable(initial_columns[i].type).get())->getNestedType();
auto & nested_cast_type = typeid_cast<const DataTypeArray *>(removeNullable(columns[i].type).get())->getNestedType();
if (isInteger(nested_init_type) || isDateOrDateTime(nested_init_type))
{
/// Compare original and casted columns. It seem to be the easiest way.
auto overflow_mask = callFunctionNotEquals(
{arg.nested_column->getPtr(), nested_init_type, ""},
{initial_column->getPtr(), nested_cast_type, ""},
context);
arg.overflow_mask = &typeid_cast<const ColumnUInt8 *>(overflow_mask.get())->getData();
arrays.column_holders.emplace_back(std::move(overflow_mask));
}
}
}
else
@ -278,16 +349,16 @@ FunctionArrayIntersect::UnpackedArrays FunctionArrayIntersect::prepareArrays(con
if (all_const)
{
arrays.base_rows = arrays.offsets.front()->size();
arrays.base_rows = arrays.args.front().offsets->size();
}
else
{
for (auto i : ext::range(0, columns_number))
{
if (arrays.is_const[i])
if (arrays.args[i].is_const)
continue;
size_t rows = arrays.offsets[i]->size();
size_t rows = arrays.args[i].offsets->size();
if (arrays.base_rows == 0 && rows > 0)
arrays.base_rows = rows;
else if (arrays.base_rows != rows)
@ -322,9 +393,9 @@ void FunctionArrayIntersect::executeImpl(Block & block, const ColumnNumbers & ar
auto return_type_with_nulls = getMostSubtype(data_types, true, true);
Columns columns = castColumns(block, arguments, return_type, return_type_with_nulls);
auto columns = castColumns(block, arguments, return_type, return_type_with_nulls);
UnpackedArrays arrays = prepareArrays(columns);
UnpackedArrays arrays = prepareArrays(columns.casted, columns.initial);
ColumnPtr result_column;
auto not_nullable_nested_return_type = removeNullable(nested_return_type);
@ -356,7 +427,7 @@ void FunctionArrayIntersect::executeImpl(Block & block, const ColumnNumbers & ar
result_column = execute<StringMap, ColumnFixedString, false>(arrays, std::move(column));
else
{
column = static_cast<const DataTypeArray &>(*return_type_with_nulls).getNestedType()->createColumn();
column = assert_cast<const DataTypeArray &>(*return_type_with_nulls).getNestedType()->createColumn();
result_column = castRemoveNullable(execute<StringMap, IColumn, false>(arrays, std::move(column)), return_type);
}
}
@ -377,24 +448,24 @@ void FunctionArrayIntersect::NumberExecutor::operator()()
template <typename Map, typename ColumnType, bool is_numeric_column>
ColumnPtr FunctionArrayIntersect::execute(const UnpackedArrays & arrays, MutableColumnPtr result_data_ptr)
{
auto args = arrays.nested_columns.size();
auto args = arrays.args.size();
auto rows = arrays.base_rows;
bool all_nullable = true;
std::vector<const ColumnType *> columns;
columns.reserve(args);
for (auto arg : ext::range(0, args))
for (auto & arg : arrays.args)
{
if constexpr (std::is_same<ColumnType, IColumn>::value)
columns.push_back(arrays.nested_columns[arg]);
columns.push_back(arg.nested_column);
else
columns.push_back(checkAndGetColumn<ColumnType>(arrays.nested_columns[arg]));
columns.push_back(checkAndGetColumn<ColumnType>(arg.nested_column));
if (!columns.back())
throw Exception("Unexpected array type for function arrayIntersect", ErrorCodes::LOGICAL_ERROR);
if (!arrays.null_maps[arg])
if (!arg.null_map)
all_nullable = false;
}
@ -415,44 +486,45 @@ ColumnPtr FunctionArrayIntersect::execute(const UnpackedArrays & arrays, Mutable
bool all_has_nullable = all_nullable;
for (auto arg : ext::range(0, args))
for (auto arg_num : ext::range(0, args))
{
auto & arg = arrays.args[arg_num];
bool current_has_nullable = false;
size_t off;
// const array has only one row
bool const_arg = arrays.is_const[arg];
if (const_arg)
off = (*arrays.offsets[arg])[0];
if (arg.is_const)
off = (*arg.offsets)[0];
else
off = (*arrays.offsets[arg])[row];
off = (*arg.offsets)[row];
for (auto i : ext::range(prev_off[arg], off))
for (auto i : ext::range(prev_off[arg_num], off))
{
if (arrays.null_maps[arg] && (*arrays.null_maps[arg])[i])
if (arg.null_map && (*arg.null_map)[i])
current_has_nullable = true;
else
else if (!arg.overflow_mask || (*arg.overflow_mask)[i] == 0)
{
typename Map::mapped_type * value = nullptr;
if constexpr (is_numeric_column)
value = &map[columns[arg]->getElement(i)];
value = &map[columns[arg_num]->getElement(i)];
else if constexpr (std::is_same<ColumnType, ColumnString>::value || std::is_same<ColumnType, ColumnFixedString>::value)
value = &map[columns[arg]->getDataAt(i)];
value = &map[columns[arg_num]->getDataAt(i)];
else
{
const char * data = nullptr;
value = &map[columns[arg]->serializeValueIntoArena(i, arena, data)];
value = &map[columns[arg_num]->serializeValueIntoArena(i, arena, data)];
}
if (*value == arg)
/// Here we count the number of element appearances, but no more than once per array.
if (*value == arg_num)
++(*value);
}
}
prev_off[arg] = off;
if (const_arg)
prev_off[arg] = 0;
prev_off[arg_num] = off;
if (arg.is_const)
prev_off[arg_num] = 0;
if (!current_has_nullable)
all_has_nullable = false;

19
dbms/src/Functions/modulo.cpp
View File

@ -61,8 +61,23 @@ struct ModuloByConstantImpl
/// Here we failed to make the SSE variant from libdivide give an advantage.
size_t size = a.size();
for (size_t i = 0; i < size; ++i)
c[i] = a[i] - (a[i] / divider) * b; /// NOTE: perhaps, the division semantics with the remainder of negative numbers is not preserved.
/// strict aliasing optimization for char like arrays
auto * __restrict src = a.data();
auto * __restrict dst = c.data();
if (b & (b - 1))
{
for (size_t i = 0; i < size; ++i)
dst[i] = src[i] - (src[i] / divider) * b; /// NOTE: perhaps, the division semantics with the remainder of negative numbers is not preserved.
}
else
{
// gcc libdivide doesn't work well for pow2 division
auto mask = b - 1;
for (size_t i = 0; i < size; ++i)
dst[i] = src[i] & mask;
}
}
};

2
dbms/src/IO/BufferWithOwnMemory.h
View File

@ -77,7 +77,7 @@ struct Memory : boost::noncopyable, Allocator
m_capacity = new_size;
alloc();
}
else if (new_size <= m_size)
else if (new_size <= m_capacity - pad_right)
{
m_size = new_size;
return;

1
dbms/src/Interpreters/AnalyzedJoin.h
View File

@ -2,7 +2,6 @@
#include <Core/Names.h>
#include <Core/NamesAndTypes.h>
#include <Core/SettingsCommon.h>
#include <Parsers/ASTTablesInSelectQuery.h>
#include <Interpreters/IJoin.h>
#include <Interpreters/asof.h>

9
dbms/src/Interpreters/IdentifierSemantic.cpp
View File

@ -132,6 +132,15 @@ std::pair<String, String> IdentifierSemantic::extractDatabaseAndTable(const ASTI
return { "", identifier.name };
}
std::optional<String> IdentifierSemantic::extractNestedName(const ASTIdentifier & identifier, const String & table_name)
{
if (identifier.name_parts.size() == 3 && table_name == identifier.name_parts[0])
return identifier.name_parts[1] + '.' + identifier.name_parts[2];
else if (identifier.name_parts.size() == 2)
return identifier.name_parts[0] + '.' + identifier.name_parts[1];
return {};
}
bool IdentifierSemantic::doesIdentifierBelongTo(const ASTIdentifier & identifier, const String & database, const String & table)
{
size_t num_components = identifier.name_parts.size();

1
dbms/src/Interpreters/IdentifierSemantic.h
View File

@ -36,6 +36,7 @@ struct IdentifierSemantic
static std::optional<String> getTableName(const ASTIdentifier & node);
static std::optional<String> getTableName(const ASTPtr & ast);
static std::pair<String, String> extractDatabaseAndTable(const ASTIdentifier & identifier);
static std::optional<String> extractNestedName(const ASTIdentifier & identifier, const String & table_name);
static ColumnMatch canReferColumnToTable(const ASTIdentifier & identifier, const DatabaseAndTableWithAlias & db_and_table);
static void setColumnShortName(ASTIdentifier & identifier, const DatabaseAndTableWithAlias & db_and_table);

1
dbms/src/Interpreters/InJoinSubqueriesPreprocessor.h
View File

@ -1,6 +1,5 @@
#pragma once
#include <Core/SettingsCommon.h>
#include <Core/Types.h>
#include <Parsers/IAST_fwd.h>
#include <Storages/IStorage_fwd.h>

