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719c0bec-883e-4450-979e-066d3c9bb9db
Fixed error with "max_rows_to_sort" limit. #10268 ( alexey-milovidov ). Get dictionary and check access rights only once per each call of any function reading external dictionaries. #10928 ( Vitaly Baranov ). Improvement {#improvement-15} Apply TTL for old data, after ALTER MODIFY TTL query. This beha...
{"source_file": "2020.md"}
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a2e750b8-a872-4da3-9b83-27a7b3dc7990
Add support for distributed DDL ( UPDATE/DELETE/DROP PARTITION ) on cross replication clusters. #11508 ( frank lee ). Clear password from command line in clickhouse-client and clickhouse-benchmark if the user has specified it with explicit value. This prevents password exposure by ps and similar tools. #1166...
{"source_file": "2020.md"}
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3631bedd-78c9-4e72-9172-5ebf4dd58d83
Remove trailing whitespaces from formatted queries in clickhouse-client or clickhouse-format in some cases. #11325 ( alexey-milovidov ). Add setting "output_format_pretty_max_value_width". If value is longer, it will be cut to avoid output of too large values in terminal. This closes #11140 . #11324 ( alexey...
{"source_file": "2020.md"}
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ae946031-44c2-4c55-9e3d-ad81fdf7bf48
Better DNS exception message. This fixes #10813 . #10828 ( alexey-milovidov ). Change HTTP response code in case of some parse errors to 400 Bad Request. This fix #10636 . #10640 ( alexey-milovidov ). Print a message if clickhouse-client is newer than clickhouse-server. #10627 ( alexey-milovidov ). Adding...
{"source_file": "2020.md"}
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ebc33b31-4acf-43f0-916f-c6fdd3f2f6cc
Remove duplicate ORDER BY and DISTINCT from subqueries, this optimization is enabled with optimize_duplicate_order_by_and_distinct #10067 ( Mikhail Malafeev ). This feature eliminates functions of other keys in GROUP BY section, enabled with optimize_group_by_function_keys #10051 ( xPoSx ). New optimization...
{"source_file": "2020.md"}
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e93e005a-65ca-49b3-9935-ddc041491b83
Added a test to ensure that mutations continue to work after FREEZE query. #11820 ( alexey-milovidov ). Don't allow tests with "fail" substring in their names because it makes looking at the tests results in browser less convenient when you type Ctrl+F and search for "fail". #11817 ( alexey-milovidov ). Removes...
{"source_file": "2020.md"}
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60f94ec6-4d43-441c-b5f3-bda013c59918
Fixing 00979_live_view_watch_continuous_aggregates test. #11024 ( vzakaznikov ). Add ability to run zookeeper in integration tests over tmpfs. #11002 ( alesapin ). Wait for odbc-bridge with exponential backoff. Previous wait time of 200 ms was not enough in our CI environment. #10990 ( alexey-milovidov ). ...
{"source_file": "2020.md"}
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91cbde1d-4899-4975-a84a-4263dbe57371
Fix capnproto version check for capnp::UnalignedFlatArrayMessageReader . #10618 ( Matwey V. Kornilov ). Lower memory usage in tests. #10617 ( alexey-milovidov ). Fixing hard coded timeouts in new live view tests. #10604 ( vzakaznikov ). Increasing timeout when opening a client in tests/queries/0_stateles...
{"source_file": "2020.md"}
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5a5edf72-f79e-4fb3-bfdc-f5c7162d2f3c
Removed data for Distributed tables (blocks from async INSERTs) on DROP TABLE. #12556 ( Azat Khuzhin ). Fixed bug which lead to broken old parts after ALTER DELETE query when enable_mixed_granularity_parts=1 . Fixes #12536 . #12543 ( alesapin ). Better exception for function in with invalid number of argu...
{"source_file": "2020.md"}
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37f5f93d-caa8-452e-92aa-65f80eeff3b6
Fixed potential infinite loop in greatCircleDistance , geoDistance . This fixes #12117 . #12137 ( alexey-milovidov ). Normalize "pid" file handling. In previous versions the server may refuse to start if it was killed without proper shutdown and if there is another process that has the same pid as previously run...
{"source_file": "2020.md"}
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c85b264a-757d-4eec-8834-9d23f1440b24
Fixed potential floating point exception. This closes #11378 . #12005 ( alexey-milovidov ). Fixed wrong setting name in log message at server startup. #11997 ( alexey-milovidov ). Fixed Query parameter was not set in Values format. Fixes #11918 . #11936 ( tavplubix ). Keep aliases for substitutions in...
