ClickHouse/docs/changelogs/v21.8.4.51-lts.md

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# 2022 Changelog

### ClickHouse release v21.8.4.51-lts FIXME as compared to v21.8.3.44-lts

#### Bug Fix
* Backported in [#27650](https://github.com/ClickHouse/ClickHouse/issues/27650): 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 [#27625](https://github.com/ClickHouse/ClickHouse/issues/27625): Fixed underflow of the time value when constructing it from components. Closes [#27193](https://github.com/ClickHouse/ClickHouse/issues/27193). [#27605](https://github.com/ClickHouse/ClickHouse/pull/27605) ([Vasily Nemkov](https://github.com/Enmk)).
* Backported in [#27779](https://github.com/ClickHouse/ClickHouse/issues/27779): - Fix bug with aliased column in `Distributed` table. [#27652](https://github.com/ClickHouse/ClickHouse/pull/27652) ([Vladimir C](https://github.com/vdimir)).
* Backported in [#27713](https://github.com/ClickHouse/ClickHouse/issues/27713): Fixed another case of `Unexpected merged part ... intersecting drop range ...` error. [#27656](https://github.com/ClickHouse/ClickHouse/pull/27656) ([Alexander Tokmakov](https://github.com/tavplubix)).
* Backported in [#27673](https://github.com/ClickHouse/ClickHouse/issues/27673): 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 [#27700](https://github.com/ClickHouse/ClickHouse/issues/27700): 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 [#27747](https://github.com/ClickHouse/ClickHouse/issues/27747): 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)).