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2022 Changelog
ClickHouse release v21.5.2.25-prestable FIXME as compared to v21.5.1.6601-prestable
Improvement
- Backported in #23342: Disable settings
use_hedged_requests
andasync_socket_for_remote
because there is an evidence that it may cause issues. #23261 (Alexey Milovidov). - Backported in #23678: Fixed
quantile(s)TDigest
. Added special handling of singleton centroids according to tdunning/t-digest 3.2+. Also a bug with over-compression of centroids in implementation of earlier version of the algorithm was fixed. #23314 (Vladimir Chebotarev).
Bug Fix
- Backported in #23343: This PR fixes a crash on shutdown which happened because of currentConnections() could return zero while some connections were still alive. #23154 (Vitaly Baranov).
- Backported in #23405: QueryAliasVisitor to prefer alias for ASTWithAlias if subquery was optimized to constant. Fixes #22924. Fixes #10401. #23191 (Maksim Kita).
- Backported in #23383: Fixed
Not found column
error when selecting fromMaterializeMySQL
with condition on key column. Fixes #22432. #23200 (Alexander Tokmakov). - Backported in #23386: Fixed the behavior when disabling
input_format_with_names_use_header
setting discards all the input with CSVWithNames format. This fixes #22406. #23202 (Nikita Mikhaylov). - Backported in #23340: Add type conversion for optimize_skip_unused_shards_rewrite_in (fixes
use-of-uninitialized-value
withoptimize_skip_unused_shards_rewrite_in
). #23219 (Azat Khuzhin). - Backported in #23341: Fixed simple key dictionary from DDL creation if primary key is not first attribute. Fixes #23236. #23262 (Maksim Kita).
- Backported in #23449: Fixed very rare (distributed) race condition between creation and removal of ReplicatedMergeTree tables. It might cause exceptions like
node doesn't exist
on attempt to create replicated table. Fixes #21419. #23294 (Alexander Tokmakov). - Backported in #23578: Fixed very rare race condition on background cleanup of old blocks. It might cause a block not to be deduplicated if it's too close to the end of deduplication window. #23301 (Alexander Tokmakov).
- Backported in #23427: Fix possible crash in case if
unknown packet
was received form remote query (withasync_socket_for_remote
enabled). Maybe fixes #21167. #23309 (Nikolai Kochetov). - Backported in #23675: Don't relax NOT conditions during partition pruning. This fixes #23305 and #21539. #23310 (Amos Bird).
- Backported in #23581: * Fix bug in dict join with join_algorithm = 'auto'. Close #23002. #23312 (Vladimir C).
- Backported in #23428: Fix possible
Block structure mismatch
error for queries withUNION
which could possibly happen after filter-push-down optimization. Fixes #23029. #23359 (Nikolai Kochetov). - Backported in #23642: Fix incompatible constant expression generation during partition pruning based on virtual columns. This fixes https://github.com/ClickHouse/ClickHouse/pull/21401#discussion_r611888913. #23366 (Amos Bird).
- Backported in #23453:
ORDER BY
withCOLLATE
was not working correctly if the column is in primary key (or is a monotonic function of it) and the settingoptimize_read_in_order
is not turned off. This closes #22379. Workaround for older versions: turn the settingoptimize_read_in_order
off. #23375 (Alexey Milovidov). - Backported in #23510: Remove support for
argMin
andargMax
for singleTuple
argument. The code was not memory-safe. The feature was added by mistake and it is confusing for people. These functions can be reintroduced under different names later. This fixes #22384 and reverts #17359. #23393 (Alexey Milovidov). - Backported in #23584: Allow to move more conditions to
PREWHERE
as it was before version 21.1. Insufficient number of moved condtions could lead to worse performance. #23397 (Anton Popov). - Backported in #23477: Kafka storage may support
arrow
andarrowstream
format messages. #23415 (Chao Ma). - Backported in #23587: Fixed
Cannot unlink file
error on unsuccessful creation of ReplicatedMergeTree table with multidisk configuration. This closes #21755. #23433 (Alexander Tokmakov). - Backported in #23497: - Bug fix for
deltaSum
aggregate function in counter reset case ... #23437 (Russ Frank). - Backported in #23491: Fix bug that does not allow cast from empty array literal, to array with dimensions greater than 1. Closes #14476. #23456 (Maksim Kita).
