Merge pull request #12104 from ClickHouse/aku/changelog-20.5

Changelog for 20.5
2024-11-10 01:25:21 +00:00 · 2020-07-06 00:04:50 +03:00 · 2020-07-06 00:04:50 +03:00 · 5d2013f224
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+## ClickHouse release 20.5
+
+### ClickHouse release v20.5.2.7-stable 2020-07-02
+
+#### Backward Incompatible Change
+
+* Return non-Nullable result from COUNT(DISTINCT), and `uniq` aggregate functions family. If all passed values are NULL, return zero instead. This improves SQL compatibility. [#11661](https://github.com/ClickHouse/ClickHouse/pull/11661) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Added a check for the case when user-level setting is specified in a wrong place. User-level settings should be specified in `users.xml` inside `<profile>` section for specific user profile (or in `<default>` for default settings). The server won't start with exception message in log. This fixes [#9051](https://github.com/ClickHouse/ClickHouse/issues/9051). If you want to skip the check, you can either move settings to the appropriate place or add `<skip_check_for_incorrect_settings>1</skip_check_for_incorrect_settings>` to config.xml. [#11449](https://github.com/ClickHouse/ClickHouse/pull/11449) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* The setting `input_format_with_names_use_header` is enabled by default. It will affect parsing of input formats `-WithNames` and `-WithNamesAndTypes`. [#10937](https://github.com/ClickHouse/ClickHouse/pull/10937) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Remove `experimental_use_processors` setting. It is enabled by default. [#10924](https://github.com/ClickHouse/ClickHouse/pull/10924) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+
+#### New Feature
+
+* Added support for MySQL style global variables syntax (stub). This is needed for compatibility of MySQL protocol. [#11832](https://github.com/ClickHouse/ClickHouse/pull/11832) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* `minMap` and `maxMap` functions were added. [#11603](https://github.com/ClickHouse/ClickHouse/pull/11603) ([Ildus Kurbangaliev](https://github.com/ildus)).
+* Add the `system.asynchronous_metric_log` table that logs historical metrics from `system.asynchronous_metrics`. [#11588](https://github.com/ClickHouse/ClickHouse/pull/11588) ([Alexander Kuzmenkov](https://github.com/akuzm)).
+* Add functions `extractAllGroupsHorizontal(haystack, re)` and `extractAllGroupsVertical(haystack, re)`. [#11554](https://github.com/ClickHouse/ClickHouse/pull/11554) ([Vasily Nemkov](https://github.com/Enmk)).
+* Add SHOW CLUSTER(S) queries. [#11467](https://github.com/ClickHouse/ClickHouse/pull/11467) ([hexiaoting](https://github.com/hexiaoting)).
+* Add `netloc` function for extracting network location, similar to `urlparse(url)`, `netloc` in python. [#11356](https://github.com/ClickHouse/ClickHouse/pull/11356) ([Guillaume Tassery](https://github.com/YiuRULE)).
+* Add 2 more virtual columns for engine=Kafka to access message headers. [#11283](https://github.com/ClickHouse/ClickHouse/pull/11283) ([filimonov](https://github.com/filimonov)).
+* Add `_timestamp_ms` virtual column for Kafka engine (type is `Nullable(DateTime64(3))`). [#11260](https://github.com/ClickHouse/ClickHouse/pull/11260) ([filimonov](https://github.com/filimonov)).
+* Add function `fuzzBits` that randomly flips bits in a string with given probability. [#11237](https://github.com/ClickHouse/ClickHouse/pull/11237) ([Andrei Nekrashevich](https://github.com/xolm)).
+* Use HTTP client for S3 based on Poco. [#11230](https://github.com/ClickHouse/ClickHouse/pull/11230) ([Pavel Kovalenko](https://github.com/Jokser)).
+* Add query performance metrics based on Linux `perf_events`. [#9545](https://github.com/ClickHouse/ClickHouse/pull/9545) [Andrey Skobtsov](https://github.com/And42). [#11226](https://github.com/ClickHouse/ClickHouse/pull/11226) ([Alexander Kuzmenkov](https://github.com/akuzm)).
+* Default S3 credentials and custom auth headers. [#11134](https://github.com/ClickHouse/ClickHouse/pull/11134) ([Grigory Pervakov](https://github.com/GrigoryPervakov)).
+* Add's a hasSubStr function that allows for look for sub sequences in arrays. [#11071](https://github.com/ClickHouse/ClickHouse/pull/11071) ([Ryad Zenine](https://github.com/r-zenine)).
+* Now support NULL and NOT NULL modifiers for data types in create query. [#11057](https://github.com/ClickHouse/ClickHouse/pull/11057) ([Павел Потемкин](https://github.com/Potya)).
+* Added new functions to import/export DateTime64 as Int64 with various precision: `to-/fromUnixTimestamp64Milli/-Micro/-Nano`. [#10923](https://github.com/ClickHouse/ClickHouse/pull/10923) ([Vasily Nemkov](https://github.com/Enmk)).
+* Allow specifying `mongodb://` URI for MongoDB dictionaries. [#10915](https://github.com/ClickHouse/ClickHouse/pull/10915) ([Alexander Kuzmenkov](https://github.com/akuzm)).
+* Support writes in ODBC Table function [#10554](https://github.com/ClickHouse/ClickHouse/pull/10554) ([ageraab](https://github.com/ageraab)). [#10901](https://github.com/ClickHouse/ClickHouse/pull/10901) ([tavplubix](https://github.com/tavplubix)).
+* Support `ALTER RENAME COLUMN` for the distributed table engine. Continuation of [#10727](https://github.com/ClickHouse/ClickHouse/issues/10727). Fixes [#10747](https://github.com/ClickHouse/ClickHouse/issues/10747). [#10887](https://github.com/ClickHouse/ClickHouse/pull/10887) ([alesapin](https://github.com/alesapin)).
+* Added new complex key direct layout to dictionaries, that does not store anything locally during query execution. [#10850](https://github.com/ClickHouse/ClickHouse/pull/10850) ([Artem Streltsov](https://github.com/kekekekule)).
+* OFFSET keyword can now be used without an affiliated LIMIT clause. [#10802](https://github.com/ClickHouse/ClickHouse/pull/10802) ([Guillaume Tassery](https://github.com/YiuRULE)).
+* Added `system.licenses` table. This table contains licenses of third-party libraries that are located in `contrib` directory. This closes [#2890](https://github.com/ClickHouse/ClickHouse/issues/2890). [#10795](https://github.com/ClickHouse/ClickHouse/pull/10795) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* New function function toStartOfSecond(DateTime64) -> DateTime64 that nullifies sub-second part of DateTime64 value. [#10722](https://github.com/ClickHouse/ClickHouse/pull/10722) ([Vasily Nemkov](https://github.com/Enmk)).
+* Add data type Point (Tuple(Float64, Float64)) and Polygon (Array(Array(Tuple(Float64, Float64))). [#10678](https://github.com/ClickHouse/ClickHouse/pull/10678) ([Alexey Ilyukhov](https://github.com/livace)).
+* Default user and database creation on docker image starting. [#10637](https://github.com/ClickHouse/ClickHouse/pull/10637) ([Paramtamtam](https://github.com/tarampampam)).
+* Added a new layout ```direct``` which loads all the data directly from the source for each query, without storing or caching data. [#10622](https://github.com/ClickHouse/ClickHouse/pull/10622) ([Artem Streltsov](https://github.com/kekekekule)).
+* Add new input format `JSONAsString` that accepts a sequence of JSON objects separated by newlines, spaces and/or commas. [#10607](https://github.com/ClickHouse/ClickHouse/pull/10607) ([Kruglov Pavel](https://github.com/Avogar)).
+* Allowed to profile memory with finer granularity steps than 4 MiB. Added sampling memory profiler to capture random allocations/deallocations. [#10598](https://github.com/ClickHouse/ClickHouse/pull/10598) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* (Only Linux) Clickhouse server now tries to fallback to ProcfsMetricsProvider when clickhouse binary is not attributed with CAP_NET_ADMIN capability to collect per-query system metrics (for CPU and I/O). [#10544](https://github.com/ClickHouse/ClickHouse/pull/10544) ([Alexander Kazakov](https://github.com/Akazz)).
+* Added ability to delete a subset of expired rows, which satisfies the condition in WHERE clause. Added ability to replace expired rows with aggregates of them specified in GROUP BY clause. [#10537](https://github.com/ClickHouse/ClickHouse/pull/10537) ([expl0si0nn](https://github.com/expl0si0nn)).
+* Function that extracts from haystack all matching non-overlapping groups with regular expressions, and put those into `Array(Array(String))` column. [#10534](https://github.com/ClickHouse/ClickHouse/pull/10534) ([Vasily Nemkov](https://github.com/Enmk)).
+* Selects with final are executed in parallel. Added setting `max_final_threads` to limit the number of threads used. [#10463](https://github.com/ClickHouse/ClickHouse/pull/10463) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Implementation of PostgreSQL wire protocol. [#10242](https://github.com/ClickHouse/ClickHouse/pull/10242) ([Movses](https://github.com/MovElb)).
+* Added OpenCl support and bitonic sort algorithm, which can be used for sorting integer types of data in single column. Needs to be build with flag `-DENABLE_OPENCL=1`. For using bitonic sort algorithm instead of others you need to set `bitonic_sort` for Setting's option `special_sort` and make sure that OpenCL is available. [#10232](https://github.com/ClickHouse/ClickHouse/pull/10232) ([Ri](https://github.com/margaritiko)).
+* `SimpleAggregateFunction` now also supports `sumMap`. [#10000](https://github.com/ClickHouse/ClickHouse/pull/10000) ([Ildus Kurbangaliev](https://github.com/ildus)).