97
dbms/src/Interpreters/InterpreterSelectQuery.cpp
View File

@ -925,14 +925,14 @@ static UInt64 getLimitForSorting(const ASTSelectQuery & query, const Context & c
}
static SortingInfoPtr optimizeReadInOrder(const MergeTreeData & merge_tree, const ASTSelectQuery & query,
static InputSortingInfoPtr optimizeReadInOrder(const MergeTreeData & merge_tree, const ASTSelectQuery & query,
const Context & context, const SyntaxAnalyzerResultPtr & global_syntax_result)
{
if (!merge_tree.hasSortingKey())
return {};
auto order_descr = getSortDescription(query, context);
SortDescription prefix_order_descr;
SortDescription order_key_prefix_descr;
int read_direction = order_descr.at(0).direction;
const auto & sorting_key_columns = merge_tree.getSortingKeyColumns();
@ -947,7 +947,7 @@ static SortingInfoPtr optimizeReadInOrder(const MergeTreeData & merge_tree, cons
/// or in some simple cases when order key element is wrapped into monotonic function.
int current_direction = order_descr[i].direction;
if (order_descr[i].column_name == sorting_key_columns[i] && current_direction == read_direction)
prefix_order_descr.push_back(order_descr[i]);
order_key_prefix_descr.push_back(order_descr[i]);
else
{
auto ast = query.orderBy()->children[i]->children.at(0);
@ -995,14 +995,14 @@ static SortingInfoPtr optimizeReadInOrder(const MergeTreeData & merge_tree, cons
if (i == 0)
read_direction = current_direction;
prefix_order_descr.push_back(order_descr[i]);
order_key_prefix_descr.push_back(order_descr[i]);
}
}
if (prefix_order_descr.empty())
if (order_key_prefix_descr.empty())
return {};
return std::make_shared<SortingInfo>(std::move(prefix_order_descr), read_direction);
return std::make_shared<InputSortingInfo>(std::move(order_key_prefix_descr), read_direction);
}
@ -1026,11 +1026,11 @@ void InterpreterSelectQuery::executeImpl(TPipeline & pipeline, const BlockInputS
const Settings & settings = context.getSettingsRef();
auto & expressions = analysis_result;
SortingInfoPtr sorting_info;
InputSortingInfoPtr input_sorting_info;
if (settings.optimize_read_in_order && storage && query.orderBy() && !query_analyzer->hasAggregation() && !query.final() && !query.join())
{
if (const auto * merge_tree_data = dynamic_cast<const MergeTreeData *>(storage.get()))
sorting_info = optimizeReadInOrder(*merge_tree_data, query, context, syntax_analyzer_result);
input_sorting_info = optimizeReadInOrder(*merge_tree_data, query, context, syntax_analyzer_result);
}
if (options.only_analyze)
@ -1090,7 +1090,7 @@ void InterpreterSelectQuery::executeImpl(TPipeline & pipeline, const BlockInputS
throw Exception("PREWHERE is not supported if the table is filtered by row-level security expression", ErrorCodes::ILLEGAL_PREWHERE);
/** Read the data from Storage. from_stage - to what stage the request was completed in Storage. */
executeFetchColumns(from_stage, pipeline, sorting_info, expressions.prewhere_info, expressions.columns_to_remove_after_prewhere);
executeFetchColumns(from_stage, pipeline, input_sorting_info, expressions.prewhere_info, expressions.columns_to_remove_after_prewhere);
LOG_TRACE(log, QueryProcessingStage::toString(from_stage) << " -> " << QueryProcessingStage::toString(options.to_stage));
}
@ -1216,7 +1216,7 @@ void InterpreterSelectQuery::executeImpl(TPipeline & pipeline, const BlockInputS
if (!expressions.second_stage && !expressions.need_aggregate && !expressions.has_having)
{
if (expressions.has_order_by)
executeOrder(pipeline, query_info.sorting_info);
executeOrder(pipeline, query_info.input_sorting_info);
if (expressions.has_order_by && query.limitLength())
executeDistinct(pipeline, false, expressions.selected_columns);
@ -1289,7 +1289,7 @@ void InterpreterSelectQuery::executeImpl(TPipeline & pipeline, const BlockInputS
if (!expressions.first_stage && !expressions.need_aggregate && !(query.group_by_with_totals && !aggregate_final))
executeMergeSorted(pipeline);
else /// Otherwise, just sort.
executeOrder(pipeline, query_info.sorting_info);
executeOrder(pipeline, query_info.input_sorting_info);
}
/** Optimization - if there are several sources and there is LIMIT, then first apply the preliminary LIMIT,
@ -1349,7 +1349,7 @@ void InterpreterSelectQuery::executeImpl(TPipeline & pipeline, const BlockInputS
template <typename TPipeline>
void InterpreterSelectQuery::executeFetchColumns(
QueryProcessingStage::Enum processing_stage, TPipeline & pipeline,
const SortingInfoPtr & sorting_info, const PrewhereInfoPtr & prewhere_info, const Names & columns_to_remove_after_prewhere)
const InputSortingInfoPtr & input_sorting_info, const PrewhereInfoPtr & prewhere_info, const Names & columns_to_remove_after_prewhere)
{
constexpr bool pipeline_with_processors = std::is_same<TPipeline, QueryPipeline>::value;
@ -1666,7 +1666,7 @@ void InterpreterSelectQuery::executeFetchColumns(
query_info.syntax_analyzer_result = syntax_analyzer_result;
query_info.sets = query_analyzer->getPreparedSets();
query_info.prewhere_info = prewhere_info;
query_info.sorting_info = sorting_info;
query_info.input_sorting_info = input_sorting_info;
BlockInputStreams streams;
Pipes pipes;
@ -2248,46 +2248,46 @@ void InterpreterSelectQuery::executeExpression(QueryPipeline & pipeline, const E
});
}
void InterpreterSelectQuery::executeOrder(Pipeline & pipeline, SortingInfoPtr sorting_info)
void InterpreterSelectQuery::executeOrder(Pipeline & pipeline, InputSortingInfoPtr input_sorting_info)
{
auto & query = getSelectQuery();
SortDescription order_descr = getSortDescription(query, context);
SortDescription output_order_descr = getSortDescription(query, context);
const Settings & settings = context.getSettingsRef();
UInt64 limit = getLimitForSorting(query, context);
if (sorting_info)
if (input_sorting_info)
{
/* Case of sorting with optimization using sorting key.
* We have several threads, each of them reads batch of parts in direct
* or reverse order of sorting key using one input stream per part
* and then merge them into one sorted stream.
* At this stage we merge per-thread streams into one.
* If the input is sorted by some prefix of the sorting key required for output,
* we have to finish sorting after the merge.
*/
bool need_finish_sorting = (sorting_info->prefix_order_descr.size() < order_descr.size());
bool need_finish_sorting = (input_sorting_info->order_key_prefix_descr.size() < output_order_descr.size());
UInt64 limit_for_merging = (need_finish_sorting ? 0 : limit);
executeMergeSorted(pipeline, input_sorting_info->order_key_prefix_descr, limit_for_merging);
if (need_finish_sorting)
{
pipeline.transform([&](auto & stream)
{
stream = std::make_shared<PartialSortingBlockInputStream>(stream, order_descr, limit);
stream = std::make_shared<PartialSortingBlockInputStream>(stream, output_order_descr, limit);
});
}
UInt64 limit_for_merging = (need_finish_sorting ? 0 : limit);
executeMergeSorted(pipeline, sorting_info->prefix_order_descr, limit_for_merging);
if (need_finish_sorting)
{
pipeline.firstStream() = std::make_shared<FinishSortingBlockInputStream>(
pipeline.firstStream(), sorting_info->prefix_order_descr,
order_descr, settings.max_block_size, limit);
pipeline.firstStream(), input_sorting_info->order_key_prefix_descr,
output_order_descr, settings.max_block_size, limit);
}
}
else
{
pipeline.transform([&](auto & stream)
{
auto sorting_stream = std::make_shared<PartialSortingBlockInputStream>(stream, order_descr, limit);
auto sorting_stream = std::make_shared<PartialSortingBlockInputStream>(stream, output_order_descr, limit);
/// Limits on sorting
IBlockInputStream::LocalLimits limits;
@ -2303,16 +2303,16 @@ void InterpreterSelectQuery::executeOrder(Pipeline & pipeline, SortingInfoPtr so
/// Merge the sorted blocks.
pipeline.firstStream() = std::make_shared<MergeSortingBlockInputStream>(
pipeline.firstStream(), order_descr, settings.max_block_size, limit,
pipeline.firstStream(), output_order_descr, settings.max_block_size, limit,
settings.max_bytes_before_remerge_sort,
settings.max_bytes_before_external_sort, context.getTemporaryPath(), settings.min_free_disk_space_for_temporary_data);
}
}
void InterpreterSelectQuery::executeOrder(QueryPipeline & pipeline, SortingInfoPtr sorting_info)
void InterpreterSelectQuery::executeOrder(QueryPipeline & pipeline, InputSortingInfoPtr input_sorting_info)
{
auto & query = getSelectQuery();
SortDescription order_descr = getSortDescription(query, context);
SortDescription output_order_descr = getSortDescription(query, context);
UInt64 limit = getLimitForSorting(query, context);
const Settings & settings = context.getSettingsRef();
@ -2322,7 +2322,7 @@ void InterpreterSelectQuery::executeOrder(QueryPipeline & pipeline, SortingInfoP
// limits.mode = IBlockInputStream::LIMITS_TOTAL;
// limits.size_limits = SizeLimits(settings.max_rows_to_sort, settings.max_bytes_to_sort, settings.sort_overflow_mode);
if (sorting_info)
if (input_sorting_info)
{
/* Case of sorting with optimization using sorting key.
* We have several threads, each of them reads batch of parts in direct
@ -2331,16 +2331,7 @@ void InterpreterSelectQuery::executeOrder(QueryPipeline & pipeline, SortingInfoP
* At this stage we merge per-thread streams into one.
*/
bool need_finish_sorting = (sorting_info->prefix_order_descr.size() < order_descr.size());
if (need_finish_sorting)
{
pipeline.addSimpleTransform([&](const Block & header, QueryPipeline::StreamType stream_type)
{
bool do_count_rows = stream_type == QueryPipeline::StreamType::Main;
return std::make_shared<PartialSortingTransform>(header, order_descr, limit, do_count_rows);
});
}
bool need_finish_sorting = (input_sorting_info->order_key_prefix_descr.size() < output_order_descr.size());
if (pipeline.getNumStreams() > 1)
{
@ -2348,7 +2339,7 @@ void InterpreterSelectQuery::executeOrder(QueryPipeline & pipeline, SortingInfoP
auto transform = std::make_shared<MergingSortedTransform>(
pipeline.getHeader(),
pipeline.getNumStreams(),
sorting_info->prefix_order_descr,
input_sorting_info->order_key_prefix_descr,
settings.max_block_size, limit_for_merging);
pipeline.addPipe({ std::move(transform) });
@ -2356,11 +2347,17 @@ void InterpreterSelectQuery::executeOrder(QueryPipeline & pipeline, SortingInfoP
if (need_finish_sorting)
{
pipeline.addSimpleTransform([&](const Block & header, QueryPipeline::StreamType stream_type)
{
bool do_count_rows = stream_type == QueryPipeline::StreamType::Main;
return std::make_shared<PartialSortingTransform>(header, output_order_descr, limit, do_count_rows);
});
pipeline.addSimpleTransform([&](const Block & header) -> ProcessorPtr
{
return std::make_shared<FinishSortingTransform>(
header, sorting_info->prefix_order_descr,
order_descr, settings.max_block_size, limit);
header, input_sorting_info->order_key_prefix_descr,
output_order_descr, settings.max_block_size, limit);
});
}
@ -2370,7 +2367,7 @@ void InterpreterSelectQuery::executeOrder(QueryPipeline & pipeline, SortingInfoP
pipeline.addSimpleTransform([&](const Block & header, QueryPipeline::StreamType stream_type)
{
bool do_count_rows = stream_type == QueryPipeline::StreamType::Main;
return std::make_shared<PartialSortingTransform>(header, order_descr, limit, do_count_rows);
return std::make_shared<PartialSortingTransform>(header, output_order_descr, limit, do_count_rows);
});
/// If there are several streams, we merge them into one
@ -2383,7 +2380,7 @@ void InterpreterSelectQuery::executeOrder(QueryPipeline & pipeline, SortingInfoP
return nullptr;
return std::make_shared<MergeSortingTransform>(
header, order_descr, settings.max_block_size, limit,
header, output_order_descr, settings.max_block_size, limit,
settings.max_bytes_before_remerge_sort,
settings.max_bytes_before_external_sort, context.getTemporaryPath(), settings.min_free_disk_space_for_temporary_data);
});
@ -2808,11 +2805,11 @@ void InterpreterSelectQuery::executeExtremes(QueryPipeline & pipeline)
void InterpreterSelectQuery::executeSubqueriesInSetsAndJoins(Pipeline & pipeline, SubqueriesForSets & subqueries_for_sets)
{
/// Merge streams to one. Use MergeSorting if data was read in sorted order, Union otherwise.
if (query_info.sorting_info)
if (query_info.input_sorting_info)
{
if (pipeline.stream_with_non_joined_data)
throw Exception("Using read in order optimization, but has stream with non-joined data in pipeline", ErrorCodes::LOGICAL_ERROR);
executeMergeSorted(pipeline, query_info.sorting_info->prefix_order_descr, 0);
executeMergeSorted(pipeline, query_info.input_sorting_info->order_key_prefix_descr, 0);
}
else
executeUnion(pipeline, {});
@ -2823,11 +2820,11 @@ void InterpreterSelectQuery::executeSubqueriesInSetsAndJoins(Pipeline & pipeline
void InterpreterSelectQuery::executeSubqueriesInSetsAndJoins(QueryPipeline & pipeline, SubqueriesForSets & subqueries_for_sets)
{
if (query_info.sorting_info)
if (query_info.input_sorting_info)
{
if (pipeline.hasDelayedStream())
throw Exception("Using read in order optimization, but has delayed stream in pipeline", ErrorCodes::LOGICAL_ERROR);
executeMergeSorted(pipeline, query_info.sorting_info->prefix_order_descr, 0);
executeMergeSorted(pipeline, query_info.input_sorting_info->order_key_prefix_descr, 0);
}
const Settings & settings = context.getSettingsRef();

6
dbms/src/Interpreters/InterpreterSelectQuery.h
View File

@ -198,7 +198,7 @@ private:
template <typename TPipeline>
void executeFetchColumns(QueryProcessingStage::Enum processing_stage, TPipeline & pipeline,
const SortingInfoPtr & sorting_info, const PrewhereInfoPtr & prewhere_info,
const InputSortingInfoPtr & sorting_info, const PrewhereInfoPtr & prewhere_info,
const Names & columns_to_remove_after_prewhere);
void executeWhere(Pipeline & pipeline, const ExpressionActionsPtr & expression, bool remove_filter);
@ -207,7 +207,7 @@ private:
void executeTotalsAndHaving(Pipeline & pipeline, bool has_having, const ExpressionActionsPtr & expression, bool overflow_row, bool final);
void executeHaving(Pipeline & pipeline, const ExpressionActionsPtr & expression);
void executeExpression(Pipeline & pipeline, const ExpressionActionsPtr & expression);
void executeOrder(Pipeline & pipeline, SortingInfoPtr sorting_info);
void executeOrder(Pipeline & pipeline, InputSortingInfoPtr sorting_info);
void executeWithFill(Pipeline & pipeline);
void executeMergeSorted(Pipeline & pipeline);
void executePreLimit(Pipeline & pipeline);
@ -226,7 +226,7 @@ private:
void executeTotalsAndHaving(QueryPipeline & pipeline, bool has_having, const ExpressionActionsPtr & expression, bool overflow_row, bool final);
void executeHaving(QueryPipeline & pipeline, const ExpressionActionsPtr & expression);
void executeExpression(QueryPipeline & pipeline, const ExpressionActionsPtr & expression);
void executeOrder(QueryPipeline & pipeline, SortingInfoPtr sorting_info);
void executeOrder(QueryPipeline & pipeline, InputSortingInfoPtr sorting_info);
void executeWithFill(QueryPipeline & pipeline);
void executeMergeSorted(QueryPipeline & pipeline);
void executePreLimit(QueryPipeline & pipeline);

1
dbms/src/Interpreters/Join.h
View File

@ -10,7 +10,6 @@
#include <Interpreters/IJoin.h>
#include <Interpreters/AggregationCommon.h>
#include <Interpreters/RowRefs.h>
#include <Core/SettingsCommon.h>
#include <Common/Arena.h>
#include <Common/ColumnsHashing.h>

2
dbms/src/Interpreters/PredicateExpressionsOptimizer.cpp
View File

@ -142,7 +142,7 @@ bool PredicateExpressionsOptimizer::allowPushDown(
if (!subquery
|| (!settings.enable_optimize_predicate_expression_to_final_subquery && subquery->final())
|| subquery->limitBy() || subquery->limitLength()
|| subquery->with())
|| subquery->with() || subquery->withFill())
return false;
else
{

5
dbms/src/Interpreters/Set.cpp
View File

@ -427,11 +427,10 @@ void Set::checkColumnsNumber(size_t num_key_columns) const
void Set::checkTypesEqual(size_t set_type_idx, const DataTypePtr & other_type) const
{
if (!removeNullable(recursiveRemoveLowCardinality(data_types[set_type_idx]))->equals(*removeNullable(recursiveRemoveLowCardinality(other_type))))
throw Exception("Types of column " + toString(set_type_idx + 1) + " in section IN don't match: "
+ data_types[set_type_idx]->getName() + " on the right, " + other_type->getName() +
" on the left.", ErrorCodes::TYPE_MISMATCH);
+ other_type->getName() + " on the left, "
+ data_types[set_type_idx]->getName() + " on the right", ErrorCodes::TYPE_MISMATCH);
}
MergeTreeSetIndex::MergeTreeSetIndex(const Columns & set_elements, std::vector<KeyTuplePositionMapping> && index_mapping_)

27
dbms/src/Interpreters/TranslateQualifiedNamesVisitor.cpp
View File

@ -29,6 +29,26 @@ namespace ErrorCodes
extern const int LOGICAL_ERROR;
}
bool TranslateQualifiedNamesMatcher::Data::unknownColumn(size_t table_pos, const ASTIdentifier & identifier) const
{
const auto & table = tables[table_pos].first;
auto nested1 = IdentifierSemantic::extractNestedName(identifier, table.table);
auto nested2 = IdentifierSemantic::extractNestedName(identifier, table.alias);
String short_name = identifier.shortName();
const Names & column_names = tables[table_pos].second;
for (auto & known_name : column_names)
{
if (short_name == known_name)
return false;
if (nested1 && *nested1 == known_name)
return false;
if (nested2 && *nested2 == known_name)
return false;
}
return !column_names.empty();
}
bool TranslateQualifiedNamesMatcher::needChildVisit(ASTPtr & node, const ASTPtr & child)
{
/// Do not go to FROM, JOIN, subqueries.
@ -66,6 +86,13 @@ void TranslateQualifiedNamesMatcher::visit(ASTIdentifier & identifier, ASTPtr &,
bool allow_ambiguous = data.join_using_columns.count(short_name);
if (IdentifierSemantic::chooseTable(identifier, data.tables, table_pos, allow_ambiguous))
{
if (data.unknownColumn(table_pos, identifier))
{
String table_name = data.tables[table_pos].first.getQualifiedNamePrefix(false);
throw Exception("There's no column '" + identifier.name + "' in table '" + table_name + "'",
ErrorCodes::UNKNOWN_IDENTIFIER);
}
IdentifierSemantic::setMembership(identifier, table_pos);
/// In case if column from the joined table are in source columns, change it's name to qualified.

