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ClickHouse/docs/changelogs/v20.7.2.30-stable.md

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### ClickHouse release v20.7.2.30-stable FIXME as compared to v20.7.1.4310-prestable
#### Performance Improvement
* Backported in [#14188](https://github.com/ClickHouse/ClickHouse/issues/14188): Slightly optimize very short queries with LowCardinality. [#14129](https://github.com/ClickHouse/ClickHouse/pull/14129) ([Anton Popov](https://github.com/CurtizJ)).
#### Improvement
* Backported in [#13918](https://github.com/ClickHouse/ClickHouse/issues/13918): Fix data race in `lgamma` function. This race was caught only in `tsan`, no side effects a really happened. [#13842](https://github.com/ClickHouse/ClickHouse/pull/13842) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
* Backported in [#13951](https://github.com/ClickHouse/ClickHouse/issues/13951): Fix wrong error for long queries. It was possible to get syntax error other than `Max query size exceeded` for correct query. [#13928](https://github.com/ClickHouse/ClickHouse/pull/13928) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
#### Bug Fix
* Backported in [#14088](https://github.com/ClickHouse/ClickHouse/issues/14088): Removed wrong auth access check when using ClickHouseDictionarySource to query remote tables. [#12756](https://github.com/ClickHouse/ClickHouse/pull/12756) ([sundyli](https://github.com/sundy-li)).
* Backported in [#13559](https://github.com/ClickHouse/ClickHouse/issues/13559): Fix access to redis dictionary after connection was dropped once. It may happen with `cache` and `direct` dictionary layouts. [#13082](https://github.com/ClickHouse/ClickHouse/pull/13082) ([Anton Popov](https://github.com/CurtizJ)).
* Backported in [#13509](https://github.com/ClickHouse/ClickHouse/issues/13509): Fix parsing row policies from users.xml when names of databases or tables contain dots. This fixes [#5779](https://github.com/ClickHouse/ClickHouse/issues/5779), [#12527](https://github.com/ClickHouse/ClickHouse/issues/12527). [#13199](https://github.com/ClickHouse/ClickHouse/pull/13199) ([Vitaly Baranov](https://github.com/vitlibar)).
* Backported in [#13607](https://github.com/ClickHouse/ClickHouse/issues/13607): Fix missing or excessive headers in `TSV/CSVWithNames` formats. This fixes [#12504](https://github.com/ClickHouse/ClickHouse/issues/12504). [#13343](https://github.com/ClickHouse/ClickHouse/pull/13343) ([Azat Khuzhin](https://github.com/azat)).
* Backported in [#13525](https://github.com/ClickHouse/ClickHouse/issues/13525): Fix possible race in `StorageMemory`. https://clickhouse-test-reports.s3.yandex.net/0/9cac8a7244063d2092ad25d45502611e18d3749c/stress_test_(thread)/stderr.log Have no idea how to write a test. [#13416](https://github.com/ClickHouse/ClickHouse/pull/13416) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
* Backported in [#13536](https://github.com/ClickHouse/ClickHouse/issues/13536): Fix wrong code in function `netloc`. This fixes [#13335](https://github.com/ClickHouse/ClickHouse/issues/13335). [#13446](https://github.com/ClickHouse/ClickHouse/pull/13446) ([Alexey Milovidov](https://github.com/alexey-milovidov)).
* Backported in [#14015](https://github.com/ClickHouse/ClickHouse/issues/14015): Fix premature `ON CLUSTER` timeouts for queries that must be executed on a single replica. Fixes [#6704](https://github.com/ClickHouse/ClickHouse/issues/6704), Fixes [#7228](https://github.com/ClickHouse/ClickHouse/issues/7228), Fixes [#13361](https://github.com/ClickHouse/ClickHouse/issues/13361), Fixes [#11884](https://github.com/ClickHouse/ClickHouse/issues/11884). [#13450](https://github.com/ClickHouse/ClickHouse/pull/13450) ([alesapin](https://github.com/alesapin)).
