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* Fix queries with `max_bytes_before_external_group_by`. [#10302](https://github.com/ClickHouse/ClickHouse/pull/10302) ([Artem Zuikov](https://github.com/4ertus2))
* Fix the issue with limiting maximum recursion depth in parser in certain cases. This fixes [#10283](https://github.com/ClickHouse/ClickHouse/issues/10283) This fix may introduce minor incompatibility: long and deep queries via clickhouse-client may refuse to work, and you should adjust settings `max_query_size` and `max_parser_depth` accordingly. [#10295](https://github.com/ClickHouse/ClickHouse/pull/10295) ([alexey-milovidov](https://github.com/alexey-milovidov))
* Allow to use `count(*)` with multiple JOINs. Fixes [#9853](https://github.com/ClickHouse/ClickHouse/issues/9853) [#10291](https://github.com/ClickHouse/ClickHouse/pull/10291) ([Artem Zuikov](https://github.com/4ertus2))
* Remove converting ColumnFixedString to FixedString in MsgPack format and add performance test. [#10216](https://github.com/ClickHouse/ClickHouse/pull/10216) ([Kruglov Pavel](https://github.com/Avogar))
* Fix error `Pipeline stuck` with `max_rows_to_group_by` and `group_by_overflow_mode = 'break'`. [#10279](https://github.com/ClickHouse/ClickHouse/pull/10279) ([Nikolai Kochetov](https://github.com/KochetovNicolai))
* Fix 'Cannot add column' error while creating `range_hashed` dictionary using DDL query. Fixes [#10093](https://github.com/ClickHouse/ClickHouse/issues/10093). [#10235](https://github.com/ClickHouse/ClickHouse/pull/10235) ([alesapin](https://github.com/alesapin))
* Fix rare possible exception `Cannot drain connections: cancel first`. [#10239](https://github.com/ClickHouse/ClickHouse/pull/10239) ([Nikolai Kochetov](https://github.com/KochetovNicolai))
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* Use background thread pool for background buffer flushes. [#10315](https://github.com/ClickHouse/ClickHouse/pull/10315) ([Azat Khuzhin](https://github.com/azat))
* Support for one special case of removing incompletely written parts. This fixes [#9940](https://github.com/ClickHouse/ClickHouse/issues/9940). [#10221](https://github.com/ClickHouse/ClickHouse/pull/10221) ([alexey-milovidov](https://github.com/alexey-milovidov))
* Use isInjective() over manual list of such functions for GROUP BY optimization. [#10342](https://github.com/ClickHouse/ClickHouse/pull/10342) ([Azat Khuzhin](https://github.com/azat))
* Improve MsgPack input format by adding msgpack::visitor concept instead of msgpack::unpack concept. [#10325](https://github.com/ClickHouse/ClickHouse/pull/10325) ([Kruglov Pavel](https://github.com/Avogar))
* Avoid printing error message in log if client sends RST packet immediately on connect. It is typical behaviour of IPVS balancer with keepalived and VRRP. This fixes [#1851](https://github.com/ClickHouse/ClickHouse/issues/1851) [#10274](https://github.com/ClickHouse/ClickHouse/pull/10274) ([alexey-milovidov](https://github.com/alexey-milovidov))
* Allow to parse `+inf` for floating point types. This closes [#1839](https://github.com/ClickHouse/ClickHouse/issues/1839) [#10272](https://github.com/ClickHouse/ClickHouse/pull/10272) ([alexey-milovidov](https://github.com/alexey-milovidov))
* Implemented `generateRandom` table function for Nested types. This closes [#9903](https://github.com/ClickHouse/ClickHouse/issues/9903) [#10219](https://github.com/ClickHouse/ClickHouse/pull/10219) ([alexey-milovidov](https://github.com/alexey-milovidov))