1
dbms/src/Interpreters/TranslateQualifiedNamesVisitor.h
View File

@ -38,6 +38,7 @@ public:
bool hasColumn(const String & name) const { return source_columns.count(name); }
bool hasTable() const { return !tables.empty(); }
bool processAsterisks() const { return hasTable() && has_columns; }
bool unknownColumn(size_t table_pos, const ASTIdentifier & node) const;
static std::vector<TableWithColumnNames> tablesOnly(const std::vector<DatabaseAndTableWithAlias> & tables)
{

10
dbms/src/Interpreters/Users.cpp
View File

@ -75,14 +75,15 @@ User::User(const String & name_, const String & config_elem, const Poco::Util::A
const auto config_sub_elem = config_elem + ".allow_databases";
if (config.has(config_sub_elem))
{
databases = DatabaseSet();
Poco::Util::AbstractConfiguration::Keys config_keys;
config.keys(config_sub_elem, config_keys);
databases.reserve(config_keys.size());
databases->reserve(config_keys.size());
for (const auto & key : config_keys)
{
const auto database_name = config.getString(config_sub_elem + "." + key);
databases.insert(database_name);
databases->insert(database_name);
}
}
@ -90,14 +91,15 @@ User::User(const String & name_, const String & config_elem, const Poco::Util::A
const auto config_dictionary_sub_elem = config_elem + ".allow_dictionaries";
if (config.has(config_dictionary_sub_elem))
{
dictionaries = DictionarySet();
Poco::Util::AbstractConfiguration::Keys config_keys;
config.keys(config_dictionary_sub_elem, config_keys);
dictionaries.reserve(config_keys.size());
dictionaries->reserve(config_keys.size());
for (const auto & key : config_keys)
{
const auto dictionary_name = config.getString(config_dictionary_sub_elem + "." + key);
dictionaries.insert(dictionary_name);
dictionaries->insert(dictionary_name);
}
}

4
dbms/src/Interpreters/Users.h
View File

@ -36,11 +36,11 @@ struct User
/// List of allowed databases.
using DatabaseSet = std::unordered_set<std::string>;
DatabaseSet databases;
std::optional<DatabaseSet> databases;
/// List of allowed dictionaries.
using DictionarySet = std::unordered_set<std::string>;
DictionarySet dictionaries;
std::optional<DictionarySet> dictionaries;
/// Table properties.
using PropertyMap = std::unordered_map<std::string /* name */, std::string /* value */>;

4
dbms/src/Interpreters/UsersManager.cpp
View File

@ -63,7 +63,7 @@ bool UsersManager::hasAccessToDatabase(const std::string & user_name, const std:
throw Exception("Unknown user " + user_name, ErrorCodes::UNKNOWN_USER);
auto user = it->second;
return user->databases.empty() || user->databases.count(database_name);
return !user->databases.has_value() || user->databases->count(database_name);
}
bool UsersManager::hasAccessToDictionary(const std::string & user_name, const std::string & dictionary_name) const
@ -74,6 +74,6 @@ bool UsersManager::hasAccessToDictionary(const std::string & user_name, const st
throw Exception("Unknown user " + user_name, ErrorCodes::UNKNOWN_USER);
auto user = it->second;
return user->dictionaries.empty() || user->dictionaries.count(dictionary_name);
return !user->dictionaries.has_value() || user->dictionaries->count(dictionary_name);
}
}

13
dbms/src/Parsers/ASTSelectQuery.cpp
View File

@ -3,6 +3,7 @@
#include <Parsers/ASTFunction.h>
#include <Parsers/ASTIdentifier.h>
#include <Parsers/ASTSelectQuery.h>
#include <Parsers/ASTOrderByElement.h>
#include <Parsers/ASTTablesInSelectQuery.h>
@ -276,6 +277,18 @@ bool ASTSelectQuery::final() const
return table_expression->final;
}
bool ASTSelectQuery::withFill() const
{
if (!orderBy())
return false;
for (const auto & order_expression_element : orderBy()->children)
if (order_expression_element->as<ASTOrderByElement &>().with_fill)
return true;
return false;
}
ASTPtr ASTSelectQuery::array_join_expression_list(bool & is_left) const
{

1
dbms/src/Parsers/ASTSelectQuery.h
View File

@ -83,6 +83,7 @@ public:
ASTPtr array_join_expression_list() const;
const ASTTablesInSelectQueryElement * join() const;
bool final() const;
bool withFill() const;
void replaceDatabaseAndTable(const String & database_name, const String & table_name);
void addTableFunction(ASTPtr & table_function_ptr);

2
dbms/src/Parsers/ParserCreateQuery.h
View File

@ -250,7 +250,7 @@ protected:
class ParserTablePropertyDeclaration : public IParserBase
{
protected:
const char * getName() const override { return "table propery (column, index, constraint) declaration"; }
const char * getName() const override { return "table property (column, index, constraint) declaration"; }
bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
};

3
dbms/src/Processors/Transforms/TotalsHavingTransform.h
View File

@ -1,7 +1,6 @@
#include <Processors/ISimpleTransform.h>
#include <Common/Arena.h>
#include <Core/SettingsCommon.h>
namespace DB
{
@ -12,6 +11,8 @@ using ArenaPtr = std::shared_ptr<Arena>;
class ExpressionActions;
using ExpressionActionsPtr = std::shared_ptr<ExpressionActions>;
enum class TotalsMode;
/** Takes blocks after grouping, with non-finalized aggregate functions.
* Calculates total values according to totals_mode.
* If necessary, evaluates the expression from HAVING and filters rows. Returns the finalized and filtered blocks.

41
dbms/src/Storages/Distributed/DirectoryMonitor.cpp
View File

@ -10,6 +10,7 @@
#include <Interpreters/Context.h>
#include <Storages/Distributed/DirectoryMonitor.h>
#include <IO/ReadBufferFromFile.h>
#include <IO/ReadBufferFromString.h>
#include <IO/WriteBufferFromFile.h>
#include <Compression/CompressedReadBuffer.h>
#include <IO/ConnectionTimeouts.h>
@ -269,17 +270,41 @@ void StorageDistributedDirectoryMonitor::processFile(const std::string & file_pa
void StorageDistributedDirectoryMonitor::readQueryAndSettings(
ReadBuffer & in, Settings & insert_settings, std::string & insert_query) const
{
UInt64 magic_number_or_query_size;
UInt64 query_size;
readVarUInt(query_size, in);
readVarUInt(magic_number_or_query_size, in);
if (magic_number_or_query_size == UInt64(DBMS_DISTRIBUTED_SENDS_MAGIC_NUMBER))
if (query_size == DBMS_DISTRIBUTED_SIGNATURE_EXTRA_INFO)
{
insert_settings.deserialize(in);
readVarUInt(magic_number_or_query_size, in);
/// Read extra information.
String extra_info_as_string;
readStringBinary(extra_info_as_string, in);
readVarUInt(query_size, in);
ReadBufferFromString extra_info(extra_info_as_string);
UInt64 initiator_revision;
readVarUInt(initiator_revision, extra_info);
if (ClickHouseRevision::get() < initiator_revision)
{
LOG_WARNING(
log,
"ClickHouse shard version is older than ClickHouse initiator version. "
<< "It may lack support for new features.");
}
insert_settings.deserialize(extra_info);
/// Add handling new data here, for example:
/// if (initiator_revision >= DBMS_MIN_REVISION_WITH_MY_NEW_DATA)
/// readVarUInt(my_new_data, extra_info);
}
insert_query.resize(magic_number_or_query_size);
in.readStrict(insert_query.data(), magic_number_or_query_size);
else if (query_size == DBMS_DISTRIBUTED_SIGNATURE_SETTINGS_OLD_FORMAT)
{
insert_settings.deserialize(in, SettingsBinaryFormat::OLD);
readVarUInt(query_size, in);
}
insert_query.resize(query_size);
in.readStrict(insert_query.data(), query_size);
}
struct StorageDistributedDirectoryMonitor::BatchHeader

15
dbms/src/Storages/Distributed/DistributedBlockOutputStream.cpp
View File

@ -588,8 +588,19 @@ void DistributedBlockOutputStream::writeToShard(const Block & block, const std::
CompressedWriteBuffer compress{out};
NativeBlockOutputStream stream{compress, ClickHouseRevision::get(), block.cloneEmpty()};
writeVarUInt(UInt64(DBMS_DISTRIBUTED_SENDS_MAGIC_NUMBER), out);
context.getSettingsRef().serialize(out);
/// We wrap the extra information into a string for compatibility with older versions:
/// a shard will able to read this information partly and ignore other parts
/// based on its version.
WriteBufferFromOwnString extra_info;
writeVarUInt(ClickHouseRevision::get(), extra_info);
context.getSettingsRef().serialize(extra_info);
/// Add new fields here, for example:
/// writeVarUInt(my_new_data, extra_info);
writeVarUInt(DBMS_DISTRIBUTED_SIGNATURE_EXTRA_INFO, out);
writeStringBinary(extra_info.str(), out);
writeStringBinary(query_string, out);
stream.writePrefix();

22
dbms/src/Storages/Kafka/KafkaSettings.h
View File

@ -1,6 +1,6 @@
#pragma once
#include <Core/SettingsCommon.h>
#include <Core/SettingsCollection.h>
namespace DB
@ -16,16 +16,16 @@ struct KafkaSettings : public SettingsCollection<KafkaSettings>
#define LIST_OF_KAFKA_SETTINGS(M) \
M(SettingString, kafka_broker_list, "", "A comma-separated list of brokers for Kafka engine.") \
M(SettingString, kafka_topic_list, "", "A list of Kafka topics.") \
M(SettingString, kafka_group_name, "", "A group of Kafka consumers.") \
M(SettingString, kafka_format, "", "The message format for Kafka engine.") \
M(SettingChar, kafka_row_delimiter, '\0', "The character to be considered as a delimiter in Kafka message.") \
M(SettingString, kafka_schema, "", "Schema identifier (used by schema-based formats) for Kafka engine") \
M(SettingUInt64, kafka_num_consumers, 1, "The number of consumers per table for Kafka engine.") \
M(SettingUInt64, kafka_max_block_size, 0, "The maximum block size per table for Kafka engine.") \
M(SettingUInt64, kafka_skip_broken_messages, 0, "Skip at least this number of broken messages from Kafka topic per block") \
M(SettingUInt64, kafka_commit_every_batch, 0, "Commit every consumed and handled batch instead of a single commit after writing a whole block")
M(SettingString, kafka_broker_list, "", "A comma-separated list of brokers for Kafka engine.", 0) \
M(SettingString, kafka_topic_list, "", "A list of Kafka topics.", 0) \
M(SettingString, kafka_group_name, "", "A group of Kafka consumers.", 0) \
M(SettingString, kafka_format, "", "The message format for Kafka engine.", 0) \
M(SettingChar, kafka_row_delimiter, '\0', "The character to be considered as a delimiter in Kafka message.", 0) \
M(SettingString, kafka_schema, "", "Schema identifier (used by schema-based formats) for Kafka engine", 0) \
M(SettingUInt64, kafka_num_consumers, 1, "The number of consumers per table for Kafka engine.", 0) \
M(SettingUInt64, kafka_max_block_size, 0, "The maximum block size per table for Kafka engine.", 0) \
M(SettingUInt64, kafka_skip_broken_messages, 0, "Skip at least this number of broken messages from Kafka topic per block", 0) \
M(SettingUInt64, kafka_commit_every_batch, 0, "Commit every consumed and handled batch instead of a single commit after writing a whole block", 0)
DECLARE_SETTINGS_COLLECTION(LIST_OF_KAFKA_SETTINGS)

14
dbms/src/Storages/MergeTree/MergeTreeDataSelectExecutor.cpp
View File

@ -604,9 +604,9 @@ Pipes MergeTreeDataSelectExecutor::readFromParts(
virt_column_names,
settings);
}
else if (settings.optimize_read_in_order && query_info.sorting_info)
else if (settings.optimize_read_in_order && query_info.input_sorting_info)
{
size_t prefix_size = query_info.sorting_info->prefix_order_descr.size();
size_t prefix_size = query_info.input_sorting_info->order_key_prefix_descr.size();
auto order_key_prefix_ast = data.sorting_key_expr_ast->clone();
order_key_prefix_ast->children.resize(prefix_size);
@ -853,7 +853,7 @@ Pipes MergeTreeDataSelectExecutor::spreadMarkRangesAmongStreamsWithOrder(
const Settings & settings) const
{
size_t sum_marks = 0;
SortingInfoPtr sorting_info = query_info.sorting_info;
const InputSortingInfoPtr & input_sorting_info = query_info.input_sorting_info;
size_t adaptive_parts = 0;
std::vector<size_t> sum_marks_in_parts(parts.size());
const auto data_settings = data.getSettings();
@ -1004,9 +1004,9 @@ Pipes MergeTreeDataSelectExecutor::spreadMarkRangesAmongStreamsWithOrder(
parts.emplace_back(part);
}
ranges_to_get_from_part = split_ranges(ranges_to_get_from_part, sorting_info->direction);
ranges_to_get_from_part = split_ranges(ranges_to_get_from_part, input_sorting_info->direction);
if (sorting_info->direction == 1)
if (input_sorting_info->direction == 1)
{
pipes.emplace_back(std::make_shared<MergeTreeSelectProcessor>(
data, part.data_part, max_block_size, settings.preferred_block_size_bytes,
@ -1029,9 +1029,9 @@ Pipes MergeTreeDataSelectExecutor::spreadMarkRangesAmongStreamsWithOrder(
if (pipes.size() > 1)
{
SortDescription sort_description;
for (size_t j = 0; j < query_info.sorting_info->prefix_order_descr.size(); ++j)
for (size_t j = 0; j < input_sorting_info->order_key_prefix_descr.size(); ++j)
sort_description.emplace_back(data.sorting_key_columns[j],
sorting_info->direction, 1);
input_sorting_info->direction, 1);
for (auto & pipe : pipes)
pipe.addSimpleTransform(std::make_shared<ExpressionTransform>(pipe.getHeader(), sorting_key_prefix_expr));

