mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-14 10:22:10 +00:00
97f2a2213e
* Move some code outside dbms/src folder * Fix paths
284 lines
9.0 KiB
C++
284 lines
9.0 KiB
C++
#include "Internals.h"
|
|
#include <Storages/MergeTree/MergeTreeData.h>
|
|
|
|
namespace DB
|
|
{
|
|
namespace ErrorCodes
|
|
{
|
|
extern const int BAD_ARGUMENTS;
|
|
}
|
|
|
|
using ConfigurationPtr = Poco::AutoPtr<Poco::Util::AbstractConfiguration>;
|
|
|
|
ConfigurationPtr getConfigurationFromXMLString(const std::string & xml_data)
|
|
{
|
|
std::stringstream ss(xml_data);
|
|
Poco::XML::InputSource input_source{ss};
|
|
return {new Poco::Util::XMLConfiguration{&input_source}};
|
|
}
|
|
|
|
String getQuotedTable(const String & database, const String & table)
|
|
{
|
|
if (database.empty())
|
|
return backQuoteIfNeed(table);
|
|
|
|
return backQuoteIfNeed(database) + "." + backQuoteIfNeed(table);
|
|
}
|
|
|
|
String getQuotedTable(const DatabaseAndTableName & db_and_table)
|
|
{
|
|
return getQuotedTable(db_and_table.first, db_and_table.second);
|
|
}
|
|
|
|
|
|
// Creates AST representing 'ENGINE = Distributed(cluster, db, table, [sharding_key])
|
|
std::shared_ptr<ASTStorage> createASTStorageDistributed(
|
|
const String & cluster_name, const String & database, const String & table,
|
|
const ASTPtr & sharding_key_ast)
|
|
{
|
|
auto args = std::make_shared<ASTExpressionList>();
|
|
args->children.emplace_back(std::make_shared<ASTLiteral>(cluster_name));
|
|
args->children.emplace_back(std::make_shared<ASTIdentifier>(database));
|
|
args->children.emplace_back(std::make_shared<ASTIdentifier>(table));
|
|
if (sharding_key_ast)
|
|
args->children.emplace_back(sharding_key_ast);
|
|
|
|
auto engine = std::make_shared<ASTFunction>();
|
|
engine->name = "Distributed";
|
|
engine->arguments = args;
|
|
|
|
auto storage = std::make_shared<ASTStorage>();
|
|
storage->set(storage->engine, engine);
|
|
|
|
return storage;
|
|
}
|
|
|
|
|
|
BlockInputStreamPtr squashStreamIntoOneBlock(const BlockInputStreamPtr & stream)
|
|
{
|
|
return std::make_shared<SquashingBlockInputStream>(
|
|
stream,
|
|
std::numeric_limits<size_t>::max(),
|
|
std::numeric_limits<size_t>::max());
|
|
}
|
|
|
|
Block getBlockWithAllStreamData(const BlockInputStreamPtr & stream)
|
|
{
|
|
return squashStreamIntoOneBlock(stream)->read();
|
|
}
|
|
|
|
|
|
bool isExtendedDefinitionStorage(const ASTPtr & storage_ast)
|
|
{
|
|
const auto & storage = storage_ast->as<ASTStorage &>();
|
|
return storage.partition_by || storage.order_by || storage.sample_by;
|
|
}
|
|
|
|
ASTPtr extractPartitionKey(const ASTPtr & storage_ast)
|
|
{
|
|
String storage_str = queryToString(storage_ast);
|
|
|
|
const auto & storage = storage_ast->as<ASTStorage &>();
|
|
const auto & engine = storage.engine->as<ASTFunction &>();
|
|
|
|
if (!endsWith(engine.name, "MergeTree"))
|
|
{
|
|
throw Exception(
|
|
"Unsupported engine was specified in " + storage_str + ", only *MergeTree engines are supported",
|
|
ErrorCodes::BAD_ARGUMENTS);
|
|
}
|
|
|
|
if (isExtendedDefinitionStorage(storage_ast))
|
|
{
|
|
if (storage.partition_by)
|
|
return storage.partition_by->clone();
|
|
|
|
static const char * all = "all";