- Backported in #23589: Fix corner cases in vertical merges with
ReplacingMergeTree
. In rare cases they could lead to fails of merges with exceptions likeIncomplete granules are not allowed while blocks are granules size
. #23459 (Anton Popov). - Backported in #23535: When modify column's default value without datatype, and this column is used as ReplacingMergeTree's parameter like column
b
in the below example, then the server will core dump:CREATE TABLE alter_test (a Int32, b DateTime) ENGINE = ReplacingMergeTree(b) ORDER BY a; ALTER TABLE alter_test MODIFY COLUMN `b` DEFAULT now();
the sever throw error:2021.04.22 09:48:00.685317 [ 2607 ] {} <Trace> BaseDaemon: Received signal 11 2021.04.22 09:48:00.686110 [ 2705 ] {} <Fatal> BaseDaemon: ######################################## 2021.04.22 09:48:00.686336 [ 2705 ] {} <Fatal> BaseDaemon: (version 21.6.1.1, build id: 6459E84DFCF8E778546C5AD2FFE91B3AD71E1B1B) (from thread 2619) (no query) Received signal Segmentation fault (11) 2021.04.22 09:48:00.686572 [ 2705 ] {} <Fatal> BaseDaemon: Address: NULL pointer. Access: read. Address not mapped to object. 2021.04.22 09:48:00.686686 [ 2705 ] {} <Fatal> BaseDaemon: Stack trace: 0x1c2585d7 0x1c254f66 0x1bb7e403 0x1bb58923 0x1bb56a85 0x1c6840ef 0x1c691148 0x2061a05c 0x2061a8e4 0x20775a03 0x207722bd 0x20771048 0x7f6e5c25be25 0x7f6e5bd81bad 2021.04.22 09:48:02.283045 [ 2705 ] {} <Fatal> BaseDaemon: 4. /mnt/disk4/hewenting/ClickHouse/src/src/Storages/MergeTree/MergeTreeData.cpp:1449: DB::(anonymous namespace)::checkVersionColumnTypesConversion(DB::IDataType const*, DB::IDataType const*, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >) @ 0x1c2585d7 in /mnt/disk4/hewenting/ClickHouse/build-dbgsrc-clang-dev-nested/programs/clickhouse-server 2021.04.22 09:48:03.714451 [ 2705 ] {} <Fatal> BaseDaemon: 5. /mnt/disk4/hewenting/ClickHouse/src/src/Storages/MergeTree/MergeTreeData.cpp:1582: DB::MergeTreeData::checkAlterIsPossible(DB::AlterCommands const&, std::__1::shared_ptr<DB::Context>) const @ 0x1c254f66 in /mnt/disk4/hewenting/ClickHouse/build-dbgsrc-clang-dev-nested/programs/clickhouse-server 2021.04.22 09:48:04.692949 [ 2705 ] {} <Fatal> BaseDaemon: 6. /mnt/disk4/hewenting/ClickHouse/src/src/Interpreters/InterpreterAlterQuery.cpp:144: DB::InterpreterAlterQuery::execute() @ 0x1bb7e403 in /mnt/disk4/hewenting/ClickHouse/build-dbgsrc-clang-dev-nested/programs/clickhouse-server
. #23483 (hexiaoting). - Backported in #23532: Fix
columns
function when multiple joins in select query. Closes #22736. #23501 (Maksim Kita). - Backported in #23613: Fix restart / stop command hanging. Closes #20214. #23552 (filimonov).
- Backported in #23627: Fix misinterpretation of some
LIKE
expressions with escape sequences. #23610 (Alexey Milovidov). - Backported in #23692: Fixed server fault when inserting data through HTTP caused an exception. This fixes #23512. #23643 (Nikita Mikhaylov).
- Backported in #23694: Added an exception in case of completely the same values in both samples in aggregate function
mannWhitneyUTest
. This fixes #23646. #23654 (Nikita Mikhaylov). - Backported in #23757: Avoid possible "Cannot schedule a task" error (in case some exception had been occurred) on INSERT into Distributed. #23744 (Azat Khuzhin).
NO CL CATEGORY
- Backported in #23347:. #23334 (Alexey Milovidov).
NOT FOR CHANGELOG / INSIGNIFICANT
- Fix logical error in stress tests #23197 (Nikita Mikhaylov).
- Zlib use attribute constructor for functable initialization #23266 (Maksim Kita).
- Fix integration tests for Hedged requests #23275 (Alexey Milovidov).
- System dictionaries virtual key column #23458 (Maksim Kita).