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

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Add changelogs for 2020 where the script works
2022-05-24 22:01:42 +00:00
### ClickHouse release v20.9.3.45-stable FIXME as compared to v20.9.2.20-stable
#### Improvement
* Backported in [#15568](https://github.com/ClickHouse/ClickHouse/issues/15568): Now it's possible to change the type of version column for `VersionedCollapsingMergeTree` with `ALTER` query. [#15442](https://github.com/ClickHouse/ClickHouse/pull/15442) ([alesapin](https://github.com/alesapin)).
#### Bug Fix
* Backported in [#15150](https://github.com/ClickHouse/ClickHouse/issues/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](https://github.com/ClickHouse/ClickHouse/issues/14814). [#14843](https://github.com/ClickHouse/ClickHouse/pull/14843) ([Alexander Kuzmenkov](https://github.com/akuzm)).
* Backported in [#15250](https://github.com/ClickHouse/ClickHouse/issues/15250): Fixed segfault in CacheDictionary [#14837](https://github.com/ClickHouse/ClickHouse/issues/14837). [#14879](https://github.com/ClickHouse/ClickHouse/pull/14879) ([Nikita Mikhaylov](https://github.com/nikitamikhaylov)).
* Backported in [#14971](https://github.com/ClickHouse/ClickHouse/issues/14971): Fix to make predicate push down work when subquery contains finalizeAggregation function. Fixes [#14847](https://github.com/ClickHouse/ClickHouse/issues/14847). [#14937](https://github.com/ClickHouse/ClickHouse/pull/14937) ([filimonov](https://github.com/filimonov)).
* Backported in [#15104](https://github.com/ClickHouse/ClickHouse/issues/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](https://github.com/ClickHouse/ClickHouse/pull/15024) ([Alexander Tokmakov](https://github.com/tavplubix)).
* Backported in [#15141](https://github.com/ClickHouse/ClickHouse/issues/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](https://github.com/ClickHouse/ClickHouse/pull/15088) ([Artem Zuikov](https://github.com/4ertus2)).
* Backported in [#15209](https://github.com/ClickHouse/ClickHouse/issues/15209): Adjust decimals field size in mysql column definition packet. [#15152](https://github.com/ClickHouse/ClickHouse/pull/15152) ([maqroll](https://github.com/maqroll)).
* Backported in [#15224](https://github.com/ClickHouse/ClickHouse/issues/15224): Fix bug in table engine `Buffer` which doesn't allow to insert data of new structure into `Buffer` after `ALTER` query. Fixes [#15117](https://github.com/ClickHouse/ClickHouse/issues/15117). [#15192](https://github.com/ClickHouse/ClickHouse/pull/15192) ([alesapin](https://github.com/alesapin)).
* Backported in [#15403](https://github.com/ClickHouse/ClickHouse/issues/15403): Fix instance crash when using joinGet with LowCardinality types. This fixes [#15214](https://github.com/ClickHouse/ClickHouse/issues/15214). [#15220](https://github.com/ClickHouse/ClickHouse/pull/15220) ([Amos Bird](https://github.com/amosbird)).
* Backported in [#15487](https://github.com/ClickHouse/ClickHouse/issues/15487): Fix 'Unknown identifier' in GROUP BY when query has JOIN over Merge table. [#15242](https://github.com/ClickHouse/ClickHouse/pull/15242) ([Artem Zuikov](https://github.com/4ertus2)).
* Backported in [#15282](https://github.com/ClickHouse/ClickHouse/issues/15282): Fix MSan report in QueryLog. Uninitialized memory can be used for the field `memory_usage`. [#15258](https://github.com/ClickHouse/ClickHouse/pull/15258) ([Alexey Milovidov](https://github.com/alexey-milovidov)).
* Backported in [#15401](https://github.com/ClickHouse/ClickHouse/issues/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](https://github.com/ClickHouse/ClickHouse/pull/15299) ([Anton Popov](https://github.com/CurtizJ)).
* Backported in [#15340](https://github.com/ClickHouse/ClickHouse/issues/15340): Fix rare race condition on server startup when system.logs are enabled. [#15300](https://github.com/ClickHouse/ClickHouse/pull/15300) ([alesapin](https://github.com/alesapin)).
* Backported in [#15336](https://github.com/ClickHouse/ClickHouse/issues/15336): Fix race condition during MergeTree table rename and background cleanup. [#15304](https://github.com/ClickHouse/ClickHouse/pull/15304) ([alesapin](https://github.com/alesapin)).