|
|
return std::make_shared<ASTLiteral>(Field(all, strlen(all)));
|
|
}
|
|
else
|
|
{
|
|
bool is_replicated = startsWith(engine.name, "Replicated");
|
|
size_t min_args = is_replicated ? 3 : 1;
|
|
|
|
if (!engine.arguments)
|
|
throw Exception("Expected arguments in " + storage_str, ErrorCodes::BAD_ARGUMENTS);
|
|
|
|
ASTPtr arguments_ast = engine.arguments->clone();
|
|
ASTs & arguments = arguments_ast->children;
|
|
|
|
if (arguments.size() < min_args)
|
|
throw Exception("Expected at least " + toString(min_args) + " arguments in " + storage_str,
|
|
ErrorCodes::BAD_ARGUMENTS);
|
|
|
|
ASTPtr & month_arg = is_replicated ? arguments[2] : arguments[1];
|
|
return makeASTFunction("toYYYYMM", month_arg->clone());
|
|
}
|
|
}
|
|
|
|
ASTPtr extractPrimaryKey(const ASTPtr & storage_ast)
|
|
{
|
|
String storage_str = queryToString(storage_ast);
|
|
|
|
const auto & storage = storage_ast->as<ASTStorage &>();
|
|
const auto & engine = storage.engine->as<ASTFunction &>();
|
|
|
|
if (!endsWith(engine.name, "MergeTree"))
|
|
{
|
|
throw Exception("Unsupported engine was specified in " + storage_str + ", only *MergeTree engines are supported",
|
|
ErrorCodes::BAD_ARGUMENTS);
|
|
}
|
|
|
|
if (!isExtendedDefinitionStorage(storage_ast))
|
|
{
|
|
throw Exception("Is not extended deginition storage " + storage_str + " Will be fixed later.",
|
|
ErrorCodes::BAD_ARGUMENTS);
|
|
}
|
|
|
|
if (storage.primary_key)
|
|
return storage.primary_key->clone();
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
|
|
ASTPtr extractOrderBy(const ASTPtr & storage_ast)
|
|
{
|
|
String storage_str = queryToString(storage_ast);
|
|
|
|
const auto & storage = storage_ast->as<ASTStorage &>();
|
|
const auto & engine = storage.engine->as<ASTFunction &>();
|
|
|
|
if (!endsWith(engine.name, "MergeTree"))
|
|
{
|
|
throw Exception("Unsupported engine was specified in " + storage_str + ", only *MergeTree engines are supported",
|
|
ErrorCodes::BAD_ARGUMENTS);
|
|
}
|
|
|
|
if (!isExtendedDefinitionStorage(storage_ast))
|
|
{
|
|
throw Exception("Is not extended deginition storage " + storage_str + " Will be fixed later.",
|
|
ErrorCodes::BAD_ARGUMENTS);
|
|
}
|
|
|
|
if (storage.order_by)
|
|
return storage.order_by->clone();
|
|
|
|
throw Exception("ORDER BY cannot be empty", ErrorCodes::BAD_ARGUMENTS);
|
|
}
|
|
|
|
|
|
String createCommaSeparatedStringFrom(const Names & names)
|
|
{
|
|
std::ostringstream ss;
|
|
if (!names.empty())
|
|
{
|
|
std::copy(names.begin(), std::prev(names.end()), std::ostream_iterator<std::string>(ss, ", "));
|
|
ss << names.back();
|
|
}
|
|
return ss.str();
|
|
}
|
|
|
|
Names extractPrimaryKeyColumnNames(const ASTPtr & storage_ast)
|
|
{
|
|
const auto sorting_key_ast = extractOrderBy(storage_ast);
|
|
const auto primary_key_ast = extractPrimaryKey(storage_ast);
|
|
|
|
const auto sorting_key_expr_list = MergeTreeData::extractKeyExpressionList(sorting_key_ast);
|
|
const auto primary_key_expr_list = primary_key_ast
|
|
? MergeTreeData::extractKeyExpressionList(primary_key_ast) : sorting_key_expr_list->clone();
|
|
|
|
/// Maybe we have to handle VersionedCollapsing engine separately. But in our case in looks pointless.
