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ClickHouse release v21.1.1.5646-prestable FIXME as compared to v20.12.1.5236-prestable
Backward Incompatible Change
- Prohibit toUnixTimestamp(Date()) (before it just returns UInt16 representation of Date). #17376 (Azat Khuzhin).
- Removed aggregate functions
timeSeriesGroupSum
,timeSeriesGroupRateSum
because a friend of mine said they never worked. This fixes #16869. If you have luck using these functions, write a email to clickhouse-feedback@yandex-team.com. #17423 (Alexey Milovidov). - The setting
input_format_null_as_default
is enabled by default. #17525 (Alexey Milovidov). - Set
insert_quorum_parallel
to 1 by default. It is significantly more convenient to use than "sequential" quorum inserts. But if you rely to sequential consistency, you should set the setting back to zero. #17567 (Alexey Milovidov). - Restrict
ALTER MODIFY SETTING
from changing storage settings that affects data parts (write_final_mark
andenable_mixed_granularity_parts
). #18306 (Amos Bird). - Check settings constraints for profile settings from config. Server will fail to start if users.xml contain settings that do not meet corresponding constraints. #18486 (Alexander Tokmakov).
- Remove
sumburConsistentHash
function. This closes #18120. #18656 (Alexey Milovidov). - Add
DIV
andMOD
operators.DIV
implements integer division. This is needed for MySQL compatibility and forsqllogictest
. This closes #18707. It may introduce incompatibilities if you are using DIV or MOD as column names or aliases. In case of incompatibility, write aliases after AS keyword or wrap identifiers in quotes (either double quotes or backquotes). #18760 (Du Chuan).
New Feature
- Use https://github.com/lemire/fast_float to parse floating point numbers. #16787 (Maksim Kita).
- ... #16819 (pronvis).
- Provide a new aggregator combinator :
-SimpleState
to build SimpleAggregateFunction types via query. It's useful for defining MaterializedView of AggregatingMergeTree engine, and will benefit projections too. #16853 (Amos Bird). - Added
mannWitneyUTest
,studentTTest
andwelchTTest
aggregate functions. Refactored RankCorr a bit. #16883 (Nikita Mikhaylov). - Add a setting optimize_on_insert. When enabled, do the same transformation for INSERTed block of data as if merge was done on this block (e.g. Replacing, Collapsing, Aggregating...). This setting will be enabled as default. This can influence Materialized View and MaterializeMySQL behaviour (see detailed description). This closes #10683. #16954 (Kruglov Pavel).
- add
*.zst
compression/decompression support.It enables using*.zst
infile()
function andContent-encoding: zstd
in http client.This closes #16791 . #17144 (Abi Palagashvili). -
- IP Dictionary supports
IPv4
/IPv6
types directly. #17571 (Vladimir C).
- IP Dictionary supports
- related: #16176 Usage:
set limit = 10; set offset = 20;
this two settings will affect SELECT query as if it is added likeselect * from ($your_original_select_query) tmp limit xxx offset xxx;
. #17633 (hexiaoting). - Add asynchronous metrics on total amount of rows, bytes and parts in MergeTree tables. This fix #11714. #17639 (flynn).
- Introduce
DETACH TABLE/VIEW ... PERMANENTLY
syntax, so that after restarting the table does not reappear back automatically (only by explicit request). The table can still be attached back using the short syntax ATTACH TABLE. Implements #5555. Fixes #13850. #17642 (filimonov). - Adds a new table called
system.distributed_ddl_queue
that displays the queries in the DDL worker queue. #17656 (Bharat Nallan). - Add function
encodeXMLComponent
to escape characters to place string into XML text node or attribute. #17659 (nauta). - Now clickhouse-client supports opening EDITOR to edit commands.
Alt-Shift-E
. #17665 (Amos Bird). - Add support for PROXYv1 protocol to wrap native TCP interface. Allow quotas to be keyed by proxy-forwarded IP address (applied for PROXYv1 address and for X-Forwarded-For from HTTP interface). This is useful when you provide access to ClickHouse only via trusted proxy (e.g. CloudFlare) but want to account user resources by their original IP addresses. This fixes #17268. #17707 (Alexey Milovidov).