+
+#### Bug Fix
+
+* Fix potential floating point exception when parsing DateTime64. This fixes [#11374](https://github.com/ClickHouse/ClickHouse/issues/11374). [#11875](https://github.com/ClickHouse/ClickHouse/pull/11875) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix rare crash caused by using `Nullable` column in prewhere condition. [#11895](https://github.com/ClickHouse/ClickHouse/pull/11895) [#11608](https://github.com/ClickHouse/ClickHouse/issues/11608) [#11869](https://github.com/ClickHouse/ClickHouse/pull/11869) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Don't allow arrayJoin inside higher order functions. It was leading to broken protocol synchronization. This closes [#3933](https://github.com/ClickHouse/ClickHouse/issues/3933). [#11846](https://github.com/ClickHouse/ClickHouse/pull/11846) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix wrong result of comparison of FixedString with constant String. This fixes [#11393](https://github.com/ClickHouse/ClickHouse/issues/11393). This bug appeared in version 20.4. [#11828](https://github.com/ClickHouse/ClickHouse/pull/11828) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix wrong result for `if()` with NULLs in condition. [#11807](https://github.com/ClickHouse/ClickHouse/pull/11807) ([Artem Zuikov](https://github.com/4ertus2)).
+* Preserve column alias with optimize_aggregators_of_group_by_keys (`optimize_aggregators_of_group_by_keys` has been introduced in [#11667](https://github.com/ClickHouse/ClickHouse/issues/11667)). [#11806](https://github.com/ClickHouse/ClickHouse/pull/11806) ([Azat Khuzhin](https://github.com/azat)).
+* Fix using too many threads for queries. [#11788](https://github.com/ClickHouse/ClickHouse/pull/11788) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Fixed `Scalar doesn't exist` exception when using `WITH <scalar subquery> ...` in `SELECT ... FROM merge_tree_table ...` https://github.com/ClickHouse/ClickHouse/issues/11621. [#11767](https://github.com/ClickHouse/ClickHouse/pull/11767) ([Amos Bird](https://github.com/amosbird)).
+* Fixes crash in special generated queries when `optimize_arithmetic_operations_in_aggregate_functions = 1`. [#11756](https://github.com/ClickHouse/ClickHouse/pull/11756) ([Ruslan](https://github.com/kamalov-ruslan)).
+* Fix unexpected behaviour of queries like `SELECT *, xyz.*` which were success while an error expected. [#11753](https://github.com/ClickHouse/ClickHouse/pull/11753) ([hexiaoting](https://github.com/hexiaoting)).
+* Now replicated fetches will be cancelled during metadata alter. [#11744](https://github.com/ClickHouse/ClickHouse/pull/11744) ([alesapin](https://github.com/alesapin)).
+* Parse metadata stored in zookeeper before checking for equality. [#11739](https://github.com/ClickHouse/ClickHouse/pull/11739) ([Azat Khuzhin](https://github.com/azat)).
+* Fixed LOGICAL_ERROR caused by wrong type deduction of complex literals in Values input format. [#11732](https://github.com/ClickHouse/ClickHouse/pull/11732) ([tavplubix](https://github.com/tavplubix)).
+* Fix `ORDER BY ... WITH FILL` over const columns. [#11697](https://github.com/ClickHouse/ClickHouse/pull/11697) ([Anton Popov](https://github.com/CurtizJ)).
+* Fix very rare race condition in SYSTEM SYNC REPLICA. If the replicated table is created and at the same time from the separate connection another client is issuing `SYSTEM SYNC REPLICA` command on that table (this is unlikely, because another client should be aware that the table is created), it's possible to get nullptr dereference. [#11691](https://github.com/ClickHouse/ClickHouse/pull/11691) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Pass proper timeouts when communicating with XDBC bridge. Recently timeouts were not respected when checking bridge liveness and receiving meta info. [#11690](https://github.com/ClickHouse/ClickHouse/pull/11690) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix `LIMIT n WITH TIES` usage together with `ORDER BY` statement, which contains aliases. [#11689](https://github.com/ClickHouse/ClickHouse/pull/11689) ([Anton Popov](https://github.com/CurtizJ)).
+* Fix possible `Pipeline stuck` for selects with parallel `FINAL`. Fixes [#11636](https://github.com/ClickHouse/ClickHouse/issues/11636). [#11682](https://github.com/ClickHouse/ClickHouse/pull/11682) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Fix error which leads to an incorrect state of `system.mutations`. It may show that whole mutation is already done but the server still has `MUTATE_PART` tasks in the replication queue and tries to execute them. This fixes [#11611](https://github.com/ClickHouse/ClickHouse/issues/11611). [#11681](https://github.com/ClickHouse/ClickHouse/pull/11681) ([alesapin](https://github.com/alesapin)).
+* Fix syntax hilite in CREATE USER query. [#11664](https://github.com/ClickHouse/ClickHouse/pull/11664) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Add support for regular expressions with case-insensitive flags. This fixes [#11101](https://github.com/ClickHouse/ClickHouse/issues/11101) and fixes [#11506](https://github.com/ClickHouse/ClickHouse/issues/11506). [#11649](https://github.com/ClickHouse/ClickHouse/pull/11649) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Remove trivial count query optimization if row-level security is set. In previous versions the user get total count of records in a table instead filtered. This fixes [#11352](https://github.com/ClickHouse/ClickHouse/issues/11352). [#11644](https://github.com/ClickHouse/ClickHouse/pull/11644) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix bloom filters for String (data skipping indices). [#11638](https://github.com/ClickHouse/ClickHouse/pull/11638) ([Azat Khuzhin](https://github.com/azat)).
+* without -q option the database does not get created at startup. [#11604](https://github.com/ClickHouse/ClickHouse/pull/11604) ([giordyb](https://github.com/giordyb)).
+* Fix error `Block structure mismatch` for queries with sampling reading from `Buffer` table. [#11602](https://github.com/ClickHouse/ClickHouse/pull/11602) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Fix wrong exit code of the clickhouse-client, when exception.code() % 256 = 0. [#11601](https://github.com/ClickHouse/ClickHouse/pull/11601) ([filimonov](https://github.com/filimonov)).
+* Fix race conditions in CREATE/DROP of different replicas of ReplicatedMergeTree. Continue to work if the table was not removed completely from ZooKeeper or not created successfully. This fixes [#11432](https://github.com/ClickHouse/ClickHouse/issues/11432). [#11592](https://github.com/ClickHouse/ClickHouse/pull/11592) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix trivial error in log message about "Mark cache size was lowered" at server startup. This closes [#11399](https://github.com/ClickHouse/ClickHouse/issues/11399). [#11589](https://github.com/ClickHouse/ClickHouse/pull/11589) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix error `Size of offsets doesn't match size of column` for queries with `PREWHERE column in (subquery)` and `ARRAY JOIN`. [#11580](https://github.com/ClickHouse/ClickHouse/pull/11580) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Fixed rare segfault in `SHOW CREATE TABLE` Fixes [#11490](https://github.com/ClickHouse/ClickHouse/issues/11490). [#11579](https://github.com/ClickHouse/ClickHouse/pull/11579) ([tavplubix](https://github.com/tavplubix)).
+* All queries in HTTP session have had the same query_id. It is fixed. [#11578](https://github.com/ClickHouse/ClickHouse/pull/11578) ([tavplubix](https://github.com/tavplubix)).
+* Now clickhouse-server docker container will prefer IPv6 checking server aliveness. [#11550](https://github.com/ClickHouse/ClickHouse/pull/11550) ([Ivan Starkov](https://github.com/istarkov)).
+* Fix the error `Data compressed with different methods` that can happen if `min_bytes_to_use_direct_io` is enabled and PREWHERE is active and using SAMPLE or high number of threads. This fixes [#11539](https://github.com/ClickHouse/ClickHouse/issues/11539). [#11540](https://github.com/ClickHouse/ClickHouse/pull/11540) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix shard_num/replica_num for `<node>` (breaks use_compact_format_in_distributed_parts_names). [#11528](https://github.com/ClickHouse/ClickHouse/pull/11528) ([Azat Khuzhin](https://github.com/azat)).
+* Fix async INSERT into Distributed for prefer_localhost_replica=0 and w/o internal_replication. [#11527](https://github.com/ClickHouse/ClickHouse/pull/11527) ([Azat Khuzhin](https://github.com/azat)).
+* Fix memory leak when exception is thrown in the middle of aggregation with -State functions. This fixes [#8995](https://github.com/ClickHouse/ClickHouse/issues/8995). [#11496](https://github.com/ClickHouse/ClickHouse/pull/11496) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix `Pipeline stuck` exception for `INSERT SELECT FINAL` where `SELECT` (`max_threads`>1) has multiple streams but `INSERT` has only one (`max_insert_threads`==0). [#11455](https://github.com/ClickHouse/ClickHouse/pull/11455) ([Azat Khuzhin](https://github.com/azat)).
+* Fix wrong result in queries like `select count() from t, u`. [#11454](https://github.com/ClickHouse/ClickHouse/pull/11454) ([Artem Zuikov](https://github.com/4ertus2)).
+* Fix return compressed size for codecs. [#11448](https://github.com/ClickHouse/ClickHouse/pull/11448) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Fix server crash when a column has compression codec with non-literal arguments. Fixes [#11365](https://github.com/ClickHouse/ClickHouse/issues/11365). [#11431](https://github.com/ClickHouse/ClickHouse/pull/11431) ([alesapin](https://github.com/alesapin)).
+* Fix pointInPolygon with nan as point. Fixes https://github.com/ClickHouse/ClickHouse/issues/11375. [#11421](https://github.com/ClickHouse/ClickHouse/pull/11421) ([Alexey Ilyukhov](https://github.com/livace)).
+* Fix potential uninitialized memory read in MergeTree shutdown if table was not created successfully. [#11420](https://github.com/ClickHouse/ClickHouse/pull/11420) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix crash in JOIN over LowCarinality(T) and Nullable(T). [#11380](https://github.com/ClickHouse/ClickHouse/issues/11380). [#11414](https://github.com/ClickHouse/ClickHouse/pull/11414) ([Artem Zuikov](https://github.com/4ertus2)).
