ClickHouse/docs/changelogs/v21.7.8.58-stable.md

### ClickHouse release v21.7.8.58-stable FIXME as compared to v21.7.7.47-stable

#### Bug Fix
* Backported in [#27506](https://github.com/ClickHouse/ClickHouse/issues/27506): Fix errors like `Expected ColumnLowCardinality, gotUInt8` or `Bad cast from type DB::ColumnVector<char8_t> to DB::ColumnLowCardinality` for some queries with `LowCardinality` in `PREWHERE`. Fixes [#23515](https://github.com/ClickHouse/ClickHouse/issues/23515). [#27298](https://github.com/ClickHouse/ClickHouse/pull/27298) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
* Backported in [#27644](https://github.com/ClickHouse/ClickHouse/issues/27644): Fix incorrect result for query with row-level security, prewhere and LowCardinality filter. Fixes [#27179](https://github.com/ClickHouse/ClickHouse/issues/27179). [#27329](https://github.com/ClickHouse/ClickHouse/pull/27329) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
* Backported in [#27474](https://github.com/ClickHouse/ClickHouse/issues/27474): fix metric BackgroundMessageBrokerSchedulePoolTask, maybe mistyped。. [#27452](https://github.com/ClickHouse/ClickHouse/pull/27452) ([Ben](https://github.com/benbiti)).
* Backported in [#27649](https://github.com/ClickHouse/ClickHouse/issues/27649): Fix crash during projection materialization when some parts contain missing columns. This fixes [#27512](https://github.com/ClickHouse/ClickHouse/issues/27512). [#27528](https://github.com/ClickHouse/ClickHouse/pull/27528) ([Amos Bird](https://github.com/amosbird)).
* Backported in [#27778](https://github.com/ClickHouse/ClickHouse/issues/27778): - Fix bug with aliased column in `Distributed` table. [#27652](https://github.com/ClickHouse/ClickHouse/pull/27652) ([Vladimir C](https://github.com/vdimir)).
* Backported in [#27674](https://github.com/ClickHouse/ClickHouse/issues/27674): Fix postgresql table function resulting in non-closing connections. Closes [#26088](https://github.com/ClickHouse/ClickHouse/issues/26088). [#27662](https://github.com/ClickHouse/ClickHouse/pull/27662) ([Kseniia Sumarokova](https://github.com/kssenii)).
* Backported in [#27697](https://github.com/ClickHouse/ClickHouse/issues/27697): Fix bad type cast when functions like `arrayHas` are applied to arrays of LowCardinality of Nullable of different non-numeric types like `DateTime` and `DateTime64`. In previous versions bad cast occurs. In new version it will lead to exception. This closes [#26330](https://github.com/ClickHouse/ClickHouse/issues/26330). [#27682](https://github.com/ClickHouse/ClickHouse/pull/27682) ([Alexey Milovidov](https://github.com/alexey-milovidov)).
* Backported in [#27748](https://github.com/ClickHouse/ClickHouse/issues/27748): Remove duplicated source files in CMakeLists.txt in arrow-cmake. [#27736](https://github.com/ClickHouse/ClickHouse/pull/27736) ([李扬](https://github.com/taiyang-li)).