- Add ability to use custom TLD list in functions
firstSignificantSubdomainCustom
,cutToFirstSignificantSubdomainCustom
. #17748 (Azat Khuzhin). - Clickhouse-benchmark added query parameter. #17832 (Maksim Kita).
- Extended
OPTIMIZE ... DEDUPLICATE
syntax to allow explicit (or implicit with asterisk/column transformers) list of columns to check for duplicates on. ... #17846 (Vasily Nemkov). - Add settings
min_compress_block_size
andmax_compress_block_size
to MergeTreeSettings, which have higher priority than the global settings and take effect when they are set. close 13890. #17867 (flynn). - Implemented
ATTACH TABLE name FROM 'path/to/data/' (col1 Type1, ...
query. It creates new table with provided structure and attaches table data from provided directory inuser_files
. #17903 (Alexander Tokmakov). - Added
arrayMin
,arrayMax
,arrayAvg
aggregation functions. #18032 (Maksim Kita). - Support
SHOW SETTINGS
statement to show parameters in system.settings.SHOW CHANGED SETTINGS
andLIKE/ILIKE
clause are also supported. #18056 (Jianmei Zhang). - Allow create table as select with columns specification. Example
CREATE TABLE t1 (x String) ENGINE = Memory AS SELECT 1;
. #18060 (Maksim Kita). -
- IP Dictionary supports key fetching. Resolves #18241. #18480 (Vladimir C).
- Implemented
REPLACE TABLE
andCREATE OR REPLACE TABLE
queries. #18521 (Alexander Tokmakov). - Added function
byteSize
to estimate of uncompressed byte size of its arguments in memory. E.g. for UInt32 argument it will return constant 4, for String argument - the string length + 9. The function can take multiple arguments. The typical application is byteSize(*). #18579 (Ping Yu). - Add
query_id
column tosystem.part_log
for inserted parts. closes #10097. #18644 (flynn). - Now we have a new storage setting
max_partitions_to_read
for tables in the MergeTree family. It limits the max number of partitions that can be accessed in one query. A user settingforce_max_partition_limit
is also added to enforce this constraint. #18712 (Amos Bird). - Function
position
now supportsposition(needle in haystack)
synax for SQL compatibility. This closes #18701. ... #18779 (Jianmei Zhang).
Performance Improvement
- Slightly improved performance of float parsing. #16809 (Maksim Kita).
- Improved performance of function
repeat
. #16937 (satanson). - Fix performance of reading from
Merge
tables over huge number ofMergeTree
tables. Fixes #7748. #16988 (Anton Popov). - Now the
-If
combinator is devirtualized, andcount
is properly vectorized. This is for https://github.com/ClickHouse/ClickHouse/pull/17041. #17043 (Amos Bird). - Improve performance of AggregatingMergeTree w/ SimpleAggregateFunction(String) in PK. #17109 (Azat Khuzhin).
- Add
remerge_sort_lowered_memory_bytes_ratio
setting (If memory usage after remerge does not reduced by this ratio, remerge will be disabled). #17539 (Azat Khuzhin). - Speedup
IPv6CIDRToRange
implementation. #17569 (Vladimir C). - Using dragonbox algorithm for float to string conversion instead of ryu. #17831 (Maksim Kita).
- Optimized read for StorageMemory. #18052 (Maksim Kita).
- Don't send empty blocks to shards on synchronous INSERT into Distributed table. This closes #14571. #18775 (Alexey Milovidov).
- Replace
PODArray
withPODArrayWithStackMemory
inAggregateFunctionWindowFunnelData
to improvementwindowFunnel
function performance. #18817 (flynn). - Add
--no-system-table
option forclickhouse-local
to run without system tables. This avoids initialization ofDateLUT
that may take noticeable amount of time (tens of milliseconds) at startup. #18899 (Alexey Milovidov).
Improvement
-
- New IP Dictionary implementation with lower memory consumption, improved performance for some cases, and fixed bugs. #16804 (Vladimir C).
- Added proper authentication using environment,
~/.aws
andAssumeRole
for S3 client. #16856 (Vladimir Chebotarev). - Support HTTP proxy and HTTPS S3 endpoint configuration. #16861 (Pavel Kovalenko).
