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2022 Changelog
ClickHouse release v21.4.7.3-stable FIXME as compared to v21.4.6.55-stable
Bug Fix
- Backported in #23971: Fixed a bug in recovery of staled
ReplicatedMergeTree
replica. Some metadata updates could be ignored by staled replica ifALTER
query was executed during downtime of the replica. #23742 (Alexander Tokmakov). - Backported in #23819: Fix crash when
PREWHERE
and row policy filter are both in effect with empty result. #23763 (Amos Bird). - Backported in #23816: Fix
CLEAR COLUMN
does not work when it is referenced by materialized view. Close #23764. #23781 (flynn). - Backported in #23831: Fix error
Can't initialize pipeline with empty pipe
for queries withGLOBAL IN/JOIN
anduse_hedged_requests
. Fixes #23431. #23805 (Nikolai Kochetov). - Backported in #23930: HashedDictionary complex key update field initial load fix. Closes #23800. #23824 (Maksim Kita).
- Backported in #23957: Fix keys metrics accounting for CACHE() dictionary with duplicates in the source (leads to
DictCacheKeysRequestedMiss
overflows). #23929 (Azat Khuzhin). - Backported in #24003: Fix SIGSEGV for external GROUP BY and overflow row (i.e. queries like
SELECT FROM GROUP BY WITH TOTALS SETTINGS max_bytes_before_external_group_by>0, max_rows_to_group_by>0, group_by_overflow_mode='any', totals_mode='before_having'
). #23962 (Azat Khuzhin). - Backported in #24188: Some
ALTER PARTITION
queries might causePart A intersects previous part B
andUnexpected merged part C intersecting drop range D
errors in replication queue. It's fixed. Fixes #23296. #23997 (Alexander Tokmakov). - Backported in #24031: Fix crash in MergeJoin, close #24010. #24013 (Vladimir C).
- Backported in #24141: Bug: explain pipeline with
select xxx final
shows wrong pipeline: ``` dell123 :) explain pipeline select z from prewhere_move_select_final final;. #24116 (hexiaoting). - Backported in #24171: Fix a rare bug that could lead to a partially initialized table that can serve write requests (insert/alter/so on). Now such tables will be in readonly mode. #24122 (alesapin).
- Backported in #24215: Fix race condition which could happen in RBAC under a heavy load. This PR fixes #24090, #24134,. #24176 (Vitaly Baranov).
- Backported in #24243: Fix abnormal server termination due to hdfs becoming not accessible during query execution. Closes #24117. #24191 (Kseniia Sumarokova).
NOT FOR CHANGELOG / INSIGNIFICANT
- Flat, Hashed dictionary include update field bytes into bytes_allocated #23825 (Maksim Kita).