* Backported in [#13551](https://github.com/ClickHouse/ClickHouse/issues/13551): Fix secondary indices corruption in compact parts. [#13538](https://github.com/ClickHouse/ClickHouse/pull/13538) ([Anton Popov](https://github.com/CurtizJ)).
* Backported in [#13998](https://github.com/ClickHouse/ClickHouse/issues/13998): Fixed the behaviour when sometimes cache-dictionary returned default value instead of present value from source. [#13624](https://github.com/ClickHouse/ClickHouse/pull/13624) ([Nikita Mikhaylov](https://github.com/nikitamikhaylov)).
* Backported in [#13664](https://github.com/ClickHouse/ClickHouse/issues/13664): Concurrent `ALTER ... REPLACE/MOVE PARTITION ...` queries might cause deadlock. It's fixed. [#13626](https://github.com/ClickHouse/ClickHouse/pull/13626) ([Alexander Tokmakov](https://github.com/tavplubix)).
* Backported in [#13704](https://github.com/ClickHouse/ClickHouse/issues/13704): Fix typo in error message about `The value of 'number_of_free_entries_in_pool_to_lower_max_size_of_merge' setting`. [#13678](https://github.com/ClickHouse/ClickHouse/pull/13678) ([Alexey Milovidov](https://github.com/alexey-milovidov)).
* Backported in [#13718](https://github.com/ClickHouse/ClickHouse/issues/13718): Fix crash in JOIN with StorageMerge and `set enable_optimize_predicate_expression=1`. [#13679](https://github.com/ClickHouse/ClickHouse/pull/13679) ([Artem Zuikov](https://github.com/4ertus2)).
* Backported in [#13702](https://github.com/ClickHouse/ClickHouse/issues/13702): Do not optimize any(arrayJoin()) -> arrayJoin() under optimize_move_functions_out_of_any. [#13681](https://github.com/ClickHouse/ClickHouse/pull/13681) ([Azat Khuzhin](https://github.com/azat)).
* Backported in [#14107](https://github.com/ClickHouse/ClickHouse/issues/14107): Fix visible data clobbering by progress bar in client in interactive mode. This fixes [#12562](https://github.com/ClickHouse/ClickHouse/issues/12562) and [#13369](https://github.com/ClickHouse/ClickHouse/issues/13369) and [#13584](https://github.com/ClickHouse/ClickHouse/issues/13584) and fixes [#12964](https://github.com/ClickHouse/ClickHouse/issues/12964). [#13691](https://github.com/ClickHouse/ClickHouse/pull/13691) ([Alexey Milovidov](https://github.com/alexey-milovidov)).
* Backported in [#13734](https://github.com/ClickHouse/ClickHouse/issues/13734): Fix incorrect message in `clickhouse-server.init` while checking user and group. [#13711](https://github.com/ClickHouse/ClickHouse/pull/13711) ([ylchou](https://github.com/ylchou)).
* Backported in [#13773](https://github.com/ClickHouse/ClickHouse/issues/13773): Fix logging Settings.Names/Values when log_queries_min_type > QUERY_START. [#13737](https://github.com/ClickHouse/ClickHouse/pull/13737) ([Azat Khuzhin](https://github.com/azat)).
* Backported in [#13771](https://github.com/ClickHouse/ClickHouse/issues/13771): Fix race condition between DETACH and background merges. Parts may revive after detach. This is continuation of [#8602](https://github.com/ClickHouse/ClickHouse/issues/8602) that did not fix the issue but introduced a test that started to fail in very rare cases, demonstrating the issue. [#13746](https://github.com/ClickHouse/ClickHouse/pull/13746) ([Alexey Milovidov](https://github.com/alexey-milovidov)).
* Backported in [#13787](https://github.com/ClickHouse/ClickHouse/issues/13787): Add range check for h3KRing function. This fixes [#13633](https://github.com/ClickHouse/ClickHouse/issues/13633). [#13752](https://github.com/ClickHouse/ClickHouse/pull/13752) ([Alexey Milovidov](https://github.com/alexey-milovidov)).