|
|
|
|
size_t primary_key_size = primary_key_expr_list->children.size();
|
|
size_t sorting_key_size = sorting_key_expr_list->children.size();
|
|
|
|
if (primary_key_size > sorting_key_size)
|
|
throw Exception("Primary key must be a prefix of the sorting key, but its length: "
|
|
+ toString(primary_key_size) + " is greater than the sorting key length: " + toString(sorting_key_size),
|
|
ErrorCodes::BAD_ARGUMENTS);
|
|
|
|
Names primary_key_columns;
|
|
Names sorting_key_columns;
|
|
NameSet primary_key_columns_set;
|
|
|
|
for (size_t i = 0; i < sorting_key_size; ++i)
|
|
{
|
|
String sorting_key_column = sorting_key_expr_list->children[i]->getColumnName();
|
|
sorting_key_columns.push_back(sorting_key_column);
|
|
|
|
if (i < primary_key_size)
|
|
{
|
|
String pk_column = primary_key_expr_list->children[i]->getColumnName();
|
|
if (pk_column != sorting_key_column)
|
|
throw Exception("Primary key must be a prefix of the sorting key, but in position "
|
|
+ toString(i) + " its column is " + pk_column + ", not " + sorting_key_column,
|
|
ErrorCodes::BAD_ARGUMENTS);
|
|
|
|
if (!primary_key_columns_set.emplace(pk_column).second)
|
|
throw Exception("Primary key contains duplicate columns", ErrorCodes::BAD_ARGUMENTS);
|
|
|
|
primary_key_columns.push_back(pk_column);
|
|
}
|
|
}
|
|
|
|
return primary_key_columns;
|
|
}
|
|
|
|
String extractReplicatedTableZookeeperPath(const ASTPtr & storage_ast)
|
|
{
|
|
String storage_str = queryToString(storage_ast);
|
|
|
|
const auto & storage = storage_ast->as<ASTStorage &>();
|
|
const auto & engine = storage.engine->as<ASTFunction &>();
|
|
|
|
if (!endsWith(engine.name, "MergeTree"))
|
|
{
|
|
throw Exception(
|
|
"Unsupported engine was specified in " + storage_str + ", only *MergeTree engines are supported",
|
|
ErrorCodes::BAD_ARGUMENTS);
|
|
}
|
|
|
|
if (!startsWith(engine.name, "Replicated"))
|
|
{
|
|
return "";
|
|
}
|
|
|
|
auto replicated_table_arguments = engine.arguments->children;
|
|
|
|
auto zk_table_path_ast = replicated_table_arguments[0]->as<ASTLiteral &>();
|
|
auto zk_table_path_string = zk_table_path_ast.value.safeGet<String>();
|
|
|
|
return zk_table_path_string;
|
|
}
|
|
|
|
ShardPriority getReplicasPriority(const Cluster::Addresses & replicas, const std::string & local_hostname, UInt8 random)
|
|
{
|
|
ShardPriority res;
|
|
|
|
if (replicas.empty())
|
|
return res;
|
|
|
|
res.is_remote = 1;
|
|
for (auto & replica : replicas)
|
|
{
|
|
if (isLocalAddress(DNSResolver::instance().resolveHost(replica.host_name)))
|
|
{
|
|
res.is_remote = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
res.hostname_difference = std::numeric_limits<size_t>::max();
|
|
for (auto & replica : replicas)
|
|
{
|
|
size_t difference = getHostNameDifference(local_hostname, replica.host_name);
|
|
res.hostname_difference = std::min(difference, res.hostname_difference);
|
|
}
|
|
|
|
res.random = random;
|
|
return res;
|
|
}
|
|
|
|
}
|