- When
-OrNull
combinator combined-If
,-Merge
,-MergeState
,-State
combinators, we should put-OrNull
in front. #16935 (flynn). - Now set indices will work with
GLOBAL IN
. This fixes #17232 , #5576 . #17253 (Amos Bird). - Avoid possible stack overflow in bigint conversion. Big integers are experimental. #17269 (flynn).
- Improved minimal Web UI: add history; add sharing support; avoid race condition of different requests; add request in-flight and ready indicators; add favicon; detect Ctrl+Enter if textarea is not in focus. #17293 (Alexey Milovidov).
- Allow to use
optimize_move_to_prewhere
optimization with compact parts, when sizes of columns are unknown. #17330 (Anton Popov). - Implement
countSubstrings()
/countSubstringsCaseInsensitive()
/countSubstringsCaseInsensitiveUTF8()
(Count the number of substring occurrences). #17347 (Azat Khuzhin). - Add eof check in receiveHello to prevent getting
Attempt to read after eof
exception. #17365 (Kruglov Pavel). - Replaced
malloc
withnew
, so that theMemoryTracker
takes this memory into account. #17412 (Nikita Mikhaylov). - Fix parsing of SETTINGS clause of the INSERT ... SELECT ... SETTINGS query. #17414 (Azat Khuzhin).
- Multiple improvements in
./clickhouse install
script. #17421 (Alexey Milovidov). - Simplify Sys/V init script. It was not working on Ubuntu 12.04. #17428 (Alexey Milovidov).
- Now queries coming to the server via MySQL and PostgreSQL protocols have distinctive interface types (which can be seen in the
interface
column of the tablesystem.query_log
):4
for MySQL, and5
for PostgreSQL, instead of formerly used1
which is now used for the native protocol only. #17437 (Vitaly Baranov). - Allow specifying TTL to remove old entries from system log tables, using the
<ttl>
attribute inconfig.xml
. #17438 (Du Chuan). - Add functions countMatches/countMatchesCaseInsensitive. #17459 (Azat Khuzhin).
- Return dynamic columns like MATERIALIZED / ALIAS for wildcard query when switches
asterisk_include_materialized_columns
andasterisk_include_alias_columns
are turned on. #17462 (Ken Chen). - Export asynchronous metrics of all servers current threads. It's useful to track down issues like https://github.com/ClickHouse-Extras/poco/pull/28. #17463 (Amos Bird).
- Export current max ddl entry executed by DDLWorker. It's useful to check if DDLWorker hangs somewhere. #17464 (Amos Bird).
- Query obfuscator: avoid usage of some SQL keywords for identifier names. #17526 (Alexey Milovidov).
- Allow query parameters in UPDATE statement of ALTER query. Fixes #10976. #17563 (Alexey Milovidov).
- Don't throw "Too many parts" error in the middle of INSERT query. #17566 (Alexey Milovidov).
- Allow to reload symbols from debug file. This PR also fixes a build-id issue. #17637 (Amos Bird).
- This fixes #17457. #17641 (Nikita Mikhaylov).
- Switch to patched version of RocksDB (from ClickHouse-Extras). #17643 (Nikita Mikhaylov).
- Do not ignore server memory limits during Buffer flush. #17646 (Azat Khuzhin).
- Removed exception throwing at table initialization if there was no connection (it will be reconnecting in the background). #17709 (Kseniia Sumarokova).
- system.query_log now has extensive information to achieve better query analysis. #17726 (Amos Bird).
- Check system log tables' engine definition grammatically to prevent some configuration errors. Notes that this grammar check is not semantical, that means such mistakes as non-existent columns / expression functions would be not found out util the table is created. #17739 (Du Chuan).
- Improves the path concatenation of zookeeper paths inside DDLWorker. #17767 (Bharat Nallan).
- Improvement of Web UI: do not add empty query to browser history. #17770 (Alexey Milovidov).
-
- Let the possibility to override timeout value for running script using the ClickHouse docker image. #17818 (Guillaume Tassery).
- Add metrics(Parts, PartsActive, PartsInactive) for part number in MergeTree in clickhouse. #17838 (徐炘).
- Add diagnostic information when two merge tables try to read each other's data. #17854 (徐炘).
- Hints for column names. #17112. #17857 (fastio).
