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2022 Changelog
ClickHouse release v21.9.3.30-stable FIXME as compared to v21.9.2.17-stable
Improvement
- Backported in #28897: Use real tmp file instead of predefined "rows_sources" for vertical merges. This avoids generating garbage directories in tmp disks. #28299 (Amos Bird).
Bug Fix (user-visible misbehaviour in official stable release)
- Backported in #28815: Fix possible crash for
SELECT
with partially created aggregate projection in case of exception. #28700 (Amos Bird). - Backported in #28789: Fix benign race condition in ReplicatedMergeTreeQueue. Shouldn't be visible for user, but can lead to subtle bugs. #28734 (alesapin).
- Backported in #28842: Fix expressions compilation with short circuit evaluation. #28821 (Azat Khuzhin).
- Backported in #28993: Fixed a race condition between
DROP PART
andREPLACE/MOVE PARTITION
that might cause replicas to diverge in rare cases. #28864 (Alexander Tokmakov). - Backported in #28949: Fix reading of subcolumns from compact parts. #28873 (Anton Popov).
- Backported in #28925: Fix bug with LowCardinality in short-curcuit function evaluation. Closes #28884. #28887 (Kruglov Pavel).
- Backported in #28927: Fix higher-order array functions (
SIGSEGV
forarrayCompact
/ILLEGAL_COLUMN
forarrayDifference
/arrayCumSumNonNegative
) with consts. #28904 (Azat Khuzhin). - Backported in #29025: Fix the number of threads used in
GLOBAL IN
subquery (it was executed in single threads since #19414 bugfix). #28997 (Nikolai Kochetov).
NOT FOR CHANGELOG / INSIGNIFICANT
- Add more checks for LC in native protocol. #27827 (Nikolai Kochetov).
- Fix usage of nested columns with non-array columns with the same prefix [2] #28762 (Anton Popov).
- Lower compiled_expression_cache_size to 128MB #28816 (Maksim Kita).
- Column default dictGet identifier fix #28863 (Maksim Kita).