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# .arcignore is the same as .gitignore but for Arc VCS.
# Arc VCS is a proprietary VCS in Yandex that is very similar to Git
# from the user perspective but with the following differences:
# 1. Data is stored in distributed object storage.
# 2. Local copy works via FUSE without downloading all the objects.
# For this reason, it is better suited for huge monorepositories that can be found in large companies (e.g. Yandex, Google).
# As ClickHouse developers, we don't use Arc as a VCS (we use Git).
# But the ClickHouse source code is also mirrored into internal monorepository and our collegues are using Arc.
# You can read more about Arc here: https://habr.com/en/company/yandex/blog/482926/
# Repository is synchronized without 3rd-party submodules.
contrib

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value: CamelCase
- key: readability-identifier-naming.UsingCase
value: CamelCase
- key: modernize-loop-convert.UseCxx20ReverseRanges
value: false

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.github/ISSUE_TEMPLATE/85_bug-report.md vendored
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> You have to provide the following information whenever possible.
**Describe the bug**
**Describe what's wrong**
> A clear and concise description of what works not as it is supposed to.

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I hereby agree to the terms of the CLA available at: https://yandex.ru/legal/cla/?lang=en
Changelog category (leave one):
- New Feature
- Improvement

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/docs/ja/single.md
/docs/fa/single.md
/docs/en/development/cmake-in-clickhouse.md
/docs/ja/development/cmake-in-clickhouse.md
/docs/zh/development/cmake-in-clickhouse.md
/docs/ru/development/cmake-in-clickhouse.md
# callgrind files
callgrind.out.*

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[submodule "contrib/bzip2"]
path = contrib/bzip2
url = https://github.com/ClickHouse-Extras/bzip2.git
[submodule "contrib/magic_enum"]
path = contrib/magic_enum
url = https://github.com/Neargye/magic_enum
[submodule "contrib/sysroot"]
path = contrib/sysroot
url = https://github.com/ClickHouse-Extras/sysroot.git

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AUTHORS
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To see the list of authors who created the source code of ClickHouse, published and distributed by YANDEX LLC as the owner,
To see the list of authors who created the source code of ClickHouse, published and distributed by ClickHouse, Inc. as the owner,
run "SELECT * FROM system.contributors;" query on any ClickHouse server.

