ClickHouse/docs/changelogs/v21.11.7.9-stable.md

### ClickHouse release v21.11.7.9-stable FIXME as compared to v21.11.6.7-stable

#### Bug Fix
* Backported in [#32691](https://github.com/ClickHouse/ClickHouse/issues/32691): Quota limit was not reached, but the limit was exceeded. This PR fixes [#31174](https://github.com/ClickHouse/ClickHouse/issues/31174). [#31656](https://github.com/ClickHouse/ClickHouse/pull/31656) ([sunny](https://github.com/sunny19930321)).

#### Bug Fix (user-visible misbehaviour in official stable or prestable release)

* Backported in [#32711](https://github.com/ClickHouse/ClickHouse/issues/32711): Fix failures in queries that are trying to use skipping indices, which are not materialized yet. Fixes [#32292](https://github.com/ClickHouse/ClickHouse/issues/32292) and [#30343](https://github.com/ClickHouse/ClickHouse/issues/30343). [#32359](https://github.com/ClickHouse/ClickHouse/pull/32359) ([Anton Popov](https://github.com/CurtizJ)).
* Backported in [#32568](https://github.com/ClickHouse/ClickHouse/issues/32568): Fix crash in `JoinCommon::removeColumnNullability`, close [#32458](https://github.com/ClickHouse/ClickHouse/issues/32458). [#32508](https://github.com/ClickHouse/ClickHouse/pull/32508) ([Vladimir C](https://github.com/vdimir)).
* Backported in [#32732](https://github.com/ClickHouse/ClickHouse/issues/32732): Fix surprisingly bad code in function `file`. [#32640](https://github.com/ClickHouse/ClickHouse/pull/32640) ([Alexey Milovidov](https://github.com/alexey-milovidov)).

#### Bug Fix (user-visible misbehaviour in official stable or prestable release):

* Backported in [#32617](https://github.com/ClickHouse/ClickHouse/issues/32617): Fix possible crash (or incorrect result) in case of `LowCardinality` arguments of window function. Fixes [#31114](https://github.com/ClickHouse/ClickHouse/issues/31114). [#31888](https://github.com/ClickHouse/ClickHouse/pull/31888) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).