+* Fix error code for wrong `USING` key. [#11373](https://github.com/ClickHouse/ClickHouse/issues/11373). [#11404](https://github.com/ClickHouse/ClickHouse/pull/11404) ([Artem Zuikov](https://github.com/4ertus2)).
+* Fixed geohashesInBox with arguments outside of latitude/longitude range. [#11403](https://github.com/ClickHouse/ClickHouse/pull/11403) ([Vasily Nemkov](https://github.com/Enmk)).
+* Better errors for `joinGet()` functions. [#11389](https://github.com/ClickHouse/ClickHouse/pull/11389) ([Artem Zuikov](https://github.com/4ertus2)).
+* Fix possible `Pipeline stuck` error for queries with external sort and limit. Fixes [#11359](https://github.com/ClickHouse/ClickHouse/issues/11359). [#11366](https://github.com/ClickHouse/ClickHouse/pull/11366) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Remove redundant lock during parts send in ReplicatedMergeTree. [#11354](https://github.com/ClickHouse/ClickHouse/pull/11354) ([alesapin](https://github.com/alesapin)).
+* Fix support for `\G` (vertical output) in clickhouse-client in multiline mode. This closes [#9933](https://github.com/ClickHouse/ClickHouse/issues/9933). [#11350](https://github.com/ClickHouse/ClickHouse/pull/11350) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix potential segfault when using `Lazy` database. [#11348](https://github.com/ClickHouse/ClickHouse/pull/11348) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix crash in direct selects from StorageJoin (without JOIN) and wrong nullability. [#11340](https://github.com/ClickHouse/ClickHouse/pull/11340) ([Artem Zuikov](https://github.com/4ertus2)).
+* Fix crash in `quantilesExactWeightedArray`. [#11337](https://github.com/ClickHouse/ClickHouse/pull/11337) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Now merges stopped before change metadata in `ALTER` queries. [#11335](https://github.com/ClickHouse/ClickHouse/pull/11335) ([alesapin](https://github.com/alesapin)).
+* Make writing to `MATERIALIZED VIEW` with setting `parallel_view_processing = 1` parallel again. Fixes [#10241](https://github.com/ClickHouse/ClickHouse/issues/10241). [#11330](https://github.com/ClickHouse/ClickHouse/pull/11330) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Fix visitParamExtractRaw when extracted JSON has strings with unbalanced { or [. [#11318](https://github.com/ClickHouse/ClickHouse/pull/11318) ([Ewout](https://github.com/devwout)).
+* Fix very rare race condition in ThreadPool. [#11314](https://github.com/ClickHouse/ClickHouse/pull/11314) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix insignificant data race in clickhouse-copier. Found by integration tests. [#11313](https://github.com/ClickHouse/ClickHouse/pull/11313) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix potential uninitialized memory in conversion. Example: `SELECT toIntervalSecond(now64())`. [#11311](https://github.com/ClickHouse/ClickHouse/pull/11311) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix the issue when index analysis cannot work if a table has Array column in primary key and if a query is filtering by this column with `empty` or `notEmpty` functions. This fixes [#11286](https://github.com/ClickHouse/ClickHouse/issues/11286). [#11303](https://github.com/ClickHouse/ClickHouse/pull/11303) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix bug when query speed estimation can be incorrect and the limit of `min_execution_speed` may not work or work incorrectly if the query is throttled by `max_network_bandwidth`, `max_execution_speed` or `priority` settings. Change the default value of `timeout_before_checking_execution_speed` to non-zero, because otherwise the settings `min_execution_speed` and `max_execution_speed` have no effect. This fixes [#11297](https://github.com/ClickHouse/ClickHouse/issues/11297). This fixes [#5732](https://github.com/ClickHouse/ClickHouse/issues/5732). This fixes [#6228](https://github.com/ClickHouse/ClickHouse/issues/6228). Usability improvement: avoid concatenation of exception message with progress bar in `clickhouse-client`. [#11296](https://github.com/ClickHouse/ClickHouse/pull/11296) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix crash when SET DEFAULT ROLE is called with wrong arguments. This fixes https://github.com/ClickHouse/ClickHouse/issues/10586. [#11278](https://github.com/ClickHouse/ClickHouse/pull/11278) ([Vitaly Baranov](https://github.com/vitlibar)).
+* Fix wrong markup in documentation. [#11263](https://github.com/ClickHouse/ClickHouse/pull/11263) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix crash while reading malformed data in Protobuf format. This fixes https://github.com/ClickHouse/ClickHouse/issues/5957, fixes https://github.com/ClickHouse/ClickHouse/issues/11203. [#11258](https://github.com/ClickHouse/ClickHouse/pull/11258) ([Vitaly Baranov](https://github.com/vitlibar)).
+* Fixed a bug when cache-dictionary could return default value instead of normal (when there are only expired keys). This affects only string fields. [#11233](https://github.com/ClickHouse/ClickHouse/pull/11233) ([Nikita Mikhaylov](https://github.com/nikitamikhaylov)).
+* Fix error `Block structure mismatch in QueryPipeline` while reading from `VIEW` with constants in inner query. Fixes [#11181](https://github.com/ClickHouse/ClickHouse/issues/11181). [#11205](https://github.com/ClickHouse/ClickHouse/pull/11205) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Fix possible exception `Invalid status for associated output`. [#11200](https://github.com/ClickHouse/ClickHouse/pull/11200) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Now `primary.idx` will be checked if it's defined in `CREATE` query. [#11199](https://github.com/ClickHouse/ClickHouse/pull/11199) ([alesapin](https://github.com/alesapin)).
+* Fix possible error `Cannot capture column` for higher-order functions with `Array(Array(LowCardinality))` captured argument. [#11185](https://github.com/ClickHouse/ClickHouse/pull/11185) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Fixed S3 globbing which could fail in case of more than 1000 keys and some backends. [#11179](https://github.com/ClickHouse/ClickHouse/pull/11179) ([Vladimir Chebotarev](https://github.com/excitoon)).
+* If data skipping index is dependent on columns that are going to be modified during background merge (for SummingMergeTree, AggregatingMergeTree as well as for TTL GROUP BY), it was calculated incorrectly. This issue is fixed by moving index calculation after merge so the index is calculated on merged data. [#11162](https://github.com/ClickHouse/ClickHouse/pull/11162) ([Azat Khuzhin](https://github.com/azat)).
+* Fix Kafka performance issue related to reschedules based on limits, which were always applied. [#11149](https://github.com/ClickHouse/ClickHouse/pull/11149) ([filimonov](https://github.com/filimonov)).
+* Fix for the hang which was happening sometimes during DROP of table engine=Kafka (or during server restarts). [#11145](https://github.com/ClickHouse/ClickHouse/pull/11145) ([filimonov](https://github.com/filimonov)).
+* Fix excessive reserving of threads for simple queries (optimization for reducing the number of threads, which was partly broken after changes in pipeline). [#11114](https://github.com/ClickHouse/ClickHouse/pull/11114) ([Azat Khuzhin](https://github.com/azat)).
+* Remove logging from mutation finalization task if nothing was finalized. [#11109](https://github.com/ClickHouse/ClickHouse/pull/11109) ([alesapin](https://github.com/alesapin)).
+* Fixed deadlock during server startup after update with changes in structure of system log tables. [#11106](https://github.com/ClickHouse/ClickHouse/pull/11106) ([alesapin](https://github.com/alesapin)).
+* Fixed memory leak in registerDiskS3. [#11074](https://github.com/ClickHouse/ClickHouse/pull/11074) ([Pavel Kovalenko](https://github.com/Jokser)).
+* Fix error `No such name in Block::erase()` when JOIN appears with PREWHERE or `optimize_move_to_prewhere` makes PREWHERE from WHERE. [#11051](https://github.com/ClickHouse/ClickHouse/pull/11051) ([Artem Zuikov](https://github.com/4ertus2)).
+* Fixes the potential missed data during termination of Kafka engine table. [#11048](https://github.com/ClickHouse/ClickHouse/pull/11048) ([filimonov](https://github.com/filimonov)).
+* Fixed parseDateTime64BestEffort argument resolution bugs. [#10925](https://github.com/ClickHouse/ClickHouse/issues/10925). [#11038](https://github.com/ClickHouse/ClickHouse/pull/11038) ([Vasily Nemkov](https://github.com/Enmk)).
+* Now it's possible to `ADD/DROP` and `RENAME` the same one column in a single `ALTER` query. Exception message for simultaneous `MODIFY` and `RENAME` became more clear. Partially fixes [#10669](https://github.com/ClickHouse/ClickHouse/issues/10669). [#11037](https://github.com/ClickHouse/ClickHouse/pull/11037) ([alesapin](https://github.com/alesapin)).
+* Fixed parsing of S3 URLs. [#11036](https://github.com/ClickHouse/ClickHouse/pull/11036) ([Vladimir Chebotarev](https://github.com/excitoon)).
+* Fix very rare potential use-after-free error in MergeTree if table was not created successfully. [#10986](https://github.com/ClickHouse/ClickHouse/pull/10986) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix metadata (relative path for rename) and data (relative path for symlink) handling for Atomic database. [#10980](https://github.com/ClickHouse/ClickHouse/pull/10980) ([Azat Khuzhin](https://github.com/azat)).
+* Fix server crash on concurrent `ALTER` and `DROP DATABASE` queries with `Atomic` database engine. [#10968](https://github.com/ClickHouse/ClickHouse/pull/10968) ([tavplubix](https://github.com/tavplubix)).
+* Fix incorrect raw data size in method getRawData(). [#10964](https://github.com/ClickHouse/ClickHouse/pull/10964) ([Igr](https://github.com/ObjatieGroba)).
+* Fix incompatibility of two-level aggregation between versions 20.1 and earlier. This incompatibility happens when different versions of ClickHouse are used on initiator node and remote nodes and the size of GROUP BY result is large and aggregation is performed by a single String field. It leads to several unmerged rows for a single key in result. [#10952](https://github.com/ClickHouse/ClickHouse/pull/10952) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Avoid sending partially written files by the DistributedBlockOutputStream. [#10940](https://github.com/ClickHouse/ClickHouse/pull/10940) ([Azat Khuzhin](https://github.com/azat)).