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### ClickHouse release v21.10, 2021-10-14
#### Backward Incompatible Change
* Now the following MergeTree table-level settings: `replicated_max_parallel_sends`, `replicated_max_parallel_sends_for_table`, `replicated_max_parallel_fetches`, `replicated_max_parallel_fetches_for_table` do nothing. They never worked well and were replaced with `max_replicated_fetches_network_bandwidth`, `max_replicated_sends_network_bandwidth` and `background_fetches_pool_size`. [#28404](https://github.com/ClickHouse/ClickHouse/pull/28404) ([alesapin](https://github.com/alesapin)).
#### New Feature
* Add feature for creating user-defined functions (UDF) as lambda expressions. Syntax `CREATE FUNCTION {function_name} as ({parameters}) -> {function core}`. Example `CREATE FUNCTION plus_one as (a) -> a + 1`. Authors @Realist007. [#27796](https://github.com/ClickHouse/ClickHouse/pull/27796) ([Maksim Kita](https://github.com/kitaisreal)) [#23978](https://github.com/ClickHouse/ClickHouse/pull/23978) ([Realist007](https://github.com/Realist007)).
* Added `Executable` storage engine and `executable` table function. It enables data processing with external scripts in streaming fashion. [#28102](https://github.com/ClickHouse/ClickHouse/pull/28102) ([Maksim Kita](https://github.com/kitaisreal)) ([ruct](https://github.com/ruct)).
* Added `ExecutablePool` storage engine. Similar to `Executable` but it's using a pool of long running processes. [#28518](https://github.com/ClickHouse/ClickHouse/pull/28518) ([Maksim Kita](https://github.com/kitaisreal)).
* Add `ALTER TABLE ... MATERIALIZE COLUMN` query. [#27038](https://github.com/ClickHouse/ClickHouse/pull/27038) ([Vladimir Chebotarev](https://github.com/excitoon)).
* Support for partitioned write into `s3` table function. [#23051](https://github.com/ClickHouse/ClickHouse/pull/23051) ([Vladimir Chebotarev](https://github.com/excitoon)).
* Support `lz4` compression format (in addition to `gz`, `bz2`, `xz`, `zstd`) for data import / export. [#25310](https://github.com/ClickHouse/ClickHouse/pull/25310) ([Bharat Nallan](https://github.com/bharatnc)).
* Allow positional arguments under setting `enable_positional_arguments`. Closes [#2592](https://github.com/ClickHouse/ClickHouse/issues/2592). [#27530](https://github.com/ClickHouse/ClickHouse/pull/27530) ([Kseniia Sumarokova](https://github.com/kssenii)).
* Accept user settings related to file formats in `SETTINGS` clause in `CREATE` query for s3 tables. This closes [#27580](https://github.com/ClickHouse/ClickHouse/issues/27580). [#28037](https://github.com/ClickHouse/ClickHouse/pull/28037) ([Nikita Mikhaylov](https://github.com/nikitamikhaylov)).
* Allow SSL connection for `RabbitMQ` engine. [#28365](https://github.com/ClickHouse/ClickHouse/pull/28365) ([Kseniia Sumarokova](https://github.com/kssenii)).
* Add `getServerPort` function to allow getting server port. When the port is not used by the server, throw an exception. [#27900](https://github.com/ClickHouse/ClickHouse/pull/27900) ([Amos Bird](https://github.com/amosbird)).
* Add conversion functions between "snowflake id" and `DateTime`, `DateTime64`. See [#27058](https://github.com/ClickHouse/ClickHouse/issues/27058). [#27704](https://github.com/ClickHouse/ClickHouse/pull/27704) ([jasine](https://github.com/jasine)).
* Add function `SHA512`. [#27830](https://github.com/ClickHouse/ClickHouse/pull/27830) ([zhanglistar](https://github.com/zhanglistar)).
* Add `log_queries_probability` setting that allows user to write to query_log only a sample of queries. Closes [#16609](https://github.com/ClickHouse/ClickHouse/issues/16609). [#27527](https://github.com/ClickHouse/ClickHouse/pull/27527) ([Nikolay Degterinsky](https://github.com/evillique)).
#### Experimental Feature
* `web` type of disks to store readonly tables on web server in form of static files. See [#23982](https://github.com/ClickHouse/ClickHouse/issues/23982). [#25251](https://github.com/ClickHouse/ClickHouse/pull/25251) ([Kseniia Sumarokova](https://github.com/kssenii)). This is mostly needed to faciliate testing of operation on shared storage and for easy importing of datasets. Not recommended to use before release 21.11.
* Added new commands `BACKUP` and `RESTORE`. [#21945](https://github.com/ClickHouse/ClickHouse/pull/21945) ([Vitaly Baranov](https://github.com/vitlibar)). This is under development and not intended to be used in current version.
#### Performance Improvement
* Speed up `sumIf` and `countIf` aggregation functions. [#28272](https://github.com/ClickHouse/ClickHouse/pull/28272) ([Raúl Marín](https://github.com/Algunenano)).
* Create virtual projection for `minmax` indices. Now, when `allow_experimental_projection_optimization` is enabled, queries will use minmax index instead of reading the data when possible. [#26286](https://github.com/ClickHouse/ClickHouse/pull/26286) ([Amos Bird](https://github.com/amosbird)).
* Introducing two checks in `sequenceMatch` and `sequenceCount` that allow for early exit when some deterministic part of the sequence pattern is missing from the events list. This change unlocks many queries that would previously fail due to reaching operations cap, and generally speeds up the pipeline. [#27729](https://github.com/ClickHouse/ClickHouse/pull/27729) ([Jakub Kuklis](https://github.com/jkuklis)).
* Enhance primary key analysis with always monotonic information of binary functions, notably non-zero constant division. [#28302](https://github.com/ClickHouse/ClickHouse/pull/28302) ([Amos Bird](https://github.com/amosbird)).
* Make `hasAll` filter condition leverage bloom filter data-skipping indexes. [#27984](https://github.com/ClickHouse/ClickHouse/pull/27984) ([Braulio Valdivielso Martínez](https://github.com/BraulioVM)).
* Speed up data parts loading by delaying table startup process. [#28313](https://github.com/ClickHouse/ClickHouse/pull/28313) ([Amos Bird](https://github.com/amosbird)).
* Fixed possible excessive number of conditions moved from `WHERE` to `PREWHERE` (optimization controlled by settings `optimize_move_to_prewhere`). [#28139](https://github.com/ClickHouse/ClickHouse/pull/28139) ([lthaooo](https://github.com/lthaooo)).
* Enable `optimize_distributed_group_by_sharding_key` by default. [#28105](https://github.com/ClickHouse/ClickHouse/pull/28105) ([Azat Khuzhin](https://github.com/azat)).
#### Improvement
* Check cluster name before creating `Distributed` table, do not allow to create a table with incorrect cluster name. Fixes [#27832](https://github.com/ClickHouse/ClickHouse/issues/27832). [#27927](https://github.com/ClickHouse/ClickHouse/pull/27927) ([tavplubix](https://github.com/tavplubix)).
* Add aggregate function `quantileBFloat16Weighted` similarly to other quantile...Weighted functions. This closes [#27745](https://github.com/ClickHouse/ClickHouse/issues/27745). [#27758](https://github.com/ClickHouse/ClickHouse/pull/27758) ([Ivan Novitskiy](https://github.com/RedClusive)).
* Allow to create dictionaries with empty attributes list. [#27905](https://github.com/ClickHouse/ClickHouse/pull/27905) ([Maksim Kita](https://github.com/kitaisreal)).
* Add interactive documentation in `clickhouse-client` about how to reset the password. This is useful in scenario when user has installed ClickHouse, set up the password and instantly forget it. See [#27750](https://github.com/ClickHouse/ClickHouse/issues/27750). [#27903](https://github.com/ClickHouse/ClickHouse/pull/27903) ([alexey-milovidov](https://github.com/alexey-milovidov)).
* Support the case when the data is enclosed in array in `JSONAsString` input format. Closes [#25517](https://github.com/ClickHouse/ClickHouse/issues/25517). [#25633](https://github.com/ClickHouse/ClickHouse/pull/25633) ([Kruglov Pavel](https://github.com/Avogar)).
* Add new column `last_queue_update_exception` to `system.replicas` table. [#26843](https://github.com/ClickHouse/ClickHouse/pull/26843) ([nvartolomei](https://github.com/nvartolomei)).
* Support reconnections on failover for `MaterializedPostgreSQL` tables. Closes [#28529](https://github.com/ClickHouse/ClickHouse/issues/28529). [#28614](https://github.com/ClickHouse/ClickHouse/pull/28614) ([Kseniia Sumarokova](https://github.com/kssenii)).
* Generate a unique server UUID on first server start. [#20089](https://github.com/ClickHouse/ClickHouse/pull/20089) ([Bharat Nallan](https://github.com/bharatnc)).
* Introduce `connection_wait_timeout` (default to 5 seconds, 0 - do not wait) setting for `MySQL` engine. [#28474](https://github.com/ClickHouse/ClickHouse/pull/28474) ([Azat Khuzhin](https://github.com/azat)).
* Do not allow creating `MaterializedPostgreSQL` with bad arguments. Closes [#28423](https://github.com/ClickHouse/ClickHouse/issues/28423). [#28430](https://github.com/ClickHouse/ClickHouse/pull/28430) ([Kseniia Sumarokova](https://github.com/kssenii)).
* Use real tmp file instead of predefined "rows_sources" for vertical merges. This avoids generating garbage directories in tmp disks. [#28299](https://github.com/ClickHouse/ClickHouse/pull/28299) ([Amos Bird](https://github.com/amosbird)).
* Added `libhdfs3_conf` in server config instead of export env `LIBHDFS3_CONF` in clickhouse-server.service. This is for configuration of interaction with HDFS. [#28268](https://github.com/ClickHouse/ClickHouse/pull/28268) ([Zhichang Yu](https://github.com/yuzhichang)).
* Fix removing of parts in a Temporary state which can lead to an unexpected exception (`Part %name% doesn't exist`). Fixes [#23661](https://github.com/ClickHouse/ClickHouse/issues/23661). [#28221](https://github.com/ClickHouse/ClickHouse/pull/28221) [#28221](https://github.com/ClickHouse/ClickHouse/issues/28221)) ([Azat Khuzhin](https://github.com/azat)).
* Fix `zookeeper_log.address` (before the first patch in this PR the address was always `::`) and reduce number of calls `getpeername(2)` for this column (since each time entry for `zookeeper_log` is added `getpeername()` is called, cache this address in the zookeeper client to avoid this). [#28212](https://github.com/ClickHouse/ClickHouse/pull/28212) ([Azat Khuzhin](https://github.com/azat)).
* Support implicit conversions between index in operator `[]` and key of type `Map` (e.g. different `Int` types, `String` and `FixedString`). [#28096](https://github.com/ClickHouse/ClickHouse/pull/28096) ([Anton Popov](https://github.com/CurtizJ)).
* Support `ON CONFLICT` clause when inserting into PostgreSQL table engine or table function. Closes [#27727](https://github.com/ClickHouse/ClickHouse/issues/27727). [#28081](https://github.com/ClickHouse/ClickHouse/pull/28081) ([Kseniia Sumarokova](https://github.com/kssenii)).
* Lower restrictions for `Enum` data type to allow attaching compatible data. Closes [#26672](https://github.com/ClickHouse/ClickHouse/issues/26672). [#28028](https://github.com/ClickHouse/ClickHouse/pull/28028) ([Dmitry Novik](https://github.com/novikd)).
* Add a setting `empty_result_for_aggregation_by_constant_keys_on_empty_set` to control the behavior of grouping by constant keys on empty set. This is to bring back the old baviour of [#6842](https://github.com/ClickHouse/ClickHouse/issues/6842). [#27932](https://github.com/ClickHouse/ClickHouse/pull/27932) ([Amos Bird](https://github.com/amosbird)).
* Added `replication_wait_for_inactive_replica_timeout` setting. It allows to specify how long to wait for inactive replicas to execute `ALTER`/`OPTIMZE`/`TRUNCATE` query (default is 120 seconds). If `replication_alter_partitions_sync` is 2 and some replicas are not active for more than `replication_wait_for_inactive_replica_timeout` seconds, then `UNFINISHED` will be thrown. [#27931](https://github.com/ClickHouse/ClickHouse/pull/27931) ([tavplubix](https://github.com/tavplubix)).
* Support lambda argument for `APPLY` column transformer which allows applying functions with more than one argument. This is for [#27877](https://github.com/ClickHouse/ClickHouse/issues/27877). [#27901](https://github.com/ClickHouse/ClickHouse/pull/27901) ([Amos Bird](https://github.com/amosbird)).
* Enable `tcp_keep_alive_timeout` by default. [#27882](https://github.com/ClickHouse/ClickHouse/pull/27882) ([Azat Khuzhin](https://github.com/azat)).
* Improve remote query cancelation (in case of remote server abnormaly terminated). [#27881](https://github.com/ClickHouse/ClickHouse/pull/27881) ([Azat Khuzhin](https://github.com/azat)).
* Use Multipart copy upload for large S3 objects. [#27858](https://github.com/ClickHouse/ClickHouse/pull/27858) ([ianton-ru](https://github.com/ianton-ru)).
* Allow symlink traversal for library dictionaty path. [#27815](https://github.com/ClickHouse/ClickHouse/pull/27815) ([Kseniia Sumarokova](https://github.com/kssenii)).
* Now `ALTER MODIFY COLUM` `T` to `Nullable(T)` doesn't require mutation. [#27787](https://github.com/ClickHouse/ClickHouse/pull/27787) ([victorgao](https://github.com/kafka1991)).
* Don't silently ignore errors and don't count delays in `ReadBufferFromS3`. [#27484](https://github.com/ClickHouse/ClickHouse/pull/27484) ([Vladimir Chebotarev](https://github.com/excitoon)).
* Improve `ALTER ... MATERIALIZE TTL` by recalculating metadata only without actual TTL action. [#27019](https://github.com/ClickHouse/ClickHouse/pull/27019) ([lthaooo](https://github.com/lthaooo)).
* Allow reading the list of custom top level domains without a new line at EOF. [#28213](https://github.com/ClickHouse/ClickHouse/pull/28213) ([Azat Khuzhin](https://github.com/azat)).
#### Bug Fix
* Fix cases, when reading compressed data from `carbon-clickhouse` fails with 'attempt to read after end of file'. Closes [#26149](https://github.com/ClickHouse/ClickHouse/issues/26149). [#28150](https://github.com/ClickHouse/ClickHouse/pull/28150) ([FArthur-cmd](https://github.com/FArthur-cmd)).
* Fix checking access grants when executing `GRANT WITH REPLACE` statement with `ON CLUSTER` clause. This PR improves fix [#27001](https://github.com/ClickHouse/ClickHouse/pull/27701). [#27983](https://github.com/ClickHouse/ClickHouse/pull/27983) ([Vitaly Baranov](https://github.com/vitlibar)).
* Allow selecting with `extremes = 1` from a column of the type `LowCardinality(UUID)`. [#27918](https://github.com/ClickHouse/ClickHouse/pull/27918) ([Vitaly Baranov](https://github.com/vitlibar)).
* Fix PostgreSQL-style cast (`::` operator) with negative numbers. [#27876](https://github.com/ClickHouse/ClickHouse/pull/27876) ([Anton Popov](https://github.com/CurtizJ)).
* After [#26864](https://github.com/ClickHouse/ClickHouse/pull/26864). Fix shutdown of `NamedSessionStorage`: session contexts stored in `NamedSessionStorage` are now destroyed before destroying the global context. [#27875](https://github.com/ClickHouse/ClickHouse/pull/27875) ([Vitaly Baranov](https://github.com/vitlibar)).
* Bugfix for `windowFunnel` "strict" mode. This fixes [#27469](https://github.com/ClickHouse/ClickHouse/issues/27469). [#27563](https://github.com/ClickHouse/ClickHouse/pull/27563) ([achimbab](https://github.com/achimbab)).
* Fix infinite loop while reading truncated `bzip2` archive. [#28543](https://github.com/ClickHouse/ClickHouse/pull/28543) ([Azat Khuzhin](https://github.com/azat)).
* Fix UUID overlap in `DROP TABLE` for internal DDL from `MaterializedMySQL`. MaterializedMySQL is an experimental feature. [#28533](https://github.com/ClickHouse/ClickHouse/pull/28533) ([Azat Khuzhin](https://github.com/azat)).
* Fix `There is no subcolumn` error, while select from tables, which have `Nested` columns and scalar columns with dot in name and the same prefix as `Nested` (e.g. `n.id UInt32, n.arr1 Array(UInt64), n.arr2 Array(UInt64)`). [#28531](https://github.com/ClickHouse/ClickHouse/pull/28531) ([Anton Popov](https://github.com/CurtizJ)).
* Fix bug which can lead to error `Existing table metadata in ZooKeeper differs in sorting key expression.` after ALTER of `ReplicatedVersionedCollapsingMergeTree`. Fixes [#28515](https://github.com/ClickHouse/ClickHouse/issues/28515). [#28528](https://github.com/ClickHouse/ClickHouse/pull/28528) ([alesapin](https://github.com/alesapin)).
* Fixed possible ZooKeeper watches leak (minor issue) on background processing of distributed DDL queue. Closes [#26036](https://github.com/ClickHouse/ClickHouse/issues/26036). [#28446](https://github.com/ClickHouse/ClickHouse/pull/28446) ([tavplubix](https://github.com/tavplubix)).
* Fix missing quoting of table names in `MaterializedPostgreSQL` engine. Closes [#28316](https://github.com/ClickHouse/ClickHouse/issues/28316). [#28433](https://github.com/ClickHouse/ClickHouse/pull/28433) ([Kseniia Sumarokova](https://github.com/kssenii)).
* Fix the wrong behaviour of non joined rows from nullable column. Close [#27691](https://github.com/ClickHouse/ClickHouse/issues/27691). [#28349](https://github.com/ClickHouse/ClickHouse/pull/28349) ([vdimir](https://github.com/vdimir)).
* Fix NOT-IN index optimization when not all key columns are used. This fixes [#28120](https://github.com/ClickHouse/ClickHouse/issues/28120). [#28315](https://github.com/ClickHouse/ClickHouse/pull/28315) ([Amos Bird](https://github.com/amosbird)).
* Fix intersecting parts due to new part had been replaced with an empty part. [#28310](https://github.com/ClickHouse/ClickHouse/pull/28310) ([Azat Khuzhin](https://github.com/azat)).
* Fix inconsistent result in queries with `ORDER BY` and `Merge` tables with enabled setting `optimize_read_in_order`. [#28266](https://github.com/ClickHouse/ClickHouse/pull/28266) ([Anton Popov](https://github.com/CurtizJ)).
* Fix possible read of uninitialized memory for queries with `Nullable(LowCardinality)` type and the setting `extremes` set to 1. Fixes [#28165](https://github.com/ClickHouse/ClickHouse/issues/28165). [#28205](https://github.com/ClickHouse/ClickHouse/pull/28205) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
* Multiple small fixes for projections. See detailed description in the PR. [#28178](https://github.com/ClickHouse/ClickHouse/pull/28178) ([Amos Bird](https://github.com/amosbird)).
* Fix extremely rare segfaults on shutdown due to incorrect order of context/config reloader shutdown. [#28088](https://github.com/ClickHouse/ClickHouse/pull/28088) ([nvartolomei](https://github.com/nvartolomei)).
* Fix handling null value with type of `Nullable(String)` in function `JSONExtract`. This fixes [#27929](https://github.com/ClickHouse/ClickHouse/issues/27929) and [#27930](https://github.com/ClickHouse/ClickHouse/issues/27930). This was introduced in https://github.com/ClickHouse/ClickHouse/pull/25452 . [#27939](https://github.com/ClickHouse/ClickHouse/pull/27939) ([Amos Bird](https://github.com/amosbird)).
* Multiple fixes for the new `clickhouse-keeper` tool. Fix a rare bug in `clickhouse-keeper` when the client can receive a watch response before request-response. [#28197](https://github.com/ClickHouse/ClickHouse/pull/28197) ([alesapin](https://github.com/alesapin)). Fix incorrect behavior in `clickhouse-keeper` when list watches (`getChildren`) triggered with `set` requests for children. [#28190](https://github.com/ClickHouse/ClickHouse/pull/28190) ([alesapin](https://github.com/alesapin)). Fix rare case when changes of `clickhouse-keeper` settings may lead to lost logs and server hung. [#28360](https://github.com/ClickHouse/ClickHouse/pull/28360) ([alesapin](https://github.com/alesapin)). Fix bug in `clickhouse-keeper` which can lead to endless logs when `rotate_logs_interval` decreased. [#28152](https://github.com/ClickHouse/ClickHouse/pull/28152) ([alesapin](https://github.com/alesapin)).
#### Build/Testing/Packaging Improvement
* Enable Thread Fuzzer in Stress Test. Thread Fuzzer is ClickHouse feature that allows to test more permutations of thread scheduling and discover more potential issues. This closes [#9813](https://github.com/ClickHouse/ClickHouse/issues/9813). This closes [#9814](https://github.com/ClickHouse/ClickHouse/issues/9814). This closes [#9515](https://github.com/ClickHouse/ClickHouse/issues/9515). This closes [#9516](https://github.com/ClickHouse/ClickHouse/issues/9516). [#27538](https://github.com/ClickHouse/ClickHouse/pull/27538) ([alexey-milovidov](https://github.com/alexey-milovidov)).
* Add new log level `test` for testing environments. It is even more verbose than the default `trace`. [#28559](https://github.com/ClickHouse/ClickHouse/pull/28559) ([alesapin](https://github.com/alesapin)).
* Print out git status information at CMake configure stage. [#28047](https://github.com/ClickHouse/ClickHouse/pull/28047) ([Braulio Valdivielso Martínez](https://github.com/BraulioVM)).
* Temporarily switched ubuntu apt repository to mirror ru.archive.ubuntu.com as the default one (archive.ubuntu.com) is not responding from our CI. [#28016](https://github.com/ClickHouse/ClickHouse/pull/28016) ([Ilya Yatsishin](https://github.com/qoega)).
### ClickHouse release v21.9, 2021-09-09
#### Backward Incompatible Change
* Do not output trailing zeros in text representation of `Decimal` types. Example: `1.23` will be printed instead of `1.230000` for decimal with scale 6. This closes [#15794](https://github.com/ClickHouse/ClickHouse/issues/15794). It may introduce slight incompatibility if your applications somehow relied on the trailing zeros. Serialization in output formats can be controlled with the setting `output_format_decimal_trailing_zeros`. Implementation of `toString` and casting to String is changed unconditionally. [#27680](https://github.com/ClickHouse/ClickHouse/pull/27680) ([alexey-milovidov](https://github.com/alexey-milovidov)).
* Do not allow to apply parametric aggregate function with `-Merge` combinator to aggregate function state if state was produced by aggregate function with different parameters. For example, state of `fooState(42)(x)` cannot be finalized with `fooMerge(s)` or `fooMerge(123)(s)`, parameters must be specified explicitly like `fooMerge(42)(s)` and must be equal. It does not affect some special aggregate functions like `quantile` and `sequence*` that use parameters for finalization only. [#26847](https://github.com/ClickHouse/ClickHouse/pull/26847) ([tavplubix](https://github.com/tavplubix)).
* Under clickhouse-local, always treat local addresses with a port as remote. [#26736](https://github.com/ClickHouse/ClickHouse/pull/26736) ([Raúl Marín](https://github.com/Algunenano)).
* Fix the issue that in case of some sophisticated query with column aliases identical to the names of expressions, bad cast may happen. This fixes [#25447](https://github.com/ClickHouse/ClickHouse/issues/25447). This fixes [#26914](https://github.com/ClickHouse/ClickHouse/issues/26914). This fix may introduce backward incompatibility: if there are different expressions with identical names, exception will be thrown. It may break some rare cases when `enable_optimize_predicate_expression` is set. [#26639](https://github.com/ClickHouse/ClickHouse/pull/26639) ([alexey-milovidov](https://github.com/alexey-milovidov)).
* Now, scalar subquery always returns `Nullable` result if it's type can be `Nullable`. It is needed because in case of empty subquery it's result should be `Null`. Previously, it was possible to get error about incompatible types (type deduction does not execute scalar subquery, and it could use not-nullable type). Scalar subquery with empty result which can't be converted to `Nullable` (like `Array` or `Tuple`) now throws error. Fixes [#25411](https://github.com/ClickHouse/ClickHouse/issues/25411). [#26423](https://github.com/ClickHouse/ClickHouse/pull/26423) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
* Introduce syntax for here documents. Example `SELECT $doc$ VALUE $doc$`. [#26671](https://github.com/ClickHouse/ClickHouse/pull/26671) ([Maksim Kita](https://github.com/kitaisreal)). This change is backward incompatible if in query there are identifiers that contain `$` [#28768](https://github.com/ClickHouse/ClickHouse/issues/28768).
* Now indices can handle Nullable types, including `isNull` and `isNotNull`. [#12433](https://github.com/ClickHouse/ClickHouse/pull/12433) and [#12455](https://github.com/ClickHouse/ClickHouse/pull/12455) ([Amos Bird](https://github.com/amosbird)) and [#27250](https://github.com/ClickHouse/ClickHouse/pull/27250) ([Azat Khuzhin](https://github.com/azat)). But this was done with on-disk format changes, and even though new server can read old data, old server cannot. Also, in case you have `MINMAX` data skipping indices, you may get `Data after mutation/merge is not byte-identical` error, since new index will have `.idx2` extension while before it was `.idx`. That said, that you should not delay updating all existing replicas, in this case, otherwise, if old replica (<21.9) will download data from new replica with 21.9+ it will not be able to apply index for downloaded part.
