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sidebar_position: 1
sidebar_label: 2023
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# 2023 Changelog

### ClickHouse release v23.8.3.48-lts (ebe4eb3d23e) FIXME as compared to v23.8.2.7-lts (f73c8f37874)

#### Improvement
* Backported in [#54287](https://github.com/ClickHouse/ClickHouse/issues/54287): Enable allow_remove_stale_moving_parts by default. [#54260](https://github.com/ClickHouse/ClickHouse/pull/54260) ([vdimir](https://github.com/vdimir)).
* Backported in [#55057](https://github.com/ClickHouse/ClickHouse/issues/55057): ProfileEvents added ContextLockWaitMicroseconds event. [#55029](https://github.com/ClickHouse/ClickHouse/pull/55029) ([Maksim Kita](https://github.com/kitaisreal)).

#### Build/Testing/Packaging Improvement
* Backported in [#54702](https://github.com/ClickHouse/ClickHouse/issues/54702): Enrich `changed_images.json` with the latest tag from master for images that are not changed in the pull request. [#54369](https://github.com/ClickHouse/ClickHouse/pull/54369) ([János Benjamin Antal](https://github.com/antaljanosbenjamin)).
* Backported in [#54743](https://github.com/ClickHouse/ClickHouse/issues/54743): Remove redundant `clickhouse-keeper-client` symlink. [#54587](https://github.com/ClickHouse/ClickHouse/pull/54587) ([Tomas Barton](https://github.com/deric)).
* Backported in [#54685](https://github.com/ClickHouse/ClickHouse/issues/54685): We build and upload them for every push, which isn't worth it. [#54675](https://github.com/ClickHouse/ClickHouse/pull/54675) ([Mikhail f. Shiryaev](https://github.com/Felixoid)).

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

* Fix: moved to prewhere condition actions can lose column [#53492](https://github.com/ClickHouse/ClickHouse/pull/53492) ([Yakov Olkhovskiy](https://github.com/yakov-olkhovskiy)).
* Fix: parallel replicas over distributed with prefer_localhost_replica=1 [#54334](https://github.com/ClickHouse/ClickHouse/pull/54334) ([Igor Nikonov](https://github.com/devcrafter)).
* Fix possible error 'URI contains invalid characters' in s3 table function [#54373](https://github.com/ClickHouse/ClickHouse/pull/54373) ([Kruglov Pavel](https://github.com/Avogar)).
* Check for overflow before addition in `analysisOfVariance` function [#54385](https://github.com/ClickHouse/ClickHouse/pull/54385) ([Antonio Andelic](https://github.com/antonio2368)).
* reproduce and fix the bug in removeSharedRecursive [#54430](https://github.com/ClickHouse/ClickHouse/pull/54430) ([Sema Checherinda](https://github.com/CheSema)).
* Fix aggregate projections with normalized states [#54480](https://github.com/ClickHouse/ClickHouse/pull/54480) ([Amos Bird](https://github.com/amosbird)).
* Fix possible parsing error in WithNames formats with disabled input_format_with_names_use_header [#54513](https://github.com/ClickHouse/ClickHouse/pull/54513) ([Kruglov Pavel](https://github.com/Avogar)).
* Fix zero copy garbage [#54550](https://github.com/ClickHouse/ClickHouse/pull/54550) ([Alexander Tokmakov](https://github.com/tavplubix)).
* Fix race in `ColumnUnique` [#54575](https://github.com/ClickHouse/ClickHouse/pull/54575) ([Nikita Taranov](https://github.com/nickitat)).
* Fix serialization of `ColumnDecimal` [#54601](https://github.com/ClickHouse/ClickHouse/pull/54601) ([Nikita Taranov](https://github.com/nickitat)).
* Fix virtual columns having incorrect values after ORDER BY [#54811](https://github.com/ClickHouse/ClickHouse/pull/54811) ([Michael Kolupaev](https://github.com/al13n321)).
* Fix Keeper segfault during shutdown [#54841](https://github.com/ClickHouse/ClickHouse/pull/54841) ([Antonio Andelic](https://github.com/antonio2368)).
* Rebuild minmax_count_projection when partition key gets modified [#54943](https://github.com/ClickHouse/ClickHouse/pull/54943) ([Amos Bird](https://github.com/amosbird)).

#### NOT FOR CHANGELOG / INSIGNIFICANT

* Test libunwind changes. [#51436](https://github.com/ClickHouse/ClickHouse/pull/51436) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
* Use pathlib.Path in S3Helper, rewrite build reports, improve small things [#54010](https://github.com/ClickHouse/ClickHouse/pull/54010) ([Mikhail f. Shiryaev](https://github.com/Felixoid)).
* Properly re-initialize ZooKeeper fault injection [#54251](https://github.com/ClickHouse/ClickHouse/pull/54251) ([Alexander Gololobov](https://github.com/davenger)).
* Fix segfault in system.zookeeper [#54326](https://github.com/ClickHouse/ClickHouse/pull/54326) ([Alexander Tokmakov](https://github.com/tavplubix)).
* Update automated commit status comment [#54441](https://github.com/ClickHouse/ClickHouse/pull/54441) ([vdimir](https://github.com/vdimir)).
* Adjusting `num_streams` by expected work in StorageS3 [#54815](https://github.com/ClickHouse/ClickHouse/pull/54815) ([pufit](https://github.com/pufit)).