---
sidebar_position: 1
sidebar_label: 2023
---

# 2023 Changelog

### ClickHouse release v23.3.3.52-lts (cb963c474db) FIXME as compared to v23.3.2.37-lts (1b144bcd101)

#### Improvement
* Backported in [#49954](https://github.com/ClickHouse/ClickHouse/issues/49954): Add support for (an unusual) case where the arguments in the `IN` operator are single-element tuples. [#49844](https://github.com/ClickHouse/ClickHouse/pull/49844) ([MikhailBurdukov](https://github.com/MikhailBurdukov)).

#### Build/Testing/Packaging Improvement
* Backported in [#49210](https://github.com/ClickHouse/ClickHouse/issues/49210): Fix glibc compatibility check: replace `preadv` from musl. [#49144](https://github.com/ClickHouse/ClickHouse/pull/49144) ([alesapin](https://github.com/alesapin)).

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

* Fix aggregate empty string error [#48999](https://github.com/ClickHouse/ClickHouse/pull/48999) ([LiuNeng](https://github.com/liuneng1994)).
* Fix key not found error for queries with multiple StorageJoin [#49137](https://github.com/ClickHouse/ClickHouse/pull/49137) ([vdimir](https://github.com/vdimir)).
* Fix race on Outdated parts loading [#49223](https://github.com/ClickHouse/ClickHouse/pull/49223) ([Alexander Tokmakov](https://github.com/tavplubix)).
* Fix bug in DISTINCT [#49628](https://github.com/ClickHouse/ClickHouse/pull/49628) ([Alexey Milovidov](https://github.com/alexey-milovidov)).
* Fix msan issue in randomStringUTF8(<uneven number>) [#49750](https://github.com/ClickHouse/ClickHouse/pull/49750) ([Robert Schulze](https://github.com/rschu1ze)).
* fix `is_prefix` in OptimizeRegularExpression [#49919](https://github.com/ClickHouse/ClickHouse/pull/49919) ([Han Fei](https://github.com/hanfei1991)).
* Fix IPv6 encoding in protobuf [#49933](https://github.com/ClickHouse/ClickHouse/pull/49933) ([Yakov Olkhovskiy](https://github.com/yakov-olkhovskiy)).
* Avoid deadlock when starting table in attach thread of `ReplicatedMergeTree` [#50026](https://github.com/ClickHouse/ClickHouse/pull/50026) ([Antonio Andelic](https://github.com/antonio2368)).
* JIT compilation not equals NaN fix [#50056](https://github.com/ClickHouse/ClickHouse/pull/50056) ([Maksim Kita](https://github.com/kitaisreal)).
* Fix crash with `multiIf` and constant condition and nullable arguments [#50123](https://github.com/ClickHouse/ClickHouse/pull/50123) ([Anton Popov](https://github.com/CurtizJ)).
* Fix reconnecting of HTTPS session when target host IP was changed [#50240](https://github.com/ClickHouse/ClickHouse/pull/50240) ([Aleksei Filatov](https://github.com/aalexfvk)).
* Fixed type conversion from Date/Date32 to DateTime64 when querying with DateTime64 index [#50280](https://github.com/ClickHouse/ClickHouse/pull/50280) ([Lucas Chang](https://github.com/lucas-tubi)).
* Fix Keeper deadlock on exception when preprocessing requests. [#50387](https://github.com/ClickHouse/ClickHouse/pull/50387) ([frinkr](https://github.com/frinkr)).
* Fix incorrect constant folding [#50536](https://github.com/ClickHouse/ClickHouse/pull/50536) ([Alexey Milovidov](https://github.com/alexey-milovidov)).
* Fix Log family table return wrong rows count after truncate [#50585](https://github.com/ClickHouse/ClickHouse/pull/50585) ([flynn](https://github.com/ucasfl)).
* Fix bug in `uniqExact` parallel merging [#50590](https://github.com/ClickHouse/ClickHouse/pull/50590) ([Nikita Taranov](https://github.com/nickitat)).
* Do not read all the columns from right GLOBAL JOIN table. [#50721](https://github.com/ClickHouse/ClickHouse/pull/50721) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).

#### NOT FOR CHANGELOG / INSIGNIFICANT

* Implement status comment [#48468](https://github.com/ClickHouse/ClickHouse/pull/48468) ([Mikhail f. Shiryaev](https://github.com/Felixoid)).
* Update curl to 8.0.1 (for CVEs) [#48765](https://github.com/ClickHouse/ClickHouse/pull/48765) ([Boris Kuschel](https://github.com/bkuschel)).
* Improve test reports [#49151](https://github.com/ClickHouse/ClickHouse/pull/49151) ([Mikhail f. Shiryaev](https://github.com/Felixoid)).
* Fallback auth gh api [#49314](https://github.com/ClickHouse/ClickHouse/pull/49314) ([Mikhail f. Shiryaev](https://github.com/Felixoid)).
* Improve CI: status commit, auth for get_gh_api [#49388](https://github.com/ClickHouse/ClickHouse/pull/49388) ([Mikhail f. Shiryaev](https://github.com/Felixoid)).
* Update github.com/distribution/distribution [#50114](https://github.com/ClickHouse/ClickHouse/pull/50114) ([Mikhail f. Shiryaev](https://github.com/Felixoid)).
* Catch issues with dockerd during the build [#50700](https://github.com/ClickHouse/ClickHouse/pull/50700) ([Mikhail f. Shiryaev](https://github.com/Felixoid)).