#### New Feature
* Implementation of short circuit function evaluation, closes [#12587](https://github.com/ClickHouse/ClickHouse/issues/12587). Add settings `short_circuit_function_evaluation` to configure short circuit function evaluation. [#23367](https://github.com/ClickHouse/ClickHouse/pull/23367) ([Kruglov Pavel](https://github.com/Avogar)).
* Add support for INTERSECT, EXCEPT, ANY, ALL operators. [#24757](https://github.com/ClickHouse/ClickHouse/pull/24757) ([Kirill Ershov](https://github.com/zdikov)). ([Kseniia Sumarokova](https://github.com/kssenii)).
* Add support for encryption at the virtual file system level (data encryption at rest) using AES-CTR algorithm. [#24206](https://github.com/ClickHouse/ClickHouse/pull/24206) ([Latysheva Alexandra](https://github.com/alexelex)). ([Vitaly Baranov](https://github.com/vitlibar)) [#26733](https://github.com/ClickHouse/ClickHouse/pull/26733) [#26377](https://github.com/ClickHouse/ClickHouse/pull/26377) [#26465](https://github.com/ClickHouse/ClickHouse/pull/26465).
* Added natural language processing (NLP) functions for tokenization, stemming, lemmatizing and search in synonyms extensions. [#24997](https://github.com/ClickHouse/ClickHouse/pull/24997) ([Nikolay Degterinsky](https://github.com/evillique)).
* Added integration with S2 geometry library. [#24980](https://github.com/ClickHouse/ClickHouse/pull/24980) ([Andr0901](https://github.com/Andr0901)). ([Nikita Mikhaylov](https://github.com/nikitamikhaylov)).
* Add SQLite table engine, table function, database engine. [#24194](https://github.com/ClickHouse/ClickHouse/pull/24194) ([Arslan Gumerov](https://github.com/g-arslan)). ([Kseniia Sumarokova](https://github.com/kssenii)).
* Added support for custom query for `MySQL`, `PostgreSQL`, `ClickHouse`, `JDBC`, `Cassandra` dictionary source. Closes [#1270](https://github.com/ClickHouse/ClickHouse/issues/1270). [#26995](https://github.com/ClickHouse/ClickHouse/pull/26995) ([Maksim Kita](https://github.com/kitaisreal)).
* Add shared (replicated) storage of user, roles, row policies, quotas and settings profiles through ZooKeeper. [#27426](https://github.com/ClickHouse/ClickHouse/pull/27426) ([Kevin Michel](https://github.com/kmichel-aiven)).
* Add compression for `INTO OUTFILE` that automatically choose compression algorithm. Closes [#3473](https://github.com/ClickHouse/ClickHouse/issues/3473). [#27134](https://github.com/ClickHouse/ClickHouse/pull/27134) ([Filatenkov Artur](https://github.com/FArthur-cmd)).
* Add `INSERT ... FROM INFILE` similarly to `SELECT ... INTO OUTFILE`. [#27655](https://github.com/ClickHouse/ClickHouse/pull/27655) ([Filatenkov Artur](https://github.com/FArthur-cmd)).
* Added `complex_key_range_hashed` dictionary. Closes [#22029](https://github.com/ClickHouse/ClickHouse/issues/22029). [#27629](https://github.com/ClickHouse/ClickHouse/pull/27629) ([Maksim Kita](https://github.com/kitaisreal)).
* Support expressions in JOIN ON section. Close [#21868](https://github.com/ClickHouse/ClickHouse/issues/21868). [#24420](https://github.com/ClickHouse/ClickHouse/pull/24420) ([Vladimir C](https://github.com/vdimir)).
* When client connects to server, it receives information about all warnings that are already were collected by server. (It can be disabled by using option `--no-warnings`). Add `system.warnings` table to collect warnings about server configuration. [#26246](https://github.com/ClickHouse/ClickHouse/pull/26246) ([Filatenkov Artur](https://github.com/FArthur-cmd)). [#26282](https://github.com/ClickHouse/ClickHouse/pull/26282) ([Filatenkov Artur](https://github.com/FArthur-cmd)).
* Allow using constant expressions from with and select in aggregate function parameters. Close [#10945](https://github.com/ClickHouse/ClickHouse/issues/10945). [#27531](https://github.com/ClickHouse/ClickHouse/pull/27531) ([abel-cheng](https://github.com/abel-cheng)).
* Add `tupleToNameValuePairs`, a function that turns a named tuple into an array of pairs. [#27505](https://github.com/ClickHouse/ClickHouse/pull/27505) ([Braulio Valdivielso Martínez](https://github.com/BraulioVM)).
* Add support for `bzip2` compression method for import/export. Closes [#22428](https://github.com/ClickHouse/ClickHouse/issues/22428). [#27377](https://github.com/ClickHouse/ClickHouse/pull/27377) ([Nikolay Degterinsky](https://github.com/evillique)).
* Added `bitmapSubsetOffsetLimit(bitmap, offset, cardinality_limit)` function. It creates a subset of bitmap limit the results to `cardinality_limit` with offset of `offset`. [#27234](https://github.com/ClickHouse/ClickHouse/pull/27234) ([DHBin](https://github.com/DHBin)).
* Add column `default_database` to `system.users`. [#27054](https://github.com/ClickHouse/ClickHouse/pull/27054) ([kevin wan](https://github.com/MaxWk)).
* Supported `cluster` macros inside table functions 'cluster' and 'clusterAllReplicas'. [#26913](https://github.com/ClickHouse/ClickHouse/pull/26913) ([polyprogrammist](https://github.com/PolyProgrammist)).
* Add new functions `currentRoles()`, `enabledRoles()`, `defaultRoles()`. [#26780](https://github.com/ClickHouse/ClickHouse/pull/26780) ([Vitaly Baranov](https://github.com/vitlibar)).
* New functions `currentProfiles()`, `enabledProfiles()`, `defaultProfiles()`. [#26714](https://github.com/ClickHouse/ClickHouse/pull/26714) ([Vitaly Baranov](https://github.com/vitlibar)).
* Add functions that return (initial_)query_id of the current query. This closes [#23682](https://github.com/ClickHouse/ClickHouse/issues/23682). [#26410](https://github.com/ClickHouse/ClickHouse/pull/26410) ([Alexey Boykov](https://github.com/mathalex)).
* Add `REPLACE GRANT` feature. [#26384](https://github.com/ClickHouse/ClickHouse/pull/26384) ([Caspian](https://github.com/Cas-pian)).
* `EXPLAIN` query now has `EXPLAIN ESTIMATE ...` mode that will show information about read rows, marks and parts from MergeTree tables. Closes [#23941](https://github.com/ClickHouse/ClickHouse/issues/23941). [#26131](https://github.com/ClickHouse/ClickHouse/pull/26131) ([fastio](https://github.com/fastio)).
* Added `system.zookeeper_log` table. All actions of ZooKeeper client are logged into this table. Implements [#25449](https://github.com/ClickHouse/ClickHouse/issues/25449). [#26129](https://github.com/ClickHouse/ClickHouse/pull/26129) ([tavplubix](https://github.com/tavplubix)).
* Zero-copy replication for `ReplicatedMergeTree` over `HDFS` storage. [#25918](https://github.com/ClickHouse/ClickHouse/pull/25918) ([Zhichang Yu](https://github.com/yuzhichang)).
* Allow to insert Nested type as array of structs in `Arrow`, `ORC` and `Parquet` input format. [#25902](https://github.com/ClickHouse/ClickHouse/pull/25902) ([Kruglov Pavel](https://github.com/Avogar)).
* Add a new datatype `Date32` (store data as Int32), support date range same with `DateTime64` support load parquet date32 to ClickHouse `Date32` Add new function `toDate32` like `toDate`. [#25774](https://github.com/ClickHouse/ClickHouse/pull/25774) ([LiuNeng](https://github.com/liuneng1994)).
* Allow setting default database for users. [#25268](https://github.com/ClickHouse/ClickHouse/issues/25268). [#25687](https://github.com/ClickHouse/ClickHouse/pull/25687) ([kevin wan](https://github.com/MaxWk)).
* Add an optional parameter to `MongoDB` engine to accept connection string options and support SSL connection. Closes [#21189](https://github.com/ClickHouse/ClickHouse/issues/21189). Closes [#21041](https://github.com/ClickHouse/ClickHouse/issues/21041). [#22045](https://github.com/ClickHouse/ClickHouse/pull/22045) ([Omar Bazaraa](https://github.com/OmarBazaraa)).
#### Experimental Feature
* Added a compression codec `AES_128_GCM_SIV` which encrypts columns instead of compressing them. [#19896](https://github.com/ClickHouse/ClickHouse/pull/19896) ([PHO](https://github.com/depressed-pho)). Will be rewritten, do not use.
* Rename `MaterializeMySQL` to `MaterializedMySQL`. [#26822](https://github.com/ClickHouse/ClickHouse/pull/26822) ([tavplubix](https://github.com/tavplubix)).
#### Performance Improvement
* Improve the performance of fast queries when `max_execution_time = 0` by reducing the number of `clock_gettime` system calls. [#27325](https://github.com/ClickHouse/ClickHouse/pull/27325) ([filimonov](https://github.com/filimonov)).
* Specialize date time related comparison to achieve better performance. This fixes [#27083](https://github.com/ClickHouse/ClickHouse/issues/27083) . [#27122](https://github.com/ClickHouse/ClickHouse/pull/27122) ([Amos Bird](https://github.com/amosbird)).
* Share file descriptors in concurrent reads of the same files. There is no noticeable performance difference on Linux. But the number of opened files will be significantly (10..100 times) lower on typical servers and it makes operations easier. See [#26214](https://github.com/ClickHouse/ClickHouse/issues/26214). [#26768](https://github.com/ClickHouse/ClickHouse/pull/26768) ([alexey-milovidov](https://github.com/alexey-milovidov)).
* Improve latency of short queries, that require reading from tables with large number of columns. [#26371](https://github.com/ClickHouse/ClickHouse/pull/26371) ([Anton Popov](https://github.com/CurtizJ)).
* Don't build sets for indices when analyzing a query. [#26365](https://github.com/ClickHouse/ClickHouse/pull/26365) ([Raúl Marín](https://github.com/Algunenano)).
* Vectorize the SUM of Nullable integer types with native representation ([David Manzanares](https://github.com/davidmanzanares), [Raúl Marín](https://github.com/Algunenano)). [#26248](https://github.com/ClickHouse/ClickHouse/pull/26248) ([Raúl Marín](https://github.com/Algunenano)).
* Compile expressions involving columns with `Enum` types. [#26237](https://github.com/ClickHouse/ClickHouse/pull/26237) ([Maksim Kita](https://github.com/kitaisreal)).
* Compile aggregate functions `groupBitOr`, `groupBitAnd`, `groupBitXor`. [#26161](https://github.com/ClickHouse/ClickHouse/pull/26161) ([Maksim Kita](https://github.com/kitaisreal)).
* Improved memory usage with better block size prediction when reading empty DEFAULT columns. Closes [#17317](https://github.com/ClickHouse/ClickHouse/issues/17317). [#25917](https://github.com/ClickHouse/ClickHouse/pull/25917) ([Vladimir Chebotarev](https://github.com/excitoon)).
* Reduce memory usage and number of read rows in queries with `ORDER BY primary_key`. [#25721](https://github.com/ClickHouse/ClickHouse/pull/25721) ([Anton Popov](https://github.com/CurtizJ)).
* Enable `distributed_push_down_limit` by default. [#27104](https://github.com/ClickHouse/ClickHouse/pull/27104) ([Azat Khuzhin](https://github.com/azat)).
* Make `toTimeZone` monotonicity when timeZone is a constant value to support partition puring when use sql like:. [#26261](https://github.com/ClickHouse/ClickHouse/pull/26261) ([huangzhaowei](https://github.com/SaintBacchus)).
#### Improvement
* Mark window functions as ready for general use. Remove the `allow_experimental_window_functions` setting. [#27184](https://github.com/ClickHouse/ClickHouse/pull/27184) ([Alexander Kuzmenkov](https://github.com/akuzm)).
* Improve compatibility with non-whole-minute timezone offsets. [#27080](https://github.com/ClickHouse/ClickHouse/pull/27080) ([Raúl Marín](https://github.com/Algunenano)).
* If file descriptor in `File` table is regular file - allow to read multiple times from it. It allows `clickhouse-local` to read multiple times from stdin (with multiple SELECT queries or subqueries) if stdin is a regular file like `clickhouse-local --query "SELECT * FROM table UNION ALL SELECT * FROM table" ... < file`. This closes [#11124](https://github.com/ClickHouse/ClickHouse/issues/11124). Co-authored with ([alexey-milovidov](https://github.com/alexey-milovidov)). [#25960](https://github.com/ClickHouse/ClickHouse/pull/25960) ([BoloniniD](https://github.com/BoloniniD)).
* Remove duplicate index analysis and avoid possible invalid limit checks during projection analysis. [#27742](https://github.com/ClickHouse/ClickHouse/pull/27742) ([Amos Bird](https://github.com/amosbird)).
* Enable query parameters to be passed in the body of HTTP requests. [#27706](https://github.com/ClickHouse/ClickHouse/pull/27706) ([Hermano Lustosa](https://github.com/hllustosa)).
* Disallow `arrayJoin` on partition expressions. [#27648](https://github.com/ClickHouse/ClickHouse/pull/27648) ([Raúl Marín](https://github.com/Algunenano)).
* Log client IP address if authentication fails. [#27514](https://github.com/ClickHouse/ClickHouse/pull/27514) ([Misko Lee](https://github.com/imiskolee)).
* Use bytes instead of strings for binary data in the GRPC protocol. [#27431](https://github.com/ClickHouse/ClickHouse/pull/27431) ([Vitaly Baranov](https://github.com/vitlibar)).
* Send response with error message if HTTP port is not set and user tries to send HTTP request to TCP port. [#27385](https://github.com/ClickHouse/ClickHouse/pull/27385) ([Braulio Valdivielso Martínez](https://github.com/BraulioVM)).
* Add `_CAST` function for internal usage, which will not preserve type nullability, but non-internal cast will preserve according to setting `cast_keep_nullable`. Closes [#12636](https://github.com/ClickHouse/ClickHouse/issues/12636). [#27382](https://github.com/ClickHouse/ClickHouse/pull/27382) ([Kseniia Sumarokova](https://github.com/kssenii)).
* Add setting `log_formatted_queries` to log additional formatted query into `system.query_log`. It's useful for normalized query analysis because functions like `normalizeQuery` and `normalizeQueryKeepNames` don't parse/format queries in order to achieve better performance. [#27380](https://github.com/ClickHouse/ClickHouse/pull/27380) ([Amos Bird](https://github.com/amosbird)).
* Add two settings `max_hyperscan_regexp_length` and `max_hyperscan_regexp_total_length` to prevent huge regexp being used in hyperscan related functions, such as `multiMatchAny`. [#27378](https://github.com/ClickHouse/ClickHouse/pull/27378) ([Amos Bird](https://github.com/amosbird)).
* Memory consumed by bitmap aggregate functions now is taken into account for memory limits. This closes [#26555](https://github.com/ClickHouse/ClickHouse/issues/26555). [#27252](https://github.com/ClickHouse/ClickHouse/pull/27252) ([alexey-milovidov](https://github.com/alexey-milovidov)).
* Add 10 seconds cache for S3 proxy resolver. [#27216](https://github.com/ClickHouse/ClickHouse/pull/27216) ([ianton-ru](https://github.com/ianton-ru)).
* Split global mutex into individual regexp construction. This helps avoid huge regexp construction blocking other related threads. [#27211](https://github.com/ClickHouse/ClickHouse/pull/27211) ([Amos Bird](https://github.com/amosbird)).
* Support schema for PostgreSQL database engine. Closes [#27166](https://github.com/ClickHouse/ClickHouse/issues/27166). [#27198](https://github.com/ClickHouse/ClickHouse/pull/27198) ([Kseniia Sumarokova](https://github.com/kssenii)).
* Track memory usage in clickhouse-client. [#27191](https://github.com/ClickHouse/ClickHouse/pull/27191) ([Filatenkov Artur](https://github.com/FArthur-cmd)).
* Try recording `query_kind` in `system.query_log` even when query fails to start. [#27182](https://github.com/ClickHouse/ClickHouse/pull/27182) ([Amos Bird](https://github.com/amosbird)).
* Added columns `replica_is_active` that maps replica name to is replica active status to table `system.replicas`. Closes [#27138](https://github.com/ClickHouse/ClickHouse/issues/27138). [#27180](https://github.com/ClickHouse/ClickHouse/pull/27180) ([Maksim Kita](https://github.com/kitaisreal)).
* Allow to pass query settings via server URI in Web UI. [#27177](https://github.com/ClickHouse/ClickHouse/pull/27177) ([kolsys](https://github.com/kolsys)).
* Add a new metric called `MaxPushedDDLEntryID` which is the maximum ddl entry id that current node push to zookeeper. [#27174](https://github.com/ClickHouse/ClickHouse/pull/27174) ([Fuwang Hu](https://github.com/fuwhu)).
* Improved the existence condition judgment and empty string node judgment when `clickhouse-keeper` creates znode. [#27125](https://github.com/ClickHouse/ClickHouse/pull/27125) ([小路](https://github.com/nicelulu)).
* Merge JOIN correctly handles empty set in the right. [#27078](https://github.com/ClickHouse/ClickHouse/pull/27078) ([Vladimir C](https://github.com/vdimir)).
* Now functions can be shard-level constants, which means if it's executed in the context of some distributed table, it generates a normal column, otherwise it produces a constant value. Notable functions are: `hostName()`, `tcpPort()`, `version()`, `buildId()`, `uptime()`, etc. [#27020](https://github.com/ClickHouse/ClickHouse/pull/27020) ([Amos Bird](https://github.com/amosbird)).
* Updated `extractAllGroupsHorizontal` - upper limit on the number of matches per row can be set via optional third argument. [#26961](https://github.com/ClickHouse/ClickHouse/pull/26961) ([Vasily Nemkov](https://github.com/Enmk)).
* Expose `RocksDB` statistics via system.rocksdb table. Read rocksdb options from ClickHouse config (`rocksdb...` keys). NOTE: ClickHouse does not rely on RocksDB, it is just one of the additional integration storage engines. [#26821](https://github.com/ClickHouse/ClickHouse/pull/26821) ([Azat Khuzhin](https://github.com/azat)).
* Less verbose internal RocksDB logs. NOTE: ClickHouse does not rely on RocksDB, it is just one of the additional integration storage engines. This closes [#26252](https://github.com/ClickHouse/ClickHouse/issues/26252). [#26789](https://github.com/ClickHouse/ClickHouse/pull/26789) ([alexey-milovidov](https://github.com/alexey-milovidov)).
* Changing default roles affects new sessions only. [#26759](https://github.com/ClickHouse/ClickHouse/pull/26759) ([Vitaly Baranov](https://github.com/vitlibar)).
* Watchdog is disabled in docker by default. Fix for not handling ctrl+c. [#26757](https://github.com/ClickHouse/ClickHouse/pull/26757) ([Mikhail f. Shiryaev](https://github.com/Felixoid)).
* `SET PROFILE` now applies constraints too if they're set for a passed profile. [#26730](https://github.com/ClickHouse/ClickHouse/pull/26730) ([Vitaly Baranov](https://github.com/vitlibar)).
* Improve handling of `KILL QUERY` requests. [#26675](https://github.com/ClickHouse/ClickHouse/pull/26675) ([Raúl Marín](https://github.com/Algunenano)).
* `mapPopulatesSeries` function supports `Map` type. [#26663](https://github.com/ClickHouse/ClickHouse/pull/26663) ([Ildus Kurbangaliev](https://github.com/ildus)).
* Fix excessive (x2) connect attempts with `skip_unavailable_shards`. [#26658](https://github.com/ClickHouse/ClickHouse/pull/26658) ([Azat Khuzhin](https://github.com/azat)).
* Avoid hanging `clickhouse-benchmark` if connection fails (i.e. on EMFILE). [#26656](https://github.com/ClickHouse/ClickHouse/pull/26656) ([Azat Khuzhin](https://github.com/azat)).
* Allow more threads to be used by the Kafka engine. [#26642](https://github.com/ClickHouse/ClickHouse/pull/26642) ([feihengye](https://github.com/feihengye)).
* Add round-robin support for `clickhouse-benchmark` (it does not differ from the regular multi host/port run except for statistics report). [#26607](https://github.com/ClickHouse/ClickHouse/pull/26607) ([Azat Khuzhin](https://github.com/azat)).
* Executable dictionaries (`executable`, `executable_pool`) enable creation with DDL query using `clickhouse-local`. Closes [#22355](https://github.com/ClickHouse/ClickHouse/issues/22355). [#26510](https://github.com/ClickHouse/ClickHouse/pull/26510) ([Maksim Kita](https://github.com/kitaisreal)).
* Set client query kind for `mysql` and `postgresql` compatibility protocol handlers. [#26498](https://github.com/ClickHouse/ClickHouse/pull/26498) ([anneji-dev](https://github.com/anneji-dev)).
* Apply `LIMIT` on the shards for queries like `SELECT * FROM dist ORDER BY key LIMIT 10` w/ `distributed_push_down_limit=1`. Avoid running `Distinct`/`LIMIT BY` steps for queries like `SELECT DISTINCT shading_key FROM dist ORDER BY key`. Now `distributed_push_down_limit` is respected by `optimize_distributed_group_by_sharding_key` optimization. [#26466](https://github.com/ClickHouse/ClickHouse/pull/26466) ([Azat Khuzhin](https://github.com/azat)).
* Updated protobuf to 3.17.3. Changelogs are available on https://github.com/protocolbuffers/protobuf/releases. [#26424](https://github.com/ClickHouse/ClickHouse/pull/26424) ([Ilya Yatsishin](https://github.com/qoega)).
* Enable `use_hedged_requests` setting that allows to mitigate tail latencies on large clusters. [#26380](https://github.com/ClickHouse/ClickHouse/pull/26380) ([alexey-milovidov](https://github.com/alexey-milovidov)).
* Improve behaviour with non-existing host in user allowed host list. [#26368](https://github.com/ClickHouse/ClickHouse/pull/26368) ([ianton-ru](https://github.com/ianton-ru)).
* Add ability to set `Distributed` directory monitor settings via CREATE TABLE (i.e. `CREATE TABLE dist (key Int) Engine=Distributed(cluster, db, table) SETTINGS monitor_batch_inserts=1` and similar). [#26336](https://github.com/ClickHouse/ClickHouse/pull/26336) ([Azat Khuzhin](https://github.com/azat)).
* Save server address in history URLs in web UI if it differs from the origin of web UI. This closes [#26044](https://github.com/ClickHouse/ClickHouse/issues/26044). [#26322](https://github.com/ClickHouse/ClickHouse/pull/26322) ([alexey-milovidov](https://github.com/alexey-milovidov)).
* Add events to profile calls to `sleep` / `sleepEachRow`. [#26320](https://github.com/ClickHouse/ClickHouse/pull/26320) ([Raúl Marín](https://github.com/Algunenano)).
* Allow to reuse connections of shards among different clusters. It also avoids creating new connections when using `cluster` table function. [#26318](https://github.com/ClickHouse/ClickHouse/pull/26318) ([Amos Bird](https://github.com/amosbird)).
* Control the execution period of clear old temporary directories by parameter with default value. [#26212](https://github.com/ClickHouse/ClickHouse/issues/26212). [#26313](https://github.com/ClickHouse/ClickHouse/pull/26313) ([fastio](https://github.com/fastio)).
* Add a setting `function_range_max_elements_in_block` to tune the safety threshold for data volume generated by function `range`. This closes [#26303](https://github.com/ClickHouse/ClickHouse/issues/26303). [#26305](https://github.com/ClickHouse/ClickHouse/pull/26305) ([alexey-milovidov](https://github.com/alexey-milovidov)).
* Check hash function at table creation, not at sampling. Add settings for MergeTree, if someone create a table with incorrect sampling column but sampling never be used, disable this settings for starting the server without exception. [#26256](https://github.com/ClickHouse/ClickHouse/pull/26256) ([zhaoyu](https://github.com/zxc111)).
* Added `output_format_avro_string_column_pattern` setting to put specified String columns to Avro as string instead of default bytes. Implements [#22414](https://github.com/ClickHouse/ClickHouse/issues/22414). [#26245](https://github.com/ClickHouse/ClickHouse/pull/26245) ([Ilya Golshtein](https://github.com/ilejn)).
* Add information about column sizes in `system.columns` table for `Log` and `TinyLog` tables. This closes [#9001](https://github.com/ClickHouse/ClickHouse/issues/9001). [#26241](https://github.com/ClickHouse/ClickHouse/pull/26241) ([Nikolay Degterinsky](https://github.com/evillique)).
* Don't throw exception when querying `system.detached_parts` table if there is custom disk configuration and `detached` directory does not exist on some disks. This closes [#26078](https://github.com/ClickHouse/ClickHouse/issues/26078). [#26236](https://github.com/ClickHouse/ClickHouse/pull/26236) ([alexey-milovidov](https://github.com/alexey-milovidov)).
* Check for non-deterministic functions in keys, including constant expressions like `now()`, `today()`. This closes [#25875](https://github.com/ClickHouse/ClickHouse/issues/25875). This closes [#11333](https://github.com/ClickHouse/ClickHouse/issues/11333). [#26235](https://github.com/ClickHouse/ClickHouse/pull/26235) ([alexey-milovidov](https://github.com/alexey-milovidov)).
* convert timestamp and timestamptz data types to `DateTime64` in PostgreSQL table engine. [#26234](https://github.com/ClickHouse/ClickHouse/pull/26234) ([jasine](https://github.com/jasine)).