110
dbms/src/Storages/MergeTree/MergeTreeSettings.h
View File

@ -1,7 +1,7 @@
#pragma once
#include <Core/Defines.h>
#include <Core/SettingsCommon.h>
#include <Core/SettingsCollection.h>
#include <Common/SettingsChanges.h>
@ -26,70 +26,70 @@ struct MergeTreeSettings : public SettingsCollection<MergeTreeSettings>
{
#define LIST_OF_MERGE_TREE_SETTINGS(M) \
M(SettingUInt64, index_granularity, 8192, "How many rows correspond to one primary key value.") \
M(SettingUInt64, index_granularity, 8192, "How many rows correspond to one primary key value.", 0) \
\
/** Merge settings. */ \
M(SettingUInt64, merge_max_block_size, DEFAULT_MERGE_BLOCK_SIZE, "How many rows in blocks should be formed for merge operations.") \
M(SettingUInt64, max_bytes_to_merge_at_max_space_in_pool, 150ULL * 1024 * 1024 * 1024, "Maximum in total size of parts to merge, when there are maximum free threads in background pool (or entries in replication queue).") \
M(SettingUInt64, max_bytes_to_merge_at_min_space_in_pool, 1024 * 1024, "Maximum in total size of parts to merge, when there are minimum free threads in background pool (or entries in replication queue).") \
M(SettingUInt64, max_replicated_merges_in_queue, 16, "How many tasks of merging and mutating parts are allowed simultaneously in ReplicatedMergeTree queue.") \
M(SettingUInt64, max_replicated_mutations_in_queue, 8, "How many tasks of mutating parts are allowed simultaneously in ReplicatedMergeTree queue.") \
M(SettingUInt64, number_of_free_entries_in_pool_to_lower_max_size_of_merge, 8, "When there is less than specified number of free entries in pool (or replicated queue), start to lower maximum size of merge to process (or to put in queue). This is to allow small merges to process - not filling the pool with long running merges.") \
M(SettingUInt64, number_of_free_entries_in_pool_to_execute_mutation, 10, "When there is less than specified number of free entries in pool, do not execute part mutations. This is to leave free threads for regular merges and avoid \"Too many parts\"") \
M(SettingSeconds, old_parts_lifetime, 8 * 60, "How many seconds to keep obsolete parts.") \
M(SettingSeconds, temporary_directories_lifetime, 86400, "How many seconds to keep tmp_-directories.") \
M(SettingUInt64, merge_max_block_size, DEFAULT_MERGE_BLOCK_SIZE, "How many rows in blocks should be formed for merge operations.", 0) \
M(SettingUInt64, max_bytes_to_merge_at_max_space_in_pool, 150ULL * 1024 * 1024 * 1024, "Maximum in total size of parts to merge, when there are maximum free threads in background pool (or entries in replication queue).", 0) \
M(SettingUInt64, max_bytes_to_merge_at_min_space_in_pool, 1024 * 1024, "Maximum in total size of parts to merge, when there are minimum free threads in background pool (or entries in replication queue).", 0) \
M(SettingUInt64, max_replicated_merges_in_queue, 16, "How many tasks of merging and mutating parts are allowed simultaneously in ReplicatedMergeTree queue.", 0) \
M(SettingUInt64, max_replicated_mutations_in_queue, 8, "How many tasks of mutating parts are allowed simultaneously in ReplicatedMergeTree queue.", 0) \
M(SettingUInt64, number_of_free_entries_in_pool_to_lower_max_size_of_merge, 8, "When there is less than specified number of free entries in pool (or replicated queue), start to lower maximum size of merge to process (or to put in queue). This is to allow small merges to process - not filling the pool with long running merges.", 0) \
M(SettingUInt64, number_of_free_entries_in_pool_to_execute_mutation, 10, "When there is less than specified number of free entries in pool, do not execute part mutations. This is to leave free threads for regular merges and avoid \"Too many parts\"", 0) \
M(SettingSeconds, old_parts_lifetime, 8 * 60, "How many seconds to keep obsolete parts.", 0) \
M(SettingSeconds, temporary_directories_lifetime, 86400, "How many seconds to keep tmp_-directories.", 0) \
\
/** Inserts settings. */ \
M(SettingUInt64, parts_to_delay_insert, 150, "If table contains at least that many active parts in single partition, artificially slow down insert into table.") \
M(SettingUInt64, parts_to_throw_insert, 300, "If more than this number active parts in single partition, throw 'Too many parts ...' exception.") \
M(SettingUInt64, max_delay_to_insert, 1, "Max delay of inserting data into MergeTree table in seconds, if there are a lot of unmerged parts in single partition.") \
M(SettingUInt64, max_parts_in_total, 100000, "If more than this number active parts in all partitions in total, throw 'Too many parts ...' exception.") \
M(SettingUInt64, parts_to_delay_insert, 150, "If table contains at least that many active parts in single partition, artificially slow down insert into table.", 0) \
M(SettingUInt64, parts_to_throw_insert, 300, "If more than this number active parts in single partition, throw 'Too many parts ...' exception.", 0) \
M(SettingUInt64, max_delay_to_insert, 1, "Max delay of inserting data into MergeTree table in seconds, if there are a lot of unmerged parts in single partition.", 0) \
M(SettingUInt64, max_parts_in_total, 100000, "If more than this number active parts in all partitions in total, throw 'Too many parts ...' exception.", 0) \
\
/** Replication settings. */ \
M(SettingUInt64, replicated_deduplication_window, 100, "How many last blocks of hashes should be kept in ZooKeeper (old blocks will be deleted).") \
M(SettingUInt64, replicated_deduplication_window_seconds, 7 * 24 * 60 * 60 /* one week */, "Similar to \"replicated_deduplication_window\", but determines old blocks by their lifetime. Hash of an inserted block will be deleted (and the block will not be deduplicated after) if it outside of one \"window\". You can set very big replicated_deduplication_window to avoid duplicating INSERTs during that period of time.") \
M(SettingUInt64, max_replicated_logs_to_keep, 10000, "How many records may be in log, if there is inactive replica.") \
M(SettingUInt64, min_replicated_logs_to_keep, 100, "Keep about this number of last records in ZooKeeper log, even if they are obsolete. It doesn't affect work of tables: used only to diagnose ZooKeeper log before cleaning.") \
M(SettingSeconds, prefer_fetch_merged_part_time_threshold, 3600, "If time passed after replication log entry creation exceeds this threshold and sum size of parts is greater than \"prefer_fetch_merged_part_size_threshold\", prefer fetching merged part from replica instead of doing merge locally. To speed up very long merges.") \
M(SettingUInt64, prefer_fetch_merged_part_size_threshold, 10ULL * 1024 * 1024 * 1024, "If sum size of parts exceeds this threshold and time passed after replication log entry creation is greater than \"prefer_fetch_merged_part_time_threshold\", prefer fetching merged part from replica instead of doing merge locally. To speed up very long merges.") \
M(SettingUInt64, max_suspicious_broken_parts, 10, "Max broken parts, if more - deny automatic deletion.") \
M(SettingUInt64, max_files_to_modify_in_alter_columns, 75, "Not apply ALTER if number of files for modification(deletion, addition) more than this.") \
M(SettingUInt64, max_files_to_remove_in_alter_columns, 50, "Not apply ALTER, if number of files for deletion more than this.") \
M(SettingFloat, replicated_max_ratio_of_wrong_parts, 0.5, "If ratio of wrong parts to total number of parts is less than this - allow to start.") \
M(SettingUInt64, replicated_max_parallel_fetches, 0, "Limit parallel fetches.") \
M(SettingUInt64, replicated_max_parallel_fetches_for_table, 0, "Limit parallel fetches for one table.") \
M(SettingUInt64, replicated_max_parallel_fetches_for_host, DEFAULT_COUNT_OF_HTTP_CONNECTIONS_PER_ENDPOINT, "Limit parallel fetches from endpoint (actually pool size).") \
M(SettingUInt64, replicated_max_parallel_sends, 0, "Limit parallel sends.") \
M(SettingUInt64, replicated_max_parallel_sends_for_table, 0, "Limit parallel sends for one table.") \
M(SettingBool, replicated_can_become_leader, true, "If true, Replicated tables replicas on this node will try to acquire leadership.") \
M(SettingSeconds, zookeeper_session_expiration_check_period, 60, "ZooKeeper session expiration check period, in seconds.") \
M(SettingUInt64, replicated_deduplication_window, 100, "How many last blocks of hashes should be kept in ZooKeeper (old blocks will be deleted).", 0) \
M(SettingUInt64, replicated_deduplication_window_seconds, 7 * 24 * 60 * 60 /* one week */, "Similar to \"replicated_deduplication_window\", but determines old blocks by their lifetime. Hash of an inserted block will be deleted (and the block will not be deduplicated after) if it outside of one \"window\". You can set very big replicated_deduplication_window to avoid duplicating INSERTs during that period of time.", 0) \
M(SettingUInt64, max_replicated_logs_to_keep, 10000, "How many records may be in log, if there is inactive replica.", 0) \
M(SettingUInt64, min_replicated_logs_to_keep, 100, "Keep about this number of last records in ZooKeeper log, even if they are obsolete. It doesn't affect work of tables: used only to diagnose ZooKeeper log before cleaning.", 0) \
M(SettingSeconds, prefer_fetch_merged_part_time_threshold, 3600, "If time passed after replication log entry creation exceeds this threshold and sum size of parts is greater than \"prefer_fetch_merged_part_size_threshold\", prefer fetching merged part from replica instead of doing merge locally. To speed up very long merges.", 0) \
M(SettingUInt64, prefer_fetch_merged_part_size_threshold, 10ULL * 1024 * 1024 * 1024, "If sum size of parts exceeds this threshold and time passed after replication log entry creation is greater than \"prefer_fetch_merged_part_time_threshold\", prefer fetching merged part from replica instead of doing merge locally. To speed up very long merges.", 0) \
M(SettingUInt64, max_suspicious_broken_parts, 10, "Max broken parts, if more - deny automatic deletion.", 0) \
M(SettingUInt64, max_files_to_modify_in_alter_columns, 75, "Not apply ALTER if number of files for modification(deletion, addition) more than this.", 0) \
M(SettingUInt64, max_files_to_remove_in_alter_columns, 50, "Not apply ALTER, if number of files for deletion more than this.", 0) \
M(SettingFloat, replicated_max_ratio_of_wrong_parts, 0.5, "If ratio of wrong parts to total number of parts is less than this - allow to start.", 0) \
M(SettingUInt64, replicated_max_parallel_fetches, 0, "Limit parallel fetches.", 0) \
M(SettingUInt64, replicated_max_parallel_fetches_for_table, 0, "Limit parallel fetches for one table.", 0) \
M(SettingUInt64, replicated_max_parallel_fetches_for_host, DEFAULT_COUNT_OF_HTTP_CONNECTIONS_PER_ENDPOINT, "Limit parallel fetches from endpoint (actually pool size).", 0) \
M(SettingUInt64, replicated_max_parallel_sends, 0, "Limit parallel sends.", 0) \
M(SettingUInt64, replicated_max_parallel_sends_for_table, 0, "Limit parallel sends for one table.", 0) \
M(SettingBool, replicated_can_become_leader, true, "If true, Replicated tables replicas on this node will try to acquire leadership.", 0) \
M(SettingSeconds, zookeeper_session_expiration_check_period, 60, "ZooKeeper session expiration check period, in seconds.", 0) \
\
/** Check delay of replicas settings. */ \
M(SettingUInt64, check_delay_period, 60, "Period to check replication delay and compare with other replicas.") \
M(SettingUInt64, cleanup_delay_period, 30, "Period to clean old queue logs, blocks hashes and parts.") \
M(SettingUInt64, cleanup_delay_period_random_add, 10, "Add uniformly distributed value from 0 to x seconds to cleanup_delay_period to avoid thundering herd effect and subsequent DoS of ZooKeeper in case of very large number of tables.") \
M(SettingUInt64, min_relative_delay_to_yield_leadership, 120, "Minimal delay from other replicas to yield leadership. Here and further 0 means unlimited.") \
M(SettingUInt64, min_relative_delay_to_close, 300, "Minimal delay from other replicas to close, stop serving requests and not return Ok during status check.") \
M(SettingUInt64, min_absolute_delay_to_close, 0, "Minimal absolute delay to close, stop serving requests and not return Ok during status check.") \
M(SettingUInt64, enable_vertical_merge_algorithm, 1, "Enable usage of Vertical merge algorithm.") \
M(SettingUInt64, vertical_merge_algorithm_min_rows_to_activate, 16 * DEFAULT_MERGE_BLOCK_SIZE, "Minimal (approximate) sum of rows in merging parts to activate Vertical merge algorithm.") \
M(SettingUInt64, vertical_merge_algorithm_min_columns_to_activate, 11, "Minimal amount of non-PK columns to activate Vertical merge algorithm.") \
M(SettingUInt64, check_delay_period, 60, "Period to check replication delay and compare with other replicas.", 0) \
M(SettingUInt64, cleanup_delay_period, 30, "Period to clean old queue logs, blocks hashes and parts.", 0) \
M(SettingUInt64, cleanup_delay_period_random_add, 10, "Add uniformly distributed value from 0 to x seconds to cleanup_delay_period to avoid thundering herd effect and subsequent DoS of ZooKeeper in case of very large number of tables.", 0) \
M(SettingUInt64, min_relative_delay_to_yield_leadership, 120, "Minimal delay from other replicas to yield leadership. Here and further 0 means unlimited.", 0) \
M(SettingUInt64, min_relative_delay_to_close, 300, "Minimal delay from other replicas to close, stop serving requests and not return Ok during status check.", 0) \
M(SettingUInt64, min_absolute_delay_to_close, 0, "Minimal absolute delay to close, stop serving requests and not return Ok during status check.", 0) \
M(SettingUInt64, enable_vertical_merge_algorithm, 1, "Enable usage of Vertical merge algorithm.", 0) \
M(SettingUInt64, vertical_merge_algorithm_min_rows_to_activate, 16 * DEFAULT_MERGE_BLOCK_SIZE, "Minimal (approximate) sum of rows in merging parts to activate Vertical merge algorithm.", 0) \
M(SettingUInt64, vertical_merge_algorithm_min_columns_to_activate, 11, "Minimal amount of non-PK columns to activate Vertical merge algorithm.", 0) \
\
/** Compatibility settings */ \
M(SettingBool, compatibility_allow_sampling_expression_not_in_primary_key, false, "Allow to create a table with sampling expression not in primary key. This is needed only to temporarily allow to run the server with wrong tables for backward compatibility.") \
M(SettingBool, use_minimalistic_checksums_in_zookeeper, true, "Use small format (dozens bytes) for part checksums in ZooKeeper instead of ordinary ones (dozens KB). Before enabling check that all replicas support new format.") \
M(SettingBool, use_minimalistic_part_header_in_zookeeper, false, "Store part header (checksums and columns) in a compact format and a single part znode instead of separate znodes (<part>/columns and <part>/checksums). This can dramatically reduce snapshot size in ZooKeeper. Before enabling check that all replicas support new format.") \
M(SettingUInt64, finished_mutations_to_keep, 100, "How many records about mutations that are done to keep. If zero, then keep all of them.") \
M(SettingUInt64, min_merge_bytes_to_use_direct_io, 10ULL * 1024 * 1024 * 1024, "Minimal amount of bytes to enable O_DIRECT in merge (0 - disabled).") \
M(SettingUInt64, index_granularity_bytes, 10 * 1024 * 1024, "Approximate amount of bytes in single granule (0 - disabled).") \
M(SettingInt64, merge_with_ttl_timeout, 3600 * 24, "Minimal time in seconds, when merge with TTL can be repeated.") \
M(SettingBool, ttl_only_drop_parts, false, "Only drop altogether the expired parts and not partially prune them.") \
M(SettingBool, write_final_mark, 1, "Write final mark after end of column (0 - disabled, do nothing if index_granularity_bytes=0)") \
M(SettingBool, enable_mixed_granularity_parts, 0, "Enable parts with adaptive and non adaptive granularity") \
M(SettingMaxThreads, max_part_loading_threads, 0, "The number of theads to load data parts at startup.") \
M(SettingMaxThreads, max_part_removal_threads, 0, "The number of theads for concurrent removal of inactive data parts. One is usually enough, but in 'Google Compute Environment SSD Persistent Disks' file removal (unlink) operation is extraordinarily slow and you probably have to increase this number (recommended is up to 16).") \
M(SettingUInt64, concurrent_part_removal_threshold, 100, "Activate concurrent part removal (see 'max_part_removal_threads') only if the number of inactive data parts is at least this.") \
M(SettingString, storage_policy, "default", "Name of storage disk policy")
M(SettingBool, compatibility_allow_sampling_expression_not_in_primary_key, false, "Allow to create a table with sampling expression not in primary key. This is needed only to temporarily allow to run the server with wrong tables for backward compatibility.", 0) \
M(SettingBool, use_minimalistic_checksums_in_zookeeper, true, "Use small format (dozens bytes) for part checksums in ZooKeeper instead of ordinary ones (dozens KB). Before enabling check that all replicas support new format.", 0) \
M(SettingBool, use_minimalistic_part_header_in_zookeeper, false, "Store part header (checksums and columns) in a compact format and a single part znode instead of separate znodes (<part>/columns and <part>/checksums). This can dramatically reduce snapshot size in ZooKeeper. Before enabling check that all replicas support new format.", 0) \
M(SettingUInt64, finished_mutations_to_keep, 100, "How many records about mutations that are done to keep. If zero, then keep all of them.", 0) \
M(SettingUInt64, min_merge_bytes_to_use_direct_io, 10ULL * 1024 * 1024 * 1024, "Minimal amount of bytes to enable O_DIRECT in merge (0 - disabled).", 0) \
M(SettingUInt64, index_granularity_bytes, 10 * 1024 * 1024, "Approximate amount of bytes in single granule (0 - disabled).", 0) \
M(SettingInt64, merge_with_ttl_timeout, 3600 * 24, "Minimal time in seconds, when merge with TTL can be repeated.", 0) \
M(SettingBool, ttl_only_drop_parts, false, "Only drop altogether the expired parts and not partially prune them.", 0) \
M(SettingBool, write_final_mark, 1, "Write final mark after end of column (0 - disabled, do nothing if index_granularity_bytes=0)", 0) \
M(SettingBool, enable_mixed_granularity_parts, 0, "Enable parts with adaptive and non adaptive granularity", 0) \
M(SettingMaxThreads, max_part_loading_threads, 0, "The number of theads to load data parts at startup.", 0) \
M(SettingMaxThreads, max_part_removal_threads, 0, "The number of theads for concurrent removal of inactive data parts. One is usually enough, but in 'Google Compute Environment SSD Persistent Disks' file removal (unlink) operation is extraordinarily slow and you probably have to increase this number (recommended is up to 16).", 0) \
M(SettingUInt64, concurrent_part_removal_threshold, 100, "Activate concurrent part removal (see 'max_part_removal_threads') only if the number of inactive data parts is at least this.", 0) \
M(SettingString, storage_policy, "default", "Name of storage disk policy", 0)
DECLARE_SETTINGS_COLLECTION(LIST_OF_MERGE_TREE_SETTINGS)

