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sidebar_position: 1
sidebar_label: 2023
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# 2023 Changelog

### ClickHouse release v22.8.20.11-lts (c9ca79e24e8) FIXME as compared to v22.8.19.10-lts (989bc2fe8b0)

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

* Fix broken index analysis when binary operator contains a null constant argument [#50177](https://github.com/ClickHouse/ClickHouse/pull/50177) ([Amos Bird](https://github.com/amosbird)).
* Fix incorrect constant folding [#50536](https://github.com/ClickHouse/ClickHouse/pull/50536) ([Alexey Milovidov](https://github.com/alexey-milovidov)).
* Fix fuzzer failure in ActionsDAG [#51301](https://github.com/ClickHouse/ClickHouse/pull/51301) ([Alexey Milovidov](https://github.com/alexey-milovidov)).
* Fix segfault in MathUnary [#51499](https://github.com/ClickHouse/ClickHouse/pull/51499) ([Ilya Yatsishin](https://github.com/qoega)).

#### NOT FOR CHANGELOG / INSIGNIFICANT

* Decoupled commits from [#51180](https://github.com/ClickHouse/ClickHouse/issues/51180) for backports [#51561](https://github.com/ClickHouse/ClickHouse/pull/51561) ([Mikhail f. Shiryaev](https://github.com/Felixoid)).