{"source_file": "2020.md"}
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29cd0c5a-36e5-4e56-96e7-608059037aa6
Add support for regular expressions with case-insensitive flags. This fixes #11101 and fixes #11506 . #11649 ( alexey-milovidov ). Remove trivial count query optimization if row-level security is set. In previous versions the user get total count of records in a table instead filtered. This fixes #11352 . #116...
{"source_file": "2020.md"}
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d982f248-8df1-4be3-be6d-59ed6fe0a850
Fix several non significant errors in unit tests. #11262 ( alesapin ). Fix (false) MSan report in MergeTreeIndexFullText. The issue first appeared in #9968 . #10801 ( alexey-milovidov ). ClickHouse release v20.4.5.36-stable 2020-06-10 {#clickhouse-release-v204536-stable-2020-06-10} Bug Fix {#bug-fix-30} ...
{"source_file": "2020.md"}
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9567a44f-4fc6-4400-adc8-0ec34a8132b9
Fix bug when query speed estimation can be incorrect and the limit of min_execution_speed may not work or work incorrectly if the query is throttled by max_network_bandwidth , max_execution_speed or priority settings. Change the default value of timeout_before_checking_execution_speed to non-zero, because othe...
{"source_file": "2020.md"}
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a05a4c31-54d0-478d-9eaa-7fb6d579bb40
ClickHouse release v20.4.4.18-stable 2020-05-26 {#clickhouse-release-v204418-stable-2020-05-26} No changes compared to v20.4.3.16-stable. ClickHouse release v20.4.3.16-stable 2020-05-23 {#clickhouse-release-v204316-stable-2020-05-23} Bug Fix {#bug-fix-31} Removed logging from mutation finalization task if not...
{"source_file": "2020.md"}
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9279d0d6-a79b-4116-a153-a2aa2f897dbc
Fixed potential read of uninitialized memory in cache-dictionary. #10834 ( alexey-milovidov ). Fixed columns order after Block::sortColumns() . #10826 ( Azat Khuzhin ). Fixed the issue with ODBC bridge when no quoting of identifiers is requested. Fixes #7984 . #10821 ( alexey-milovidov ). Fixed UBSan ...
{"source_file": "2020.md"}
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b2dd764c-5176-4b2d-b5c9-bd35ddcd2667
When string comparison involves FixedString and compared arguments are of different sizes, do comparison as if smaller string is padded to the length of the larger. This is intented for SQL compatibility if we imagine that FixedString data type corresponds to SQL CHAR. This closes #9272 . #10363 ( alexey-milovidov )...
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befa60b2-a7f6-4efb-90be-58ccfc8e865f
Consider NULL to be equal to NULL in IN operator, if the option transform_null_in is set. #10085 ( achimbab ) Add ALTER TABLE ... RENAME COLUMN for MergeTree table engines family. #9948 ( alesapin ) Support parallel distributed INSERT SELECT. #9759 ( vxider ) Add ability to query Distributed over ...
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80a5d3e0-020e-4694-b987-0c2d2e41440f
Fix index corruption, which may occur in some cases after merging compact parts into another compact part. #10531 ( Anton Popov ) Fix the situation, when mutation finished all parts, but hung up in is_done=0 . #10526 ( alesapin ) Fix overflow at beginning of unix epoch for timezones with fractional offset from...
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315c4b57-30d3-4ac5-a2f0-8121b4f34f0a
Fix order of columns after Block::sortColumns() #10826 ( Azat Khuzhin ) Fix possible Pipeline stuck error in ConcatProcessor which may happen in remote query. #10381 ( Nikolai Kochetov ) Don't make disk reservations for aggregations. Fixes #9241 #10375 ( Azat Khuzhin ) Fix wrong behaviour of datetime ...
{"source_file": "2020.md"}
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0230412d-ba04-4db4-aec7-303aa2e6afd9
Fix possible infinite query execution when the query actually should stop on LIMIT, while reading from infinite source like system.numbers or system.zeros . #10206 ( Nikolai Kochetov ) Fixed "generateRandom" function for Date type. This fixes #9973 . Fix an edge case when dates with year 2106 are inserted to Me...
{"source_file": "2020.md"}
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b59a3c9a-d2d9-4369-88cb-9113218258f2
Fixed replicated tables startup when updating from an old ClickHouse version where /table/replicas/replica_name/metadata node does not exist. Fixes #10037 . #10095 ( alesapin ) Fix error Cannot clone block with columns because block has 0 columns ... While executing GroupingAggregatedTransform . It happened whe...