+* Fix crash in `SELECT count(notNullIn(NULL, []))`. [#10920](https://github.com/ClickHouse/ClickHouse/pull/10920) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Fix for the hang which was happening sometimes during DROP of table engine=Kafka (or during server restarts). [#10910](https://github.com/ClickHouse/ClickHouse/pull/10910) ([filimonov](https://github.com/filimonov)).
+* Now it's possible to execute multiple `ALTER RENAME` like `a TO b, c TO a`. [#10895](https://github.com/ClickHouse/ClickHouse/pull/10895) ([alesapin](https://github.com/alesapin)).
+* Fix possible race which could happen when you get result from aggregate function state from multiple thread for the same column. The only way (which I found) it can happen is when you use `finalizeAggregation` function while reading from table with `Memory` engine which stores `AggregateFunction` state for `quanite*` function. [#10890](https://github.com/ClickHouse/ClickHouse/pull/10890) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Fix backward compatibility with tuples in Distributed tables. [#10889](https://github.com/ClickHouse/ClickHouse/pull/10889) ([Anton Popov](https://github.com/CurtizJ)).
+* Fix SIGSEGV in StringHashTable (if such key does not exist). [#10870](https://github.com/ClickHouse/ClickHouse/pull/10870) ([Azat Khuzhin](https://github.com/azat)).
+* Fixed `WATCH` hangs after `LiveView` table was dropped from database with `Atomic` engine. [#10859](https://github.com/ClickHouse/ClickHouse/pull/10859) ([tavplubix](https://github.com/tavplubix)).
+* Fixed bug in `ReplicatedMergeTree` which might cause some `ALTER` on `OPTIMIZE` query to hang waiting for some replica after it become inactive. [#10849](https://github.com/ClickHouse/ClickHouse/pull/10849) ([tavplubix](https://github.com/tavplubix)).
+* Now constraints are updated if the column participating in `CONSTRAINT` expression was renamed. Fixes [#10844](https://github.com/ClickHouse/ClickHouse/issues/10844). [#10847](https://github.com/ClickHouse/ClickHouse/pull/10847) ([alesapin](https://github.com/alesapin)).
+* Fix potential read of uninitialized memory in cache dictionary. [#10834](https://github.com/ClickHouse/ClickHouse/pull/10834) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix columns order after Block::sortColumns() (also add a test that shows that it affects some real use case - Buffer engine). [#10826](https://github.com/ClickHouse/ClickHouse/pull/10826) ([Azat Khuzhin](https://github.com/azat)).
+* Fix the issue with ODBC bridge when no quoting of identifiers is requested. This fixes [#7984](https://github.com/ClickHouse/ClickHouse/issues/7984). [#10821](https://github.com/ClickHouse/ClickHouse/pull/10821) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix UBSan and MSan report in DateLUT. [#10798](https://github.com/ClickHouse/ClickHouse/pull/10798) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Make use of `src_type` for correct type conversion in key conditions. Fixes [#6287](https://github.com/ClickHouse/ClickHouse/issues/6287). [#10791](https://github.com/ClickHouse/ClickHouse/pull/10791) ([Andrew Onyshchuk](https://github.com/oandrew)).
+* Get rid of old libunwind patches. https://github.com/ClickHouse-Extras/libunwind/commit/500aa227911bd185a94bfc071d68f4d3b03cb3b1#r39048012 This allows to disable `-fno-omit-frame-pointer` in `clang` builds that improves performance at least by 1% in average. [#10761](https://github.com/ClickHouse/ClickHouse/pull/10761) ([Amos Bird](https://github.com/amosbird)).
+* Fix avgWeighted when using floating-point weight over multiple shards. [#10758](https://github.com/ClickHouse/ClickHouse/pull/10758) ([Baudouin Giard](https://github.com/bgiard)).
+* Fix `parallel_view_processing` behavior. Now all insertions into `MATERIALIZED VIEW` without exception should be finished if exception happened. Fixes [#10241](https://github.com/ClickHouse/ClickHouse/issues/10241). [#10757](https://github.com/ClickHouse/ClickHouse/pull/10757) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Fix combinator -OrNull and -OrDefault when combined with -State. [#10741](https://github.com/ClickHouse/ClickHouse/pull/10741) ([hcz](https://github.com/hczhcz)).
+* Fix crash in `generateRandom` with nested types. Fixes [#10583](https://github.com/ClickHouse/ClickHouse/issues/10583). [#10734](https://github.com/ClickHouse/ClickHouse/pull/10734) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Fix data corruption for `LowCardinality(FixedString)` key column in `SummingMergeTree` which could have happened after merge. Fixes [#10489](https://github.com/ClickHouse/ClickHouse/issues/10489). [#10721](https://github.com/ClickHouse/ClickHouse/pull/10721) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Fix usage of primary key wrapped into a function with 'FINAL' modifier and 'ORDER BY' optimization. [#10715](https://github.com/ClickHouse/ClickHouse/pull/10715) ([Anton Popov](https://github.com/CurtizJ)).
+* Fix possible buffer overflow in function `h3EdgeAngle`. [#10711](https://github.com/ClickHouse/ClickHouse/pull/10711) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix disappearing totals. Totals could have being filtered if query had had join or subquery with external where condition. Fixes [#10674](https://github.com/ClickHouse/ClickHouse/issues/10674). [#10698](https://github.com/ClickHouse/ClickHouse/pull/10698) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Fix atomicity of HTTP insert. This fixes [#9666](https://github.com/ClickHouse/ClickHouse/issues/9666). [#10687](https://github.com/ClickHouse/ClickHouse/pull/10687) ([Andrew Onyshchuk](https://github.com/oandrew)).
+* Fix multiple usages of `IN` operator with the identical set in one query. [#10686](https://github.com/ClickHouse/ClickHouse/pull/10686) ([Anton Popov](https://github.com/CurtizJ)).
+* Fixed bug, which causes http requests stuck on client close when `readonly=2` and `cancel_http_readonly_queries_on_client_close=1`. Fixes [#7939](https://github.com/ClickHouse/ClickHouse/issues/7939), [#7019](https://github.com/ClickHouse/ClickHouse/issues/7019), [#7736](https://github.com/ClickHouse/ClickHouse/issues/7736), [#7091](https://github.com/ClickHouse/ClickHouse/issues/7091). [#10684](https://github.com/ClickHouse/ClickHouse/pull/10684) ([tavplubix](https://github.com/tavplubix)).
+* Fix order of parameters in AggregateTransform constructor. [#10667](https://github.com/ClickHouse/ClickHouse/pull/10667) ([palasonic1](https://github.com/palasonic1)).
+* Fix the lack of parallel execution of remote queries with `distributed_aggregation_memory_efficient` enabled. Fixes [#10655](https://github.com/ClickHouse/ClickHouse/issues/10655). [#10664](https://github.com/ClickHouse/ClickHouse/pull/10664) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Fix possible incorrect number of rows for queries with `LIMIT`. Fixes [#10566](https://github.com/ClickHouse/ClickHouse/issues/10566), [#10709](https://github.com/ClickHouse/ClickHouse/issues/10709). [#10660](https://github.com/ClickHouse/ClickHouse/pull/10660) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Fix bug which locks concurrent alters when table has a lot of parts. [#10659](https://github.com/ClickHouse/ClickHouse/pull/10659) ([alesapin](https://github.com/alesapin)).
+* Fix nullptr dereference in StorageBuffer if server was shutdown before table startup. [#10641](https://github.com/ClickHouse/ClickHouse/pull/10641) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix predicates optimization for distributed queries (`enable_optimize_predicate_expression=1`) for queries with `HAVING` section (i.e. when filtering on the server initiator is required), by preserving the order of expressions (and this is enough to fix), and also force aggregator use column names over indexes. Fixes: [#10613](https://github.com/ClickHouse/ClickHouse/issues/10613), [#11413](https://github.com/ClickHouse/ClickHouse/issues/11413). [#10621](https://github.com/ClickHouse/ClickHouse/pull/10621) ([Azat Khuzhin](https://github.com/azat)).
+* Fix optimize_skip_unused_shards with LowCardinality. [#10611](https://github.com/ClickHouse/ClickHouse/pull/10611) ([Azat Khuzhin](https://github.com/azat)).
+* Fix segfault in StorageBuffer when exception on server startup. Fixes [#10550](https://github.com/ClickHouse/ClickHouse/issues/10550). [#10609](https://github.com/ClickHouse/ClickHouse/pull/10609) ([tavplubix](https://github.com/tavplubix)).
+* On `SYSTEM DROP DNS CACHE` query also drop caches, which are used to check if user is allowed to connect from some IP addresses. [#10608](https://github.com/ClickHouse/ClickHouse/pull/10608) ([tavplubix](https://github.com/tavplubix)).
+* Fixed incorrect scalar results inside inner query of `MATERIALIZED VIEW` in case if this query contained dependent table. [#10603](https://github.com/ClickHouse/ClickHouse/pull/10603) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Fixed handling condition variable for synchronous mutations. In some cases signals to that condition variable could be lost. [#10588](https://github.com/ClickHouse/ClickHouse/pull/10588) ([Vladimir Chebotarev](https://github.com/excitoon)).
+* This PR fixes possible crash when `createDictionary()` is called before `loadStoredObject()` has finished. [#10587](https://github.com/ClickHouse/ClickHouse/pull/10587) ([Vitaly Baranov](https://github.com/vitlibar)).
+* Fix error `the BloomFilter false positive must be a double number between 0 and 1` [#10551](https://github.com/ClickHouse/ClickHouse/issues/10551). [#10569](https://github.com/ClickHouse/ClickHouse/pull/10569) ([Winter Zhang](https://github.com/zhang2014)).
+* Fix SELECT of column ALIAS which default expression type different from column type. [#10563](https://github.com/ClickHouse/ClickHouse/pull/10563) ([Azat Khuzhin](https://github.com/azat)).
