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sidebar_position: 1
sidebar_label: 2024
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# 2024 Changelog

### ClickHouse release v24.1.8.22-stable (7fb8f96d3da) FIXME as compared to v24.1.7.18-stable (90925babd78)

#### Bug Fix (user-visible misbehavior in an official stable release)

* Backported in [#61451](https://github.com/ClickHouse/ClickHouse/issues/61451): Fix possible incorrect result of aggregate function `uniqExact`. [#61257](https://github.com/ClickHouse/ClickHouse/pull/61257) ([Anton Popov](https://github.com/CurtizJ)).
* Backported in [#61844](https://github.com/ClickHouse/ClickHouse/issues/61844): Fixed possible wrong result of aggregation with nullable keys. [#61393](https://github.com/ClickHouse/ClickHouse/pull/61393) ([Anton Popov](https://github.com/CurtizJ)).
* Backported in [#61746](https://github.com/ClickHouse/ClickHouse/issues/61746): Fix incorrect results when filtering `system.parts` or `system.parts_columns` using UUID. [#61479](https://github.com/ClickHouse/ClickHouse/pull/61479) ([Dan Wu](https://github.com/wudanzy)).
* Backported in [#61696](https://github.com/ClickHouse/ClickHouse/issues/61696): Fix `clickhouse-client -s` argument, it was broken by defining it two times. [#61530](https://github.com/ClickHouse/ClickHouse/pull/61530) ([Mikhail f. Shiryaev](https://github.com/Felixoid)).
* Backported in [#61576](https://github.com/ClickHouse/ClickHouse/issues/61576): Fix string search with constant start position which previously could lead to memory corruption. [#61547](https://github.com/ClickHouse/ClickHouse/pull/61547) ([Antonio Andelic](https://github.com/antonio2368)).
* Backported in [#61858](https://github.com/ClickHouse/ClickHouse/issues/61858): Fix crash in `multiSearchAllPositionsCaseInsensitiveUTF8` when specifying incorrect UTF-8 sequence. Example: [#61714](https://github.com/ClickHouse/ClickHouse/issues/61714#issuecomment-2012768202). [#61749](https://github.com/ClickHouse/ClickHouse/pull/61749) ([pufit](https://github.com/pufit)).

#### CI Fix or Improvement (changelog entry is not required)

* Backported in [#61431](https://github.com/ClickHouse/ClickHouse/issues/61431):. [#61374](https://github.com/ClickHouse/ClickHouse/pull/61374) ([Mikhail f. Shiryaev](https://github.com/Felixoid)).
* Backported in [#61488](https://github.com/ClickHouse/ClickHouse/issues/61488): ... [#61441](https://github.com/ClickHouse/ClickHouse/pull/61441) ([Max K.](https://github.com/maxknv)).
* Backported in [#61642](https://github.com/ClickHouse/ClickHouse/issues/61642):. [#61592](https://github.com/ClickHouse/ClickHouse/pull/61592) ([Mikhail f. Shiryaev](https://github.com/Felixoid)).

#### NO CL ENTRY

* NO CL ENTRY:  'Revert "Backport [#61479](https://github.com/ClickHouse/ClickHouse/issues/61479) to 24.1: Fix bug when reading system.parts using UUID (issue 61220)."'. [#61775](https://github.com/ClickHouse/ClickHouse/pull/61775) ([János Benjamin Antal](https://github.com/antaljanosbenjamin)).

#### NOT FOR CHANGELOG / INSIGNIFICANT

* Speed up cctools building [#61011](https://github.com/ClickHouse/ClickHouse/pull/61011) ([Mikhail f. Shiryaev](https://github.com/Felixoid)).