- Support for async tasks in
PipelineExecutor
. Initial support of async sockets for remote queries. #17868 (Nikolai Kochetov). allow_introspection_functions=0
prohibits usage of introspection functions but doesn't prohibit giving grants for them anymore (the grantee will need to setallow_introspection_functions=1
for himself to be able to use that grant). Similarlyallow_ddl=0
prohibits usage of DDL commands but doesn't prohibit giving grants for them anymore. #17908 (Vitaly Baranov).- Ability to set custom metadata when putting S3 object. #17909 (Pavel Kovalenko).
- Adaptive choose of single/multi part upload in WriteBufferFromS3. Single part upload is controlled by a new setting 'max_single_part_upload_size'. #17934 (Pavel Kovalenko).
- Forcibly removing empty or bad metadata files from filesystem for DiskS3. S3 is an experimental feature. #17935 (Pavel Kovalenko).
- Now the table function
merge()
requires the current user to have theSELECT
privilege on each table it receives data from. This PR fixes #16964. #17983 (Vitaly Baranov). - Decrease log verbosity of the events when the client drops the connection from WARNING to INFORMATION. #18005 (filimonov).
- Fix clickhouse-client rendering issue when the size of terminal window changes. #18009 (Amos Bird).
- Temporary tables are visible in the system tables
system.tables
andsystem.columns
now only in those session where they have been created. The internal database_temporary_and_external_tables
is now hidden in those system tables; temporary tables are shown as tables with empty database with theis_temporary
flag set instead. #18014 (Vitaly Baranov). - Fix dead list watches removal for TestKeeperStorage. #18065 (alesapin).
- Support
SHOW CREATE VIEW name
syntax like MySQL. #18095 (Du Chuan). - Now the table function
merge()
requires the current user to have theSELECT
privilege on each table it receives data from. This PR fixes #16964. #18104 (Vitaly Baranov). - Add
disk
to Set and Join storage settings. #18112 (Pervakov Grigorii). EXPLAIN AST
now support queries other thenSELECT
. #18136 (李扬).- All queries of type
Decimal * Float
or vice versa are allowed, including aggregate ones (e.g.SELECT sum(decimal_field * 1.1)
orSELECT dec_col * float_col
), the result type is Float32 or Float64. #18145 (Mike Kot). - Array aggregation
arrayMin
,arrayMax
,arraySum
,arrayAvg
support forInt128
,Int256
,UInt256
. #18147 (Maksim Kita). - Better hints for
SHOW ...
query syntax. #18183 (Du Chuan). - Now clickhouse-install could work on Mac. The problem was that there is no procfs on this platform. #18201 (Nikita Mikhaylov).
- Make better adaptive granularity calculation for merge tree wide parts. #18223 (alesapin).
- Allow to parse Array fields from CSV if it is represented as a string containing array that was serialized as nested CSV. Example:
"[""Hello"", ""world"", ""42"""" TV""]"
will parse as['Hello', 'world', '42" TV']
. Allow to parse array in CSV in a string without enclosing braces. Example:"'Hello', 'world', '42"" TV'"
will parse as['Hello', 'world', '42" TV']
. #18271 (Alexey Milovidov). - In case of unexpected exceptions automatically restart background thread which is responsible for execution of distributed DDL queries. Fixes #17991. #18285 (徐炘).
- Add a new setting
insert_distributed_one_random_shard = 1
to allow insertion into multi-sharded distributed table without any distributed key. #18294 (Amos Bird). - related to #18133. #18309 (hexiaoting).
- Fix potential server crash during Buffer rollback (that is impossible in current ClickHouse version). #18329 (Azat Khuzhin).
- Support builtin function
isIPv4String
&&isIPv6String
like MySQL. #18349 (Du Chuan). - Add ability to modify primary and partition key column type from
LowCardinality(Type)
toType
and vice versa. Also add an ability to modify primary key column type fromEnumX
toIntX
type. Fixes #5604. #18362 (alesapin). - Fix bug: no newline after exception message in some tools. #18444 (Alexey Milovidov).
- support syntax
EXISTS DATABASE name
. #18458 (Du Chuan). - Fixed assertion error inside allocator in case when last argument of function bar is NaN. Now simple ClickHouse's exception is being thrown. This fixes #17876. #18520 (Nikita Mikhaylov).