+* Implemented comparison between DateTime64 and String values (just like for DateTime). [#10560](https://github.com/ClickHouse/ClickHouse/pull/10560) ([Vasily Nemkov](https://github.com/Enmk)).
+* Fix index corruption, which may accur in some cases after merge compact parts into another compact part. [#10531](https://github.com/ClickHouse/ClickHouse/pull/10531) ([Anton Popov](https://github.com/CurtizJ)).
+* Disable GROUP BY sharding_key optimization by default (`optimize_distributed_group_by_sharding_key` had been introduced and turned of by default, due to trickery of sharding_key analyzing, simple example is `if` in sharding key) and fix it for WITH ROLLUP/CUBE/TOTALS. [#10516](https://github.com/ClickHouse/ClickHouse/pull/10516) ([Azat Khuzhin](https://github.com/azat)).
+* Fixes: [#10263](https://github.com/ClickHouse/ClickHouse/issues/10263) (after that PR dist send via INSERT had been postponing on each INSERT) Fixes: [#8756](https://github.com/ClickHouse/ClickHouse/issues/8756) (that PR breaks distributed sends with all of the following conditions met (unlikely setup for now I guess): `internal_replication == false`, multiple local shards (activates the hardlinking code) and `distributed_storage_policy` (makes `link(2)` fails on `EXDEV`)). [#10486](https://github.com/ClickHouse/ClickHouse/pull/10486) ([Azat Khuzhin](https://github.com/azat)).
+* Fixed error with "max_rows_to_sort" limit. [#10268](https://github.com/ClickHouse/ClickHouse/pull/10268) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+
+#### Improvement
+
+* Rewrite code for `optimize_arithmetic_operations_in_aggregate_functions` optimisation. [#11899](https://github.com/ClickHouse/ClickHouse/pull/11899) ([Artem Zuikov](https://github.com/4ertus2)).
+* When reading Decimal value, cut extra digits after point. This behaviour is more compatible with MySQL and PostgreSQL. This fixes [#10202](https://github.com/ClickHouse/ClickHouse/issues/10202). [#11831](https://github.com/ClickHouse/ClickHouse/pull/11831) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Slightly improve diagnostic of reading decimal from string. This closes [#10202](https://github.com/ClickHouse/ClickHouse/issues/10202). [#11829](https://github.com/ClickHouse/ClickHouse/pull/11829) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix sleep invocation in signal handler. It was sleeping for less amount of time than expected. [#11825](https://github.com/ClickHouse/ClickHouse/pull/11825) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Added `hostname` as an alias to function `hostName`. This feature was suggested by Victor Tarnavskiy from Yandex.Metrica. [#11821](https://github.com/ClickHouse/ClickHouse/pull/11821) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Remove leader election, step 3: remove yielding of leadership; remove sending queries to leader. [#11795](https://github.com/ClickHouse/ClickHouse/pull/11795) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Add more `jemalloc` statistics to `system.asynchronous_metrics`, and ensure that we see up-to-date values for them. [#11748](https://github.com/ClickHouse/ClickHouse/pull/11748) ([Alexander Kuzmenkov](https://github.com/akuzm)).
+* Add `cast_keep_nullable` setting. If set `CAST(something_nullable AS Type)` return `Nullable(Type)`. [#11733](https://github.com/ClickHouse/ClickHouse/pull/11733) ([Artem Zuikov](https://github.com/4ertus2)).
+* Added support for distributed `DDL` (update/delete/drop partition) on cross replication clusters. [#11703](https://github.com/ClickHouse/ClickHouse/pull/11703) ([Nikita Mikhaylov](https://github.com/nikitamikhaylov)).
+* Emit warning instead of error in server log at startup if we cannot listen one of the listen addresses (e.g. IPv6 is unavailable inside Docker). Note that if server fails to listen all listed addresses, it will refuse to startup as before. This fixes [#4406](https://github.com/ClickHouse/ClickHouse/issues/4406). [#11687](https://github.com/ClickHouse/ClickHouse/pull/11687) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* When multiline query is printed to server log, the lines are joined. Make it to work correct in case of multiline string literals, identifiers and single-line comments. This fixes [#3853](https://github.com/ClickHouse/ClickHouse/issues/3853). [#11686](https://github.com/ClickHouse/ClickHouse/pull/11686) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Multiple names are now allowed in commands: CREATE USER, CREATE ROLE, ALTER USER, SHOW CREATE USER, SHOW GRANTS and so on. [#11670](https://github.com/ClickHouse/ClickHouse/pull/11670) ([Vitaly Baranov](https://github.com/vitlibar)).
+* Clear password from command line in `clickhouse-client` and `clickhouse-benchmark` if the user has specified it with explicit value. This prevents password exposure by `ps` and similar tools. [#11665](https://github.com/ClickHouse/ClickHouse/pull/11665) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Don't use debug info from ELF file if it doesn't correspond to the running binary. It is needed to avoid printing wrong function names and source locations in stack traces. This fixes [#7514](https://github.com/ClickHouse/ClickHouse/issues/7514). [#11657](https://github.com/ClickHouse/ClickHouse/pull/11657) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Added column `position` to `system.columns` table and `column_position` to `system.parts_columns` table. It contains ordinal position of a column in a table starting with 1. This closes [#7744](https://github.com/ClickHouse/ClickHouse/issues/7744). [#11655](https://github.com/ClickHouse/ClickHouse/pull/11655) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Return NULL/zero when value is not parsed completely in parseDateTimeBestEffortOrNull/Zero functions. This fixes [#7876](https://github.com/ClickHouse/ClickHouse/issues/7876). [#11653](https://github.com/ClickHouse/ClickHouse/pull/11653) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Allow to DROP replicated table if the metadata in ZooKeeper was already removed and does not exist (this is also the case when using TestKeeper for testing and the server was restarted). Allow to RENAME replicated table even if there is an error communicating with ZooKeeper. This fixes [#10720](https://github.com/ClickHouse/ClickHouse/issues/10720). [#11652](https://github.com/ClickHouse/ClickHouse/pull/11652) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Skip empty parameters in requested URL. They may appear when you write `http://localhost:8123/?&a=b` or `http://localhost:8123/?a=b&&c=d`. This closes [#10749](https://github.com/ClickHouse/ClickHouse/issues/10749). [#11651](https://github.com/ClickHouse/ClickHouse/pull/11651) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Allow using `groupArrayArray` and `groupUniqArrayArray` as `SimpleAggregateFunction`. [#11650](https://github.com/ClickHouse/ClickHouse/pull/11650) ([Volodymyr Kuznetsov](https://github.com/ksvladimir)).
+* Allow comparison with constant strings by implicit conversions when analysing index conditions on other types. This may close [#11630](https://github.com/ClickHouse/ClickHouse/issues/11630). [#11648](https://github.com/ClickHouse/ClickHouse/pull/11648) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Allow comparison of numbers with constant string in comparison operators, IN and VALUES sections. [#11647](https://github.com/ClickHouse/ClickHouse/pull/11647) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Add round_robin load_balancing. [#11645](https://github.com/ClickHouse/ClickHouse/pull/11645) ([Azat Khuzhin](https://github.com/azat)).
+* https://github.com/ClickHouse/ClickHouse/pull/7572#issuecomment-642815377 Support config default HTTPHandlers. [#11628](https://github.com/ClickHouse/ClickHouse/pull/11628) ([Winter Zhang](https://github.com/zhang2014)).
+* Make more input format work with Kafka engine. Fix the issue with premature flushes. Fix the performance issue when `kafka_num_consumers` is greater than number of partitions in topic. [#11599](https://github.com/ClickHouse/ClickHouse/pull/11599) ([filimonov](https://github.com/filimonov)).
+* Improve `multiple_joins_rewriter_version=2` logic. Fix unknown columns error for lambda aliases. [#11587](https://github.com/ClickHouse/ClickHouse/pull/11587) ([Artem Zuikov](https://github.com/4ertus2)).
+* Optimize memory usage when reading a response from an S3 HTTP client. [#11561](https://github.com/ClickHouse/ClickHouse/pull/11561) ([Pavel Kovalenko](https://github.com/Jokser)).
+* Better exception message when cannot parse columns declaration list. This closes [#10403](https://github.com/ClickHouse/ClickHouse/issues/10403). [#11537](https://github.com/ClickHouse/ClickHouse/pull/11537) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Improve `enable_optimize_predicate_expression=1` logic for VIEW. [#11513](https://github.com/ClickHouse/ClickHouse/pull/11513) ([Artem Zuikov](https://github.com/4ertus2)).
+* Adding support for PREWHERE in live view tables. [#11495](https://github.com/ClickHouse/ClickHouse/pull/11495) ([vzakaznikov](https://github.com/vzakaznikov)).
+* Automatically update DNS cache, which is used to check if user is allowed to connect from an address. [#11487](https://github.com/ClickHouse/ClickHouse/pull/11487) ([tavplubix](https://github.com/tavplubix)).
+* ON CLUSTER support for SYSTEM {FLUSH DISTRIBUTED,STOP/START DISTRIBUTED SEND}. [#11415](https://github.com/ClickHouse/ClickHouse/pull/11415) ([Azat Khuzhin](https://github.com/azat)).
+* Add system.distribution_queue table. [#11394](https://github.com/ClickHouse/ClickHouse/pull/11394) ([Azat Khuzhin](https://github.com/azat)).
+* Support for all format settings in Kafka, expose some setting on table level, adjust the defaults for better performance. [#11388](https://github.com/ClickHouse/ClickHouse/pull/11388) ([filimonov](https://github.com/filimonov)).