* Apply aggressive IN index analysis for projections so that better projection candidate can be selected. [#26218](https://github.com/ClickHouse/ClickHouse/pull/26218) ([Amos Bird](https://github.com/amosbird)).
* Remove GLOBAL keyword for IN when scalar function is passed. In previous versions, if user specified `GLOBAL IN f(x)` exception was thrown. [#26217](https://github.com/ClickHouse/ClickHouse/pull/26217) ([Amos Bird](https://github.com/amosbird)).
* Add error id (like `BAD_ARGUMENTS`) to exception messages. This closes [#25862](https://github.com/ClickHouse/ClickHouse/issues/25862). [#26172](https://github.com/ClickHouse/ClickHouse/pull/26172) ([alexey-milovidov](https://github.com/alexey-milovidov)).
* Fix incorrect output with --progress option for clickhouse-local. Progress bar will be cleared once it gets to 100% - same as it is done for clickhouse-client. Closes [#17484](https://github.com/ClickHouse/ClickHouse/issues/17484). [#26128](https://github.com/ClickHouse/ClickHouse/pull/26128) ([Kseniia Sumarokova](https://github.com/kssenii)).
* Add `merge_selecting_sleep_ms` setting. [#26120](https://github.com/ClickHouse/ClickHouse/pull/26120) ([lthaooo](https://github.com/lthaooo)).
* Remove complicated usage of Linux AIO with one block readahead and replace it with plain simple synchronous IO with O_DIRECT. In previous versions, the setting `min_bytes_to_use_direct_io` may not work correctly if `max_threads` is greater than one. Reading with direct IO (that is disabled by default for queries and enabled by default for large merges) will work in less efficient way. This closes [#25997](https://github.com/ClickHouse/ClickHouse/issues/25997). [#26003](https://github.com/ClickHouse/ClickHouse/pull/26003) ([alexey-milovidov](https://github.com/alexey-milovidov)).
* Flush `Distributed` table on `REPLACE TABLE` query. Resolves [#24566](https://github.com/ClickHouse/ClickHouse/issues/24566) - Do not replace (or create) table on `[CREATE OR] REPLACE TABLE ... AS SELECT` query if insertion into new table fails. Resolves [#23175](https://github.com/ClickHouse/ClickHouse/issues/23175). [#25895](https://github.com/ClickHouse/ClickHouse/pull/25895) ([tavplubix](https://github.com/tavplubix)).
* Add `views` column to system.query_log containing the names of the (materialized or live) views executed by the query. Adds a new log table (`system.query_views_log`) that contains information about each view executed during a query. Modifies view execution: When an exception is thrown while executing a view, any view that has already startedwill continue running until it finishes. This used to be the behaviour under parallel_view_processing=true and now it's always the same behaviour. - Dependent views now report reading progress to the context. [#25714](https://github.com/ClickHouse/ClickHouse/pull/25714) ([Raúl Marín](https://github.com/Algunenano)).
* Do connection draining asynchonously upon finishing executing distributed queries. A new server setting is added `max_threads_for_connection_collector` which specifies the number of workers to recycle connections in background. If the pool is full, connection will be drained synchronously but a bit different than before: It's drained after we send EOS to client, query will succeed immediately after receiving enough data, and any exception will be logged instead of throwing to the client. Added setting `drain_timeout` (3 seconds by default). Connection draining will disconnect upon timeout. [#25674](https://github.com/ClickHouse/ClickHouse/pull/25674) ([Amos Bird](https://github.com/amosbird)).
* Support for multiple includes in configuration. It is possible to include users configuration, remote servers configuration from multiple sources. Simply place `<include />` element with `from_zk`, `from_env` or `incl` attribute and it will be replaced with the substitution. [#24404](https://github.com/ClickHouse/ClickHouse/pull/24404) ([nvartolomei](https://github.com/nvartolomei)).
* Fix multiple block insertion into distributed table with `insert_distributed_one_random_shard = 1`. This is a marginal feature. Mark as improvement. [#23140](https://github.com/ClickHouse/ClickHouse/pull/23140) ([Amos Bird](https://github.com/amosbird)).
* Support `LowCardinality` and `FixedString` keys/values for `Map` type. [#21543](https://github.com/ClickHouse/ClickHouse/pull/21543) ([hexiaoting](https://github.com/hexiaoting)).
* Enable reloading of local disk config. [#19526](https://github.com/ClickHouse/ClickHouse/pull/19526) ([taiyang-li](https://github.com/taiyang-li)).
#### Bug Fix
* Fix a couple of bugs that may cause replicas to diverge. [#27808](https://github.com/ClickHouse/ClickHouse/pull/27808) ([tavplubix](https://github.com/tavplubix)).
* Fix a rare bug in `DROP PART` which can lead to the error `Unexpected merged part intersects drop range`. [#27807](https://github.com/ClickHouse/ClickHouse/pull/27807) ([alesapin](https://github.com/alesapin)).
* Prevent crashes for some formats when NULL (tombstone) message was coming from Kafka. Closes [#19255](https://github.com/ClickHouse/ClickHouse/issues/19255). [#27794](https://github.com/ClickHouse/ClickHouse/pull/27794) ([filimonov](https://github.com/filimonov)).
* Fix column filtering with union distinct in subquery. Closes [#27578](https://github.com/ClickHouse/ClickHouse/issues/27578). [#27689](https://github.com/ClickHouse/ClickHouse/pull/27689) ([Kseniia Sumarokova](https://github.com/kssenii)).
* Fix bad type cast when functions like `arrayHas` are applied to arrays of LowCardinality of Nullable of different non-numeric types like `DateTime` and `DateTime64`. In previous versions bad cast occurs. In new version it will lead to exception. This closes [#26330](https://github.com/ClickHouse/ClickHouse/issues/26330). [#27682](https://github.com/ClickHouse/ClickHouse/pull/27682) ([alexey-milovidov](https://github.com/alexey-milovidov)).
* Fix postgresql table function resulting in non-closing connections. Closes [#26088](https://github.com/ClickHouse/ClickHouse/issues/26088). [#27662](https://github.com/ClickHouse/ClickHouse/pull/27662) ([Kseniia Sumarokova](https://github.com/kssenii)).
* Fixed another case of `Unexpected merged part ... intersecting drop range ...` error. [#27656](https://github.com/ClickHouse/ClickHouse/pull/27656) ([tavplubix](https://github.com/tavplubix)).
* Fix an error with aliased column in `Distributed` table. [#27652](https://github.com/ClickHouse/ClickHouse/pull/27652) ([Vladimir C](https://github.com/vdimir)).
* After setting `max_memory_usage*` to non-zero value it was not possible to reset it back to 0 (unlimited). It's fixed. [#27638](https://github.com/ClickHouse/ClickHouse/pull/27638) ([tavplubix](https://github.com/tavplubix)).
* Fixed underflow of the time value when constructing it from components. Closes [#27193](https://github.com/ClickHouse/ClickHouse/issues/27193). [#27605](https://github.com/ClickHouse/ClickHouse/pull/27605) ([Vasily Nemkov](https://github.com/Enmk)).
* Fix crash during projection materialization when some parts contain missing columns. This fixes [#27512](https://github.com/ClickHouse/ClickHouse/issues/27512). [#27528](https://github.com/ClickHouse/ClickHouse/pull/27528) ([Amos Bird](https://github.com/amosbird)).
* fix metric `BackgroundMessageBrokerSchedulePoolTask`, maybe mistyped. [#27452](https://github.com/ClickHouse/ClickHouse/pull/27452) ([Ben](https://github.com/benbiti)).
* Fix distributed queries with zero shards and aggregation. [#27427](https://github.com/ClickHouse/ClickHouse/pull/27427) ([Azat Khuzhin](https://github.com/azat)).
* Compatibility when `/proc/meminfo` does not contain KB suffix. [#27361](https://github.com/ClickHouse/ClickHouse/pull/27361) ([Mike Kot](https://github.com/myrrc)).
* Fix incorrect result for query with row-level security, PREWHERE and LowCardinality filter. Fixes [#27179](https://github.com/ClickHouse/ClickHouse/issues/27179). [#27329](https://github.com/ClickHouse/ClickHouse/pull/27329) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
* Fixed incorrect validation of partition id for MergeTree tables that created with old syntax. [#27328](https://github.com/ClickHouse/ClickHouse/pull/27328) ([tavplubix](https://github.com/tavplubix)).
* Fix MySQL protocol when using parallel formats (CSV / TSV). [#27326](https://github.com/ClickHouse/ClickHouse/pull/27326) ([Raúl Marín](https://github.com/Algunenano)).
* Fix `Cannot find column` error for queries with sampling. Was introduced in [#24574](https://github.com/ClickHouse/ClickHouse/issues/24574). Fixes [#26522](https://github.com/ClickHouse/ClickHouse/issues/26522). [#27301](https://github.com/ClickHouse/ClickHouse/pull/27301) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
* Fix errors like `Expected ColumnLowCardinality, gotUInt8` or `Bad cast from type DB::ColumnVector<char8_t> to DB::ColumnLowCardinality` for some queries with `LowCardinality` in `PREWHERE`. And more importantly, fix the lack of whitespace in the error message. Fixes [#23515](https://github.com/ClickHouse/ClickHouse/issues/23515). [#27298](https://github.com/ClickHouse/ClickHouse/pull/27298) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
* Fix `distributed_group_by_no_merge = 2` with `distributed_push_down_limit = 1` or `optimize_distributed_group_by_sharding_key = 1` with `LIMIT BY` and `LIMIT OFFSET`. [#27249](https://github.com/ClickHouse/ClickHouse/pull/27249) ([Azat Khuzhin](https://github.com/azat)). These are obscure combination of settings that no one is using.
* Fix mutation stuck on invalid partitions in non-replicated MergeTree. [#27248](https://github.com/ClickHouse/ClickHouse/pull/27248) ([Azat Khuzhin](https://github.com/azat)).
* In case of ambiguity, lambda functions prefer its arguments to other aliases or identifiers. [#27235](https://github.com/ClickHouse/ClickHouse/pull/27235) ([Raúl Marín](https://github.com/Algunenano)).
* Fix column structure in merge join, close [#27091](https://github.com/ClickHouse/ClickHouse/issues/27091). [#27217](https://github.com/ClickHouse/ClickHouse/pull/27217) ([Vladimir C](https://github.com/vdimir)).
* In rare cases `system.detached_parts` table might contain incorrect information for some parts, it's fixed. Fixes [#27114](https://github.com/ClickHouse/ClickHouse/issues/27114). [#27183](https://github.com/ClickHouse/ClickHouse/pull/27183) ([tavplubix](https://github.com/tavplubix)).
* Fix uninitialized memory in functions `multiSearch*` with empty array, close [#27169](https://github.com/ClickHouse/ClickHouse/issues/27169). [#27181](https://github.com/ClickHouse/ClickHouse/pull/27181) ([Vladimir C](https://github.com/vdimir)).
* Fix synchronization in GRPCServer. This PR fixes [#27024](https://github.com/ClickHouse/ClickHouse/issues/27024). [#27064](https://github.com/ClickHouse/ClickHouse/pull/27064) ([Vitaly Baranov](https://github.com/vitlibar)).
* Fixed `cache`, `complex_key_cache`, `ssd_cache`, `complex_key_ssd_cache` configuration parsing. Options `allow_read_expired_keys`, `max_update_queue_size`, `update_queue_push_timeout_milliseconds`, `query_wait_timeout_milliseconds` were not parsed for dictionaries with non `cache` type. [#27032](https://github.com/ClickHouse/ClickHouse/pull/27032) ([Maksim Kita](https://github.com/kitaisreal)).
* Fix possible mutation stack due to race with DROP_RANGE. [#27002](https://github.com/ClickHouse/ClickHouse/pull/27002) ([Azat Khuzhin](https://github.com/azat)).
* Now partition ID in queries like `ALTER TABLE ... PARTITION ID xxx` validates for correctness. Fixes [#25718](https://github.com/ClickHouse/ClickHouse/issues/25718). [#26963](https://github.com/ClickHouse/ClickHouse/pull/26963) ([alesapin](https://github.com/alesapin)).
* Fix "Unknown column name" error with multiple JOINs in some cases, close [#26899](https://github.com/ClickHouse/ClickHouse/issues/26899). [#26957](https://github.com/ClickHouse/ClickHouse/pull/26957) ([Vladimir C](https://github.com/vdimir)).
* Fix reading of custom TLDs (stops processing with lower buffer or bigger file). [#26948](https://github.com/ClickHouse/ClickHouse/pull/26948) ([Azat Khuzhin](https://github.com/azat)).
* Fix error `Missing columns: 'xxx'` when `DEFAULT` column references other non materialized column without `DEFAULT` expression. Fixes [#26591](https://github.com/ClickHouse/ClickHouse/issues/26591). [#26900](https://github.com/ClickHouse/ClickHouse/pull/26900) ([alesapin](https://github.com/alesapin)).
* Fix loading of dictionary keys in `library-bridge` for `library` dictionary source. [#26834](https://github.com/ClickHouse/ClickHouse/pull/26834) ([Kseniia Sumarokova](https://github.com/kssenii)).
* Aggregate function parameters might be lost when applying some combinators causing exceptions like `Conversion from AggregateFunction(topKArray, Array(String)) to AggregateFunction(topKArray(10), Array(String)) is not supported`. It's fixed. Fixes [#26196](https://github.com/ClickHouse/ClickHouse/issues/26196) and [#26433](https://github.com/ClickHouse/ClickHouse/issues/26433). [#26814](https://github.com/ClickHouse/ClickHouse/pull/26814) ([tavplubix](https://github.com/tavplubix)).
* Add `event_time_microseconds` value for `REMOVE_PART` in `system.part_log`. In previous versions is was not set. [#26720](https://github.com/ClickHouse/ClickHouse/pull/26720) ([Azat Khuzhin](https://github.com/azat)).
* Do not remove data on ReplicatedMergeTree table shutdown to avoid creating data to metadata inconsistency. [#26716](https://github.com/ClickHouse/ClickHouse/pull/26716) ([nvartolomei](https://github.com/nvartolomei)).
* Sometimes `SET ROLE` could work incorrectly, this PR fixes that. [#26707](https://github.com/ClickHouse/ClickHouse/pull/26707) ([Vitaly Baranov](https://github.com/vitlibar)).
* Some fixes for parallel formatting (https://github.com/ClickHouse/ClickHouse/issues/26694). [#26703](https://github.com/ClickHouse/ClickHouse/pull/26703) ([Raúl Marín](https://github.com/Algunenano)).
* Fix potential nullptr dereference in window functions. This fixes [#25276](https://github.com/ClickHouse/ClickHouse/issues/25276). [#26668](https://github.com/ClickHouse/ClickHouse/pull/26668) ([Alexander Kuzmenkov](https://github.com/akuzm)).
* Fix clickhouse-client history file conversion (when upgrading from the format of 3 years old version of clickhouse-client) if file is empty. [#26589](https://github.com/ClickHouse/ClickHouse/pull/26589) ([Azat Khuzhin](https://github.com/azat)).
* Fix incorrect function names of groupBitmapAnd/Or/Xor (can be displayed in some occasions). This fixes. [#26557](https://github.com/ClickHouse/ClickHouse/pull/26557) ([Amos Bird](https://github.com/amosbird)).
* Update `chown` cmd check in clickhouse-server docker entrypoint. It fixes the bug that cluster pod restart failed (or timeout) on kubernetes. [#26545](https://github.com/ClickHouse/ClickHouse/pull/26545) ([Ky Li](https://github.com/Kylinrix)).
* Fix crash in `RabbitMQ` shutdown in case `RabbitMQ` setup was not started. Closes [#26504](https://github.com/ClickHouse/ClickHouse/issues/26504). [#26529](https://github.com/ClickHouse/ClickHouse/pull/26529) ([Kseniia Sumarokova](https://github.com/kssenii)).
* Fix issues with `CREATE DICTIONARY` query if dictionary name or database name was quoted. Closes [#26491](https://github.com/ClickHouse/ClickHouse/issues/26491). [#26508](https://github.com/ClickHouse/ClickHouse/pull/26508) ([Maksim Kita](https://github.com/kitaisreal)).
* Fix broken column name resolution after rewriting column aliases. This fixes [#26432](https://github.com/ClickHouse/ClickHouse/issues/26432). [#26475](https://github.com/ClickHouse/ClickHouse/pull/26475) ([Amos Bird](https://github.com/amosbird)).
* Fix some fuzzed msan crash. Fixes [#22517](https://github.com/ClickHouse/ClickHouse/issues/22517). [#26428](https://github.com/ClickHouse/ClickHouse/pull/26428) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
* Fix infinite non joined block stream in `partial_merge_join` close [#26325](https://github.com/ClickHouse/ClickHouse/issues/26325). [#26374](https://github.com/ClickHouse/ClickHouse/pull/26374) ([Vladimir C](https://github.com/vdimir)).
* Fix possible crash when login as dropped user. This PR fixes [#26073](https://github.com/ClickHouse/ClickHouse/issues/26073). [#26363](https://github.com/ClickHouse/ClickHouse/pull/26363) ([Vitaly Baranov](https://github.com/vitlibar)).
* Fix `optimize_distributed_group_by_sharding_key` for multiple columns (leads to incorrect result w/ `optimize_skip_unused_shards=1`/`allow_nondeterministic_optimize_skip_unused_shards=1` and multiple columns in sharding key expression). [#26353](https://github.com/ClickHouse/ClickHouse/pull/26353) ([Azat Khuzhin](https://github.com/azat)).
* Fixed rare bug in lost replica recovery that may cause replicas to diverge. [#26321](https://github.com/ClickHouse/ClickHouse/pull/26321) ([tavplubix](https://github.com/tavplubix)).
* Fix zstd decompression (for import/export in zstd framing format that is unrelated to tables data) in case there are escape sequences at the end of internal buffer. Closes [#26013](https://github.com/ClickHouse/ClickHouse/issues/26013). [#26314](https://github.com/ClickHouse/ClickHouse/pull/26314) ([Kseniia Sumarokova](https://github.com/kssenii)).
* Fix logical error on join with totals, close [#26017](https://github.com/ClickHouse/ClickHouse/issues/26017). [#26250](https://github.com/ClickHouse/ClickHouse/pull/26250) ([Vladimir C](https://github.com/vdimir)).
* Remove excessive newline in `thread_name` column in `system.stack_trace` table. This fixes [#24124](https://github.com/ClickHouse/ClickHouse/issues/24124). [#26210](https://github.com/ClickHouse/ClickHouse/pull/26210) ([alexey-milovidov](https://github.com/alexey-milovidov)).
* Fix potential crash if more than one `untuple` expression is used. [#26179](https://github.com/ClickHouse/ClickHouse/pull/26179) ([alexey-milovidov](https://github.com/alexey-milovidov)).
* Don't throw exception in `toString` for Nullable Enum if Enum does not have a value for zero, close [#25806](https://github.com/ClickHouse/ClickHouse/issues/25806). [#26123](https://github.com/ClickHouse/ClickHouse/pull/26123) ([Vladimir C](https://github.com/vdimir)).
* Fixed incorrect `sequence_id` in MySQL protocol packets that ClickHouse sends on exception during query execution. It might cause MySQL client to reset connection to ClickHouse server. Fixes [#21184](https://github.com/ClickHouse/ClickHouse/issues/21184). [#26051](https://github.com/ClickHouse/ClickHouse/pull/26051) ([tavplubix](https://github.com/tavplubix)).
* Fix for the case that `cutToFirstSignificantSubdomainCustom()`/`cutToFirstSignificantSubdomainCustomWithWWW()`/`firstSignificantSubdomainCustom()` returns incorrect type for consts, and hence `optimize_skip_unused_shards` does not work:. [#26041](https://github.com/ClickHouse/ClickHouse/pull/26041) ([Azat Khuzhin](https://github.com/azat)).
* Fix possible mismatched header when using normal projection with prewhere. This fixes [#26020](https://github.com/ClickHouse/ClickHouse/issues/26020). [#26038](https://github.com/ClickHouse/ClickHouse/pull/26038) ([Amos Bird](https://github.com/amosbird)).
* Fix sharding_key from column w/o function for remote() (before `select * from remote('127.1', system.one, dummy)` leads to `Unknown column: dummy, there are only columns .` error). [#25824](https://github.com/ClickHouse/ClickHouse/pull/25824) ([Azat Khuzhin](https://github.com/azat)).
* Fixed `Not found column ...` and `Missing column ...` errors when selecting from `MaterializeMySQL`. Fixes [#23708](https://github.com/ClickHouse/ClickHouse/issues/23708), [#24830](https://github.com/ClickHouse/ClickHouse/issues/24830), [#25794](https://github.com/ClickHouse/ClickHouse/issues/25794). [#25822](https://github.com/ClickHouse/ClickHouse/pull/25822) ([tavplubix](https://github.com/tavplubix)).
* Fix `optimize_skip_unused_shards_rewrite_in` for non-UInt64 types (may select incorrect shards eventually or throw `Cannot infer type of an empty tuple` or `Function tuple requires at least one argument`). [#25798](https://github.com/ClickHouse/ClickHouse/pull/25798) ([Azat Khuzhin](https://github.com/azat)).
#### Build/Testing/Packaging Improvement
* Now we ran stateful and stateless tests in random timezones. Fixes [#12439](https://github.com/ClickHouse/ClickHouse/issues/12439). Reading String as DateTime and writing DateTime as String in Protobuf format now respect timezone. Reading UInt16 as DateTime in Arrow and Parquet formats now treat it as Date and then converts to DateTime with respect to DateTime's timezone, because Date is serialized in Arrow and Parquet as UInt16. GraphiteMergeTree now respect time zone for rounding of times. Fixes [#5098](https://github.com/ClickHouse/ClickHouse/issues/5098). Author: @alexey-milovidov. [#15408](https://github.com/ClickHouse/ClickHouse/pull/15408) ([alesapin](https://github.com/alesapin)).
* `clickhouse-test` supports SQL tests with [Jinja2](https://jinja.palletsprojects.com/en/3.0.x/templates/#synopsis) templates. [#26579](https://github.com/ClickHouse/ClickHouse/pull/26579) ([Vladimir C](https://github.com/vdimir)).
* Add support for build with `clang-13`. This closes [#27705](https://github.com/ClickHouse/ClickHouse/issues/27705). [#27714](https://github.com/ClickHouse/ClickHouse/pull/27714) ([alexey-milovidov](https://github.com/alexey-milovidov)). [#27777](https://github.com/ClickHouse/ClickHouse/pull/27777) ([Sergei Semin](https://github.com/syominsergey))
* Add CMake options to build with or without specific CPU instruction set. This is for [#17469](https://github.com/ClickHouse/ClickHouse/issues/17469) and [#27509](https://github.com/ClickHouse/ClickHouse/issues/27509). [#27508](https://github.com/ClickHouse/ClickHouse/pull/27508) ([alexey-milovidov](https://github.com/alexey-milovidov)).
* Fix linking of auxiliar programs when using dynamic libraries. [#26958](https://github.com/ClickHouse/ClickHouse/pull/26958) ([Raúl Marín](https://github.com/Algunenano)).
* Update RocksDB to `2021-07-16` master. [#26411](https://github.com/ClickHouse/ClickHouse/pull/26411) ([alexey-milovidov](https://github.com/alexey-milovidov)).
### ClickHouse release v21.8, 2021-08-12
#### Upgrade Notes
@ -1145,7 +1456,7 @@
* Export current max ddl entry executed by DDLWorker via server metric. It's useful to check if DDLWorker hangs somewhere. [#17464](https://github.com/ClickHouse/ClickHouse/pull/17464) ([Amos Bird](https://github.com/amosbird)).
* Export asynchronous metrics of all servers current threads. It's useful to track down issues like [this](https://github.com/ClickHouse-Extras/poco/pull/28). [#17463](https://github.com/ClickHouse/ClickHouse/pull/17463) ([Amos Bird](https://github.com/amosbird)).
* Include dynamic columns like MATERIALIZED / ALIAS for wildcard query when settings `asterisk_include_materialized_columns` and `asterisk_include_alias_columns` are turned on. [#17462](https://github.com/ClickHouse/ClickHouse/pull/17462) ([Ken Chen](https://github.com/chenziliang)).
* Allow specifying [TTL](https://clickhouse.tech/docs/en/engines/table-engines/mergetree-family/mergetree/#mergetree-table-ttl) to remove old entries from [system log tables](https://clickhouse.tech/docs/en/operations/system-tables/), using the `<ttl>` attribute in `config.xml`. [#17438](https://github.com/ClickHouse/ClickHouse/pull/17438) ([Du Chuan](https://github.com/spongedu)).
* Allow specifying [TTL](https://clickhouse.com/docs/en/engines/table-engines/mergetree-family/mergetree/#mergetree-table-ttl) to remove old entries from [system log tables](https://clickhouse.com/docs/en/operations/system-tables/), using the `<ttl>` attribute in `config.xml`. [#17438](https://github.com/ClickHouse/ClickHouse/pull/17438) ([Du Chuan](https://github.com/spongedu)).
* Now queries coming to the server via MySQL and PostgreSQL protocols have distinctive interface types (which can be seen in the `interface` column of the table`system.query_log`): `4` for MySQL, and `5` for PostgreSQL, instead of formerly used `1` which is now used for the native protocol only. [#17437](https://github.com/ClickHouse/ClickHouse/pull/17437) ([Vitaly Baranov](https://github.com/vitlibar)).
* Fix parsing of SETTINGS clause of the `INSERT ... SELECT ... SETTINGS` query. [#17414](https://github.com/ClickHouse/ClickHouse/pull/17414) ([Azat Khuzhin](https://github.com/azat)).
* Correctly account memory in RadixSort. [#17412](https://github.com/ClickHouse/ClickHouse/pull/17412) ([Nikita Mikhaylov](https://github.com/nikitamikhaylov)).

