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ClickHouse/docs/changelogs/v20.9.3.45-stable.md

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ClickHouse release v20.9.3.45-stable FIXME as compared to v20.9.2.20-stable

Improvement

  • Backported in #15568: Now it's possible to change the type of version column for VersionedCollapsingMergeTree with ALTER query. #15442 (alesapin).

Bug Fix

  • Backported in #15150: Fix a problem where the server may get stuck on startup while talking to ZooKeeper, if the configuration files have to be fetched from ZK (using the from_zk include option). This fixes #14814. #14843 (Alexander Kuzmenkov).
  • Backported in #15250: Fixed segfault in CacheDictionary #14837. #14879 (Nikita Mikhaylov).
  • Backported in #14971: Fix to make predicate push down work when subquery contains finalizeAggregation function. Fixes #14847. #14937 (filimonov).
  • Backported in #15104: Fixed Cannot rename ... errno: 22, strerror: Invalid argument error on DDL query execution in Atomic database when running clickhouse-server in docker on Mac OS. #15024 (Alexander Tokmakov).
  • Backported in #15141: Fixes Data compressed with different methods in join_algorithm='auto'. Keep LowCardinality as type for left table join key in join_algorithm='partial_merge'. #15088 (Artem Zuikov).
  • Backported in #15209: Adjust decimals field size in mysql column definition packet. #15152 (maqroll).
  • Backported in #15224: Fix bug in table engine Buffer which doesn't allow to insert data of new structure into Buffer after ALTER query. Fixes #15117. #15192 (alesapin).
  • Backported in #15403: Fix instance crash when using joinGet with LowCardinality types. This fixes #15214. #15220 (Amos Bird).
  • Backported in #15487: Fix 'Unknown identifier' in GROUP BY when query has JOIN over Merge table. #15242 (Artem Zuikov).
  • Backported in #15282: Fix MSan report in QueryLog. Uninitialized memory can be used for the field memory_usage. #15258 (Alexey Milovidov).
  • Backported in #15401: Fix hang of queries with a lot of subqueries to same table of MySQL engine. Previously, if there were more than 16 subqueries to same MySQL table in query, it hang forever. #15299 (Anton Popov).
  • Backported in #15340: Fix rare race condition on server startup when system.logs are enabled. #15300 (alesapin).
  • Backported in #15336: Fix race condition during MergeTree table rename and background cleanup. #15304 (alesapin).
  • Backported in #15588: Fix bug where queries like SELECT toStartOfDay(today()) fail complaining about empty time_zone argument. #15319 (Bharat Nallan).
  • Backported in #15446: Report proper error when the second argument of boundingRatio aggregate function has a wrong type. #15407 (detailyang).
  • Backported in #15507: Fix bug with event subscription in DDLWorker which rarely may lead to query hangs in ON CLUSTER. Introduced in #13450. #15477 (alesapin).
  • Backported in #15549: Fix Missing columns errors when selecting columns which absent in data, but depend on other columns which also absent in data. Fixes #15530. #15532 (alesapin).
  • Backported in #15560: Fix bug when ILIKE operator stops being case insensitive if LIKE with the same pattern was executed. #15536 (alesapin).
  • Backported in #15725: Mutation might hang waiting for some non-existent part after MOVE or REPLACE PARTITION or, in rare cases, after DETACH or DROP PARTITION. It's fixed. #15537 (Alexander Tokmakov).
  • Backported in #15655: Fix 'Database doesn't exist.' in queries with IN and Distributed table when there's no database on initiator. #15538 (Artem Zuikov).
  • Backported in #15631: Significantly reduce memory usage in AggregatingInOrderTransform/optimize_aggregation_in_order. #15543 (Azat Khuzhin).
  • Backported in #15583: Prevent the possibility of error message Could not calculate available disk space (statvfs), errno: 4, strerror: Interrupted system call. This fixes #15541. #15557 (Alexey Milovidov).
  • Backported in #15665: Fixed Element ... is not a constant expression error when using JSON* function result in VALUES, LIMIT or right side of IN operator. #15589 (Alexander Tokmakov).
  • Backported in #15712: Fix the order of destruction for resources in ReadFromStorage step of query plan. It might cause crashes in rare cases. Possibly connected with #15610. #15645 (Nikolai Kochetov).
  • Backported in #15696: Fix race condition in AMQP-CPP. #15667 (alesapin).
  • Backported in #15739: Fix error Cannot find column which may happen at insertion into MATERIALIZED VIEW in case if query for MV containes ARRAY JOIN. #15717 (Nikolai Kochetov).