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sidebar_position: 1
sidebar_label: 2023
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# 2023 Changelog

### ClickHouse release v23.8.5.16-lts (e8a1af5fe2f) FIXME as compared to v23.8.4.69-lts (d4d1e7b9ded)

#### Build/Testing/Packaging Improvement
* Backported in [#55830](https://github.com/ClickHouse/ClickHouse/issues/55830): Check sha512 for tgz; use a proper repository for keeper; write only filenames to TGZ.sha512 files for tarball packages. Prerequisite for [#31473](https://github.com/ClickHouse/ClickHouse/issues/31473). [#55717](https://github.com/ClickHouse/ClickHouse/pull/55717) ([Mikhail f. Shiryaev](https://github.com/Felixoid)).

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

* Backported in [#55736](https://github.com/ClickHouse/ClickHouse/issues/55736): Fix iceberg metadata parsing - delete files were not checked. [#55144](https://github.com/ClickHouse/ClickHouse/pull/55144) ([Kseniia Sumarokova](https://github.com/kssenii)).
* Backported in [#55969](https://github.com/ClickHouse/ClickHouse/issues/55969): Try to fix possible segfault in Native ORC input format. Closes [#55873](https://github.com/ClickHouse/ClickHouse/issues/55873). [#55891](https://github.com/ClickHouse/ClickHouse/pull/55891) ([Kruglov Pavel](https://github.com/Avogar)).
* Backported in [#55907](https://github.com/ClickHouse/ClickHouse/issues/55907): Fix window functions in case of sparse columns. Previously some queries with window functions returned invalid results or made ClickHouse crash when the columns were sparse. [#55895](https://github.com/ClickHouse/ClickHouse/pull/55895) ([János Benjamin Antal](https://github.com/antaljanosbenjamin)).

#### NOT FOR CHANGELOG / INSIGNIFICANT

* Use `--filter` to reduce checkout time [#54857](https://github.com/ClickHouse/ClickHouse/pull/54857) ([Mikhail f. Shiryaev](https://github.com/Felixoid)).
* One final leftover in diff_urls of PRInfo [#55874](https://github.com/ClickHouse/ClickHouse/pull/55874) ([Mikhail f. Shiryaev](https://github.com/Felixoid)).
* Bring relevant commits from backport/23.8/55336 to 23.8 [#56029](https://github.com/ClickHouse/ClickHouse/pull/56029) ([Austin Kothig](https://github.com/kothiga)).