* Backported in [#13886](https://github.com/ClickHouse/ClickHouse/issues/13886): Fixed `Directory not empty` error when concurrently executing `DROP DATABASE` and `CREATE TABLE`. [#13756](https://github.com/ClickHouse/ClickHouse/pull/13756) ([Alexey Milovidov](https://github.com/alexey-milovidov)).
* Backported in [#13800](https://github.com/ClickHouse/ClickHouse/issues/13800): Fix step overflow in range(). [#13790](https://github.com/ClickHouse/ClickHouse/pull/13790) ([Azat Khuzhin](https://github.com/azat)).
* Backported in [#13813](https://github.com/ClickHouse/ClickHouse/issues/13813): Fix reading from MergeTree table with INDEX of type SET fails when comparing against NULL. This fixes [#13686](https://github.com/ClickHouse/ClickHouse/issues/13686). [#13793](https://github.com/ClickHouse/ClickHouse/pull/13793) ([Amos Bird](https://github.com/amosbird)).
* Backported in [#13834](https://github.com/ClickHouse/ClickHouse/issues/13834): Fix topK/topKWeighted merge (with non-default parameters). [#13817](https://github.com/ClickHouse/ClickHouse/pull/13817) ([Azat Khuzhin](https://github.com/azat)).
* Backported in [#13904](https://github.com/ClickHouse/ClickHouse/issues/13904): Fix incorrect sorting for `FixedString` columns. Fixes [#13182](https://github.com/ClickHouse/ClickHouse/issues/13182). [#13887](https://github.com/ClickHouse/ClickHouse/pull/13887) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
* Backported in [#13977](https://github.com/ClickHouse/ClickHouse/issues/13977): Fixed potential deadlock when renaming `Distributed` table. [#13922](https://github.com/ClickHouse/ClickHouse/pull/13922) ([Alexander Tokmakov](https://github.com/tavplubix)).
* Backported in [#14031](https://github.com/ClickHouse/ClickHouse/issues/14031): Fix wrong results in select queries with `DISTINCT` keyword in case `optimize_duplicate_order_by_and_distinct` setting is enabled. [#13925](https://github.com/ClickHouse/ClickHouse/pull/13925) ([Artem Zuikov](https://github.com/4ertus2)).
* Backported in [#14078](https://github.com/ClickHouse/ClickHouse/issues/14078): Fixed wrong mount point in extra info for `Poco::Exception: no space left on device`. [#14050](https://github.com/ClickHouse/ClickHouse/pull/14050) ([Alexander Tokmakov](https://github.com/tavplubix)).
* Backported in [#14184](https://github.com/ClickHouse/ClickHouse/issues/14184): When waiting for a dictionary update to complete, use the timeout specified by `query_wait_timeout_milliseconds` setting instead of a hard-coded value. [#14105](https://github.com/ClickHouse/ClickHouse/pull/14105) ([Nikita Mikhaylov](https://github.com/nikitamikhaylov)).
* Backported in [#14169](https://github.com/ClickHouse/ClickHouse/issues/14169): Fix creation of tables with named tuples. This fixes [#13027](https://github.com/ClickHouse/ClickHouse/issues/13027). [#14143](https://github.com/ClickHouse/ClickHouse/pull/14143) ([Alexey Milovidov](https://github.com/alexey-milovidov)).
* Backported in [#14245](https://github.com/ClickHouse/ClickHouse/issues/14245): Fixed incorrect sorting order if LowCardinality column. This fixes [#13958](https://github.com/ClickHouse/ClickHouse/issues/13958). [#14223](https://github.com/ClickHouse/ClickHouse/pull/14223) ([Nikita Mikhaylov](https://github.com/nikitamikhaylov)).
* Backported in [#14250](https://github.com/ClickHouse/ClickHouse/issues/14250): Fix crash in mark inclusion search introduced in https://github.com/ClickHouse/ClickHouse/pull/12277 . [#14225](https://github.com/ClickHouse/ClickHouse/pull/14225) ([Amos Bird](https://github.com/amosbird)).
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