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sidebar_position: 1
sidebar_label: 2023
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# 2023 Changelog

### ClickHouse release v23.1.7.30-stable (c94dba6e023) FIXME as compared to v23.1.6.42-stable (783ddf67991)

#### Improvement
* Backported in [#48161](https://github.com/ClickHouse/ClickHouse/issues/48161): Fixed `UNKNOWN_TABLE` exception when attaching to a materialized view that has dependent tables that are not available. This might be useful when trying to restore state from a backup. [#47975](https://github.com/ClickHouse/ClickHouse/pull/47975) ([MikhailBurdukov](https://github.com/MikhailBurdukov)).

#### Build/Testing/Packaging Improvement
* Backported in [#48585](https://github.com/ClickHouse/ClickHouse/issues/48585): 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 [#48958](https://github.com/ClickHouse/ClickHouse/issues/48958): 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)

* Fix race in grace hash join with limit [#47153](https://github.com/ClickHouse/ClickHouse/pull/47153) ([Vladimir C](https://github.com/vdimir)).
* Fix explain graph with projection [#47473](https://github.com/ClickHouse/ClickHouse/pull/47473) ([flynn](https://github.com/ucasfl)).
* Fix crash in polygonsSymDifferenceCartesian [#47702](https://github.com/ClickHouse/ClickHouse/pull/47702) ([pufit](https://github.com/pufit)).
* Remove a feature [#48195](https://github.com/ClickHouse/ClickHouse/pull/48195) ([Alexey Milovidov](https://github.com/alexey-milovidov)).
* 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)).