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sidebar_position: 1
sidebar_label: 2023
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# 2023 Changelog

### ClickHouse release v23.8.7.24-lts (812b95e14ba) FIXME as compared to v23.8.6.16-lts (077df679bed)

#### Build/Testing/Packaging Improvement
* Backported in [#56733](https://github.com/ClickHouse/ClickHouse/issues/56733): Do not fetch changed submodules in the builder container. [#56689](https://github.com/ClickHouse/ClickHouse/pull/56689) ([Mikhail f. Shiryaev](https://github.com/Felixoid)).

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

* Backported in [#56581](https://github.com/ClickHouse/ClickHouse/issues/56581): Prevent reference to a remote data source for the `data_paths` column in `system.tables` if the table is created with a table function using explicit column description. [#55540](https://github.com/ClickHouse/ClickHouse/pull/55540) ([MikhailBurdukov](https://github.com/MikhailBurdukov)).
* Backported in [#56877](https://github.com/ClickHouse/ClickHouse/issues/56877): Fix incomplete query result for `UNION` in `view()` table function. [#56274](https://github.com/ClickHouse/ClickHouse/pull/56274) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
* Backported in [#56409](https://github.com/ClickHouse/ClickHouse/issues/56409): Prohibit adding a column with type `Object(JSON)` to an existing table. This closes: [#56095](https://github.com/ClickHouse/ClickHouse/issues/56095) This closes: [#49944](https://github.com/ClickHouse/ClickHouse/issues/49944). [#56307](https://github.com/ClickHouse/ClickHouse/pull/56307) ([Nikita Mikhaylov](https://github.com/nikitamikhaylov)).
* Backported in [#56756](https://github.com/ClickHouse/ClickHouse/issues/56756): Fix a segfault caused by a thrown exception in Kerberos initialization during the creation of the Kafka table. Closes [#56073](https://github.com/ClickHouse/ClickHouse/issues/56073). [#56401](https://github.com/ClickHouse/ClickHouse/pull/56401) ([Nikolay Degterinsky](https://github.com/evillique)).
* Backported in [#56748](https://github.com/ClickHouse/ClickHouse/issues/56748): Fixed the issue that the RabbitMQ table engine wasn't able to connect to RabbitMQ over a secure connection. [#56703](https://github.com/ClickHouse/ClickHouse/pull/56703) ([Igor Nikonov](https://github.com/devcrafter)).
* Backported in [#56839](https://github.com/ClickHouse/ClickHouse/issues/56839): The server crashed when decompressing malformed data using the `FPC` codec. This issue was found with [ClickHouse Bug Bounty Program](https://github.com/ClickHouse/ClickHouse/issues/38986) by https://twitter.com/malacupa. [#56795](https://github.com/ClickHouse/ClickHouse/pull/56795) ([Alexey Milovidov](https://github.com/alexey-milovidov)).

#### NO CL CATEGORY

* Backported in [#56601](https://github.com/ClickHouse/ClickHouse/issues/56601):. [#56598](https://github.com/ClickHouse/ClickHouse/pull/56598) ([Maksim Kita](https://github.com/kitaisreal)).

#### NOT FOR CHANGELOG / INSIGNIFICANT

* Rewrite jobs to use callable workflow [#56385](https://github.com/ClickHouse/ClickHouse/pull/56385) ([Mikhail f. Shiryaev](https://github.com/Felixoid)).
* Continue rewriting workflows to reusable tests [#56501](https://github.com/ClickHouse/ClickHouse/pull/56501) ([Mikhail f. Shiryaev](https://github.com/Felixoid)).
* Better exception messages [#56854](https://github.com/ClickHouse/ClickHouse/pull/56854) ([Antonio Andelic](https://github.com/antonio2368)).