ClickHouse/docs/changelogs/v21.7.7.47-stable.md

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sidebar_label: 2022
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# 2022 Changelog

### ClickHouse release v21.7.7.47-stable FIXME as compared to v21.7.6.39-stable

#### Bug Fix
* Backported in [#27364](https://github.com/ClickHouse/ClickHouse/issues/27364): - Fix uninitialized memory in functions `multiSearch*` with empty array, close [#27169](https://github.com/ClickHouse/ClickHouse/issues/27169). [#27181](https://github.com/ClickHouse/ClickHouse/pull/27181) ([Vladimir C](https://github.com/vdimir)).
* Backported in [#27412](https://github.com/ClickHouse/ClickHouse/issues/27412): Fix `distributed_group_by_no_merge=2`+`distributed_push_down_limit=1` or `optimize_distributed_group_by_sharding_key=1` with `LIMIT BY` and `LIMIT OFFSET`. [#27249](https://github.com/ClickHouse/ClickHouse/pull/27249) ([Azat Khuzhin](https://github.com/azat)).
* Backported in [#27418](https://github.com/ClickHouse/ClickHouse/issues/27418): Fix `Cannot find column` error for queries with sampling. Was introduced in [#24574](https://github.com/ClickHouse/ClickHouse/issues/24574). Fixes [#26522](https://github.com/ClickHouse/ClickHouse/issues/26522). [#27301](https://github.com/ClickHouse/ClickHouse/pull/27301) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
* Backported in [#27416](https://github.com/ClickHouse/ClickHouse/issues/27416): Fixed incorrect validation of partition id for MergeTree tables that created with old syntax. [#27328](https://github.com/ClickHouse/ClickHouse/pull/27328) ([Alexander Tokmakov](https://github.com/tavplubix)).

#### NOT FOR CHANGELOG / INSIGNIFICANT

* Fix parallel execution of integration tests [#25986](https://github.com/ClickHouse/ClickHouse/pull/25986) ([Vitaly Baranov](https://github.com/vitlibar)).
* Fix mysql_kill_sync_thread_restore_test [#26673](https://github.com/ClickHouse/ClickHouse/pull/26673) ([Vladimir C](https://github.com/vdimir)).
* Wait for self datasource to be initialized in test_jdbc_bridge [#26827](https://github.com/ClickHouse/ClickHouse/pull/26827) ([Ilya Yatsishin](https://github.com/qoega)).
* Better integration tests [#26894](https://github.com/ClickHouse/ClickHouse/pull/26894) ([Ilya Yatsishin](https://github.com/qoega)).
* Implement `legacy_column_name_of_tuple_literal` in a less intrusive way [#27153](https://github.com/ClickHouse/ClickHouse/pull/27153) ([Anton Popov](https://github.com/CurtizJ)).
* Update PVS checksum [#27317](https://github.com/ClickHouse/ClickHouse/pull/27317) ([Alexander Tokmakov](https://github.com/tavplubix)).