12
dbms/src/Storages/SelectQueryInfo.h
View File

@ -34,18 +34,18 @@ struct FilterInfo
bool do_remove_column = false;
};
struct SortingInfo
struct InputSortingInfo
{
SortDescription prefix_order_descr;
SortDescription order_key_prefix_descr;
int direction;
SortingInfo(const SortDescription & prefix_order_descr_, int direction_)
: prefix_order_descr(prefix_order_descr_), direction(direction_) {}
InputSortingInfo(const SortDescription & order_key_prefix_descr_, int direction_)
: order_key_prefix_descr(order_key_prefix_descr_), direction(direction_) {}
};
using PrewhereInfoPtr = std::shared_ptr<PrewhereInfo>;
using FilterInfoPtr = std::shared_ptr<FilterInfo>;
using SortingInfoPtr = std::shared_ptr<SortingInfo>;
using InputSortingInfoPtr = std::shared_ptr<InputSortingInfo>;
struct SyntaxAnalyzerResult;
using SyntaxAnalyzerResultPtr = std::shared_ptr<const SyntaxAnalyzerResult>;
@ -62,7 +62,7 @@ struct SelectQueryInfo
PrewhereInfoPtr prewhere_info;
SortingInfoPtr sorting_info;
InputSortingInfoPtr input_sorting_info;
/// Prepared sets are used for indices by storage engine.
/// Example: x IN (1, 2, 3)

1
dbms/src/Storages/StorageMerge.cpp
View File

@ -25,7 +25,6 @@
#include <Common/typeid_cast.h>
#include <Common/checkStackSize.h>
#include <Databases/IDatabase.h>
#include <Core/SettingsCommon.h>
#include <ext/range.h>
#include <algorithm>
#include <Parsers/ASTFunction.h>