- PODArray: Avoid call to memcpy with (nullptr, 0) arguments (Fix UBSan report). This fixes #18525. #18526 (Alexey Milovidov).
- Fix SimpleAggregateFunction in SummingMergeTree. Now it works like AggregateFunction. In previous versions values were summed together regardless to the aggregate function. This fixes #18564 . #8052. #18637 (Amos Bird).
- Another fix of using SimpleAggregateFunction in SummingMergeTree. This fixes #18676 . #18677 (Amos Bird).
- Allow column transformer
EXCEPT
to accept a string as regular expression matcher. This resolves #18685 . #18699 (Amos Bird). - Apply
ALTER TABLE <replicated_table> ON CLUSTER MODIFY SETTING ...
to all replicas. Because we don't replicate such alter commands. #18789 (Amos Bird). - Expand macros in the zk path when executing fetchPartition. #18839 (fastio).
SYSTEM KILL
command started to work in Docker. This closes #18847. #18848 (Alexey Milovidov).- Two new settings (by analogy with MergeTree family) has been added: -
fsync_after_insert
- Do fsync for every inserted. Will decreases performance of inserts. -fsync_directories
- Do fsync for temporary directory (that is used for async INSERT only) after all operations (writes, renames, etc.). #18864 (Azat Khuzhin). - change the sorting key of events_list from timestamp to (timestamp, event_index). #18884 (Fuwang Hu).
- Aliases declared in
WITH
statement are properly used in index analysis. Queries likeWITH column AS alias SELECT ... WHERE alias = ...
may use index now. #18896 (Amos Bird).
Bug Fix
- Fix bug when clickhouse-server doesn't send
close
request to ZooKeeper server. #16837 (alesapin). - TODO. #16866 (Alexander Tokmakov).
- Fix optimization of group by with enabled setting
optimize_aggregators_of_group_by_keys
and joins. Fixes #12604. #16951 (Anton Popov). - Fix incorrect comparison of types
DateTime64
with different scales. Fixes #16655 ... #16952 (Vasily Nemkov). - Fix order by optimization with monotonous functions. Fixes #16107. #16956 (Anton Popov).
- Fix Merge(Distributed()) with JOIN. #16993 (Azat Khuzhin).
-
- Fix optimize_distributed_group_by_sharding_key for query with OFFSET only. #16996 (Azat Khuzhin).
- Bug fix for funciton fuzzBits, related issue: #16980. #17051 (hexiaoting).
- Fix possible wrong index analysis when the types of the index comparison are different. This fixes #17122. #17145 (Amos Bird).
- Fixed possible not-working mutations for parts stored on S3 disk. #17227 (Pavel Kovalenko).
- Fix #15235. When clickhouse-copier handle non-partitioned table, throws segfault error. #17248 (Qi Chen).
- Fix set index invalidation when there are const columns in the subquery. This fixes #17246 . #17249 (Amos Bird).
- Fix possible
Unexpected packet Data received from client
error for Distributed queries withLIMIT
. #17254 (Azat Khuzhin). - Fix indeterministic functions with predicate optimizer. This fixes #17244. #17273 (Winter Zhang).
- fixes #16835 try fix miss match header with MySQL SHOW statement. #17366 (Winter Zhang).
- Fix crash while reading from
JOIN
table withLowCardinality
types. Fixes #17228. #17397 (Nikolai Kochetov). - Fixed high CPU usage in background tasks of *MergeTree tables. #17416 (Alexander Tokmakov).
- Fix duplicates after
DISTINCT
which were possible because of incorrect optimization. Fixes #17294. #17296 (li chengxiang). #17439 (Nikolai Kochetov). - Avoid server abnormal termination in case of too low memory limits (
max_memory_usage=1
/max_untracked_memory=1
). #17453 (Azat Khuzhin). - Fix
ORDER BY
with enabled settingoptimize_redundant_functions_in_order_by
. #17471 (Anton Popov). - Fix bug when mark cache size was underestimated by clickhouse. It may happen when there are a lot of tiny files with marks. #17496 (alesapin).
- Fix alter query hang when the corresponding mutation was killed on the different replica. Fixes #16953. #17499 (alesapin).
- Fix the issue when server can stop accepting connections in very rare cases. #17542 (Alexey Milovidov).