* Backported in [#15588](https://github.com/ClickHouse/ClickHouse/issues/15588): Fix bug where queries like SELECT toStartOfDay(today()) fail complaining about empty time_zone argument. [#15319](https://github.com/ClickHouse/ClickHouse/pull/15319) ([Bharat Nallan](https://github.com/bharatnc)).
* Backported in [#15446](https://github.com/ClickHouse/ClickHouse/issues/15446): Report proper error when the second argument of `boundingRatio` aggregate function has a wrong type. [#15407](https://github.com/ClickHouse/ClickHouse/pull/15407) ([detailyang](https://github.com/detailyang)).
* Backported in [#15507](https://github.com/ClickHouse/ClickHouse/issues/15507): Fix bug with event subscription in DDLWorker which rarely may lead to query hangs in `ON CLUSTER`. Introduced in [#13450](https://github.com/ClickHouse/ClickHouse/issues/13450). [#15477](https://github.com/ClickHouse/ClickHouse/pull/15477) ([alesapin](https://github.com/alesapin)).
* Backported in [#15549](https://github.com/ClickHouse/ClickHouse/issues/15549): Fix `Missing columns` errors when selecting columns which absent in data, but depend on other columns which also absent in data. Fixes [#15530](https://github.com/ClickHouse/ClickHouse/issues/15530). [#15532](https://github.com/ClickHouse/ClickHouse/pull/15532) ([alesapin](https://github.com/alesapin)).
* Backported in [#15560](https://github.com/ClickHouse/ClickHouse/issues/15560): Fix bug when `ILIKE` operator stops being case insensitive if `LIKE` with the same pattern was executed. [#15536](https://github.com/ClickHouse/ClickHouse/pull/15536) ([alesapin](https://github.com/alesapin)).
* Backported in [#15725](https://github.com/ClickHouse/ClickHouse/issues/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](https://github.com/ClickHouse/ClickHouse/pull/15537) ([Alexander Tokmakov](https://github.com/tavplubix)).
* Backported in [#15655](https://github.com/ClickHouse/ClickHouse/issues/15655): Fix 'Database <db> doesn't exist.' in queries with IN and Distributed table when there's no database on initiator. [#15538](https://github.com/ClickHouse/ClickHouse/pull/15538) ([Artem Zuikov](https://github.com/4ertus2)).
* Backported in [#15631](https://github.com/ClickHouse/ClickHouse/issues/15631): Significantly reduce memory usage in AggregatingInOrderTransform/optimize_aggregation_in_order. [#15543](https://github.com/ClickHouse/ClickHouse/pull/15543) ([Azat Khuzhin](https://github.com/azat)).
* Backported in [#15583](https://github.com/ClickHouse/ClickHouse/issues/15583): Prevent the possibility of error message `Could not calculate available disk space (statvfs), errno: 4, strerror: Interrupted system call`. This fixes [#15541](https://github.com/ClickHouse/ClickHouse/issues/15541). [#15557](https://github.com/ClickHouse/ClickHouse/pull/15557) ([Alexey Milovidov](https://github.com/alexey-milovidov)).
* Backported in [#15665](https://github.com/ClickHouse/ClickHouse/issues/15665): Fixed `Element ... is not a constant expression` error when using `JSON*` function result in `VALUES`, `LIMIT` or right side of `IN` operator. [#15589](https://github.com/ClickHouse/ClickHouse/pull/15589) ([Alexander Tokmakov](https://github.com/tavplubix)).
* Backported in [#15712](https://github.com/ClickHouse/ClickHouse/issues/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](https://github.com/ClickHouse/ClickHouse/issues/15610). [#15645](https://github.com/ClickHouse/ClickHouse/pull/15645) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
* Backported in [#15696](https://github.com/ClickHouse/ClickHouse/issues/15696): Fix race condition in AMQP-CPP. [#15667](https://github.com/ClickHouse/ClickHouse/pull/15667) ([alesapin](https://github.com/alesapin)).
* Backported in [#15739](https://github.com/ClickHouse/ClickHouse/issues/15739): Fix error `Cannot find column` which may happen at insertion into `MATERIALIZED VIEW` in case if query for `MV` containes `ARRAY JOIN`. [#15717](https://github.com/ClickHouse/ClickHouse/pull/15717) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
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