268
dbms/tests/instructions/developer_instruction_en.md Normal file
View File

@ -0,0 +1,268 @@
Building of ClickHouse is supported on Linux, FreeBSD and Mac OS X.
# If you use Windows
If you use Windows, you need to create a virtual machine with Ubuntu. To start working with a virtual machine please install VirtualBox. You can download Ubuntu from the website: https://www.ubuntu.com/#download. Please create a virtual machine from the downloaded image (you should reserve at least 4GB of RAM for it). To run a command line terminal in Ubuntu, please locate a program containing the word "terminal" in its name (gnome-terminal, konsole etc.) or just press Ctrl+Alt+T.
# Creating a repository on GitHub
To start working with ClickHouse repository you will need a GitHub account.
You probably already have one, but if you don't, please register at https://github.com. In case you do not have SSH keys, you should generate them and then upload them on GitHub. It is required for sending over your patches. It is also possible to use the same SSH keys that you use with any other SSH servers - probably you already have those.
Create a fork of ClickHouse repository. To do that please click on the "fork" button in the upper right corner at https://github.com/ClickHouse/ClickHouse. It will fork your own copy of ClickHouse/ClickHouse to your account.
Development process consists of first committing the intended changes into your fork of ClickHouse and then creating a "pull request" for these changes to be accepted into the main repository (ClickHouse/ClickHouse).
To work with git repositories, please install `git`.
To do that in Ubuntu you would run in the command line terminal:
```
sudo apt update
sudo apt install git
```
A brief manual on using Git can be found here: https://services.github.com/on-demand/downloads/github-git-cheat-sheet.pdf.
For a detailed manual on Git see: https://git-scm.com/book/ru/v2.
# Cloning a repository to your development machine
Next, you need to download the source files onto your working machine. This is called "to clone a repository" because it creates a local copy of the repository on your working machine.
In the command line terminal run:
```
git clone --recursive git@guthub.com:your_github_username/ClickHouse.git
cd ClickHouse
```
Note: please, substitute *your_github_username* with what is appropriate!
This command will create a directory `ClickHouse` containing the working copy of the project.
It is important that the path to the working directory contains no whitespaces as it may lead to problems with running the build system.
Please note that ClickHouse repository uses `submodules`. That is what the references to additional repositories are called (i.e. external libraries on which the project depends). It means that when cloning the repository you need to specify the `--recursive` flag as in the example above. If the repository has been cloned without submodules, to download them you need to run the following:
```
git submodule init
git submodule update
```
You can check status with command: `git submodule status`.
If you get the following error message:
```
Permission denied (publickey).
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.
```
It generally means that the SSH keys for connecting to GitHub are missing. These keys are normally located in `~/.ssh`. For SSH keys to be accepted you need to upload them in the settings section of GitHub UI.
You can also clone the repository via https protocol:
```
git clone https://github.com/ClickHouse/ClickHouse.git
```
This however will not let you send your changes to the server. You can still use it temporarily and add the SSH keys later replacing the remote address of the repository with `git remote` command.
You can also add original ClickHouse repo's address to your local repository to pull updates from there:
```
git remote add upstream git@github.com:ClickHouse/ClickHouse.git
```
After successfully running this command you will be able to pull updates from the main ClickHouse repo by running `git pull upstream master`.
# Build System
ClickHouse uses CMake and Ninja for building.
CMake - a meta-build system that can generate Ninja files (build tasks).
Ninja - a smaller build system with focus on speed used to execute those cmake generated tasks.
To install on Ubuntu, Debian or Mint run `sudo apt install cmake ninja-build`.
On CentOS, RedHat run `sudo yum install cmake ninja-build`.
If you use Arch or Gentoo, you probably know it yourself how to install CMake.
For installing CMake and Ninja on Mac OS X first install Homebrew and then install everything else via brew:
```
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
brew install cmake ninja
```
Next, check the version of CMake: `cmake --version`. If it is below 3.3, you should install a newer version from the website: https://cmake.org/download/.
# Optional External Libraries
ClickHouse uses several external libraries for building. Most of them do not need to be installed separately as they are built together with ClickHouse from the sources located in the submodules. You can check the list in `contrib`.
There is a couple of libraries that are not built from sources but are supplied by the system: ICU and Readline, and thus are recommended to be installed.
Ubuntu: `sudo apt install libicu-dev libreadline-dev`
Mac OS X: `brew install icu4c readline`
However, these libraries are optional and ClickHouse can well be built without them. ICU is used for support of `COLLATE` in `ORDER BY` (i.e. for sorting in turkish alphabet). Readline is used for more convenient command input in clickhouse-client.
# C++ Compiler
Compilers GCC starting from version 7 and Clang version 7 or above are supported for building ClickHouse.
Official Yandex builds currently use GCC because it generates machine code of slightly better performance (yielding a difference of up to several percent according to our benchmarks). And Clang is more convenient for development usually. Though, our continuous integration (CI) platform runs checks for about a dozen of build combinations.
To install GCC on Ubuntu run: `sudo apt install gcc g++`
Check the version of gcc: `gcc --version`. If it is below 7, then follow the instruction here: https://clickhouse.yandex/docs/en/development/build/#install-gcc-7.
To install GCC on Mac OS X run: `brew install gcc`.
If you decide to use Clang, you can also install `libc++` and `lld`, if you know what it is. Using `ccache` is also recommended.
# The Building process
Now that you are ready to build ClickHouse we recommend you to create a separate directory `build` inside `ClickHouse` that will contain all of the build artefacts:
```
mkdir build
cd build
```
You can have several different directories (build_release, build_debug, etc.) for different types of build.
While inside the `build` directory, configure your build by running CMake. Before the first run you need to define environment variables that specify compiler (version 7 gcc compiler in this example).
```
export CC=gcc-7 CXX=g++-7
cmake ..
```
The `CC` variable specifies the compiler for C (short for C Compiler), and `CXX` variable instructs which C++ compiler is to be used for building.
For a faster build you can resort to the `debug` build type - a build with no optimizations. For that supply the following parameter `-D CMAKE_BUILD_TYPE=Debug`:
```
cmake -D CMAKE_BUILD_TYPE=Debug ..
```
You can change the type of build by running this command in the `build` directory.
Run ninja to build:
```
ninja clickhouse-server clickhouse-client
```
Only the required binaries are going to be built in this example.
If you require to build all the binaries (utilities and tests), you should run ninja with no parameters:
```
ninja
```
Full build requires about 30GB of free disk space or 15GB to build the main binaries.
When large amount of RAM is available on build machine you should limit the number of build tasks run in parallel with `-j` param:
```
ninja -j 1 clickhouse-server clickhouse-client
```
On machines with 4GB of RAM it is recommended to specify 1, for 8GB of RAM `-j 2` is recommended.
If you get the message: `ninja: error: loading 'build.ninja': No such file or directory`, it means that generating a build configuration has failed and you need to inspect the message above.
Upon successful start of the building process you'll see the build progress - the number of processed tasks and the total number of tasks.
While building messages about protobuf files in libhdfs2 library like `libprotobuf WARNING` may show up. They affect nothing and are safe to be ignored.
Upon successful build you get an executable file `ClickHouse/<build_dir>/dbms/programs/clickhouse`:
```
ls -l dbms/programs/clickhouse
```
# Running the built executable of ClickHouse
To run the server under the current user you need to navigate to `ClickHouse/dbms/programs/server/` (located outside of `build`) and run:
```
../../../build/dbms/programs/clickhouse server
```
In this case ClickHouse will use config files located in the current directory. You can run `clickhouse server` from any directory specifying the path to a config file as a command line parameter `--config-file`.
To connect to ClickHouse with clickhouse-client in another terminal navigate to `ClickHouse/build/dbms/programs/` and run `clickhouse client`.
If you get `Connection refused` message on Mac OS X or FreeBSD, try specifying host address 127.0.0.1:
```
clickhouse client --host 127.0.0.1
```
You can replace production version of ClickHouse binary installed in your system with your custom built ClickHouse binary. To do that install ClickHouse on your machine following the instructions from the official website. Next, run the following:
```
sudo service clickhouse-server stop
sudo cp ClickHouse/build/dbms/programs/clickhouse /usr/bin/
sudo service clickhouse-server start
```
Note that `clickhouse-client`, `clickhouse-server` and others are symlinks to the commonly shared `clickhouse` binary.
You can also run your custom built ClickHouse binary with the config file from the ClickHouse package installed on your system:
```
sudo service clickhouse-server stop
sudo -u clickhouse ClickHouse/build/dbms/programs/clickhouse server --config-file /etc/clickhouse-server/config.xml
```
# IDE (Integrated Development Environment)
If you do not know which IDE to use, we recommend that you use CLion. CLion is a commercial software, but it offers 30 day free trial period. It is also free of charge for students. CLion can be used both on Linux and on Mac OS X.
KDevelop and QTCreator are another great alternatives of an IDE for developing ClickHouse. KDevelop comes in as a very handy IDE although unstable. If KDevelop crashes after a while upon opening project, you should click "Stop All" button as soon as it has opened the list of project's files. After doing so KDevelop should be fine to work with.
As simple code editors you can use Sublime Text or Visual Studio Code, or Kate (all of which are available on Linux).
Just in case, it is worth mentioning that CLion creates by itself its own `build` path, it also selects by itself `debug` for build type, for configuration it uses a version of CMake that is defined in CLion and not the one installed by you, and finally CLion will use `make` to run build tasks instead of `ninja`. This is a normal behaviour, just keep that in mind to avoid confusion.
# Writing Code
The description of ClickHouse architecture can be found here: https://clickhouse.yandex/docs/en/development/architecture/
The Code Style Guide: https://clickhouse.yandex/docs/en/development/style/
Writing tests: https://clickhouse.yandex/docs/en/development/tests/
List of tasks: https://github.com/yandex/ClickHouse/blob/master/dbms/tests/instructions/easy_tasks_sorted_en.md
# Test Data
Developing ClickHouse often requires loading realistic datasets. It is particularly important for performance testing. We have a specially prepared set of anonymized data from Yandex.Metrica. It requires additionally some 3GB of free disk space. Note that this data is not required to accomplish most of development tasks.
```
sudo apt install wget xz-utils
wget https://clickhouse-datasets.s3.yandex.net/hits/tsv/hits_v1.tsv.xz
wget https://clickhouse-datasets.s3.yandex.net/visits/tsv/visits_v1.tsv.xz
xz -v -d hits_v1.tsv.xz
xz -v -d visits_v1.tsv.xz
clickhouse-client
CREATE TABLE test.hits ( WatchID UInt64, JavaEnable UInt8, Title String, GoodEvent Int16, EventTime DateTime, EventDate Date, CounterID UInt32, ClientIP UInt32, ClientIP6 FixedString(16), RegionID UInt32, UserID UInt64, CounterClass Int8, OS UInt8, UserAgent UInt8, URL String, Referer String, URLDomain String, RefererDomain String, Refresh UInt8, IsRobot UInt8, RefererCategories Array(UInt16), URLCategories Array(UInt16), URLRegions Array(UInt32), RefererRegions Array(UInt32), ResolutionWidth UInt16, ResolutionHeight UInt16, ResolutionDepth UInt8, FlashMajor UInt8, FlashMinor UInt8, FlashMinor2 String, NetMajor UInt8, NetMinor UInt8, UserAgentMajor UInt16, UserAgentMinor FixedString(2), CookieEnable UInt8, JavascriptEnable UInt8, IsMobile UInt8, MobilePhone UInt8, MobilePhoneModel String, Params String, IPNetworkID UInt32, TraficSourceID Int8, SearchEngineID UInt16, SearchPhrase String, AdvEngineID UInt8, IsArtifical UInt8, WindowClientWidth UInt16, WindowClientHeight UInt16, ClientTimeZone Int16, ClientEventTime DateTime, SilverlightVersion1 UInt8, SilverlightVersion2 UInt8, SilverlightVersion3 UInt32, SilverlightVersion4 UInt16, PageCharset String, CodeVersion UInt32, IsLink UInt8, IsDownload UInt8, IsNotBounce UInt8, FUniqID UInt64, HID UInt32, IsOldCounter UInt8, IsEvent UInt8, IsParameter UInt8, DontCountHits UInt8, WithHash UInt8, HitColor FixedString(1), UTCEventTime DateTime, Age UInt8, Sex UInt8, Income UInt8, Interests UInt16, Robotness UInt8, GeneralInterests Array(UInt16), RemoteIP UInt32, RemoteIP6 FixedString(16), WindowName Int32, OpenerName Int32, HistoryLength Int16, BrowserLanguage FixedString(2), BrowserCountry FixedString(2), SocialNetwork String, SocialAction String, HTTPError UInt16, SendTiming Int32, DNSTiming Int32, ConnectTiming Int32, ResponseStartTiming Int32, ResponseEndTiming Int32, FetchTiming Int32, RedirectTiming Int32, DOMInteractiveTiming Int32, DOMContentLoadedTiming Int32, DOMCompleteTiming Int32, LoadEventStartTiming Int32, LoadEventEndTiming Int32, NSToDOMContentLoadedTiming Int32, FirstPaintTiming Int32, RedirectCount Int8, SocialSourceNetworkID UInt8, SocialSourcePage String, ParamPrice Int64, ParamOrderID String, ParamCurrency FixedString(3), ParamCurrencyID UInt16, GoalsReached Array(UInt32), OpenstatServiceName String, OpenstatCampaignID String, OpenstatAdID String, OpenstatSourceID String, UTMSource String, UTMMedium String, UTMCampaign String, UTMContent String, UTMTerm String, FromTag String, HasGCLID UInt8, RefererHash UInt64, URLHash UInt64, CLID UInt32, YCLID UInt64, ShareService String, ShareURL String, ShareTitle String, `ParsedParams.Key1` Array(String), `ParsedParams.Key2` Array(String), `ParsedParams.Key3` Array(String), `ParsedParams.Key4` Array(String), `ParsedParams.Key5` Array(String), `ParsedParams.ValueDouble` Array(Float64), IslandID FixedString(16), RequestNum UInt32, RequestTry UInt8) ENGINE = MergeTree PARTITION BY toYYYYMM(EventDate) SAMPLE BY intHash32(UserID) ORDER BY (CounterID, EventDate, intHash32(UserID), EventTime);
CREATE TABLE test.visits ( CounterID UInt32, StartDate Date, Sign Int8, IsNew UInt8, VisitID UInt64, UserID UInt64, StartTime DateTime, Duration UInt32, UTCStartTime DateTime, PageViews Int32, Hits Int32, IsBounce UInt8, Referer String, StartURL String, RefererDomain String, StartURLDomain String, EndURL String, LinkURL String, IsDownload UInt8, TraficSourceID Int8, SearchEngineID UInt16, SearchPhrase String, AdvEngineID UInt8, PlaceID Int32, RefererCategories Array(UInt16), URLCategories Array(UInt16), URLRegions Array(UInt32), RefererRegions Array(UInt32), IsYandex UInt8, GoalReachesDepth Int32, GoalReachesURL Int32, GoalReachesAny Int32, SocialSourceNetworkID UInt8, SocialSourcePage String, MobilePhoneModel String, ClientEventTime DateTime, RegionID UInt32, ClientIP UInt32, ClientIP6 FixedString(16), RemoteIP UInt32, RemoteIP6 FixedString(16), IPNetworkID UInt32, SilverlightVersion3 UInt32, CodeVersion UInt32, ResolutionWidth UInt16, ResolutionHeight UInt16, UserAgentMajor UInt16, UserAgentMinor UInt16, WindowClientWidth UInt16, WindowClientHeight UInt16, SilverlightVersion2 UInt8, SilverlightVersion4 UInt16, FlashVersion3 UInt16, FlashVersion4 UInt16, ClientTimeZone Int16, OS UInt8, UserAgent UInt8, ResolutionDepth UInt8, FlashMajor UInt8, FlashMinor UInt8, NetMajor UInt8, NetMinor UInt8, MobilePhone UInt8, SilverlightVersion1 UInt8, Age UInt8, Sex UInt8, Income UInt8, JavaEnable UInt8, CookieEnable UInt8, JavascriptEnable UInt8, IsMobile UInt8, BrowserLanguage UInt16, BrowserCountry UInt16, Interests UInt16, Robotness UInt8, GeneralInterests Array(UInt16), Params Array(String), `Goals.ID` Array(UInt32), `Goals.Serial` Array(UInt32), `Goals.EventTime` Array(DateTime), `Goals.Price` Array(Int64), `Goals.OrderID` Array(String), `Goals.CurrencyID` Array(UInt32), WatchIDs Array(UInt64), ParamSumPrice Int64, ParamCurrency FixedString(3), ParamCurrencyID UInt16, ClickLogID UInt64, ClickEventID Int32, ClickGoodEvent Int32, ClickEventTime DateTime, ClickPriorityID Int32, ClickPhraseID Int32, ClickPageID Int32, ClickPlaceID Int32, ClickTypeID Int32, ClickResourceID Int32, ClickCost UInt32, ClickClientIP UInt32, ClickDomainID UInt32, ClickURL String, ClickAttempt UInt8, ClickOrderID UInt32, ClickBannerID UInt32, ClickMarketCategoryID UInt32, ClickMarketPP UInt32, ClickMarketCategoryName String, ClickMarketPPName String, ClickAWAPSCampaignName String, ClickPageName String, ClickTargetType UInt16, ClickTargetPhraseID UInt64, ClickContextType UInt8, ClickSelectType Int8, ClickOptions String, ClickGroupBannerID Int32, OpenstatServiceName String, OpenstatCampaignID String, OpenstatAdID String, OpenstatSourceID String, UTMSource String, UTMMedium String, UTMCampaign String, UTMContent String, UTMTerm String, FromTag String, HasGCLID UInt8, FirstVisit DateTime, PredLastVisit Date, LastVisit Date, TotalVisits UInt32, `TraficSource.ID` Array(Int8), `TraficSource.SearchEngineID` Array(UInt16), `TraficSource.AdvEngineID` Array(UInt8), `TraficSource.PlaceID` Array(UInt16), `TraficSource.SocialSourceNetworkID` Array(UInt8), `TraficSource.Domain` Array(String), `TraficSource.SearchPhrase` Array(String), `TraficSource.SocialSourcePage` Array(String), Attendance FixedString(16), CLID UInt32, YCLID UInt64, NormalizedRefererHash UInt64, SearchPhraseHash UInt64, RefererDomainHash UInt64, NormalizedStartURLHash UInt64, StartURLDomainHash UInt64, NormalizedEndURLHash UInt64, TopLevelDomain UInt64, URLScheme UInt64, OpenstatServiceNameHash UInt64, OpenstatCampaignIDHash UInt64, OpenstatAdIDHash UInt64, OpenstatSourceIDHash UInt64, UTMSourceHash UInt64, UTMMediumHash UInt64, UTMCampaignHash UInt64, UTMContentHash UInt64, UTMTermHash UInt64, FromHash UInt64, WebVisorEnabled UInt8, WebVisorActivity UInt32, `ParsedParams.Key1` Array(String), `ParsedParams.Key2` Array(String), `ParsedParams.Key3` Array(String), `ParsedParams.Key4` Array(String), `ParsedParams.Key5` Array(String), `ParsedParams.ValueDouble` Array(Float64), `Market.Type` Array(UInt8), `Market.GoalID` Array(UInt32), `Market.OrderID` Array(String), `Market.OrderPrice` Array(Int64), `Market.PP` Array(UInt32), `Market.DirectPlaceID` Array(UInt32), `Market.DirectOrderID` Array(UInt32), `Market.DirectBannerID` Array(UInt32), `Market.GoodID` Array(String), `Market.GoodName` Array(String), `Market.GoodQuantity` Array(Int32), `Market.GoodPrice` Array(Int64), IslandID FixedString(16)) ENGINE = CollapsingMergeTree(Sign) PARTITION BY toYYYYMM(StartDate) SAMPLE BY intHash32(UserID) ORDER BY (CounterID, StartDate, intHash32(UserID), VisitID);
clickhouse-client --max_insert_block_size 100000 --query "INSERT INTO test.hits FORMAT TSV" < hits_v1.tsv
clickhouse-client --max_insert_block_size 100000 --query "INSERT INTO test.visits FORMAT TSV" < visits_v1.tsv
```
# Creating Pull Request
Navigate to your fork repository in GitHub's UI. If you have been developing in a branch, you need to select that branch. There will be a "Pull request" button located on the screen. In essence this means "create a request for accepting my changes into the main repository".
A pull request can be created even if the work is not completed yet. In this case please put the word "WIP" (work in progress) at the beginning of the title, it can be changed later. This is useful for cooperative reviewing and discussion of changes as well as for running all of the available tests. It is important that you provide a brief description of your changes, it will later be used for generating realease changelogs.
Testing will commence as soon as Yandex employees label your PR with a tag "can be tested". The results of some first checks (e.g. code style) will come in within several minutes. Build check results will arrive within a half an hour. And the main set of tests will report itself within an hour.
The system will prepare ClickHouse binary builds for your pull request individually. To retrieve these builds click the "Details" link next to "ClickHouse build check" entry in the list of checks. There you will find direct links to the built .deb packages of ClickHouse which you can deploy even on your production servers (if you have no fear).
Most probably some of the builds will fail at first times. This is due to the fact that we check builds both with gcc as well as with clang, with almost all of existing warnings (always with the `-Werror` flag) enabled for clang. On that same page you can find all of the build logs so that you do not have to build ClickHouse in all of the possible ways.

0
dbms/tests/integration/test_old_versions_client/__init__.py → dbms/tests/integration/test_old_versions/__init__.py
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<yandex>
<remote_servers>
<test_cluster>
<shard>
<weight>1</weight>
<replica>
<host>node_new</host>
<port>9000</port>
</replica>
</shard>
</test_cluster>
</remote_servers>
</yandex>

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import time
import os
import pytest
from helpers.cluster import ClickHouseCluster
from multiprocessing.dummy import Pool
from helpers.client import QueryRuntimeException, QueryTimeoutExceedException
from helpers.test_tools import assert_eq_with_retry
cluster = ClickHouseCluster(__file__)
node18_14 = cluster.add_instance('node18_14', image='yandex/clickhouse-server:18.14.19', with_installed_binary=True, config_dir="configs")
node19_1 = cluster.add_instance('node19_1', image='yandex/clickhouse-server:19.1.16', with_installed_binary=True, config_dir="configs")
node19_4 = cluster.add_instance('node19_4', image='yandex/clickhouse-server:19.4.5.35', with_installed_binary=True, config_dir="configs")
node19_8 = cluster.add_instance('node19_8', image='yandex/clickhouse-server:19.8.3.8', with_installed_binary=True, config_dir="configs")
node19_11 = cluster.add_instance('node19_11', image='yandex/clickhouse-server:19.11.13.74', with_installed_binary=True, config_dir="configs")
node19_13 = cluster.add_instance('node19_13', image='yandex/clickhouse-server:19.13.7.57', with_installed_binary=True, config_dir="configs")
node19_16 = cluster.add_instance('node19_16', image='yandex/clickhouse-server:19.16.2.2', with_installed_binary=True, config_dir="configs")
old_nodes = [node18_14, node19_1, node19_4, node19_8, node19_11, node19_13, node19_16]
new_node = cluster.add_instance('node_new')
def query_from_one_node_to_another(client_node, server_node, query):
client_node.exec_in_container(["bash", "-c", "/usr/bin/clickhouse client --host {} --query {!r}".format(server_node.name, query)])
@pytest.fixture(scope="module")
def setup_nodes():
try:
cluster.start()
for n in old_nodes + [new_node]:
n.query('''CREATE TABLE test_table (id UInt32, value UInt64) ENGINE = MergeTree() ORDER BY tuple()''')
for n in old_nodes:
n.query('''CREATE TABLE dist_table AS test_table ENGINE = Distributed('test_cluster', 'default', 'test_table')''')
yield cluster
finally:
cluster.shutdown()
def test_client_is_older_than_server(setup_nodes):
server = new_node
for i, client in enumerate(old_nodes):
query_from_one_node_to_another(client, server, "INSERT INTO test_table VALUES (1, {})".format(i))
for client in old_nodes:
query_from_one_node_to_another(client, server, "SELECT COUNT() FROM test_table")
assert server.query("SELECT COUNT() FROM test_table WHERE id=1") == str(len(old_nodes)) + "\n"
def test_server_is_older_than_client(setup_nodes):
client = new_node
for i, server in enumerate(old_nodes):
query_from_one_node_to_another(client, server, "INSERT INTO test_table VALUES (2, {})".format(i))
for server in old_nodes:
query_from_one_node_to_another(client, server, "SELECT COUNT() FROM test_table")
for server in old_nodes:
assert server.query("SELECT COUNT() FROM test_table WHERE id=2") == "1\n"
def test_distributed_query_initiator_is_older_than_shard(setup_nodes):
distributed_query_initiator_old_nodes = [node18_14, node19_13, node19_16]
shard = new_node
for i, initiator in enumerate(distributed_query_initiator_old_nodes):
initiator.query("INSERT INTO dist_table VALUES (3, {})".format(i))
assert_eq_with_retry(shard, "SELECT COUNT() FROM test_table WHERE id=3", str(len(distributed_query_initiator_old_nodes)))
assert_eq_with_retry(initiator, "SELECT COUNT() FROM dist_table WHERE id=3", str(len(distributed_query_initiator_old_nodes)))

