ClickHouse/docs/changelogs/v21.4.3.21-stable.md

ClickHouse release v21.4.3.21-stable FIXME as compared to v21.4.2.10-prestable

Improvement

• Backported in #22934: Correctly check structure of async distributed blocks. #22325 (Azat Khuzhin).

Bug Fix

• Backported in #22966: Fix very rare bug when quorum insert with quorum_parallel=1 is not really "quorum" because of deduplication. #18215 (filimonov).
• Backported in #22722: Check if table function view is used as a column. This complements https://github.com/ClickHouse/ClickHouse/pull/20350. #21465 (Amos Bird).
• Backported in #22808: Follow-up fix for #21936. Also fixes #22433. #22518 (Ivan).
• Backported in #22757: Fix usage of function map in distributed queries. #22588 (foolchi).
• Backported in #22702: Fix wait for mutations on several replicas for ReplicatedMergeTree table engines. Previously, mutation/alter query may finish before mutation actually executed on other replicas. #22669 (alesapin).
• Backported in #22741: Fix possible hangs in zk requests in case of OOM exception. Fixes #22438. #22684 (Nikolai Kochetov).
• Backported in #22888: Fix approx total rows accounting for reverse reading from MergeTree. #22726 (Azat Khuzhin).
• Backported in #22884: Fix pushdown of HAVING in case, when filter column is used in aggregation. #22763 (Anton Popov).
• Backported in #22917: LIVE VIEW (experimental feature). Fix possible hanging in concurrent DROP/CREATE of TEMPORARY LIVE VIEW in TemporaryLiveViewCleaner, see https://gist.github.com/vzakaznikov/0c03195960fc86b56bfe2bc73a90019e. #22858 (Vitaly Baranov).
• Backported in #22921: Fixed a crash when using mannWhitneyUTest and rankCorr with window functions. This fixes #22728. #22876 (Nikita Mikhaylov).
• Backported in #22957: Fix usage of constant columns of type Map with nullable values. #22939 (Anton Popov).