54
CMakeLists.txt
View File

@ -1,4 +1,4 @@
cmake_minimum_required(VERSION 3.3)
cmake_minimum_required(VERSION 3.14)
foreach(policy
CMP0023
@ -45,6 +45,7 @@ include (cmake/arch.cmake)
include (cmake/target.cmake)
include (cmake/tools.cmake)
include (cmake/analysis.cmake)
include (cmake/git_status.cmake)
# Ignore export() since we don't use it,
# but it gets broken with a global targets via link_libraries()
@ -79,16 +80,16 @@ include (cmake/find/ccache.cmake)
# ccache ignore it.
option(ENABLE_CHECK_HEAVY_BUILDS "Don't allow C++ translation units to compile too long or to take too much memory while compiling." OFF)
if (ENABLE_CHECK_HEAVY_BUILDS)
# set DATA (since RSS does not work since 2.6.x+) to 2G
# set DATA (since RSS does not work since 2.6.x+) to 5G
set (RLIMIT_DATA 5000000000)
# set VIRT (RLIMIT_AS) to 10G (DATA*10)
set (RLIMIT_AS 10000000000)
# set CPU time limit to 600 seconds
set (RLIMIT_CPU 600)
# set CPU time limit to 1000 seconds
set (RLIMIT_CPU 1000)
# gcc10/gcc10/clang -fsanitize=memory is too heavy
if (SANITIZE STREQUAL "memory" OR COMPILER_GCC)
set (RLIMIT_DATA 10000000000)
set (RLIMIT_DATA 10000000000) # 10G
endif()
set (CMAKE_CXX_COMPILER_LAUNCHER prlimit --as=${RLIMIT_AS} --data=${RLIMIT_DATA} --cpu=${RLIMIT_CPU} ${CMAKE_CXX_COMPILER_LAUNCHER})
@ -126,13 +127,15 @@ if (USE_STATIC_LIBRARIES)
list(REVERSE CMAKE_FIND_LIBRARY_SUFFIXES)
endif ()
# Implies ${WITH_COVERAGE}
option (ENABLE_FUZZING "Fuzzy testing using libfuzzer" OFF)
if (ENABLE_FUZZING)
# Also set WITH_COVERAGE=1 for better fuzzing process
# By default this is disabled, because fuzzers are built in CI with the clickhouse itself.
# And we don't want to enable coverage for it.
message (STATUS "Fuzzing instrumentation enabled")
set (WITH_COVERAGE ON)
set (FUZZER "libfuzzer")
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -nostdlib++")
endif()
# Global libraries
@ -150,6 +153,7 @@ if (CMAKE_GENERATOR STREQUAL "Ninja" AND NOT DISABLE_COLORED_BUILD)
set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fdiagnostics-color=always")
endif ()
include (cmake/check_flags.cmake)
include (cmake/add_warning.cmake)
if (NOT MSVC)
@ -163,6 +167,21 @@ if (COMPILER_CLANG)
if (NOT CMAKE_BUILD_TYPE_UC STREQUAL "RELEASE")
set(COMPILER_FLAGS "${COMPILER_FLAGS} -gdwarf-aranges")
endif ()
if (HAS_USE_CTOR_HOMING)
# For more info see https://blog.llvm.org/posts/2021-04-05-constructor-homing-for-debug-info/
if (CMAKE_BUILD_TYPE_UC STREQUAL "DEBUG" OR CMAKE_BUILD_TYPE_UC STREQUAL "RELWITHDEBINFO")
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Xclang -fuse-ctor-homing")
set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Xclang -fuse-ctor-homing")
endif()
endif()
endif ()
# If compiler has support for -Wreserved-identifier. It is difficult to detect by clang version,
# because there are two different branches of clang: clang and AppleClang.
# (AppleClang is not supported by ClickHouse, but some developers have misfortune to use it).
if (HAS_RESERVED_IDENTIFIER)
add_compile_definitions (HAS_RESERVED_IDENTIFIER)
endif ()
# If turned `ON`, assumes the user has either the system GTest library or the bundled one.
@ -176,6 +195,14 @@ elseif(GLIBC_COMPATIBILITY)
message (${RECONFIGURE_MESSAGE_LEVEL} "Glibc compatibility cannot be enabled in current configuration")
endif ()
if (GLIBC_COMPATIBILITY)
# NOTE: we may also want to check glibc version and add -include only for 2.32+
# however this is extra complexity, especially for cross compiling.
# And anyway it should not break anything for <2.32.
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -include ${CMAKE_CURRENT_SOURCE_DIR}/base/glibc-compatibility/glibc-compat-2.32.h")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -include ${CMAKE_CURRENT_SOURCE_DIR}/base/glibc-compatibility/glibc-compat-2.32.h")
endif()
if (NOT CMAKE_VERSION VERSION_GREATER "3.9.0")
message (WARNING "CMake version must be greater than 3.9.0 for production builds.")
endif ()
@ -183,7 +210,7 @@ endif ()
# Make sure the final executable has symbols exported
set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -rdynamic")
find_program (OBJCOPY_PATH NAMES "llvm-objcopy" "llvm-objcopy-12" "llvm-objcopy-11" "llvm-objcopy-10" "llvm-objcopy-9" "llvm-objcopy-8" "objcopy")
find_program (OBJCOPY_PATH NAMES "llvm-objcopy" "llvm-objcopy-13" "llvm-objcopy-12" "llvm-objcopy-11" "llvm-objcopy-10" "llvm-objcopy-9" "llvm-objcopy-8" "objcopy")
if (NOT OBJCOPY_PATH AND OS_DARWIN)
find_program (BREW_PATH NAMES "brew")
@ -309,6 +336,10 @@ if (COMPILER_GCC OR COMPILER_CLANG)
set(COMPILER_FLAGS "${COMPILER_FLAGS} -falign-functions=32")
endif ()
if (COMPILER_GCC)
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fcoroutines")
endif ()
# Compiler-specific coverage flags e.g. -fcoverage-mapping for gcc
option(WITH_COVERAGE "Profile the resulting binary/binaries" OFF)
@ -370,7 +401,7 @@ if (COMPILER_CLANG)
endif ()
# Always prefer llvm tools when using clang. For instance, we cannot use GNU ar when llvm LTO is enabled
find_program (LLVM_AR_PATH NAMES "llvm-ar" "llvm-ar-12" "llvm-ar-11" "llvm-ar-10" "llvm-ar-9" "llvm-ar-8")
find_program (LLVM_AR_PATH NAMES "llvm-ar" "llvm-ar-13" "llvm-ar-12" "llvm-ar-11" "llvm-ar-10" "llvm-ar-9" "llvm-ar-8")
if (LLVM_AR_PATH)
message(STATUS "Using llvm-ar: ${LLVM_AR_PATH}.")
@ -379,7 +410,7 @@ if (COMPILER_CLANG)
message(WARNING "Cannot find llvm-ar. System ar will be used instead. It does not work with ThinLTO.")
endif ()
find_program (LLVM_RANLIB_PATH NAMES "llvm-ranlib" "llvm-ranlib-12" "llvm-ranlib-11" "llvm-ranlib-10" "llvm-ranlib-9" "llvm-ranlib-8")
find_program (LLVM_RANLIB_PATH NAMES "llvm-ranlib" "llvm-ranlib-13" "llvm-ranlib-12" "llvm-ranlib-11" "llvm-ranlib-10" "llvm-ranlib-9" "llvm-ranlib-8")
if (LLVM_RANLIB_PATH)
message(STATUS "Using llvm-ranlib: ${LLVM_RANLIB_PATH}.")
@ -620,9 +651,6 @@ include_directories(${ConfigIncludePath})
# Add as many warnings as possible for our own code.
include (cmake/warnings.cmake)
# Check if needed compiler flags are supported
include (cmake/check_flags.cmake)
add_subdirectory (base)
add_subdirectory (src)
add_subdirectory (programs)

34
CONTRIBUTING.md
View File

@ -6,38 +6,6 @@ Thank you.
## Technical Info
We have a [developer's guide](https://clickhouse.yandex/docs/en/development/developer_instruction/) for writing code for ClickHouse. Besides this guide, you can find [Overview of ClickHouse Architecture](https://clickhouse.yandex/docs/en/development/architecture/) and instructions on how to build ClickHouse in different environments.
We have a [developer's guide](https://clickhouse.com/docs/en/development/developer_instruction/) for writing code for ClickHouse. Besides this guide, you can find [Overview of ClickHouse Architecture](https://clickhouse.com/docs/en/development/architecture/) and instructions on how to build ClickHouse in different environments.
If you want to contribute to documentation, read the [Contributing to ClickHouse Documentation](docs/README.md) guide.
## Legal Info
In order for us (YANDEX LLC) to accept patches and other contributions from you, you may adopt our Yandex Contributor License Agreement (the "**CLA**"). The current version of the CLA you may find here:
1) https://yandex.ru/legal/cla/?lang=en (in English) and
2) https://yandex.ru/legal/cla/?lang=ru (in Russian).
By adopting the CLA, you state the following:
* You obviously wish and are willingly licensing your contributions to us for our open source projects under the terms of the CLA,
* You have read the terms and conditions of the CLA and agree with them in full,
* You are legally able to provide and license your contributions as stated,
* We may use your contributions for our open source projects and for any other our project too,
* We rely on your assurances concerning the rights of third parties in relation to your contributions.
If you agree with these principles, please read and adopt our CLA. By providing us your contributions, you hereby declare that you have already read and adopt our CLA, and we may freely merge your contributions with our corresponding open source project and use it in further in accordance with terms and conditions of the CLA.
If you have already adopted terms and conditions of the CLA, you are able to provide your contributes. When you submit your pull request, please add the following information into it:
```
I hereby agree to the terms of the CLA available at: [link].
```
Replace the bracketed text as follows:
* [link] is the link at the current version of the CLA (you may add here a link https://yandex.ru/legal/cla/?lang=en (in English) or a link https://yandex.ru/legal/cla/?lang=ru (in Russian).
It is enough to provide us such notification once.
As an alternative, you can provide DCO instead of CLA. You can find the text of DCO here: https://developercertificate.org/
It is enough to read and copy it verbatim to your pull request.
If you don't agree with the CLA and don't want to provide DCO, you still can open a pull request to provide your contributions.

