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sidebar_position: 1
sidebar_label: 2024
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# 2024 Changelog

### ClickHouse release v24.8.4.13-lts (53195bc189b) FIXME as compared to v24.8.3.59-lts (e729b9fa40e)

#### Improvement
* Backported in [#68699](https://github.com/ClickHouse/ClickHouse/issues/68699): Delete old code of named collections from dictionaries and substitute it to the new, which allows to use DDL created named collections in dictionaries. Closes [#60936](https://github.com/ClickHouse/ClickHouse/issues/60936), closes [#36890](https://github.com/ClickHouse/ClickHouse/issues/36890). [#68412](https://github.com/ClickHouse/ClickHouse/pull/68412) ([Kseniia Sumarokova](https://github.com/kssenii)).

#### Bug Fix (user-visible misbehavior in an official stable release)
* Backported in [#69231](https://github.com/ClickHouse/ClickHouse/issues/69231): Fix parsing error when null should be inserted as default in some cases during JSON type parsing. [#68955](https://github.com/ClickHouse/ClickHouse/pull/68955) ([Kruglov Pavel](https://github.com/Avogar)).
* Backported in [#69251](https://github.com/ClickHouse/ClickHouse/issues/69251): `UNION` clause in subqueries wasn't handled correctly in queries with parallel replicas and lead to LOGICAL_ERROR `Duplicate announcement received for replica`. [#69146](https://github.com/ClickHouse/ClickHouse/pull/69146) ([Igor Nikonov](https://github.com/devcrafter)).

#### NOT FOR CHANGELOG / INSIGNIFICANT

* Backported in [#69189](https://github.com/ClickHouse/ClickHouse/issues/69189): Don't create Object type if use_json_alias_for_old_object_type=1 but allow_experimental_object_type=0. [#69150](https://github.com/ClickHouse/ClickHouse/pull/69150) ([Kruglov Pavel](https://github.com/Avogar)).
* Backported in [#69229](https://github.com/ClickHouse/ClickHouse/issues/69229): Disable memory test with sanitizer. [#69193](https://github.com/ClickHouse/ClickHouse/pull/69193) ([alesapin](https://github.com/alesapin)).
* Backported in [#69219](https://github.com/ClickHouse/ClickHouse/issues/69219): Disable perf-like test with sanitizers. [#69194](https://github.com/ClickHouse/ClickHouse/pull/69194) ([alesapin](https://github.com/alesapin)).