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dbms/tests/integration/test_old_versions_client/test.py
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import time
import pytest
from helpers.cluster import ClickHouseCluster
from multiprocessing.dummy import Pool
from helpers.client import QueryRuntimeException, QueryTimeoutExceedException
from helpers.test_tools import assert_eq_with_retry
cluster = ClickHouseCluster(__file__)
node18_14 = cluster.add_instance('node18_14', image='yandex/clickhouse-server:18.14.19', with_installed_binary=True)
node19_1 = cluster.add_instance('node19_1', image='yandex/clickhouse-server:19.1.16', with_installed_binary=True)
node19_4 = cluster.add_instance('node19_4', image='yandex/clickhouse-server:19.4.5.35', with_installed_binary=True)
node19_6 = cluster.add_instance('node19_6', image='yandex/clickhouse-server:19.6.3.18', with_installed_binary=True)
node19_8 = cluster.add_instance('node19_8', image='yandex/clickhouse-server:19.8.3.8', with_installed_binary=True)
node_new = cluster.add_instance('node_new')
@pytest.fixture(scope="module")
def setup_nodes():
try:
cluster.start()
for n in (node18_14, node19_1, node19_4, node19_6, node19_8, node_new):
n.query('''CREATE TABLE test_table (id UInt32, value UInt64) ENGINE = MergeTree() ORDER BY tuple()''')
yield cluster
finally:
cluster.shutdown()
def query_from_one_node_to_another(client_node, server_node, query):
client_node.exec_in_container(["bash", "-c", "/usr/bin/clickhouse client --host {} --query '{}'".format(server_node.name, query)])
def test_client_from_different_versions(setup_nodes):
old_nodes = (node18_14, node19_1, node19_4, node19_6, node19_8)
# from new to old
for n in old_nodes:
query_from_one_node_to_another(node_new, n, "INSERT INTO test_table VALUES (1, 1)")
for n in old_nodes:
query_from_one_node_to_another(node_new, n, "SELECT COUNT() FROM test_table")
for n in old_nodes:
assert n.query("SELECT COUNT() FROM test_table") == "1\n"
# from old to new
for i, n in enumerate(old_nodes):
query_from_one_node_to_another(n, node_new, "INSERT INTO test_table VALUES ({i}, {i})".format(i=i))
for n in old_nodes:
query_from_one_node_to_another(n, node_new, "SELECT COUNT() FROM test_table")
assert node_new.query("SELECT COUNT() FROM test_table") == str(len(old_nodes)) + "\n"

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31
dbms/tests/integration/test_user_zero_database_access/configs/config.xml Normal file
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@ -0,0 +1,31 @@
<?xml version="1.0"?>
<yandex>
<logger>
<level>trace</level>
<log>/var/log/clickhouse-server/clickhouse-server.log</log>
<errorlog>/var/log/clickhouse-server/clickhouse-server.err.log</errorlog>
<size>1000M</size>
<count>10</count>
</logger>
<tcp_port>9000</tcp_port>
<listen_host>127.0.0.1</listen_host>
<openSSL>
<client>
<cacheSessions>true</cacheSessions>
<verificationMode>none</verificationMode>
<invalidCertificateHandler>
<name>AcceptCertificateHandler</name>
</invalidCertificateHandler>
</client>
</openSSL>
<max_concurrent_queries>500</max_concurrent_queries>
<mark_cache_size>5368709120</mark_cache_size>
<path>./clickhouse/</path>
<users_config>users.xml</users_config>
<max_table_size_to_drop>1</max_table_size_to_drop>
<max_partition_size_to_drop>1</max_partition_size_to_drop>
</yandex>

46
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@ -0,0 +1,46 @@
<?xml version="1.0"?>
<yandex>
<profiles>
<default>
</default>
</profiles>
<users>
<default>
<password></password>
<networks incl="networks" replace="replace">
<ip>::/0</ip>
</networks>
<profile>default</profile>
<quota>default</quota>
</default>
<no_access>
<password></password>
<networks incl="networks" replace="replace">
<ip>::/0</ip>
</networks>
<profile>default</profile>
<quota>default</quota>
<allow_databases></allow_databases>
</no_access>
<has_access>
<password></password>
<networks incl="networks" replace="replace">
<ip>::/0</ip>
</networks>
<profile>default</profile>
<quota>default</quota>
<allow_databases>
<database>test</database>
<database>db1</database>
</allow_databases>
</has_access>
</users>
<quotas>
<default>
</default>
</quotas>
</yandex>

64
dbms/tests/integration/test_user_zero_database_access/test_user_zero_database_access.py Normal file
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@ -0,0 +1,64 @@
import time
import pytest
from helpers.cluster import ClickHouseCluster
cluster = ClickHouseCluster(__file__)
node = cluster.add_instance('node', config_dir="configs")
@pytest.fixture(scope="module")
def start_cluster():
try:
cluster.start()
node.query("CREATE DATABASE test;")
yield cluster
finally:
cluster.shutdown()
def test_user_zero_database_access(start_cluster):
try:
node.exec_in_container(["bash", "-c", "/usr/bin/clickhouse client --user 'no_access' --query 'DROP DATABASE test'"], user='root')
assert False, "user with no access rights dropped database test"
except AssertionError:
raise
except Exception as ex:
print ex
try:
node.exec_in_container(["bash", "-c", "/usr/bin/clickhouse client --user 'has_access' --query 'DROP DATABASE test'"], user='root')
except Exception as ex:
assert False, "user with access rights can't drop database test"
try:
node.exec_in_container(["bash", "-c", "/usr/bin/clickhouse client --user 'has_access' --query 'CREATE DATABASE test'"], user='root')
except Exception as ex:
assert False, "user with access rights can't create database test"
try:
node.exec_in_container(["bash", "-c", "/usr/bin/clickhouse client --user 'no_access' --query 'CREATE DATABASE test2'"], user='root')
assert False, "user with no access rights created database test2"
except AssertionError:
raise
except Exception as ex:
print ex
try:
node.exec_in_container(["bash", "-c", "/usr/bin/clickhouse client --user 'has_access' --query 'CREATE DATABASE test2'"], user='root')
assert False, "user with limited access rights created database test2 which is outside of his scope of rights"
except AssertionError:
raise
except Exception as ex:
print ex
try:
node.exec_in_container(["bash", "-c", "/usr/bin/clickhouse client --user 'default' --query 'CREATE DATABASE test2'"], user='root')
except Exception as ex:
assert False, "user with full access rights can't create database test2"
try:
node.exec_in_container(["bash", "-c", "/usr/bin/clickhouse client --user 'default' --query 'DROP DATABASE test2'"], user='root')
except Exception as ex:
assert False, "user with full access rights can't drop database test2"

17
dbms/tests/performance/modulo.xml Normal file
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@ -0,0 +1,17 @@
<test>
<type>loop</type>
<stop_conditions>
<any_of>
<iterations>10</iterations>
</any_of>
</stop_conditions>
<main_metric>
<min_time />
</main_metric>
<query>SELECT number % 128 FROM numbers(300000000) FORMAT Null</query>
<query>SELECT number % 255 FROM numbers(300000000) FORMAT Null</query>
<query>SELECT number % 256 FROM numbers(300000000) FORMAT Null</query>
</test>

3
dbms/tests/queries/0_stateless/00930_arrayIntersect.reference
View File

@ -46,3 +46,6 @@
[]
[]
[]
-
[]
[]

3
dbms/tests/queries/0_stateless/00930_arrayIntersect.sql
View File

@ -25,3 +25,6 @@ select arrayIntersect([], []) from array_intersect order by arr;
drop table if exists array_intersect;
select '-';
select arrayIntersect([-100], [156]);
select arrayIntersect([1], [257]);

2
dbms/tests/queries/0_stateless/00974_full_outer_join.sql
View File

@ -1,7 +1,7 @@
SELECT
q0.dt,
q0.cnt,
q0.cnt2
q1.cnt2
FROM
(
SELECT

30
dbms/tests/queries/0_stateless/01034_order_by_pk_prefix.reference Normal file
View File

@ -0,0 +1,30 @@
0 0
0 0
0 0
1 1
1 1
1 1
2 2
2 4
2 4
3 3
3 9
3 9
4 16
4 16
4 4
5 25
5 25
5 5
6 36
6 36
6 6
7 49
7 49
7 7
8 64
8 64
8 8
9 81
9 81
9 9

12
dbms/tests/queries/0_stateless/01034_order_by_pk_prefix.sql Normal file
View File

@ -0,0 +1,12 @@
DROP TABLE IF EXISTS test_table;
CREATE TABLE test_table (n Int32, s String)
ENGINE = MergeTree() PARTITION BY n % 10 ORDER BY n;
INSERT INTO test_table SELECT number, toString(number) FROM system.numbers LIMIT 100;
INSERT INTO test_table SELECT number, toString(number * number) FROM system.numbers LIMIT 100;
INSERT INTO test_table SELECT number, toString(number * number) FROM system.numbers LIMIT 100;
SELECT * FROM test_table ORDER BY n, s LIMIT 30;
DROP TABLE test_table;

1
dbms/tests/queries/0_stateless/01034_unknown_qualified_column_in_join.reference Normal file
View File

@ -0,0 +1 @@
1 3

3
dbms/tests/queries/0_stateless/01034_unknown_qualified_column_in_join.sql Normal file
View File

@ -0,0 +1,3 @@
SELECT l.c FROM (SELECT 1 AS a, 2 AS b) AS l join (SELECT 2 AS b, 3 AS c) AS r USING b; -- { serverError 47 }
SELECT r.a FROM (SELECT 1 AS a, 2 AS b) AS l join (SELECT 2 AS b, 3 AS c) AS r USING b; -- { serverError 47 }
SELECT l.a, r.c FROM (SELECT 1 AS a, 2 AS b) AS l join (SELECT 2 AS b, 3 AS c) AS r USING b;

8
dbms/tests/queries/0_stateless/01034_with_fill_and_push_down_predicate.reference Normal file
View File

@ -0,0 +1,8 @@
2019-11-14 22:15:00
2019-11-14 22:30:00
2019-11-14 22:45:00
2019-11-14 23:00:00
2019-11-14 23:15:00
2019-11-14 23:30:00
2019-11-14 23:45:00
2019-11-15 00:00:00

1
dbms/tests/queries/0_stateless/01034_with_fill_and_push_down_predicate.sql Normal file
View File

@ -0,0 +1 @@
SELECT * FROM ( SELECT date_time FROM ( SELECT toDateTime('2019-11-14 22:15:00') AS date_time UNION ALL SELECT toDateTime('2019-11-15 01:15:00') AS date_time ) ORDER BY date_time WITH fill step 900 ) WHERE date_time < toDateTime('2019-11-15 00:15:00')

16
docs/en/interfaces/cli.md
View File

@ -1,17 +1,23 @@
# Command-line Client
To work from the command line, you can use `clickhouse-client`:
ClickHouse provides the native command line client `clickhouse-client`. The client supports command-line options and configuration files. For more information, see "[Configuring](#interfaces_cli_configuration)".
[Install](../getting_started/index.md) it by the `clickhouse-client` package and run it by the command `clickhouse-client`.
```bash
$ clickhouse-client
ClickHouse client version 0.0.26176.
Connecting to localhost:9000.
Connected to ClickHouse server version 0.0.26176.
ClickHouse client version 19.17.1.1579 (official build).
Connecting to localhost:9000 as user default.
Connected to ClickHouse server version 19.17.1 revision 54428.
:)
```
The client supports command-line options and configuration files. For more information, see "[Configuring](#interfaces_cli_configuration)".
Different versions of client and server are compatible, but some features may be disabled for older clients. We don't recommend using different versions of the client and the server app. When you try to use the client of the older version, then the server, `clickhouse-client` displays the message:
```
ClickHouse client version is older than ClickHouse server. It may lack support for new features.
```
## Usage {#cli_usage}

13
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View File

@ -76,6 +76,7 @@ Features:
[clickhouse-cli](https://github.com/hatarist/clickhouse-cli) is an alternative command line client for ClickHouse, written in Python 3.
Features:
- Autocompletion.
- Syntax highlighting for the queries and data output.
- Pager support for the data output.
@ -87,6 +88,18 @@ Features:
## Commercial
### Holistics Software
[Holistics](https://www.holistics.io/) was listed by Gartner's Frontrunners in 2019 as one of the top 2 highest ranked business intelligence tools globally for usability. Holistics is a full-stack data platform and business intelligence tool for setting up your analytics processes, built on SQL.
Features:
- Automated email, Slack and Google Sheet schedules of reports.
- Powerful SQL editor with visualizations, version control, auto-completion, reusable query components and dynamic filters.
- Embedded analytics of reports and dashboards via iframe.
- Data preparation and ETL capabilities.
- SQL data modeling support for relational mapping of data.
### DataGrip
[DataGrip](https://www.jetbrains.com/datagrip/) is a database IDE from JetBrains with dedicated support for ClickHouse. It is also embedded into other IntelliJ-based tools: PyCharm, IntelliJ IDEA, GoLand, PhpStorm and others.