- When clickhouse-client is used in interactive mode with multiline queries, single line comment was erronously extended till the end of query. This fixes #13654. #17565 (Alexey Milovidov).
- Exception
fmt::v7::format_error
can be logged in background for MergeTree tables. This fixes #17613. #17615 (Alexey Milovidov). - Fix empty
system.stack_trace
table when server is running in daemon mode. #17630 (Amos Bird). - In might be determined incorrectly if cluster is circular- (cross-) replicated or not when executing
ON CLUSTER
query due to race condition whenpool_size
> 1. It's fixed. #17640 (Alexander Tokmakov). - Fixed
Function not implemented
error when executingRENAME
query inAtomic
database with ClickHouse running on Windows Subsystem for Linux. Fixes #17661. #17664 (Alexander Tokmakov). - Fixed problem when ClickHouse fails to resume connection to MySQL servers. #17681 (Alexander Kazakov).
- Fixed segfault when there is not enough space when inserting into
Distributed
table. #17737 (Alexander Tokmakov). - Exception message about max table size to drop was displayed incorrectly. #17764 (Alexey Milovidov).
- Do not restore parts from WAL if
in_memory_parts_enable_wal
is disabled. #17802 (detailyang). - fix incorrect initialize
max_compress_block_size
of MergeTreeWriterSettings withmin_compress_block_size
. #17833 (flynn). - Fix possible segfault in
topK
aggregate function. This closes #17404. #17845 (Maksim Kita). - Fix max_distributed_connections (affects
prefer_localhost_replica=1
andmax_threads!=max_distributed_connections
). #17848 (Azat Khuzhin). - Trivial query optimization was producing wrong result if query contains ARRAY JOIN (so query is actually non trivial). #17887 (sundyli).
- Fix comparison of
DateTime64
andDate
. Fixes #13804 and #11222. ... #17895 (Vasily Nemkov). - When server log rotation was configured using
logger.size
parameter with numeric value larger than 2^32, the logs were not rotated properly. This is fixed. #17905 (Alexander Kuzmenkov). - fixes #15187 fixes #17912 support convert MySQL prefix index for MaterializeMySQL CC: @tavplubix. #17944 (Winter Zhang).
- Fix comparison of
DateTime64
andDate
. Fixes #13804 and #11222. ... #18050 (Vasily Nemkov). - Fix corruption in librdkafka snappy decompression (was a problem only for gcc10 builds, but official builds uses clang already, so at least recent official releases are not affected). #18053 (Azat Khuzhin).
- Fixed
std::out_of_range: basic_string
in S3 URL parsing. #18059 (Vladimir Chebotarev). - Fix error when query
MODIFY COLUMN ... REMOVE TTL
doesn't actually remove column TTL. #18130 (alesapin). - Fix
Unknown setting profile
error on attempt to set settings profile. #18167 (Alexander Tokmakov). - Fix inserting a row with default value in case of parsing error in the last column. Fixes #17712. #18182 (Jianmei Zhang).
- fixes #18186 fixes #16372 fix unique key convert crash in MaterializeMySQL database engine. #18211 (Winter Zhang).
- Fix key comparison between Enum and Int types. This fixes #17989. #18214 (Amos Bird).
- Fix possible incomplete query result while reading from
MergeTree*
in case of read backoff (message<Debug> MergeTreeReadPool: Will lower number of threads
in logs). Was introduced in #16423. Fixes #18137. #18216 (Nikolai Kochetov). SELECT JOIN
now requires theSELECT
privilege on each of the joined tables. This PR fixes #17654. #18232 (Vitaly Baranov).-
- Fixed issue when
clickhouse-odbc-bridge
process is unreachable by server on machines with dual IPv4/IPv6 stack; - Fixed issue when ODBC dictionary updates are performed using malformed queries and/or cause crashes; Possibly closes #14489. #18278 (Denis Glazachev).
- Fixed issue when
- Fix possible crashes in aggregate functions with combinator
Distinct
, while using two-level aggregation. Fixes #17682. #18365 (Anton Popov). - Fix filling table
system.settings_profile_elements
. This PR fixes #18231. #18379 (Vitaly Baranov). - Restrict merges from wide to compact parts. In case of vertical merge it led to broken result part. #18381 (Anton Popov).