4
LICENSE
View File

@ -1,4 +1,4 @@
Copyright 2016-2021 Yandex LLC
Copyright 2016-2021 ClickHouse, Inc.
Apache License
Version 2.0, January 2004
@ -188,7 +188,7 @@ Copyright 2016-2021 Yandex LLC
same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright 2016-2021 Yandex LLC
Copyright 2016-2021 ClickHouse, Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.

22
README.md
View File

@ -1,18 +1,14 @@
[![ClickHouse — open source distributed column-oriented DBMS](https://github.com/ClickHouse/ClickHouse/raw/master/website/images/logo-400x240.png)](https://clickhouse.tech)
[![ClickHouse — open source distributed column-oriented DBMS](https://github.com/ClickHouse/ClickHouse/raw/master/website/images/logo-400x240.png)](https://clickhouse.com)
ClickHouse® is an open-source column-oriented database management system that allows generating analytical data reports in real time.
ClickHouse® is an open-source column-oriented database management system that allows generating analytical data reports in real-time.
## Useful Links
* [Official website](https://clickhouse.tech/) has quick high-level overview of ClickHouse on main page.
* [Tutorial](https://clickhouse.tech/docs/en/getting_started/tutorial/) shows how to set up and query small ClickHouse cluster.
* [Documentation](https://clickhouse.tech/docs/en/) provides more in-depth information.
* [Official website](https://clickhouse.com/) has a quick high-level overview of ClickHouse on the main page.
* [Tutorial](https://clickhouse.com/docs/en/getting_started/tutorial/) shows how to set up and query a small ClickHouse cluster.
* [Documentation](https://clickhouse.com/docs/en/) provides more in-depth information.
* [YouTube channel](https://www.youtube.com/c/ClickHouseDB) has a lot of content about ClickHouse in video format.
* [Slack](https://join.slack.com/t/clickhousedb/shared_invite/zt-rxm3rdrk-lIUmhLC3V8WTaL0TGxsOmg) and [Telegram](https://telegram.me/clickhouse_en) allow to chat with ClickHouse users in real-time.
* [Blog](https://clickhouse.yandex/blog/en/) contains various ClickHouse-related articles, as well as announcements and reports about events.
* [Code Browser](https://clickhouse.tech/codebrowser/html_report/ClickHouse/index.html) with syntax highlight and navigation.
* [Contacts](https://clickhouse.tech/#contacts) can help to get your questions answered if there are any.
* You can also [fill this form](https://clickhouse.tech/#meet) to meet Yandex ClickHouse team in person.
## Upcoming Events
* [SF Bay Area ClickHouse August Community Meetup (online)](https://www.meetup.com/San-Francisco-Bay-Area-ClickHouse-Meetup/events/279109379/) on 25 August 2021.
* [Slack](https://join.slack.com/t/clickhousedb/shared_invite/zt-rxm3rdrk-lIUmhLC3V8WTaL0TGxsOmg) and [Telegram](https://telegram.me/clickhouse_en) allow chatting with ClickHouse users in real-time.
* [Blog](https://clickhouse.com/blog/en/) contains various ClickHouse-related articles, as well as announcements and reports about events.
* [Code Browser](https://clickhouse.com/codebrowser/html_report/ClickHouse/index.html) with syntax highlight and navigation.
* [Contacts](https://clickhouse.com/company/#contact) can help to get your questions answered if there are any.

56
SECURITY.md
View File

@ -1,28 +1,52 @@
# Security Policy
## Supported Versions
## Security Announcements
Security fixes will be announced by posting them in the [security changelog](https://clickhouse.com/docs/en/whats-new/security-changelog/).
The following versions of ClickHouse server are
currently being supported with security updates:
## Scope and Supported Versions
The following versions of ClickHouse server are currently being supported with security updates:
| Version | Supported |
| ------- | ------------------ |
| 1.x | :x: |
| 18.x | :x: |
| 19.x | :x: |
| 20.1 | :x: |
| 20.3 | :white_check_mark: |
| 20.4 | :x: |
| 20.5 | :x: |
| 20.6 | :x: |
| 20.7 | :x: |
| 20.8 | :white_check_mark: |
| 20.9 | :x: |
| 20.10 | :x: |
| 20.11 | :white_check_mark: |
| 20.12 | :white_check_mark: |
| 21.1 | :white_check_mark: |
| 20.x | :x: |
| 21.1 | :x: |
| 21.2 | :x: |
| 21.3 | ✅ |
| 21.4 | :x: |
| 21.5 | :x: |
| 21.6 | :x: |
| 21.7 | ✅ |
| 21.8 | ✅ |
| 21.9 | ✅ |
## Reporting a Vulnerability
To report a potential vulnerability in ClickHouse please send the details about it to [clickhouse-feedback@yandex-team.com](mailto:clickhouse-feedback@yandex-team.com).
We're extremely grateful for security researchers and users that report vulnerabilities to the ClickHouse Open Source Community. All reports are thoroughly investigated by developers.
To report a potential vulnerability in ClickHouse please send the details about it to [security@clickhouse.com](mailto:security@clickhouse.com).
### When Should I Report a Vulnerability?
- You think you discovered a potential security vulnerability in ClickHouse
- You are unsure how a vulnerability affects ClickHouse
### When Should I NOT Report a Vulnerability?
- You need help tuning ClickHouse components for security
- You need help applying security related updates
- Your issue is not security related
## Security Vulnerability Response
Each report is acknowledged and analyzed by ClickHouse maintainers within 5 working days.
As the security issue moves from triage, to identified fix, to release planning we will keep the reporter updated.
## Public Disclosure Timing
A public disclosure date is negotiated by the ClickHouse maintainers and the bug submitter. We prefer to fully disclose the bug as soon as possible once a user mitigation is available. It is reasonable to delay disclosure when the bug or the fix is not yet fully understood, the solution is not well-tested, or for vendor coordination. The timeframe for disclosure is from immediate (especially if it's already publicly known) to 90 days. For a vulnerability with a straightforward mitigation, we expect report date to disclosure date to be on the order of 7 days.

2
base/CMakeLists.txt
View File

@ -2,7 +2,7 @@ if (USE_CLANG_TIDY)
set (CMAKE_CXX_CLANG_TIDY "${CLANG_TIDY_PATH}")
endif ()
add_subdirectory (common)
add_subdirectory (base)
add_subdirectory (daemon)
add_subdirectory (loggers)
add_subdirectory (pcg-random)

12
base/common/BorrowedObjectPool.h → base/base/BorrowedObjectPool.h
View File

@ -6,8 +6,8 @@
#include <mutex>
#include <condition_variable>
#include <common/defines.h>
#include <common/MoveOrCopyIfThrow.h>
#include <base/defines.h>
#include <base/MoveOrCopyIfThrow.h>
/** Pool for limited size objects that cannot be used from different threads simultaneously.
* The main use case is to have fixed size of objects that can be reused in difference threads during their lifetime
@ -88,10 +88,12 @@ public:
/// Return object into pool. Client must return same object that was borrowed.
inline void returnObject(T && object_to_return)
{
std::unique_lock<std::mutex> lck(objects_mutex);
{
std::lock_guard<std::mutex> lock(objects_mutex);
objects.emplace_back(std::move(object_to_return));
--borrowed_objects_size;
objects.emplace_back(std::move(object_to_return));
--borrowed_objects_size;
}
condition_variable.notify_one();
}

3
base/common/CMakeLists.txt → base/base/CMakeLists.txt
View File

@ -29,7 +29,7 @@ elseif (ENABLE_READLINE)
endif ()
if (USE_DEBUG_HELPERS)
set (INCLUDE_DEBUG_HELPERS "-include \"${ClickHouse_SOURCE_DIR}/base/common/iostream_debug_helpers.h\"")
set (INCLUDE_DEBUG_HELPERS "-include \"${ClickHouse_SOURCE_DIR}/base/base/iostream_debug_helpers.h\"")
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${INCLUDE_DEBUG_HELPERS}")
endif ()
@ -85,6 +85,7 @@ target_link_libraries (common
replxx
cctz
fmt
magic_enum
)
if (ENABLE_TESTS)

75
base/base/CachedFn.h Normal file
View File

@ -0,0 +1,75 @@
#pragma once
#include <map>
#include <tuple>
#include <mutex>
#include "FnTraits.h"
/**
* Caching proxy for a functor that decays to a pointer-to-function.
* Saves pairs (func args, func result on args).
* Cache size is unlimited. Cache items are evicted only on manual drop.
* Invocation/update is O(log(saved cache values)).
*
* See Common/tests/cached_fn.cpp for examples.
*/
template <auto * Func>
struct CachedFn
{
private:
using Traits = FnTraits<decltype(Func)>;
using DecayedArgs = TLMap<std::decay_t, typename Traits::Args>;
using Key = TLChangeRoot<std::tuple, DecayedArgs>;
using Result = typename Traits::Ret;
std::map<Key, Result> cache; // Can't use hashmap as tuples are unhashable by default
mutable std::mutex mutex;
public:
template <class ...Args>
Result operator()(Args && ...args)
{
Key key{std::forward<Args>(args)...};
{
std::lock_guard lock(mutex);
if (auto it = cache.find(key); it != cache.end())
return it->second;
}
Result res = std::apply(Func, key);
{
std::lock_guard lock(mutex);
cache.emplace(std::move(key), res);
}
return res;
}
template <class ...Args>
void update(Args && ...args)
{
Key key{std::forward<Args>(args)...};
Result res = std::apply(Func, key);
{
std::lock_guard lock(mutex);
// TODO Can't use emplace(std::move(key), ..), causes test_host_ip_change errors.
cache[key] = std::move(res);
}
}
size_t size() const
{
std::lock_guard lock(mutex);
return cache.size();
}
void drop()
{
std::lock_guard lock(mutex);
cache.clear();
}
};

0
base/common/DateLUT.cpp → base/base/DateLUT.cpp
View File

0
base/common/DateLUT.h → base/base/DateLUT.h
View File

2
base/common/DateLUTImpl.cpp → base/base/DateLUTImpl.cpp
View File

@ -3,7 +3,7 @@
#include <cctz/civil_time.h>
#include <cctz/time_zone.h>
#include <cctz/zone_info_source.h>
#include <common/getResource.h>
#include <base/getResource.h>
#include <Poco/Exception.h>
#include <algorithm>

0
base/common/DateLUTImpl.h → base/base/DateLUTImpl.h
View File

4
base/common/DayNum.h → base/base/DayNum.h
View File

@ -1,7 +1,7 @@
#pragma once
#include <common/types.h>
#include <common/strong_typedef.h>
#include <base/types.h>
#include <base/strong_typedef.h>
/** Represents number of days since 1970-01-01.
* See DateLUTImpl for usage examples.

157
base/base/Decimal.h Normal file
View File

@ -0,0 +1,157 @@
#pragma once
#include <base/extended_types.h>
#if !defined(NO_SANITIZE_UNDEFINED)
#if defined(__clang__)
#define NO_SANITIZE_UNDEFINED __attribute__((__no_sanitize__("undefined")))
#else
#define NO_SANITIZE_UNDEFINED
#endif
#endif
namespace DB
{
template <class> struct Decimal;
class DateTime64;
using Decimal32 = Decimal<Int32>;
using Decimal64 = Decimal<Int64>;
using Decimal128 = Decimal<Int128>;
using Decimal256 = Decimal<Int256>;
template <class T>
concept is_decimal =
std::is_same_v<T, Decimal32>
|| std::is_same_v<T, Decimal64>
|| std::is_same_v<T, Decimal128>
|| std::is_same_v<T, Decimal256>
|| std::is_same_v<T, DateTime64>;
template <class T>
concept is_over_big_int =
std::is_same_v<T, Int128>
|| std::is_same_v<T, UInt128>
|| std::is_same_v<T, Int256>
|| std::is_same_v<T, UInt256>
|| std::is_same_v<T, Decimal128>
|| std::is_same_v<T, Decimal256>;
template <class T> struct NativeTypeT { using Type = T; };
template <is_decimal T> struct NativeTypeT<T> { using Type = typename T::NativeType; };
template <class T> using NativeType = typename NativeTypeT<T>::Type;
/// Own FieldType for Decimal.
/// It is only a "storage" for decimal.
/// To perform operations, you also have to provide a scale (number of digits after point).
template <typename T>
struct Decimal
{
using NativeType = T;
constexpr Decimal() = default;
constexpr Decimal(Decimal<T> &&) = default;
constexpr Decimal(const Decimal<T> &) = default;
constexpr Decimal(const T & value_): value(value_) {}
template <typename U>
constexpr Decimal(const Decimal<U> & x): value(x.value) {}
constexpr Decimal<T> & operator = (Decimal<T> &&) = default;
constexpr Decimal<T> & operator = (const Decimal<T> &) = default;
constexpr operator T () const { return value; }
template <typename U>
constexpr U convertTo() const
{
if constexpr (is_decimal<U>)
return convertTo<typename U::NativeType>();
else
return static_cast<U>(value);
}
const Decimal<T> & operator += (const T & x) { value += x; return *this; }
const Decimal<T> & operator -= (const T & x) { value -= x; return *this; }
const Decimal<T> & operator *= (const T & x) { value *= x; return *this; }
const Decimal<T> & operator /= (const T & x) { value /= x; return *this; }
const Decimal<T> & operator %= (const T & x) { value %= x; return *this; }
template <typename U> const Decimal<T> & operator += (const Decimal<U> & x) { value += x.value; return *this; }
template <typename U> const Decimal<T> & operator -= (const Decimal<U> & x) { value -= x.value; return *this; }
template <typename U> const Decimal<T> & operator *= (const Decimal<U> & x) { value *= x.value; return *this; }
template <typename U> const Decimal<T> & operator /= (const Decimal<U> & x) { value /= x.value; return *this; }
template <typename U> const Decimal<T> & operator %= (const Decimal<U> & x) { value %= x.value; return *this; }
/// This is to avoid UB for sumWithOverflow()
void NO_SANITIZE_UNDEFINED addOverflow(const T & x) { value += x; }
T value;
};
template <typename T> inline bool operator< (const Decimal<T> & x, const Decimal<T> & y) { return x.value < y.value; }
template <typename T> inline bool operator> (const Decimal<T> & x, const Decimal<T> & y) { return x.value > y.value; }
template <typename T> inline bool operator<= (const Decimal<T> & x, const Decimal<T> & y) { return x.value <= y.value; }
template <typename T> inline bool operator>= (const Decimal<T> & x, const Decimal<T> & y) { return x.value >= y.value; }
template <typename T> inline bool operator== (const Decimal<T> & x, const Decimal<T> & y) { return x.value == y.value; }
template <typename T> inline bool operator!= (const Decimal<T> & x, const Decimal<T> & y) { return x.value != y.value; }
template <typename T> inline Decimal<T> operator+ (const Decimal<T> & x, const Decimal<T> & y) { return x.value + y.value; }
template <typename T> inline Decimal<T> operator- (const Decimal<T> & x, const Decimal<T> & y) { return x.value - y.value; }
template <typename T> inline Decimal<T> operator* (const Decimal<T> & x, const Decimal<T> & y) { return x.value * y.value; }
template <typename T> inline Decimal<T> operator/ (const Decimal<T> & x, const Decimal<T> & y) { return x.value / y.value; }
template <typename T> inline Decimal<T> operator- (const Decimal<T> & x) { return -x.value; }
/// Distinguishable type to allow function resolution/deduction based on value type,
/// but also relatively easy to convert to/from Decimal64.
class DateTime64 : public Decimal64
{
public:
using Base = Decimal64;
using Base::Base;
using NativeType = Base::NativeType;
constexpr DateTime64(const Base & v): Base(v) {}
};
}
constexpr DB::UInt64 max_uint_mask = std::numeric_limits<DB::UInt64>::max();
namespace std
{
template <typename T>
struct hash<DB::Decimal<T>>
{
size_t operator()(const DB::Decimal<T> & x) const { return hash<T>()(x.value); }
};
template <>
struct hash<DB::Decimal128>
{
size_t operator()(const DB::Decimal128 & x) const
{
return std::hash<DB::Int64>()(x.value >> 64)
^ std::hash<DB::Int64>()(x.value & max_uint_mask);
}
};
template <>
struct hash<DB::DateTime64>
{
size_t operator()(const DB::DateTime64 & x) const
{
return std::hash<DB::DateTime64::NativeType>()(x);
}
};
template <>
struct hash<DB::Decimal256>
{
size_t operator()(const DB::Decimal256 & x) const
{
// FIXME temp solution
return std::hash<DB::Int64>()(static_cast<DB::Int64>(x.value >> 64 & max_uint_mask))
^ std::hash<DB::Int64>()(static_cast<DB::Int64>(x.value & max_uint_mask));
}
};
}

2
base/common/DecomposedFloat.h → base/base/DecomposedFloat.h
View File

@ -3,7 +3,7 @@
#include <cstdint>
#include <cstddef>
#include <cstring>
#include <common/extended_types.h>
#include <base/extended_types.h>
/// Allows to check the internals of IEEE-754 floating point number.