+* OPTIMIZE FINAL will force merge even if concurrent merges are performed. This closes [#11309](https://github.com/ClickHouse/ClickHouse/issues/11309) and closes [#11322](https://github.com/ClickHouse/ClickHouse/issues/11322). [#11346](https://github.com/ClickHouse/ClickHouse/pull/11346) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Suppress output of cancelled queries in clickhouse-client. In previous versions result may continue to print in terminal even after you press Ctrl+C to cancel query. This closes [#9473](https://github.com/ClickHouse/ClickHouse/issues/9473). [#11342](https://github.com/ClickHouse/ClickHouse/pull/11342) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Better log messages in while reloading configuration. [#11341](https://github.com/ClickHouse/ClickHouse/pull/11341) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Remove trailing whitespaces from formatted queries in `clickhouse-client` or `clickhouse-format` in some cases. [#11325](https://github.com/ClickHouse/ClickHouse/pull/11325) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Add setting "output_format_pretty_max_value_width". If value is longer, it will be cut to avoid output of too large values in terminal. This closes [#11140](https://github.com/ClickHouse/ClickHouse/issues/11140). [#11324](https://github.com/ClickHouse/ClickHouse/pull/11324) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Better exception message in case when there is shortage of memory mappings. This closes [#11027](https://github.com/ClickHouse/ClickHouse/issues/11027). [#11316](https://github.com/ClickHouse/ClickHouse/pull/11316) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Support (U)Int8, (U)Int16, Date in ASOF JOIN. [#11301](https://github.com/ClickHouse/ClickHouse/pull/11301) ([Artem Zuikov](https://github.com/4ertus2)).
+* Update librdkafka to version [1.4.2](https://github.com/edenhill/librdkafka/releases/tag/v1.4.2). [#11256](https://github.com/ClickHouse/ClickHouse/pull/11256) ([filimonov](https://github.com/filimonov)).
+* Support kafka_client_id parameter for Kafka tables. It also changes the default `client.id` used by ClickHouse when communicating with Kafka to be more verbose and usable. [#11252](https://github.com/ClickHouse/ClickHouse/pull/11252) ([filimonov](https://github.com/filimonov)).
+* Keep the value of `DistributedFilesToInsert` metric on exceptions. In previous versions, the value was set when we are going to send some files, but it is zero, if there was an exception and some files are still pending. Now it corresponds to the number of pending files in filesystem. [#11220](https://github.com/ClickHouse/ClickHouse/pull/11220) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Add support for multi-word data type names (such as `DOUBLE PRECISION` and `CHAR VARYING`) for better SQL compatibility. [#11214](https://github.com/ClickHouse/ClickHouse/pull/11214) ([Павел Потемкин](https://github.com/Potya)).
+* When parsing C-style backslash escapes in string literals, VALUES and various text formats (this is an extension to SQL standard that is endemic for ClickHouse and MySQL), keep backslash if unknown escape sequence is found (e.g. `\%` or `\w`) that will make usage of `LIKE` and `match` regular expressions more convenient (it's enough to write `name LIKE 'used\_cars'` instead of `name LIKE 'used\\_cars'`) and more compatible at the same time. This fixes [#10922](https://github.com/ClickHouse/ClickHouse/issues/10922). [#11208](https://github.com/ClickHouse/ClickHouse/pull/11208) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* The query log is now enabled by default. [#11184](https://github.com/ClickHouse/ClickHouse/pull/11184) ([Ivan Blinkov](https://github.com/blinkov)).
+* Resolved [#7224](https://github.com/ClickHouse/ClickHouse/issues/7224): added `FailedQuery`, `FailedSelectQuery` and `FailedInsertQuery` metrics to `system.events` table. [#11151](https://github.com/ClickHouse/ClickHouse/pull/11151) ([Nikita Orlov](https://github.com/naorlov)).
+* Add port() function (to extract port from URL). [#11120](https://github.com/ClickHouse/ClickHouse/pull/11120) ([Azat Khuzhin](https://github.com/azat)).
+* Enable percpu_arena:percpu for jemalloc (This will reduce memory fragmentation due to thread pool). [#11084](https://github.com/ClickHouse/ClickHouse/pull/11084) ([Azat Khuzhin](https://github.com/azat)).
+* Show authentication type in table system.users and while executing SHOW CREATE USER query. [#11080](https://github.com/ClickHouse/ClickHouse/pull/11080) ([Vitaly Baranov](https://github.com/vitlibar)).
+* Now `dictGet*` functions accept table names. [#11050](https://github.com/ClickHouse/ClickHouse/pull/11050) ([Vitaly Baranov](https://github.com/vitlibar)).
+* Apply `TTL` for old data, after `ALTER MODIFY TTL` query. This behaviour is controlled by setting `materialize_ttl_after_modify`, which is enabled by default. [#11042](https://github.com/ClickHouse/ClickHouse/pull/11042) ([Anton Popov](https://github.com/CurtizJ)).
+* Add `NCHAR` and `NVARCHAR` synonims for data types. [#11025](https://github.com/ClickHouse/ClickHouse/pull/11025) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Remove data on explicit `DROP DATABASE` for `Memory` database engine. Fixes [#10557](https://github.com/ClickHouse/ClickHouse/issues/10557). [#11021](https://github.com/ClickHouse/ClickHouse/pull/11021) ([tavplubix](https://github.com/tavplubix)).
+* Set thread names for internal threads of rdkafka library. Make logs from rdkafka available in server logs. [#10983](https://github.com/ClickHouse/ClickHouse/pull/10983) ([Azat Khuzhin](https://github.com/azat)).
+* Some additions and cleanup for [#10232](https://github.com/ClickHouse/ClickHouse/issues/10232). [#10934](https://github.com/ClickHouse/ClickHouse/pull/10934) ([Artem Zuikov](https://github.com/4ertus2)).
+* Support for unicode whitespaces in queries. This helps when queries are copy-pasted from Word or from web page. This fixes [#10896](https://github.com/ClickHouse/ClickHouse/issues/10896). [#10903](https://github.com/ClickHouse/ClickHouse/pull/10903) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Allow large UInt types as the index in function `tupleElement`. [#10874](https://github.com/ClickHouse/ClickHouse/pull/10874) ([hcz](https://github.com/hczhcz)).
+* Respect prefer_localhost_replica/load_balancing on INSERT into Distributed. [#10867](https://github.com/ClickHouse/ClickHouse/pull/10867) ([Azat Khuzhin](https://github.com/azat)).
+* Introduce `min_insert_block_size_rows_for_materialized_views ` , `min_insert_block_size_bytes_for_materialized_views` settings. This settings are similar to `min_insert_block_size_rows` and `min_insert_block_size_bytes`, but applied only for blocks inserted into `MATERIALIZED VIEW`. It helps to control blocks squashing while pushing to MVs and avoid excessive memory usage. [#10858](https://github.com/ClickHouse/ClickHouse/pull/10858) ([Azat Khuzhin](https://github.com/azat)).
+* The `clickhouse-format` tool is now able to format multiple queries when the `-n` argument is used. [#10852](https://github.com/ClickHouse/ClickHouse/pull/10852) ([Darío](https://github.com/dgrr)).
+* Get rid of exception from replicated queue during server shutdown. Fixes [#10819](https://github.com/ClickHouse/ClickHouse/issues/10819). [#10841](https://github.com/ClickHouse/ClickHouse/pull/10841) ([alesapin](https://github.com/alesapin)).
+* Ensure that `varSamp`, `varPop` cannot return negative results due to numerical errors and that `stddevSamp`, `stddevPop` cannot be calculated from negative variance. This fixes [#10532](https://github.com/ClickHouse/ClickHouse/issues/10532). [#10829](https://github.com/ClickHouse/ClickHouse/pull/10829) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Better DNS exception message. This fixes [#10813](https://github.com/ClickHouse/ClickHouse/issues/10813). [#10828](https://github.com/ClickHouse/ClickHouse/pull/10828) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Possibility to configure proxy-resolver for DiskS3. [#10744](https://github.com/ClickHouse/ClickHouse/pull/10744) ([Pavel Kovalenko](https://github.com/Jokser)).
+* Added a check for meaningless codecs and a setting `allow_suspicious_codecs` to control this check. This closes [#4966](https://github.com/ClickHouse/ClickHouse/issues/4966). [#10645](https://github.com/ClickHouse/ClickHouse/pull/10645) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Change HTTP response code in case of some parse errors to 400 Bad Request. This fix [#10636](https://github.com/ClickHouse/ClickHouse/issues/10636). [#10640](https://github.com/ClickHouse/ClickHouse/pull/10640) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Print a message if clickhouse-client is newer than clickhouse-server. [#10627](https://github.com/ClickHouse/ClickHouse/pull/10627) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Make pointInPolygon work with non-constant polygon. PointInPolygon now can take Array(Array(Tuple(..., ...))) as second argument, array of polygon and holes. [#10623](https://github.com/ClickHouse/ClickHouse/pull/10623) ([Alexey Ilyukhov](https://github.com/livace)).
+* Added `move_ttl_info` to `system.parts` in order to provide introspection of move TTL functionality. [#10591](https://github.com/ClickHouse/ClickHouse/pull/10591) ([Vladimir Chebotarev](https://github.com/excitoon)).
+* Possibility to work with S3 through proxies. [#10576](https://github.com/ClickHouse/ClickHouse/pull/10576) ([Pavel Kovalenko](https://github.com/Jokser)).
+* - Adding support for `INSERT INTO [db.]table WATCH` query. [#10498](https://github.com/ClickHouse/ClickHouse/pull/10498) ([vzakaznikov](https://github.com/vzakaznikov)).
+* Added system tables for users, roles, grants, settings profiles, quotas, row policies; added commands SHOW USER, SHOW [CURRENT|ENABLED] ROLES, SHOW SETTINGS PROFILES. [#10387](https://github.com/ClickHouse/ClickHouse/pull/10387) ([Vitaly Baranov](https://github.com/vitlibar)).
+* Allow to pass quota_key in clickhouse-client. This closes [#10227](https://github.com/ClickHouse/ClickHouse/issues/10227). [#10270](https://github.com/ClickHouse/ClickHouse/pull/10270) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+
+#### Performance Improvement
+
+* This optimization eliminates min/max/any aggregators of GROUP BY keys in SELECT section. [#11667](https://github.com/ClickHouse/ClickHouse/pull/11667) ([xPoSx](https://github.com/xPoSx)).