26
docs/en/operations/server_settings/settings.md
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@ -556,13 +556,13 @@ The path to the directory containing data.
Setting for logging queries received with the [log_queries=1](../settings/settings.md) setting.
Queries are logged in the [system.query_log](../system_tables.md#system_tables-query-log) table, not in a separate file. You can change the name of the table in the `table` parameter (see below).
Queries are logged in the [system.query_log](../system_tables.md#system_tables-query_log) table, not in a separate file. You can change the name of the table in the `table` parameter (see below).
Use the following parameters to configure logging:
- `database` – Name of the database.
- `table` – Name of the system table the queries will be logged in.
- `partition_by` – Sets a [custom partitioning key](../../operations/table_engines/custom_partitioning_key.md) for a system table.
- `partition_by` – Sets a [custom partitioning key](../../operations/table_engines/custom_partitioning_key.md) for a table.
- `flush_interval_milliseconds` – Interval for flushing data from the buffer in memory to the table.
If the table doesn't exist, ClickHouse will create it. If the structure of the query log changed when the ClickHouse server was updated, the table with the old structure is renamed, and a new table is created automatically.
@ -578,6 +578,28 @@ If the table doesn't exist, ClickHouse will create it. If the structure of the q
</query_log>
```
## trace_log {#server_settings-trace_log}
Settings for the [trace_log](../system_tables.md#system_tables-trace_log) system table operation.
Parameters:
- `database` — Database for storing a table.
- `table` — Table name.
- `partition_by` — [Custom partitioning key](../../operations/table_engines/custom_partitioning_key.md) for a system table.
- `flush_interval_milliseconds` — Interval for flushing data from the buffer in memory to the table.
The default server configuration file `config.xml` contains the following settings section:
```xml
<trace_log>
<database>system</database>
<table>trace_log</table>
<partition_by>toYYYYMM(event_date)</partition_by>
<flush_interval_milliseconds>7500</flush_interval_milliseconds>
</trace_log>
```
## query_masking_rules
Regexp-based rules, which will be applied to queries as well as all log messages before storing them in server logs,

46
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@ -395,7 +395,7 @@ Columns:
- `query` (String) – The query text. For `INSERT`, it doesn't include the data to insert.
- `query_id` (String) – Query ID, if defined.
## system.query_log {#system_tables-query-log}
## system.query_log {#system_tables-query_log}
Contains information about execution of queries. For each query, you can see processing start time, duration of processing, error messages and other information.
@ -485,6 +485,50 @@ When the table is deleted manually, it will be automatically created on the fly.
You can specify an arbitrary partitioning key for the `system.query_log` table in the [query_log](server_settings/settings.md#server_settings-query-log) server setting (see the `partition_by` parameter).
## system.trace_log {#system_tables-trace_log}
Contains stack traces collected by the sampling query profiler.
ClickHouse creates this table when the [trace_log](server_settings/settings.md#server_settings-trace_log) server configuration section is set. Also the `query_profiler_real_time_period_ns` and `query_profiler_cpu_time_period_ns` settings should be set.
To analyze logs, use the `addressToLine`, `addressToSymbol` and `demangle` introspection functions.
Columns:
- `event_date`([Date](../data_types/date.md)) — Date of sampling moment.
- `event_time`([DateTime](../data_types/datetime.md)) — Timestamp of sampling moment.
- `revision`([UInt32](../data_types/int_uint.md)) — ClickHouse server build revision.
When connecting to server by `clickhouse-client`, you see the string similar to `Connected to ClickHouse server version 19.18.1 revision 54429.`. This field contains the `revision`, but not the `version` of a server.
- `timer_type`([Enum8](../data_types/enum.md)) — Timer type:
- `Real` represents wall-clock time.
- `CPU` represents CPU time.
- `thread_number`([UInt32](../data_types/int_uint.md)) — Thread identifier.
- `query_id`([String](../data_types/string.md)) — Query identifier that can be used to get details about a query that was running from the [query_log](#system_tables-query_log) system table.
- `trace`([Array(UInt64)](../data_types/array.md)) — Stack trace at the moment of sampling. Each element is a virtual memory address inside ClickHouse server process.
**Example**
```sql
SELECT * FROM system.trace_log LIMIT 1 \G
```
```text
Row 1:
──────
event_date: 2019-11-15
event_time: 2019-11-15 15:09:38
revision: 54428
timer_type: Real
thread_number: 48
query_id: acc4d61f-5bd1-4a3e-bc91-2180be37c915
trace: [94222141367858,94222152240175,94222152325351,94222152329944,94222152330796,94222151449980,94222144088167,94222151682763,94222144088167,94222151682763,94222144088167,94222144058283,94222144059248,94222091840750,94222091842302,94222091831228,94222189631488,140509950166747,140509942945935]
```
## system.replicas {#system_tables-replicas}
Contains information and status for replicated tables residing on the local server.

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@ -189,7 +189,8 @@ The following operations with [partitions](../operations/table_engines/custom_pa
- [DETACH PARTITION](#alter_detach-partition) – Moves a partition to the `detached` directory and forget it.
- [DROP PARTITION](#alter_drop-partition) – Deletes a partition.
- [ATTACH PART|PARTITION](#alter_attach-partition) – Adds a part or partition from the `detached` directory to the table.
- [REPLACE PARTITION](#alter_replace-partition) - Copies the data partition from one table to another.
- [ATTACH PARTITION FROM](#alter_attach-partition-from) – Copies the data partition from one table to another and adds.
- [REPLACE PARTITION](#alter_replace-partition) - Copies the data partition from one table to another and replaces.
- [CLEAR COLUMN IN PARTITION](#alter_clear-column-partition) - Resets the value of a specified column in a partition.
- [CLEAR INDEX IN PARTITION](#alter_clear-index-partition) - Resets the specified secondary index in a partition.
- [FREEZE PARTITION](#alter_freeze-partition) – Creates a backup of a partition.
@ -256,13 +257,26 @@ This query is replicated. Each replica checks whether there is data in the `deta
So you can put data to the `detached` directory on one replica, and use the `ALTER ... ATTACH` query to add it to the table on all replicas.
#### ATTACH PARTITION FROM {#alter_attach-partition-from}
```sql
ALTER TABLE table2 ATTACH PARTITION partition_expr FROM table1
```
This query copies the data partition from the `table1` to `table2` adds data to exsisting in the `table2`. Note that data won't be deleted from `table1`.
For the query to run successfully, the following conditions must be met:
- Both tables must have the same structure.
- Both tables must have the same partition key.
#### REPLACE PARTITION {#alter_replace-partition}
```sql
ALTER TABLE table2 REPLACE PARTITION partition_expr FROM table1
```
This query copies the data partition from the `table1` to `table2`. Note that data won't be deleted from `table1`.
This query copies the data partition from the `table1` to `table2` and replaces existing partition in the `table2`. Note that data won't be deleted from `table1`.
For the query to run successfully, the following conditions must be met:

16
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@ -772,6 +772,22 @@ SELECT arrayReduce('uniqUpTo(3)', [1, 2, 3, 4, 5, 6, 7, 8, 9, 10])
└─────────────────────────────────────────────────────────────┘
```
## arrayFlatten(arr) {#array_functions-arrayflatten}
The `arrayFlatten` (or `flatten` alias) method will collapse the elements of an array to create a single array.
Example:
```sql
SELECT arrayFlatten([[1, 2, 3], [4, 5]])
```
```text
┌─arrayFlatten([[1, 2, 3], [4, 5]])─┐
│ [1,2,3,4,5] │
└───────────────────────────────────┘
```
## arrayReverse(arr) {#array_functions-arrayreverse}
Returns an array of the same size as the original array containing the elements in reverse order.

4
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@ -61,10 +61,10 @@ However, you can delete old data using `ALTER TABLE ... DROP PARTITION`.
### Performance Considerations
`INSERT` sorts the input data by primary key and splits them into partitions by month. If you insert data for mixed months, it can significantly reduce the performance of the `INSERT` query. To avoid this:
`INSERT` sorts the input data by primary key and splits them into partitions by a partition key. If you insert data into several partitions at once, it can significantly reduce the performance of the `INSERT` query. To avoid this:
- Add data in fairly large batches, such as 100,000 rows at a time.
- Group data by month before uploading it to ClickHouse.
- Group data by a partition key before uploading it to ClickHouse.
Performance will not decrease if:

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13
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@ -79,6 +79,7 @@
[clickhouse-cli](https://github.com/hatarist/clickhouse-cli) - это альтернативный клиент командной строки для ClickHouse, написанный на Python 3.
Основные возможности:
- Автодополнение;
- Подсветка синтаксиса для запросов и вывода данных;
- Поддержка постраничного просмотра для результирующих данных;
@ -90,6 +91,18 @@
## Коммерческие
### Holistics Software
[Holistics](https://www.holistics.io/) вошёл в топ-2 наиболее удобных инструментов для бизнес-аналитики по рейтингу Gartner's Frontrunners в 2019 году. Holistics — full-stack платформа для обработки данных и инструмент бизнес-аналитики, позволяющий вам построить свои процессы с помощью SQL.
Основные возможности:
- Автоматизированные отчёты на почту, Slack, и Google Sheet.
- Мощный редактор SQL c визуализацией, контролем версий, автодополнением, повторным использованием частей запроса и динамическими фильтрами.
- Встроенные инструменты анализа отчётов и всплывающие (iframe) дашборды.
- Подготовка данных и возможности ETL.
- Моделирование данных с помощью SQL для их реляционного отображения.
### DataGrip
[DataGrip](https://www.jetbrains.com/datagrip/) — это IDE для баз данных о JetBrains с выделенной поддержкой ClickHouse. Он также встроен в другие инструменты на основе IntelliJ: PyCharm, IntelliJ IDEA, GoLand, PhpStorm и другие.

21
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@ -188,7 +188,8 @@ ALTER TABLE [db].name DROP CONSTRAINT constraint_name;
- [DETACH PARTITION](#alter_detach-partition) – перенести партицию в директорию `detached`;
- [DROP PARTITION](#alter_drop-partition) – удалить партицию;
- [ATTACH PARTITION|PART](#alter_attach-partition) – добавить партицию/кусок в таблицу из директории `detached`;
- [REPLACE PARTITION](#alter_replace-partition) – скопировать партицию из другой таблицы;
- [ATTACH PARTITION FROM](#alter_attach-partition-from) – скопировать партицию из другой таблицы;
- [REPLACE PARTITION](#alter_replace-partition) – скопировать партицию из другой таблицы с заменой;
- [CLEAR COLUMN IN PARTITION](#alter_clear-column-partition) – удалить все значения в столбце для заданной партиции;
- [CLEAR INDEX IN PARTITION](#alter_clear-index-partition) - очистить построенные вторичные индексы для заданной партиции;
- [FREEZE PARTITION](#alter_freeze-partition) – создать резервную копию партиции;
@ -255,13 +256,29 @@ ALTER TABLE visits ATTACH PART 201901_2_2_0;
Это означает, что вы можете разместить данные в директории `detached` на одной реплике и с помощью запроса `ALTER ... ATTACH` добавить их в таблицу на всех репликах.
#### ATTACH PARTITION FROM {#alter_attach-partition-from}
```sql
ALTER TABLE table2 ATTACH PARTITION partition_expr FROM table1
```
Копирует партицию из таблицы `table1` в таблицу `table2` и добавляет к существующим данным `table2`. Данные из `table1` не удаляются.
Следует иметь в виду:
- Таблицы должны иметь одинаковую структуру.
- Для таблиц должен быть задан одинаковый ключ партиционирования.
Подробнее о том, как корректно задать имя партиции, см. в разделе [Как задавать имя партиции в запросах ALTER](#alter-how-to-specify-part-expr).
#### REPLACE PARTITION {#alter_replace-partition}
```sql
ALTER TABLE table2 REPLACE PARTITION partition_expr FROM table1
```
Копирует партицию из таблицы `table1` в таблицу `table2`. Данные из `table1` не удаляются.
Копирует партицию из таблицы `table1` в таблицу `table2` с заменой существующих данных в `table2`. Данные из `table1` не удаляются.
Следует иметь в виду:

16
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@ -778,6 +778,22 @@ SELECT arrayReduce('uniqUpTo(3)', [1, 2, 3, 4, 5, 6, 7, 8, 9, 10])
└─────────────────────────────────────────────────────────────┘
```
## arrayFlatten(arr) {#array_functions-arrayflatten}
Функция `arrayFlatten` (или `flatten`) соеденит вложенные массивы и вернет массив из их элементов.
Пример:
```sql
SELECT arrayFlatten([[1, 2, 3], [4, 5]])
```
```text
┌─arrayFlatten([[1, 2, 3], [4, 5]])─┐
│ [1,2,3,4,5] │
└───────────────────────────────────┘
```
## arrayReverse(arr) {#array_functions-arrayreverse}
Возвращает массив того же размера, что и исходный массив, содержащий элементы в обратном порядке.

4
docs/ru/query_language/insert_into.md
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@ -62,10 +62,10 @@ INSERT INTO [db.]table [(c1, c2, c3)] SELECT ...
### Замечания о производительности
`INSERT` сортирует входящие данные по первичному ключу и разбивает их на партиции по месяцам. Если вы вставляете данные за разные месяцы вперемешку, то это может значительно снизить производительность запроса `INSERT`. Чтобы избежать этого:
`INSERT` сортирует входящие данные по первичному ключу и разбивает их на партиции по ключу партиционирования. Если вы вставляете данные в несколько партиций одновременно, то это может значительно снизить производительность запроса `INSERT`. Чтобы избежать этого:
- Добавляйте данные достаточно большими пачками. Например, по 100 000 строк.
- Группируйте данные по месяцам самостоятельно перед загрузкой в ClickHouse.
- Группируйте данные по ключу партиционирования самостоятельно перед загрузкой в ClickHouse.
Снижения производительности не будет, если:

1
docs/toc_ru.yml
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@ -223,6 +223,7 @@ nav:
- 'Changelog': 'changelog.md'
- 'Security changelog': 'security_changelog.md'
- 'Roadmap': 'roadmap.md'
- 'Подробный roadmap 2020': 'extended_roadmap.md'
- 'F.A.Q.':
- 'Общие вопросы': 'faq/general.md'

13
docs/zh/interfaces/third-party/gui.md vendored
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@ -63,6 +63,7 @@ ClickHouse Web 界面 [Tabix](https://github.com/tabixio/tabix).
[clickhouse-cli](https://github.com/hatarist/clickhouse-cli) 是ClickHouse的替代命令行客户端，用Python 3编写。
特征：
- 自动完成。
- 查询和数据输出的语法高亮显示。
- 寻呼机支持数据输出。
@ -74,6 +75,18 @@ ClickHouse Web 界面 [Tabix](https://github.com/tabixio/tabix).
## 商业
### Holistics Software
[Holistics](https://www.holistics.io/) 在2019年被Gartner FrontRunners列为可用性最高排名第二的商业智能工具之一。 Holistics是一个基于SQL的全栈数据平台和商业智能工具，用于设置您的分析流程。
特征：
-自动化的电子邮件，Slack和Google表格报告时间表。
-强大的SQL编辑器，具有版本控制，自动完成，可重用的查询组件和动态过滤器。
-通过iframe在自己的网站或页面中嵌入仪表板。
-数据准备和ETL功能。
-SQL数据建模支持数据的关系映射。
### DataGrip
[DataGrip](https://www.jetbrains.com/datagrip/) 是JetBrains的数据库IDE，专门支持ClickHouse。 它还嵌入到其他基于IntelliJ的工具中：PyCharm，IntelliJ IDEA，GoLand，PhpStorm等。

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@ -1,4 +1,4 @@
# ClickHouse可以考虑缺点的功能
# ClickHouse可以认为是缺点的功能
1. 没有完整的事务支持。
2. 缺少高频率，低延迟的修改或删除已存在数据的能力。仅能用于批量删除或修改数据，但这符合 [GDPR](https://gdpr-info.eu)。

2
libs/libcommon/include/common/iostream_debug_helpers.h
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@ -140,7 +140,7 @@ Out & dump(Out & out, const char * name, T && x)
#pragma clang diagnostic ignored "-Wgnu-zero-variadic-macro-arguments"
#endif
#define DUMPVAR(VAR) dump(std::cerr, #VAR, (VAR)); std::cerr << "; ";
#define DUMPVAR(VAR) ::dump(std::cerr, #VAR, (VAR)); std::cerr << "; ";
#define DUMPHEAD std::cerr << __FILE__ << ':' << __LINE__ << " [ " << getThreadNumber() << " ] ";
#define DUMPTAIL std::cerr << '\n';

1
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@ -6,7 +6,6 @@
#include <Poco/Logger.h>
#include <Poco/Message.h>
#include <Poco/Version.h>
#include <Core/SettingsCommon.h>
#include <Common/CurrentThread.h>
#ifndef QUERY_PREVIEW_LENGTH