{"source_file": "2020.md"}
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0ecd5b07-f734-4210-a0ea-81071fe93c75
Fix Distributed engine behavior when virtual columns of the underlying table used in WHERE #9847 ( Azat Khuzhin ) Fixed some cases when timezone of the function argument wasn't used properly. #9574 ( Vasily Nemkov ) Fix 'Different expressions with the same alias' error when query has PREWHERE and WHERE on dis...
{"source_file": "2020.md"}
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f31a936a-f5eb-4d57-b3b3-1fe0ec20ad10
Allow ALTER ON CLUSTER of Distributed tables with internal replication. This fixes #3268 #9617 ( shinoi2 ) Fix issue when timezone was not preserved if you write a simple arithmetic expression like time + 1 (in contrast to an expression like time + INTERVAL 1 SECOND ). This fixes #5743 #9323 ( alexey-mil...
{"source_file": "2020.md"}
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ddf600f7-8984-4da6-9d9a-55e1691e951e
Implemented generateRandom table function for Nested types. This closes #9903 #10219 ( alexey-milovidov ) Provide max_allowed_packed in MySQL compatibility interface that will help some clients to communicate with ClickHouse via MySQL protocol. #10199 ( BohuTANG ) Allow literals for GLOBAL IN (i.e. SELEC...
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bf843346-f2df-413c-97e3-5b2ec8bd4265
Check for using Date or DateTime column from TTL expressions was removed. #9967 ( Vladimir Chebotarev ) DiskS3 hard links optimal implementation. #9760 ( Pavel Kovalenko ) If set multiple_joins_rewriter_version = 2 enables second version of multiple JOIN rewrites that keeps not clashed column names as is....
{"source_file": "2020.md"}
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48b6ead6-2c74-490c-ab15-6b95ae732ca7
Build/Testing/Packaging Improvement {#buildtestingpackaging-improvement-15} Use a fork of AWS SDK libraries from ClickHouse-Extras #10527 ( Pavel Kovalenko ) Add integration tests for new ALTER RENAME COLUMN query. #10654 ( vzakaznikov ) Fix possible signed integer overflow in invocation of function now64 ...
{"source_file": "2020.md"}
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bd64d8d8-cc79-4a3b-84c7-e58d8bb6544a
Add performance test for #6924 #6980 ( filimonov ) Add support of /dev/null in the File engine for better performance testing #8455 ( Amos Bird ) Move all folders inside /dbms one level up #9974 ( Ivan ) Add a test that checks that read from MergeTree with single thread is performed in order. Addition...
{"source_file": "2020.md"}
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72cb83ea-e476-475a-bb4b-2b661ce20694
ClickHouse release v20.3 {#clickhouse-release-v203} ClickHouse release v20.3.21.2-lts, 2020-11-02 {#clickhouse-release-v203212-lts-2020-11-02} Bug Fix {#bug-fix-33} Fix dictGet in sharding_key (and similar places, i.e. when the function context is stored permanently). #16205 ( Azat Khuzhin ). Fix incorrect ...
{"source_file": "2020.md"}
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be2aa18f-ecde-49e8-b09b-f95ea1668ebb
Fix CAST(Nullable(String), Enum()). #12745 ( Azat Khuzhin ). Fixed data race in text_log . It does not correspond to any real bug. #9726 ( alexey-milovidov ). Improvement {#improvement-18} Fix wrong error for long queries. It was possible to get syntax error other than Max query size exceeded for corre...
{"source_file": "2020.md"}
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edeb70e1-9983-4e85-8f3d-3660aa82513f
Fixed #12293 allow push predicate when subquery contains with clause. #12663 ( Winter Zhang ). Fixed #10572 fix bloom filter index with const expression. #12659 ( Winter Zhang ). Fixed SIGSEGV in StorageKafka when broker is unavailable (and not only). #12658 ( Azat Khuzhin ). Fixed race condition in ext...
{"source_file": "2020.md"}
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4950f5f7-12a4-49a2-9aed-901fcb21e065
Fixed potential infinite loop in greatCircleDistance , geoDistance . This fixes #12117 . #12137 ( alexey-milovidov ). Avoid There is no query exception for materialized views with joins or with subqueries attached to system logs (system.query_log, metric_log, etc) or to engine=Buffer underlying table. #12120 ...
{"source_file": "2020.md"}
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55c252c5-fd7d-49aa-af32-70031d92276f
Fixed wrong result for if() with NULLs in condition. #11807 ( Artem Zuikov ). Parse metadata stored in zookeeper before checking for equality. #11739 ( Azat Khuzhin ). Fixed LIMIT n WITH TIES usage together with ORDER BY statement, which contains aliases. #11689 ( Anton Popov ). Fix potential read of ...