- Fix possible race condition in concurrent usage of
Set
orJoin
tables and selects fromsystem.tables
. #18385 (Alexey Milovidov). - Fix -SimpleState combinator generates incompatible arugment type and return type. #18404 (Amos Bird).
- Fix the unexpected behaviour of
SHOW TABLES
. #18431 (fastio). - Fixed
value is too short
error when executingtoType(...)
functions (toDate
,toUInt32
, etc) with argument of typeNullable(String)
. Now such functions returnNULL
on parsing errors instead of throwing exception. Fixes #7673. #18445 (Alexander Tokmakov). - Proper support for 12AM in
parseDateTimeBestEffort
function. This fixes #18402. #18449 (vladimir-golovchenko). - Disable write with AIO during merges because it can lead to extremely rare data corruption of primary key columns during merge. #18481 (alesapin).
- Fix bug which may lead to
ALTER
queries hung after corresponding mutation kill. Found by thread fuzzer. #18518 (alesapin). - Fix possible
Pipeline stuck
error while usingORDER BY
after subquery withRIGHT
orFULL
join. #18550 (Nikolai Kochetov). - Add FixedString Data type support. I'll get this exception "Code: 50, e.displayText() = DB::Exception: Unsupported type FixedString(1)" when replicating data from MySQL to ClickHouse. This patch fixes bug #18450 Also fixes #6556. #18553 (awesomeleo).
- Fix previous bug when date overflow with different values. Strict Date value limit to "2106-02-07", cast date > "2106-02-07" to value 0. #18565 (hexiaoting).
- Fix removing of empty parts in
ReplicatedMergeTree
tables, created with old syntax. Fixes #18582. #18614 (Anton Popov). - Fix Logger with unmatched arg size. #18717 (sundyli).
- Fixed
Attempt to read after eof
error when trying toCAST
NULL
fromNullable(String)
toNullable(Decimal(P, S))
. Now functionCAST
returnsNULL
when it cannot parse decimal from nullable string. Fixes #7690. #18718 (Winter Zhang). - Asynchronous distributed INSERTs can be rejected by the server if the setting
network_compression_method
is globally set to non-default value. This fixes #18741. #18776 (Alexey Milovidov). - Fix *If combinator with unary function and Nullable types. #18806 (Azat Khuzhin).
-
- Fix never worked
fsync_part_directory
/fsync_after_insert
/in_memory_parts_insert_sync
. #18845 (Azat Khuzhin).
- Fix never worked
- Fix use after free bug in rocksdb. #18862 (sundyli).
- Queries for external databases (MySQL, ODBC, JDBC) were incorrectly rewritten if there was an expression in form of
x IN table
. This fixes #9756. #18876 (Alexey Milovidov). - Fix possible hang at shutdown in clickhouse-local. This fixes #18891. #18893 (Alexey Milovidov).
- Fix issue with
bitmapOrCardinality
that may lead to nullptr dereference. This closes #18911. #18912 (sundyli).
Build/Testing/Packaging Improvement
- Add some test for MaterializeMySQL. e.g. network partition, MySQL kill sync thread... #16806 (TCeason).
- Now ClickHouse can pretend to be a fake ZooKeeper. Currently, storage implementation is just stored in-memory hash-table, and server partially support ZooKeeper protocol. #16877 (alesapin).
PODArray
does not initialize "new" elements when resizing, unlikestd::vector
. This probably fixes this failure from #17309. #17344 (Nikita Mikhaylov).- There was an uninitialized variable in the code of Copier. #17363 (Nikita Mikhaylov).
- Send info about official build, memory, cpu and free disk space to Sentry if it is enabled. Sentry is opt-in feature to help ClickHouse developers. This closes #17279. #17543 (Alexey Milovidov).
- Add an integration test: MySQL server killed while insert for MaterializeMySQL Engine. #17614 (TCeason).
- Add an integration test: ClickHouse killed while insert for MaterializeMySQL ENGINE. #17622 (TCeason).
-
- RBAC testflows tests for SHOW, TRUNCATE, KILL, and OPTIMIZE. - Updates to old tests. - Resolved comments from #https://github.com/ClickHouse/ClickHouse/pull/16977. #17657 (MyroTk).
