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2022 Changelog
ClickHouse release v21.3.9.83-lts FIXME as compared to v21.3.8.76-lts
Improvement
- Backported in #23680: 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 #23579: 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 #23677: Don't relax NOT conditions during partition pruning. This fixes #23305 and #21539. #23310 (Amos Bird).
- Backported in #23582: * Fix bug in dict join with join_algorithm = 'auto'. Close #23002. #23312 (Vladimir C).
- Backported in #23585: 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 #23592: Fixed
Cannot unlink file
error on unsuccessful creation of ReplicatedMergeTree table with multidisk configuration. This closes #21755. #23433 (Alexander Tokmakov). - Backported in #23590: 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 #23612: Fix restart / stop command hanging. Closes #20214. #23552 (filimonov).
- Backported in #23696: Added an exception in case of completely the same values in both samples in aggregate function
mannWhitneyUTest
. This fixes #23646. #23654 (Nikita Mikhaylov).