+* Allow multiple replicas to assign merges, mutations, partition drop, move and replace concurrently. This closes [#10367](https://github.com/ClickHouse/ClickHouse/issues/10367). [#11639](https://github.com/ClickHouse/ClickHouse/pull/11639) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* New optimization that takes all operations out of "any" function. [#11529](https://github.com/ClickHouse/ClickHouse/pull/11529) ([Ruslan](https://github.com/kamalov-ruslan)).
+* Improve performance of `clickhouse-client` in interactive mode when Pretty formats are used. In previous versions, significant amount of time can be spent calculating visible width of UTF-8 string. This closes [#11323](https://github.com/ClickHouse/ClickHouse/issues/11323). [#11323](https://github.com/ClickHouse/ClickHouse/pull/11323) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Improve performance for INSERT queries via INSERT SELECT or INSERT with clickhouse-client when small blocks are generated (typical case with parallel parsing). This fixes [#11275](https://github.com/ClickHouse/ClickHouse/issues/11275). Fix the issue that CONSTRAINTs were not working for DEFAULT fields. This fixes [#11273](https://github.com/ClickHouse/ClickHouse/issues/11273). Fix the issue that CONSTRAINTS were ignored for TEMPORARY tables. This fixes [#11274](https://github.com/ClickHouse/ClickHouse/issues/11274). [#11276](https://github.com/ClickHouse/ClickHouse/pull/11276) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Improved performance for queries with `ORDER BY` and small `LIMIT` (less, then `max_block_size`). [#11171](https://github.com/ClickHouse/ClickHouse/pull/11171) ([Albert Kidrachev](https://github.com/Provet)).
+* Enable mlock of clickhouse binary by default. It will prevent clickhouse executable from being paged out under high IO load. [#11139](https://github.com/ClickHouse/ClickHouse/pull/11139) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Make queries with `sum` aggregate function and without GROUP BY keys to run multiple times faster. [#10992](https://github.com/ClickHouse/ClickHouse/pull/10992) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Improving radix sort by removing some redundant data moves. [#10981](https://github.com/ClickHouse/ClickHouse/pull/10981) ([Arslan Gumerov](https://github.com/g-arslan)).
+* Get dictionary and check access rights only once per each call of any function reading external dictionaries. [#10928](https://github.com/ClickHouse/ClickHouse/pull/10928) ([Vitaly Baranov](https://github.com/vitlibar)).
+* Sort bigger parts of the left table in MergeJoin. Buffer left blocks in memory. Add `partial_merge_join_left_table_buffer_bytes` setting to manage the left blocks buffers sizes. [#10601](https://github.com/ClickHouse/ClickHouse/pull/10601) ([Artem Zuikov](https://github.com/4ertus2)).
+* Remove duplicate ORDER BY and DISTINCT from subqueries. [#10067](https://github.com/ClickHouse/ClickHouse/pull/10067) ([Mikhail Malafeev](https://github.com/demo-99)).
+* This feature eliminates functions of other keys in GROUP BY section. [#10051](https://github.com/ClickHouse/ClickHouse/pull/10051) ([xPoSx](https://github.com/xPoSx)).
+* New optimization that takes arithmetic operations out of aggregate functions. [#10047](https://github.com/ClickHouse/ClickHouse/pull/10047) ([Ruslan](https://github.com/kamalov-ruslan)).
+* Optimization of GROUP BY with respect to table sorting key. [#9113](https://github.com/ClickHouse/ClickHouse/pull/9113) ([dimarub2000](https://github.com/dimarub2000)).
+
+#### Build/Testing/Packaging Improvement
+
+* Remove dependency on `tzdata`: do not fail if `/usr/share/zoneinfo` directory does not exist. Note that all timezones work in ClickHouse even without tzdata installed in system. [#11827](https://github.com/ClickHouse/ClickHouse/pull/11827) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Print compiler build id in crash messages. It will make us slightly more certain about what binary has crashed. Added new function `buildId`. [#11824](https://github.com/ClickHouse/ClickHouse/pull/11824) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Added a test to ensure that mutations continue to work after FREEZE query. [#11820](https://github.com/ClickHouse/ClickHouse/pull/11820) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Don't allow tests with "fail" substring in their names because it makes looking at the tests results in browser less convenient when you type Ctrl+F and search for "fail". [#11817](https://github.com/ClickHouse/ClickHouse/pull/11817) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Removes unused imports from HTTPHandlerFactory. [#11660](https://github.com/ClickHouse/ClickHouse/pull/11660) ([Bharat Nallan](https://github.com/bharatnc)).
+* Added a random sampling of instances where copier is executed. It is needed to avoid `Too many simultaneous queries` error. Also increased timeout and decreased fault probability. [#11573](https://github.com/ClickHouse/ClickHouse/pull/11573) ([Nikita Mikhaylov](https://github.com/nikitamikhaylov)).
+* Fix missed include for `std::move` used at line 17. [#11525](https://github.com/ClickHouse/ClickHouse/pull/11525) ([Matwey V. Kornilov](https://github.com/matwey)).
+* Speed up build by removing old example programs. Also found some orphan functional test. [#11486](https://github.com/ClickHouse/ClickHouse/pull/11486) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Increase ccache size for builds in CI. [#11450](https://github.com/ClickHouse/ClickHouse/pull/11450) ([alesapin](https://github.com/alesapin)).
+* Leave only unit_tests_dbms in deb build. [#11429](https://github.com/ClickHouse/ClickHouse/pull/11429) ([Ilya Yatsishin](https://github.com/qoega)).
+* Refactor CMake build files. [#11390](https://github.com/ClickHouse/ClickHouse/pull/11390) ([Ivan](https://github.com/abyss7)).
+* Fix several flaky integration tests. [#11355](https://github.com/ClickHouse/ClickHouse/pull/11355) ([alesapin](https://github.com/alesapin)).
+* Add support for unit tests run with UBSan. [#11345](https://github.com/ClickHouse/ClickHouse/pull/11345) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Remove redundant timeout from integration test `test_insertion_sync_fails_with_timeout`. [#11343](https://github.com/ClickHouse/ClickHouse/pull/11343) ([alesapin](https://github.com/alesapin)).
+* Better check for hung queries in clickhouse-test. [#11321](https://github.com/ClickHouse/ClickHouse/pull/11321) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Emit a warning if server was build in debug or with sanitizers. [#11304](https://github.com/ClickHouse/ClickHouse/pull/11304) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Now clickhouse-test check the server aliveness before tests run. [#11285](https://github.com/ClickHouse/ClickHouse/pull/11285) ([alesapin](https://github.com/alesapin)).
+* Fix potentially flacky test `00731_long_merge_tree_select_opened_files.sh`. It does not fail frequently but we have discovered potential race condition in this test while experimenting with ThreadFuzzer: [#9814](https://github.com/ClickHouse/ClickHouse/issues/9814) See [link](https://clickhouse-test-reports.s3.yandex.net/9814/40e3023e215df22985d275bf85f4d2290897b76b/functional_stateless_tests_(unbundled).html#fail1) for the example. [#11270](https://github.com/ClickHouse/ClickHouse/pull/11270) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Repeat test in CI if `curl` invocation was timed out. It is possible due to system hangups for 10+ seconds that are typical in our CI infrastructure. This fixes [#11267](https://github.com/ClickHouse/ClickHouse/issues/11267). [#11268](https://github.com/ClickHouse/ClickHouse/pull/11268) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Add a test for Join table engine from @donmikel. This closes [#9158](https://github.com/ClickHouse/ClickHouse/issues/9158). [#11265](https://github.com/ClickHouse/ClickHouse/pull/11265) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix several non significant errors in unit tests. [#11262](https://github.com/ClickHouse/ClickHouse/pull/11262) ([alesapin](https://github.com/alesapin)).
+* Now parts of linker command for `cctz` library will not be shuffled with other libraries. [#11213](https://github.com/ClickHouse/ClickHouse/pull/11213) ([alesapin](https://github.com/alesapin)).
+* Split /programs/server into actual program and library. [#11186](https://github.com/ClickHouse/ClickHouse/pull/11186) ([Ivan](https://github.com/abyss7)).
+* Improve build scripts for protobuf & gRPC. [#11172](https://github.com/ClickHouse/ClickHouse/pull/11172) ([Vitaly Baranov](https://github.com/vitlibar)).
+* Enable performance test that was not working. [#11158](https://github.com/ClickHouse/ClickHouse/pull/11158) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Create root S3 bucket for tests before any CH instance is started. [#11142](https://github.com/ClickHouse/ClickHouse/pull/11142) ([Pavel Kovalenko](https://github.com/Jokser)).
+* Add performance test for non-constant polygons. [#11141](https://github.com/ClickHouse/ClickHouse/pull/11141) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Make `system_tables_lazy_load` false by default. [#11029](https://github.com/ClickHouse/ClickHouse/pull/11029) ([Azat Khuzhin](https://github.com/azat)).
+* Fixing 00979_live_view_watch_continuous_aggregates test. [#11024](https://github.com/ClickHouse/ClickHouse/pull/11024) ([vzakaznikov](https://github.com/vzakaznikov)).
+* Add ability to run zookeeper in integration tests over tmpfs. [#11002](https://github.com/ClickHouse/ClickHouse/pull/11002) ([alesapin](https://github.com/alesapin)).
+* Enable clang-tidy for programs and utils. [#10991](https://github.com/ClickHouse/ClickHouse/pull/10991) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Wait for odbc-bridge with exponential backoff. Previous wait time of 200 ms was not enough in our CI environment. [#10990](https://github.com/ClickHouse/ClickHouse/pull/10990) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix non-deterministic test. [#10989](https://github.com/ClickHouse/ClickHouse/pull/10989) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Return tzdata to build images and as dependency to .deb package. [#10929](https://github.com/ClickHouse/ClickHouse/pull/10929) ([alesapin](https://github.com/alesapin)).
