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ClickHouse/docs/changelogs/v21.1.9.41-stable.md

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1 2022

2022 Changelog

ClickHouse release v21.1.9.41-stable FIXME as compared to v21.1.8.30-stable

Improvement

  • Backported in #22817: Make FQDN and other DNS related functions work correctly in alpine images. #20336 (filimonov).
  • Backported in #22810: If PODArray was instantiated with element size that is neither a fraction or a multiple of 16, buffer overflow was possible. No bugs in current releases exist. #21533 (Alexey Milovidov).

Bug Fix

  • Backported in #22967: Fix very rare bug when quorum insert with quorum_parallel=1 is not really "quorum" because of deduplication. #18215 (filimonov).
  • Backported in #22088: In case if query has constant WHERE condition, and setting optimize_skip_unused_shards enabled, all shards may be skipped and query could return incorrect empty result. #21550 (Amos Bird).
  • Backported in #21857: Fix possible error Cannot find column when optimize_skip_unused_shards is enabled and zero shards are used. #21579 (Azat Khuzhin).
  • Backported in #22758: Fix usage of function map in distributed queries. #22588 (foolchi).
  • Backported in #22890: Fix approx total rows accounting for reverse reading from MergeTree. #22726 (Azat Khuzhin).
  • Backported in #22919: Fixed a crash when using mannWhitneyUTest and rankCorr with window functions. This fixes #22728. #22876 (Nikita Mikhaylov).

Build/Testing/Packaging Improvement

  • Backported in #22813: Allow to start up with modified binary under gdb. In previous version if you set up breakpoint in gdb before start, server will refuse to start up due to failed integrity check. #21258 (Alexey Milovidov).

NOT FOR CHANGELOG / INSIGNIFICANT