38
base/base/EnumReflection.h Normal file
View File

@ -0,0 +1,38 @@
#pragma once
#include <magic_enum.hpp>
#include <fmt/format.h>
template <class T> concept is_enum = std::is_enum_v<T>;
namespace detail
{
template <is_enum E, class F, size_t ...I>
constexpr void static_for(F && f, std::index_sequence<I...>)
{
(std::forward<F>(f)(std::integral_constant<E, magic_enum::enum_value<E>(I)>()) , ...);
}
}
/**
* Iterate over enum values in compile-time (compile-time switch/case, loop unrolling).
*
* @example static_for<E>([](auto enum_value) { return template_func<enum_value>(); }
* ^ enum_value can be used as a template parameter
*/
template <is_enum E, class F>
constexpr void static_for(F && f)
{
constexpr size_t count = magic_enum::enum_count<E>();
detail::static_for<E>(std::forward<F>(f), std::make_index_sequence<count>());
}
/// Enable printing enum values as strings via fmt + magic_enum
template <is_enum T>
struct fmt::formatter<T> : fmt::formatter<std::string_view>
{
constexpr auto format(T value, auto& format_context)
{
return formatter<string_view>::format(magic_enum::enum_name(value), format_context);
}
};

2
base/common/ErrorHandlers.h → base/base/ErrorHandlers.h
View File

@ -1,7 +1,7 @@
#pragma once
#include <Poco/ErrorHandler.h>
#include <common/logger_useful.h>
#include <base/logger_useful.h>
#include <Common/Exception.h>

34
base/base/FnTraits.h Normal file
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@ -0,0 +1,34 @@
#pragma once
#include "Typelist.h"
namespace detail
{
template <class T>
struct FnTraits { template <class> static constexpr bool value = false; };
template <class R, class ...A>
struct FnTraits<R(A...)>
{
template <class F>
static constexpr bool value = std::is_invocable_r_v<R, F, A...>;
using Ret = R;
using Args = Typelist<A...>;
};
template <class R, class ...A>
struct FnTraits<R(*)(A...)> : FnTraits<R(A...)> {};
}
template <class T> using FnTraits = detail::FnTraits<T>;
/**
* A less-typing alias for std::is_invokable_r_v.
* @example void foo(Fn<bool(int, char)> auto && functor)
*/
template <class F, class FS>
concept Fn = FnTraits<FS>::template value<F>;
template <auto Value>
using Constant = std::integral_constant<decltype(Value), Value>;

0
base/common/FunctorToStaticMethodAdaptor.h → base/base/FunctorToStaticMethodAdaptor.h
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6
base/common/JSON.cpp → base/base/JSON.cpp
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@ -3,9 +3,9 @@
#include <Poco/UTF8Encoding.h>
#include <Poco/NumberParser.h>
#include <common/JSON.h>
#include <common/find_symbols.h>
#include <common/preciseExp10.h>
#include <base/JSON.h>
#include <base/find_symbols.h>
#include <base/preciseExp10.h>
#include <iostream>

4
base/common/JSON.h → base/base/JSON.h
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@ -2,8 +2,8 @@
#include <typeinfo>
#include <Poco/Exception.h>
#include <common/StringRef.h>
#include <common/types.h>
#include <base/StringRef.h>
#include <base/types.h>
/** Очень простой класс для чтения JSON (или его кусочков).

6
base/common/LineReader.cpp → base/base/LineReader.cpp
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@ -1,4 +1,4 @@
#include <common/LineReader.h>
#include <base/LineReader.h>
#include <iostream>
#include <string_view>
@ -16,6 +16,10 @@ extern "C"
}
#endif
#ifdef HAS_RESERVED_IDENTIFIER
#pragma clang diagnostic ignored "-Wreserved-identifier"
#endif
namespace
{

2
base/common/LineReader.h → base/base/LineReader.h
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@ -1,6 +1,6 @@
#pragma once
#include <common/types.h>
#include <base/types.h>
#include <atomic>
#include <vector>

2
base/common/LocalDate.h → base/base/LocalDate.h
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@ -4,7 +4,7 @@
#include <string>
#include <sstream>
#include <exception>
#include <common/DateLUT.h>
#include <base/DateLUT.h>
/** Stores a calendar date in broken-down form (year, month, day-in-month).

4
base/common/LocalDateTime.h → base/base/LocalDateTime.h
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@ -3,8 +3,8 @@
#include <string>
#include <iomanip>
#include <exception>
#include <common/DateLUT.h>
#include <common/LocalDate.h>
#include <base/DateLUT.h>
#include <base/LocalDate.h>
/** Stores calendar date and time in broken-down form.

2
base/common/MoveOrCopyIfThrow.h → base/base/MoveOrCopyIfThrow.h
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@ -1,6 +1,6 @@
#pragma once
#include <common/types.h>
#include <base/types.h>
namespace detail
{

6
base/common/ReadlineLineReader.cpp → base/base/ReadlineLineReader.cpp
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@ -1,6 +1,6 @@
#include <common/ReadlineLineReader.h>
#include <common/errnoToString.h>
#include <common/scope_guard.h>
#include <base/ReadlineLineReader.h>
#include <base/errnoToString.h>
#include <base/scope_guard.h>
#include <errno.h>
#include <signal.h>

0
base/common/ReadlineLineReader.h → base/base/ReadlineLineReader.h
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4
base/common/ReplxxLineReader.cpp → base/base/ReplxxLineReader.cpp
View File

@ -1,5 +1,5 @@
#include <common/ReplxxLineReader.h>
#include <common/errnoToString.h>
#include <base/ReplxxLineReader.h>
#include <base/errnoToString.h>
#include <chrono>
#include <cerrno>

0
base/common/ReplxxLineReader.h → base/base/ReplxxLineReader.h
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0
base/common/StringRef.cpp → base/base/StringRef.cpp
View File

68
base/common/StringRef.h → base/base/StringRef.h
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@ -7,8 +7,8 @@
#include <functional>
#include <iosfwd>
#include <common/types.h>
#include <common/unaligned.h>
#include <base/types.h>
#include <base/unaligned.h>
#include <city.h>
@ -96,6 +96,39 @@ inline bool compareSSE2x4(const char * p1, const char * p2)
inline bool memequalSSE2Wide(const char * p1, const char * p2, size_t size)
{
/** The order of branches and the trick with overlapping comparisons
* are the same as in memcpy implementation.
* See the comments in base/glibc-compatibility/memcpy/memcpy.h
*/
if (size <= 16)
{
if (size >= 8)
{
/// Chunks of 8..16 bytes.
return unalignedLoad<uint64_t>(p1) == unalignedLoad<uint64_t>(p2)
&& unalignedLoad<uint64_t>(p1 + size - 8) == unalignedLoad<uint64_t>(p2 + size - 8);
}
else if (size >= 4)
{
/// Chunks of 4..7 bytes.
return unalignedLoad<uint32_t>(p1) == unalignedLoad<uint32_t>(p2)
&& unalignedLoad<uint32_t>(p1 + size - 4) == unalignedLoad<uint32_t>(p2 + size - 4);
}
else if (size >= 2)
{
/// Chunks of 2..3 bytes.
return unalignedLoad<uint16_t>(p1) == unalignedLoad<uint16_t>(p2)
&& unalignedLoad<uint16_t>(p1 + size - 2) == unalignedLoad<uint16_t>(p2 + size - 2);
}
else if (size >= 1)
{
/// A single byte.
return *p1 == *p2;
}
return true;
}
while (size >= 64)
{
if (compareSSE2x4(p1, p2))
@ -108,39 +141,14 @@ inline bool memequalSSE2Wide(const char * p1, const char * p2, size_t size)
return false;
}
switch ((size % 64) / 16)
switch (size / 16)
{
case 3: if (!compareSSE2(p1 + 32, p2 + 32)) return false; [[fallthrough]];
case 2: if (!compareSSE2(p1 + 16, p2 + 16)) return false; [[fallthrough]];
case 1: if (!compareSSE2(p1 , p2 )) return false; [[fallthrough]];
case 0: break;
case 1: if (!compareSSE2(p1, p2)) return false;
}
p1 += (size % 64) / 16 * 16;
p2 += (size % 64) / 16 * 16;
switch (size % 16)
{
case 15: if (p1[14] != p2[14]) return false; [[fallthrough]];
case 14: if (p1[13] != p2[13]) return false; [[fallthrough]];
case 13: if (p1[12] != p2[12]) return false; [[fallthrough]];
case 12: if (unalignedLoad<uint32_t>(p1 + 8) == unalignedLoad<uint32_t>(p2 + 8)) goto l8; else return false;
case 11: if (p1[10] != p2[10]) return false; [[fallthrough]];
case 10: if (p1[9] != p2[9]) return false; [[fallthrough]];
case 9: if (p1[8] != p2[8]) return false;
l8: [[fallthrough]];
case 8: return unalignedLoad<uint64_t>(p1) == unalignedLoad<uint64_t>(p2);
case 7: if (p1[6] != p2[6]) return false; [[fallthrough]];
case 6: if (p1[5] != p2[5]) return false; [[fallthrough]];
case 5: if (p1[4] != p2[4]) return false; [[fallthrough]];
case 4: return unalignedLoad<uint32_t>(p1) == unalignedLoad<uint32_t>(p2);
case 3: if (p1[2] != p2[2]) return false; [[fallthrough]];
case 2: return unalignedLoad<uint16_t>(p1) == unalignedLoad<uint16_t>(p2);
case 1: if (p1[0] != p2[0]) return false; [[fallthrough]];
case 0: break;
}
return true;
return compareSSE2(p1 + size - 16, p2 + size - 16);
}
#endif

51
base/base/TypeName.h Normal file
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@ -0,0 +1,51 @@
#pragma once
#include "Decimal.h"
#include "UUID.h"
namespace DB
{
struct Array;
struct Tuple;
struct Map;
struct AggregateFunctionStateData;
/**
* Obtain type string representation from real type if possible.
* @example TypeName<UInt8> == "UInt8"
*/
template <class T> constexpr inline std::string_view TypeName;
#define TN_MAP(_A) \
template <> constexpr inline std::string_view TypeName<_A> = #_A;
TN_MAP(UInt8)
TN_MAP(UInt16)
TN_MAP(UInt32)
TN_MAP(UInt64)
TN_MAP(UInt128)
TN_MAP(UInt256)
TN_MAP(Int8)
TN_MAP(Int16)
TN_MAP(Int32)
TN_MAP(Int64)
TN_MAP(Int128)
TN_MAP(Int256)
TN_MAP(Float32)
TN_MAP(Float64)
TN_MAP(String)
TN_MAP(UUID)
TN_MAP(Decimal32)
TN_MAP(Decimal64)
TN_MAP(Decimal128)
TN_MAP(Decimal256)
TN_MAP(DateTime64)
TN_MAP(Array)
TN_MAP(Tuple)
TN_MAP(Map)
/// Special case
template <> constexpr inline std::string_view TypeName<AggregateFunctionStateData> = "AggregateFunctionState";
#undef TN_MAP
}

4
base/base/TypePair.h Normal file
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@ -0,0 +1,4 @@
#pragma once
template <class T, class V> struct TypePair { };
template <class T> struct Id { };

44
base/base/Typelist.h Normal file
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@ -0,0 +1,44 @@
#pragma once
#include <cstddef>
#include <type_traits>
#include <utility>
#include "defines.h"
#include "TypePair.h"
/// General-purpose typelist. Easy on compilation times as it does not use recursion.
template <class ...Args>
struct Typelist { static constexpr size_t size = sizeof...(Args); };
namespace TLUtils /// In some contexts it's more handy to use functions instead of aliases
{
template <class ...LArgs, class ...RArgs>
constexpr Typelist<LArgs..., RArgs...> concat(Typelist<LArgs...>, Typelist<RArgs...>) { return {}; }
template <class T, class ...Args>
constexpr Typelist<T, Args...> prepend(Typelist<Args...>) { return {}; }
template <class T, class ...Args>
constexpr Typelist<Args..., T> append(Typelist<Args...>) { return {}; }
template <template<class> class F, class ...Args>
constexpr Typelist<F<Args>...> map(Typelist<Args...>) { return {}; }
template <template<class...> class Root, class ...Args>
constexpr Root<Args...> changeRoot(Typelist<Args...>) { return {}; }
template <class F, class ...Args>
constexpr void forEach(Typelist<Args...>, F && f) { (std::forward<F>(f)(Id<Args>{}), ...); }
}
template <class TLLeft, class TLRight>
using TLConcat = decltype(TLUtils::concat(TLLeft{}, TLRight{}));
template <class T, class Typelist> using TLPrepend = decltype(TLUtils::prepend<T>(Typelist{}));
template <class T, class Typelist> using TLAppend = decltype(TLUtils::append<T>(Typelist{}));
template <template<class> class F, class Typelist>
using TLMap = decltype(TLUtils::map<F>(Typelist{}));
template <template<class...> class Root, class Typelist>
using TLChangeRoot = decltype(TLUtils::changeRoot<Root>(Typelist{}));

18
base/base/Typelists.h Normal file
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@ -0,0 +1,18 @@
#pragma once
#include "Typelist.h"
#include "extended_types.h"
#include "Decimal.h"
#include "UUID.h"
namespace DB
{
using TLIntegral = Typelist<UInt8, UInt16, UInt32, UInt64, Int8, Int16, Int32, Int64, Float32, Float64>;
using TLExtendedIntegral = Typelist<UInt128, Int128, UInt256, Int256>;
using TLDecimals = Typelist<Decimal32, Decimal64, Decimal128, Decimal256>;
using TLIntegralWithExtended = TLConcat<TLIntegral, TLExtendedIntegral>;
using TLNumbers = TLConcat<TLIntegralWithExtended, TLDecimals>;
using TLNumbersWithUUID = TLAppend<UUID, TLNumbers>;
}

9
base/base/UUID.h Normal file
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@ -0,0 +1,9 @@
#pragma once
#include "strong_typedef.h"
#include "extended_types.h"
namespace DB
{
using UUID = StrongTypedef<UInt128, struct UUIDTag>;
}

0
base/common/argsToConfig.cpp → base/base/argsToConfig.cpp
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0
base/common/argsToConfig.h → base/base/argsToConfig.h
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17
base/common/arithmeticOverflow.h → base/base/arithmeticOverflow.h
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@ -1,7 +1,7 @@
#pragma once
#include <common/extended_types.h>
#include <common/defines.h>
#include <base/extended_types.h>
#include <base/defines.h>
namespace common
@ -145,6 +145,19 @@ namespace common
return __builtin_mul_overflow(x, y, &res);
}
template <typename T, typename U, typename R>
inline bool mulOverflow(T x, U y, R & res)
{
// not built in type, wide integer
if constexpr (is_big_int_v<T> || is_big_int_v<R> || is_big_int_v<U>)
{
res = mulIgnoreOverflow<R>(x, y);
return false;
}
else
return __builtin_mul_overflow(x, y, &res);
}
template <>
inline bool mulOverflow(int x, int y, int & res)
{

0
base/common/arraySize.h → base/base/arraySize.h
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0
base/common/bit_cast.h → base/base/bit_cast.h
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0
base/common/chrono_io.h → base/base/chrono_io.h
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0
base/common/constexpr_helpers.h → base/base/constexpr_helpers.h
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0
base/common/coverage.cpp → base/base/coverage.cpp
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0
base/common/coverage.h → base/base/coverage.h
View File

