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sidebar_position: 1
sidebar_label: 2023
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# 2023 Changelog

### ClickHouse release v23.3.2.37-lts (1b144bcd101) FIXME as compared to v23.3.1.2823-lts (46e85357ce2)

#### Improvement
* Backported in [#48459](https://github.com/ClickHouse/ClickHouse/issues/48459): Formatter '%M' in function formatDateTime() now prints the month name instead of the minutes. This makes the behavior consistent with MySQL. The previous behavior can be restored using setting "formatdatetime_parsedatetime_m_is_month_name = 0". [#47246](https://github.com/ClickHouse/ClickHouse/pull/47246) ([Robert Schulze](https://github.com/rschu1ze)).
* Backported in [#48842](https://github.com/ClickHouse/ClickHouse/issues/48842): Fix some mysql related settings not being handled with mysql dictionary source + named collection. Closes [#48402](https://github.com/ClickHouse/ClickHouse/issues/48402). [#48759](https://github.com/ClickHouse/ClickHouse/pull/48759) ([Kseniia Sumarokova](https://github.com/kssenii)).
* Backported in [#49035](https://github.com/ClickHouse/ClickHouse/issues/49035): Add fallback to password authentication when authentication with SSL user certificate has failed. Closes [#48974](https://github.com/ClickHouse/ClickHouse/issues/48974). [#48989](https://github.com/ClickHouse/ClickHouse/pull/48989) ([Nikolay Degterinsky](https://github.com/evillique)).

#### Build/Testing/Packaging Improvement
* Backported in [#48589](https://github.com/ClickHouse/ClickHouse/issues/48589): Update time zones. The following were updated: Africa/Cairo, Africa/Casablanca, Africa/El_Aaiun, America/Bogota, America/Cambridge_Bay, America/Ciudad_Juarez, America/Godthab, America/Inuvik, America/Iqaluit, America/Nuuk, America/Ojinaga, America/Pangnirtung, America/Rankin_Inlet, America/Resolute, America/Whitehorse, America/Yellowknife, Asia/Gaza, Asia/Hebron, Asia/Kuala_Lumpur, Asia/Singapore, Canada/Yukon, Egypt, Europe/Kirov, Europe/Volgograd, Singapore. [#48572](https://github.com/ClickHouse/ClickHouse/pull/48572) ([Alexey Milovidov](https://github.com/alexey-milovidov)).
* Backported in [#48960](https://github.com/ClickHouse/ClickHouse/issues/48960): After the recent update, the `dockerd` requires `--tlsverify=false` together with the http port explicitly. [#48924](https://github.com/ClickHouse/ClickHouse/pull/48924) ([Mikhail f. Shiryaev](https://github.com/Felixoid)).

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

* Remove a feature [#48195](https://github.com/ClickHouse/ClickHouse/pull/48195) ([Alexey Milovidov](https://github.com/alexey-milovidov)).
* Fix cpu usage in rabbitmq (was worsened in 23.2 after [#44404](https://github.com/ClickHouse/ClickHouse/issues/44404)) [#48311](https://github.com/ClickHouse/ClickHouse/pull/48311) ([Kseniia Sumarokova](https://github.com/kssenii)).
* Fix ThreadPool for DistributedSink and use StrongTypedef for CurrentMetrics/ProfileEvents/StatusInfo to avoid further errors [#48314](https://github.com/ClickHouse/ClickHouse/pull/48314) ([Azat Khuzhin](https://github.com/azat)).
* Reset downloader for cache file segment in TemporaryFileStream [#48386](https://github.com/ClickHouse/ClickHouse/pull/48386) ([Vladimir C](https://github.com/vdimir)).
* ClickHouse startup error when loading a distributed table that depends on a dictionary [#48419](https://github.com/ClickHouse/ClickHouse/pull/48419) ([MikhailBurdukov](https://github.com/MikhailBurdukov)).
* Fix possible segfault in cache [#48469](https://github.com/ClickHouse/ClickHouse/pull/48469) ([Kseniia Sumarokova](https://github.com/kssenii)).
* Fix nested map for keys of IP and UUID types [#48556](https://github.com/ClickHouse/ClickHouse/pull/48556) ([Yakov Olkhovskiy](https://github.com/yakov-olkhovskiy)).
* Fix bug in Keeper when a node is not created with scheme `auth` in ACL sometimes. [#48595](https://github.com/ClickHouse/ClickHouse/pull/48595) ([Aleksei Filatov](https://github.com/aalexfvk)).
* Fix IPv4 comparable with UInt [#48611](https://github.com/ClickHouse/ClickHouse/pull/48611) ([Yakov Olkhovskiy](https://github.com/yakov-olkhovskiy)).

#### NOT FOR CHANGELOG / INSIGNIFICANT

* Batch fix for projections analysis with analyzer. [#48357](https://github.com/ClickHouse/ClickHouse/pull/48357) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
* Fix a confusing warning about interserver mode [#48793](https://github.com/ClickHouse/ClickHouse/pull/48793) ([Alexander Tokmakov](https://github.com/tavplubix)).