- Now we use the fresh docker daemon version in integration tests. #17671 (alesapin).
-
- Testflows tests for RBAC ACCESS MANAGEMENT privileges. #17804 (MyroTk).
- Updating TestFlows README.md to include "How To Debug Why Test Failed" section. #17808 (vzakaznikov).
- Add our own CMakeList for dragonbox which was added in #17831. #17869 (Nikita Mikhaylov).
- Enable Pytest framework for stateless tests. #17902 (Ivan).
- Adjusting timeouts a bit, in the good hope that it will prevent flakiness of the test. #18000 (filimonov).
- Now,
clickhouse-test
DROP/CREATE databases with a timeout. #18098 (alesapin). - Change OpenSSL to BoringSSL. It allows to avoid issues with sanitizers. This fixes #12490. This fixes #17502. This fixes #12952. #18129 (Alexey Milovidov).
- Fix usage of uninitialized value in function toModifiedJulianDayOrNull, reported by MSan. Was discovered here. #18172 (Nikita Mikhaylov).
- Update
anchore/scan-action@main
workflow action (was moved from master). #18192 (Stig Bakken). - Do not use non thread-safe function
strerror
. #18204 (Alexey Milovidov). -
- Updating TestFlows version to the latest 1.6.72 - Re-generating requirements.py. #18208 (vzakaznikov).
- Merging requirements for AES encryption functions. Updating aes_encryption tests to use new requirements. Updating TestFlows version to 1.6.72. #18221 (vzakaznikov).
- Enable Thread Fuzzer for stateless tests flaky check. #18299 (alesapin).
- Check for leftovers of conflict markers in docs. #18332 (Alexey Milovidov).
- Fix codespell warnings. Split style checks into separate parts. Update style checks docker image. #18463 (Ilya Yatsishin).
- Update timezones info to 2020e. #18531 (alesapin).
- Fix shellcheck errors in style check. #18566 (Ilya Yatsishin).
- TestFlows: fixes to LDAP tests that fail due to slow test execution. #18790 (vzakaznikov).
- Generate build id when ClickHouse is linked with
lld
. It's appeared thatlld
does not generate it by default on my machine. Build id is used for crash reports and introspection. #18808 (Alexey Milovidov). - Add simple integrity check for ClickHouse binary. It allows to detect corruption due to faulty hardware (bit rot on storage media or bit flips in RAM). #18811 (Alexey Milovidov).
- Removed the -finline-hint-functions flag not present in GCC. #18846 (Mike Kot).
- Add
SYSTEM SUSPEND
command for fault injection. It can be used to faciliate failover tests. This closes #15979. #18850 (Alexey Milovidov).
NO CL ENTRY
- NO CL ENTRY: 'Bump mkdocs-macros-plugin from 0.4.20 to 0.5.0 in /docs/tools'. #17351 (dependabot-preview[bot]).
- NO CL ENTRY: 'Revert "Attempt to fix Stress test (MSan)"'. #17372 (Nikita Mikhaylov).
- NO CL ENTRY: 'Revert "Bump mkdocs-macros-plugin from 0.4.20 to 0.5.0 in /docs/tools"'. #17405 (Alexey Milovidov).
- NO CL ENTRY: 'Update README.md'. #17596 (Robert Hodges).
- NO CL ENTRY: 'Revert "Fix index granularity calculation on block borders"'. #17918 (alesapin).
- NO CL ENTRY: 'Revert "Date vs DateTime64 comparison"'. #17985 (Alexey Milovidov).
- NO CL ENTRY: 'Исправил опечатку в названии ОС RedHad->RedHat'. #18028 (Ed Rakhmankulov).
- NO CL ENTRY: 'Revert "Fix access rights required for the merge() table function."'. #18103 (Alexey Milovidov).
- NO CL ENTRY: 'Revert "Add some extra tests to copier"'. #18636 (Nikita Mikhaylov).
- NO CL ENTRY: 'Fix typo in array functions' documentation'. #18792 (Bertrand Junqua).
- NO CL ENTRY: 'Revert "Add metrics for part number in MergeTree in ClickHouse"'. #18834 (Alexey Milovidov).
- NO CL ENTRY: 'Fixed typo in metrics.md'. #18920 (Mark Frost).