40
base/common/defines.h → base/base/defines.h
View File

@ -8,38 +8,25 @@
/// NOTE:
/// - __has_feature cannot be simply undefined,
/// since this will be broken if some C++ header will be included after
/// including <common/defines.h>
/// including <base/defines.h>
/// - it should not have fallback to 0,
/// since this may create false-positive detection (common problem)
#if defined(__clang__) && defined(__has_feature)
# define ch_has_feature __has_feature
#endif
#if defined(_MSC_VER)
# if !defined(likely)
# define likely(x) (x)
# endif
# if !defined(unlikely)
# define unlikely(x) (x)
# endif
#else
# if !defined(likely)
# define likely(x) (__builtin_expect(!!(x), 1))
# endif
# if !defined(unlikely)
# define unlikely(x) (__builtin_expect(!!(x), 0))
# endif
#if !defined(likely)
# define likely(x) (__builtin_expect(!!(x), 1))
#endif
#if !defined(unlikely)
# define unlikely(x) (__builtin_expect(!!(x), 0))
#endif
#if defined(_MSC_VER)
# define ALWAYS_INLINE __forceinline
# define NO_INLINE static __declspec(noinline)
# define MAY_ALIAS
#else
# define ALWAYS_INLINE __attribute__((__always_inline__))
# define NO_INLINE __attribute__((__noinline__))
# define MAY_ALIAS __attribute__((__may_alias__))
#endif
// more aliases: https://mailman.videolan.org/pipermail/x264-devel/2014-May/010660.html
#define ALWAYS_INLINE __attribute__((__always_inline__))
#define NO_INLINE __attribute__((__noinline__))
#define MAY_ALIAS __attribute__((__may_alias__))
#if !defined(__x86_64__) && !defined(__aarch64__) && !defined(__PPC__)
# error "The only supported platforms are x86_64 and AArch64, PowerPC (work in progress)"
@ -117,6 +104,11 @@
# define ALWAYS_INLINE_NO_SANITIZE_UNDEFINED ALWAYS_INLINE
#endif
#if !__has_include(<sanitizer/asan_interface.h>) || !defined(ADDRESS_SANITIZER)
# define ASAN_UNPOISON_MEMORY_REGION(a, b)
# define ASAN_POISON_MEMORY_REGION(a, b)
#endif
/// A template function for suppressing warnings about unused variables or function results.
template <typename... Args>
constexpr void UNUSED(Args &&... args [[maybe_unused]])

20
base/common/demangle.cpp → base/base/demangle.cpp
View File

@ -1,19 +1,4 @@
#include <common/demangle.h>
#if defined(_MSC_VER)
DemangleResult tryDemangle(const char *)
{
return DemangleResult{};
}
std::string demangle(const char * name, int & status)
{
status = 0;
return name;
}
#else
#include <base/demangle.h>
#include <stdlib.h>
#include <cxxabi.h>
@ -39,6 +24,3 @@ std::string demangle(const char * name, int & status)
return name;
}
#endif

0
base/common/demangle.h → base/base/demangle.h
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0
base/common/errnoToString.cpp → base/base/errnoToString.cpp
View File

0
base/common/errnoToString.h → base/base/errnoToString.h
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26
base/common/extended_types.h → base/base/extended_types.h
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@ -2,8 +2,8 @@
#include <type_traits>
#include <common/types.h>
#include <common/wide_integer.h>
#include <base/types.h>
#include <base/wide_integer.h>
using Int128 = wide::integer<128, signed>;
@ -41,22 +41,14 @@ template <> struct is_unsigned<UInt256> { static constexpr bool value = true; };
template <typename T>
inline constexpr bool is_unsigned_v = is_unsigned<T>::value;
template <class T> concept is_integer =
std::is_integral_v<T>
|| std::is_same_v<T, Int128>
|| std::is_same_v<T, UInt128>
|| std::is_same_v<T, Int256>
|| std::is_same_v<T, UInt256>;
/// TODO: is_integral includes char, char8_t and wchar_t.
template <typename T>
struct is_integer
{
static constexpr bool value = std::is_integral_v<T>;
};
template <> struct is_integer<Int128> { static constexpr bool value = true; };
template <> struct is_integer<UInt128> { static constexpr bool value = true; };
template <> struct is_integer<Int256> { static constexpr bool value = true; };
template <> struct is_integer<UInt256> { static constexpr bool value = true; };
template <typename T>
inline constexpr bool is_integer_v = is_integer<T>::value;
template <class T> concept is_floating_point = std::is_floating_point_v<T>;
template <typename T>
struct is_arithmetic

46
base/common/find_symbols.h → base/base/find_symbols.h
View File

@ -36,18 +36,7 @@
namespace detail
{
template <char s0>
inline bool is_in(char x)
{
return x == s0;
}
template <char s0, char s1, char... tail>
inline bool is_in(char x)
{
return x == s0 || is_in<s1, tail...>(x);
}
template <char ...chars> constexpr bool is_in(char x) { return ((x == chars) || ...); }
#if defined(__SSE2__)
template <char s0>
@ -67,16 +56,10 @@ inline __m128i mm_is_in(__m128i bytes)
#endif
template <bool positive>
bool maybe_negate(bool x)
{
if constexpr (positive)
return x;
else
return !x;
}
constexpr bool maybe_negate(bool x) { return x == positive; }
template <bool positive>
uint16_t maybe_negate(uint16_t x)
constexpr uint16_t maybe_negate(uint16_t x)
{
if constexpr (positive)
return x;
@ -149,12 +132,13 @@ template <bool positive, ReturnMode return_mode, size_t num_chars,
char c05 = 0, char c06 = 0, char c07 = 0, char c08 = 0,
char c09 = 0, char c10 = 0, char c11 = 0, char c12 = 0,
char c13 = 0, char c14 = 0, char c15 = 0, char c16 = 0>
inline const char * find_first_symbols_sse42_impl(const char * const begin, const char * const end)
inline const char * find_first_symbols_sse42(const char * const begin, const char * const end)
{
const char * pos = begin;
#if defined(__SSE4_2__)
#define MODE (_SIDD_UBYTE_OPS | _SIDD_CMP_EQUAL_ANY | _SIDD_LEAST_SIGNIFICANT)
constexpr int mode = _SIDD_UBYTE_OPS | _SIDD_CMP_EQUAL_ANY | _SIDD_LEAST_SIGNIFICANT;
__m128i set = _mm_setr_epi8(c01, c02, c03, c04, c05, c06, c07, c08, c09, c10, c11, c12, c13, c14, c15, c16);
for (; pos + 15 < end; pos += 16)
@ -163,16 +147,15 @@ inline const char * find_first_symbols_sse42_impl(const char * const begin, cons
if constexpr (positive)
{
if (_mm_cmpestrc(set, num_chars, bytes, 16, MODE))
return pos + _mm_cmpestri(set, num_chars, bytes, 16, MODE);
if (_mm_cmpestrc(set, num_chars, bytes, 16, mode))
return pos + _mm_cmpestri(set, num_chars, bytes, 16, mode);
}
else
{
if (_mm_cmpestrc(set, num_chars, bytes, 16, MODE | _SIDD_NEGATIVE_POLARITY))
return pos + _mm_cmpestri(set, num_chars, bytes, 16, MODE | _SIDD_NEGATIVE_POLARITY);
if (_mm_cmpestrc(set, num_chars, bytes, 16, mode | _SIDD_NEGATIVE_POLARITY))
return pos + _mm_cmpestri(set, num_chars, bytes, 16, mode | _SIDD_NEGATIVE_POLARITY);
}
}
#undef MODE
#endif
for (; pos < end; ++pos)
@ -197,20 +180,15 @@ inline const char * find_first_symbols_sse42_impl(const char * const begin, cons
}
template <bool positive, ReturnMode return_mode, char... symbols>
inline const char * find_first_symbols_sse42(const char * begin, const char * end)
{
return find_first_symbols_sse42_impl<positive, return_mode, sizeof...(symbols), symbols...>(begin, end);
}
/// NOTE No SSE 4.2 implementation for find_last_symbols_or_null. Not worth to do.
template <bool positive, ReturnMode return_mode, char... symbols>
inline const char * find_first_symbols_dispatch(const char * begin, const char * end)
requires(0 <= sizeof...(symbols) && sizeof...(symbols) <= 16)
{
#if defined(__SSE4_2__)
if (sizeof...(symbols) >= 5)
return find_first_symbols_sse42<positive, return_mode, symbols...>(begin, end);
return find_first_symbols_sse42<positive, return_mode, sizeof...(symbols), symbols...>(begin, end);
else
#endif
return find_first_symbols_sse2<positive, return_mode, symbols...>(begin, end);

2
base/common/getFQDNOrHostName.cpp → base/base/getFQDNOrHostName.cpp
View File

@ -1,5 +1,5 @@
#include <Poco/Net/DNS.h>
#include <common/getFQDNOrHostName.h>
#include <base/getFQDNOrHostName.h>
namespace

0
base/common/getFQDNOrHostName.h → base/base/getFQDNOrHostName.h
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4
base/common/getMemoryAmount.cpp → base/base/getMemoryAmount.cpp
View File

@ -1,6 +1,6 @@
#include <stdexcept>
#include "common/getMemoryAmount.h"
#include "common/getPageSize.h"
#include <base/getMemoryAmount.h>
#include <base/getPageSize.h>
#include <unistd.h>
#include <sys/types.h>

0
base/common/getMemoryAmount.h → base/base/getMemoryAmount.h
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4
base/common/getPageSize.cpp → base/base/getPageSize.cpp
View File

@ -1,7 +1,7 @@
#include "common/getPageSize.h"
#include <base/getPageSize.h>
#include <unistd.h>
Int64 getPageSize()
{
return sysconf(_SC_PAGESIZE);

3
base/common/getPageSize.h → base/base/getPageSize.h
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@ -1,6 +1,7 @@
#pragma once
#include "common/types.h"
#include <base/types.h>
/// Get memory page size
Int64 getPageSize();

0
base/common/getResource.cpp → base/base/getResource.cpp
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0
base/common/getResource.h → base/base/getResource.h
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2
base/common/getThreadId.cpp → base/base/getThreadId.cpp
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@ -1,4 +1,4 @@
#include <common/getThreadId.h>
#include <base/getThreadId.h>
#if defined(OS_ANDROID)
#include <sys/types.h>

0
base/common/getThreadId.h → base/base/getThreadId.h
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28
base/base/insertAtEnd.h Normal file
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@ -0,0 +1,28 @@
#pragma once
#include <vector>
/// Appends a specified vector with elements of another vector.
template <typename T>
void insertAtEnd(std::vector<T> & dest, const std::vector<T> & src)
{
if (src.empty())
return;
dest.reserve(dest.size() + src.size());
dest.insert(dest.end(), src.begin(), src.end());
}
template <typename T>
void insertAtEnd(std::vector<T> & dest, std::vector<T> && src)
{
if (src.empty())
return;
if (dest.empty())
{
dest.swap(src);
return;
}
dest.reserve(dest.size() + src.size());
dest.insert(dest.end(), std::make_move_iterator(src.begin()), std::make_move_iterator(src.end()));
src.clear();
}

0
base/common/iostream_debug_helpers.h → base/base/iostream_debug_helpers.h
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2
base/common/itoa.h → base/base/itoa.h
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@ -30,7 +30,7 @@
#include <cstddef>
#include <cstring>
#include <type_traits>
#include <common/extended_types.h>
#include <base/extended_types.h>
namespace impl

1
base/common/logger_useful.h → base/base/logger_useful.h
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@ -42,6 +42,7 @@ namespace
} while (false)
#define LOG_TEST(logger, ...) LOG_IMPL(logger, DB::LogsLevel::test, Poco::Message::PRIO_TEST, __VA_ARGS__)
#define LOG_TRACE(logger, ...) LOG_IMPL(logger, DB::LogsLevel::trace, Poco::Message::PRIO_TRACE, __VA_ARGS__)
#define LOG_DEBUG(logger, ...) LOG_IMPL(logger, DB::LogsLevel::debug, Poco::Message::PRIO_DEBUG, __VA_ARGS__)
#define LOG_INFO(logger, ...) LOG_IMPL(logger, DB::LogsLevel::information, Poco::Message::PRIO_INFORMATION, __VA_ARGS__)

0
base/common/map.h → base/base/map.h
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10
base/common/mremap.cpp → base/base/mremap.cpp
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@ -1,4 +1,4 @@
#include <common/mremap.h>
#include <base/mremap.h>
#include <cstddef>
#include <cstdlib>
@ -19,22 +19,14 @@ void * mremap_fallback(
return MAP_FAILED;
}
#if defined(_MSC_VER)
void * new_address = ::operator new(new_size);
#else
void * new_address = mmap(nullptr, new_size, mmap_prot, mmap_flags, mmap_fd, mmap_offset);
if (MAP_FAILED == new_address)
return MAP_FAILED;
#endif
memcpy(new_address, old_address, old_size);
#if defined(_MSC_VER)
delete old_address;
#else
if (munmap(old_address, old_size))
abort();
#endif
return new_address;
}

2
base/common/mremap.h → base/base/mremap.h
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@ -2,9 +2,7 @@
#include <cstddef>
#include <sys/types.h>
#if !defined(_MSC_VER)
#include <sys/mman.h>
#endif
#ifdef MREMAP_MAYMOVE

6
base/common/phdr_cache.cpp → base/base/phdr_cache.cpp
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@ -1,6 +1,10 @@
#ifdef HAS_RESERVED_IDENTIFIER
#pragma clang diagnostic ignored "-Wreserved-identifier"
#endif
/// This code was based on the code by Fedor Korotkiy (prime@yandex-team.ru) for YT product in Yandex.
#include <common/defines.h>
#include <base/defines.h>
#if defined(__linux__) && !defined(THREAD_SANITIZER)
#define USE_PHDR_CACHE 1

0
base/common/phdr_cache.h → base/base/phdr_cache.h
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0
base/common/preciseExp10.cpp → base/base/preciseExp10.cpp
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0
base/common/preciseExp10.h → base/base/preciseExp10.h
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0
base/common/range.h → base/base/range.h
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0
base/common/removeDuplicates.h → base/base/removeDuplicates.h
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0
base/common/scope_guard.h → base/base/scope_guard.h
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4
base/common/scope_guard_safe.h → base/base/scope_guard_safe.h
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@ -1,7 +1,7 @@
#pragma once
#include <common/scope_guard.h>
#include <common/logger_useful.h>
#include <base/scope_guard.h>
#include <base/logger_useful.h>
#include <Common/MemoryTracker.h>
/// Same as SCOPE_EXIT() but block the MEMORY_LIMIT_EXCEEDED errors.

4
base/common/setTerminalEcho.cpp → base/base/setTerminalEcho.cpp
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@ -1,5 +1,5 @@
#include <common/setTerminalEcho.h>
#include <common/errnoToString.h>
#include <base/setTerminalEcho.h>
#include <base/errnoToString.h>
#include <stdexcept>
#include <cstring>
#include <string>

0
base/common/setTerminalEcho.h → base/base/setTerminalEcho.h
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0
base/common/shared_ptr_helper.h → base/base/shared_ptr_helper.h
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2
base/common/shift10.cpp → base/base/shift10.cpp
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@ -1,4 +1,4 @@
#include <common/shift10.h>
#include <base/shift10.h>
#include "defines.h"

2
base/common/shift10.h → base/base/shift10.h
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@ -1,6 +1,6 @@
#pragma once
#include <common/types.h>
#include <base/types.h>
/** Almost the same as x = x * exp10(exponent), but gives more accurate result.
* Example:

2
base/common/sleep.cpp → base/base/sleep.cpp
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@ -1,4 +1,4 @@
#include "common/sleep.h"
#include <base/sleep.h>
#include <time.h>
#include <errno.h>

0
base/common/sleep.h → base/base/sleep.h
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6
base/common/sort.h → base/base/sort.h
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@ -1,5 +1,8 @@
#pragma once
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wold-style-cast"
#if !defined(ARCADIA_BUILD)
# include <miniselect/floyd_rivest_select.h> // Y_IGNORE
#else
@ -34,4 +37,7 @@ void partial_sort(RandomIt first, RandomIt middle, RandomIt last, Compare compar
#else
::std::partial_sort(first, middle, last, compare);
#endif
#pragma GCC diagnostic pop
}

10
base/common/strong_typedef.h → base/base/strong_typedef.h
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@ -15,15 +15,15 @@ private:
public:
using UnderlyingType = T;
template <class Enable = typename std::is_copy_constructible<T>::type>
explicit StrongTypedef(const T & t_) : t(t_) {}
constexpr explicit StrongTypedef(const T & t_) : t(t_) {}
template <class Enable = typename std::is_move_constructible<T>::type>
explicit StrongTypedef(T && t_) : t(std::move(t_)) {}
constexpr explicit StrongTypedef(T && t_) : t(std::move(t_)) {}
template <class Enable = typename std::is_default_constructible<T>::type>
StrongTypedef(): t() {}
constexpr StrongTypedef(): t() {}
StrongTypedef(const Self &) = default;
StrongTypedef(Self &&) = default;
constexpr StrongTypedef(const Self &) = default;
constexpr StrongTypedef(Self &&) = default;
Self & operator=(const Self &) = default;
Self & operator=(Self &&) = default;

2
base/common/terminalColors.cpp → base/base/terminalColors.cpp
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@ -1,5 +1,5 @@
#include <string>
#include <common/terminalColors.h>
#include <base/terminalColors.h>
std::string setColor(UInt64 hash)

2
base/common/terminalColors.h → base/base/terminalColors.h
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@ -1,7 +1,7 @@
#pragma once
#include <string>
#include <common/types.h>
#include <base/types.h>
/** Set color in terminal based on 64-bit hash value.

0
base/common/tests/CMakeLists.txt → base/base/tests/CMakeLists.txt
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2
base/common/tests/dump_variable.cpp → base/base/tests/dump_variable.cpp
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@ -1,4 +1,4 @@
#include <common/iostream_debug_helpers.h>
#include <base/iostream_debug_helpers.h>
#include <iostream>
#include <memory>

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