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sidebar_position: 1
sidebar_label: 2023
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# 2023 Changelog

### ClickHouse release v23.1.2.9-stable (8dfb1700858) FIXME as compared to v23.1.1.3077-stable (dcaac477025)

#### Performance Improvement
* Backported in [#45705](https://github.com/ClickHouse/ClickHouse/issues/45705): Fixed performance of short `SELECT` queries that read from tables with large number of`Array`/`Map`/`Nested` columns. [#45630](https://github.com/ClickHouse/ClickHouse/pull/45630) ([Anton Popov](https://github.com/CurtizJ)).

#### Bug Fix
* Backported in [#45673](https://github.com/ClickHouse/ClickHouse/issues/45673): Fix wiping sensitive info in logs. [#45603](https://github.com/ClickHouse/ClickHouse/pull/45603) ([Vitaly Baranov](https://github.com/vitlibar)).

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

* Backported in [#45730](https://github.com/ClickHouse/ClickHouse/issues/45730): Fix key description when encountering duplicate primary keys. This can happen in projections. See [#45590](https://github.com/ClickHouse/ClickHouse/issues/45590) for details. [#45686](https://github.com/ClickHouse/ClickHouse/pull/45686) ([Amos Bird](https://github.com/amosbird)).

#### NOT FOR CHANGELOG / INSIGNIFICANT

* Trim refs/tags/ from GITHUB_TAG in release workflow [#45636](https://github.com/ClickHouse/ClickHouse/pull/45636) ([Mikhail f. Shiryaev](https://github.com/Felixoid)).