+* Added a test for empty external data. [#10926](https://github.com/ClickHouse/ClickHouse/pull/10926) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Database is recreated for every test. This improves separation of tests. [#10902](https://github.com/ClickHouse/ClickHouse/pull/10902) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Prepare to add MSan and UBSan stress tests. [#10871](https://github.com/ClickHouse/ClickHouse/pull/10871) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Added more asserts in columns code. [#10833](https://github.com/ClickHouse/ClickHouse/pull/10833) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Better cooperation with sanitizers. Print information about query_id in the message of sanitizer failure. [#10832](https://github.com/ClickHouse/ClickHouse/pull/10832) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix obvious race condition in "Split build smoke test" check. [#10820](https://github.com/ClickHouse/ClickHouse/pull/10820) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix (false) MSan report in MergeTreeIndexFullText. The issue first appeared in [#9968](https://github.com/ClickHouse/ClickHouse/issues/9968). [#10801](https://github.com/ClickHouse/ClickHouse/pull/10801) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Add MSan suppression for MariaDB Client library. [#10800](https://github.com/ClickHouse/ClickHouse/pull/10800) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* GRPC make couldn't find protobuf files, changed make file by adding the right link. [#10794](https://github.com/ClickHouse/ClickHouse/pull/10794) ([mnkonkova](https://github.com/mnkonkova)).
+* Enable extra warnings for base, utils, programs. [#10779](https://github.com/ClickHouse/ClickHouse/pull/10779) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Suppressions of warnings from libraries was mistakenly declared as public in [#10396](https://github.com/ClickHouse/ClickHouse/issues/10396). [#10776](https://github.com/ClickHouse/ClickHouse/pull/10776) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Restore a patch that was accidentially deleted in [#10396](https://github.com/ClickHouse/ClickHouse/issues/10396). [#10774](https://github.com/ClickHouse/ClickHouse/pull/10774) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix performance tests errors, part 2. [#10773](https://github.com/ClickHouse/ClickHouse/pull/10773) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix performance test errors. [#10766](https://github.com/ClickHouse/ClickHouse/pull/10766) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Update cross-builds to use clang-10 compiler. [#10724](https://github.com/ClickHouse/ClickHouse/pull/10724) ([Ivan](https://github.com/abyss7)).
+* Update instruction to install RPM packages. This was suggested by Denis (TG login @ldviolet) and implemented by Arkady Shejn. [#10707](https://github.com/ClickHouse/ClickHouse/pull/10707) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Trying to fix tests/queries/0_stateless/01246_insert_into_watch_live_view.py test. [#10670](https://github.com/ClickHouse/ClickHouse/pull/10670) ([vzakaznikov](https://github.com/vzakaznikov)).
+* Volumes and storages refactoring. [#10666](https://github.com/ClickHouse/ClickHouse/pull/10666) ([Gleb Novikov](https://github.com/NanoBjorn)).
+* Update zstd to 1.4.4. It has some minor improvements in performance and compression ratio. If you run replicas with different versions of ClickHouse you may see reasonable error messages `Data after merge is not byte-identical to data on another replicas.` with explanation. These messages are Ok and you should not worry. [#10663](https://github.com/ClickHouse/ClickHouse/pull/10663) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fixing and re-enabling 00979_live_view_watch_continuous_aggregates.py test. [#10658](https://github.com/ClickHouse/ClickHouse/pull/10658) ([vzakaznikov](https://github.com/vzakaznikov)).
+* Fix OOM in ASan stress test. [#10646](https://github.com/ClickHouse/ClickHouse/pull/10646) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix UBSan report (adding zero to nullptr) in HashTable that appeared after migration to clang-10. [#10638](https://github.com/ClickHouse/ClickHouse/pull/10638) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Remove external call to `ld` (bfd) linker during tzdata processing in compile time. [#10634](https://github.com/ClickHouse/ClickHouse/pull/10634) ([alesapin](https://github.com/alesapin)).
+* Allow to use lld to link blobs (resources). [#10632](https://github.com/ClickHouse/ClickHouse/pull/10632) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix UBSan report in LZ4 library. [#10631](https://github.com/ClickHouse/ClickHouse/pull/10631) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Update LZ4 to the latest dev branch. It may fix the error under UBSan. [#10630](https://github.com/ClickHouse/ClickHouse/pull/10630) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Added auto-generated machine-readable file with list of stable versions. [#10628](https://github.com/ClickHouse/ClickHouse/pull/10628) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix `capnproto` version check for `capnp::UnalignedFlatArrayMessageReader`. [#10618](https://github.com/ClickHouse/ClickHouse/pull/10618) ([Matwey V. Kornilov](https://github.com/matwey)).
+* Lower memory usage in tests. It may fix the issue that "address sanitizer is out of memory" in stress test. [#10617](https://github.com/ClickHouse/ClickHouse/pull/10617) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fixing hard coded timeouts in new live view tests. [#10604](https://github.com/ClickHouse/ClickHouse/pull/10604) ([vzakaznikov](https://github.com/vzakaznikov)).
+* Increasing timeout when opening a client in tests/queries/0_stateless/helpers/client.py. [#10599](https://github.com/ClickHouse/ClickHouse/pull/10599) ([vzakaznikov](https://github.com/vzakaznikov)).
+* Enable ThinLTO for clang builds, continuation of https://github.com/ClickHouse/ClickHouse/pull/10435. [#10585](https://github.com/ClickHouse/ClickHouse/pull/10585) ([Amos Bird](https://github.com/amosbird)).
+* Adding fuzzers and preparing for oss-fuzz integration. [#10546](https://github.com/ClickHouse/ClickHouse/pull/10546) ([kyprizel](https://github.com/kyprizel)).
+* Fix UBSan report in Decimal parse. This fixes [#7540](https://github.com/ClickHouse/ClickHouse/issues/7540). [#10512](https://github.com/ClickHouse/ClickHouse/pull/10512) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix FreeBSD build. [#10150](https://github.com/ClickHouse/ClickHouse/pull/10150) ([Ivan](https://github.com/abyss7)).
+* Add new build for query tests using pytest framework. [#10039](https://github.com/ClickHouse/ClickHouse/pull/10039) ([Ivan](https://github.com/abyss7)).
+
 ## ClickHouse release v20.4

 ### ClickHouse release v20.4.6.53-stable 2020-06-25
--- a/utils/simple-backport/changelog.sh
+++ b/utils/simple-backport/changelog.sh
@ -26,7 +26,9 @@ find_prs=(sed -n "s/^.*Merge pull request #\([[:digit:]]\+\).*$/\1/p;
                  s/^.*back[- ]*port[ed of]*#\([[:digit:]]\+\).*$/\1/Ip;
                  s/^.*cherry[- ]*pick[ed of]*#\([[:digit:]]\+\).*$/\1/Ip")

-"${find_prs[@]}" "changelog-log.txt" | sort -rn | uniq > "changelog-prs.txt"
+# awk is to filter out small task numbers from different task tracker, which are
+# referenced by documentation commits like '* DOCSUP-824: query log (#115)'.
+"${find_prs[@]}" "changelog-log.txt" | sort -rn | uniq | awk '$0 > 1000 { print $0 }' > "changelog-prs.txt"

 echo "$(wc -l < "changelog-prs.txt") PRs added between $from and $to."
 if [ $(wc -l < "changelog-prs.txt") -eq 0 ] ; then exit 0 ; fi
--- a/utils/simple-backport/format-changelog.py
+++ b/utils/simple-backport/format-changelog.py
@ -1,12 +1,13 @@
 #!/usr/bin/python3

-import os
-import sys
-import itertools
 import argparse
-import json
 import collections
+import fuzzywuzzy.fuzz
+import itertools
+import json
+import os
 import re
+import sys

 parser = argparse.ArgumentParser(description='Format changelog for given PRs.')
 parser.add_argument('file', metavar='FILE', type=argparse.FileType('r', encoding='utf-8'), nargs='?', default=sys.stdin, help='File with PR numbers, one per line.')
@ -26,7 +27,7 @@ def parse_one_pull_request(item):
    if lines:
        i = 0
        while i < len(lines):
-            if re.match(r'(?i).*category.*:$', lines[i]):
+            if re.match(r'(?i)^[>*_ ]*change\s*log\s*category', lines[i]):
                i += 1
                if i >= len(lines):
                    break
@ -37,7 +38,7 @@ def parse_one_pull_request(item):
                        break
                category = re.sub(r'^[-*\s]*', '', lines[i])
                i += 1
-            elif re.match(r'(?i)^\**\s*(Short description|Change\s*log entry)', lines[i]):
+            elif re.match(r'(?i)^[>*_ ]*(short\s*description|change\s*log\s*entry)', lines[i]):
                i += 1
                # Can have one empty line between header and the entry itself. Filter it out.
                if i < len(lines) and not lines[i]:
@ -74,6 +75,11 @@ def parse_one_pull_request(item):

    return True

+# This array gives the preferred category order, and is also used to
+# normalize category names.
+categories_preferred_order = ['Backward Incompatible Change',
+    'New Feature', 'Bug Fix', 'Improvement', 'Performance Improvement',
+    'Build/Testing/Packaging Improvement', 'Other']

 category_to_pr = collections.defaultdict(lambda: [])
 users = {}
@ -84,6 +90,13 @@ for line in args.file:
        continue

    assert(pr['category'])
+
+    # Normalize category name
+    for c in categories_preferred_order:
+        if fuzzywuzzy.fuzz.ratio(pr['category'], c) >= 90:
+            pr['category'] = c
+            break
+
    category_to_pr[pr['category']].append(pr)
    user_id = pr['user']['id']
    users[user_id] = json.loads(open(f'user{user_id}.json').read())
@ -103,7 +116,6 @@ def print_category(category):
    print()

 # Print categories in preferred order
-categories_preferred_order = ['Backward Incompatible Change', 'New Feature', 'Bug Fix', 'Improvement', 'Performance Improvement', 'Build/Testing/Packaging Improvement', 'Other']
 for category in categories_preferred_order:
    if category in category_to_pr:
        print_category(category)