{"source_file": "2020.md"}
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c637e00f-141a-4548-bdf7-054d74db4b76
Fix trivial error in log message about "Mark cache size was lowered" at server startup. This closes #11399 . #11589 ( alexey-milovidov ). Fix error Size of offsets does not match size of column for queries with PREWHERE column in (subquery) and ARRAY JOIN . #11580 ( Nikolai Kochetov ). All queries in HTTP...
{"source_file": "2020.md"}
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af1031d9-37bc-4a61-a067-a2f10f7ba180
Fix crash in quantilesExactWeightedArray . #11337 ( Nikolai Kochetov ). Now merges stopped before change metadata in ALTER queries. #11335 ( alesapin ). Make writing to MATERIALIZED VIEW with setting parallel_view_processing = 1 parallel again. Fixes #10241 . #11330 ( Nikolai Kochetov ). Fix visitPa...
{"source_file": "2020.md"}
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cbad85c7-4d85-4d59-8eac-935647c7abfd
Fix excessive reserving of threads for simple queries (optimization for reducing the number of threads, which was partly broken after changes in pipeline). #11114 ( Azat Khuzhin ). Fix predicates optimization for distributed queries ( enable_optimize_predicate_expression=1 ) for queries with HAVING section (i.e. ...
{"source_file": "2020.md"}
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452e6bce-da31-4b97-b6f0-9f1b6299b060
Fixed combinator - OrNull and -OrDefault when combined with -State . #10741 ( hcz ). Fixed crash in generateRandom with nested types. Fixes #10583 . #10734 ( Nikolai Kochetov ). Fixed data corruption for LowCardinality(FixedString) key column in SummingMergeTree which could have happened after merge....
{"source_file": "2020.md"}
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ed9ae8ca-d4e3-4bde-bcc3-09f19eb58442
Added some improvements in printing diagnostic info in input formats. Fixes #10204 . #10418 ( tavplubix ). Added CA certificates to clickhouse-server docker image. #10476 ( filimonov ). Bug fix {#bug-fix-42} Fix error the BloomFilter false positive must be a double number between 0 and 1 #10551 . #10...
{"source_file": "2020.md"}
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6d60e0dd-14af-4f00-8a3b-8492aa5abcd2
ClickHouse release v20.3.7.46, 2020-04-17 {#clickhouse-release-v203746-2020-04-17} Bug Fix {#bug-fix-44} Fix Logical error: CROSS JOIN has expressions error for queries with comma and names joins mix. #10311 ( Artem Zuikov ). Fix queries with max_bytes_before_external_group_by . #10302 ( Artem Zuikov ). ...
{"source_file": "2020.md"}
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ff7d5d26-5f0b-407d-a271-5dd2eabf84e9
Fix some kinds of alters with compact parts. #10130 ( Anton Popov ). Fix incorrect index_granularity_bytes check while creating new replica. Fixes #10098 . #10121 ( alesapin ). Fix SIGSEGV on INSERT into Distributed table when its structure differs from the underlying tables. #10105 ( Azat Khuzhin ). Fix...
{"source_file": "2020.md"}
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f5c1a5c7-11e4-4786-b22d-89fb9c2dc1d4
Build/Testing/Packaging Improvement {#buildtestingpackaging-improvement-19} Fix integration test test_settings_constraints . #9962 ( Vitaly Baranov ). Removed dependency on clock_getres . #9833 ( alexey-milovidov ). ClickHouse release v20.3.5.21, 2020-03-27 {#clickhouse-release-v203521-2020-03-27} Bug...
{"source_file": "2020.md"}
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686f3103-8c5e-4d9a-8266-b8a51dc620e1
Add setting use_compact_format_in_distributed_parts_names which allows to write files for INSERT queries into Distributed table with more compact format. This fixes #9647 . #9653 ( alesapin ). It makes version 20.3 backward compatible again. ClickHouse release v20.3.2.1, 2020-03-12 {#clickhouse-release-v20...
{"source_file": "2020.md"}
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b58e8a25-13ad-4093-996d-60748624e93e
Require server to be restarted to apply the changes in logging configuration. This is a temporary workaround to avoid the bug where the server logs to a deleted log file (see #8696 ). #8707 ( Alexander Kuzmenkov ) The setting experimental_use_processors is enabled by default. This setting enables usage of the ne...
{"source_file": "2020.md"}
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beb17a96-868a-4d2b-8096-962a5fde11a7
Implement more functions of the H3 API: h3GetBaseCell , h3HexAreaM2 , h3IndexesAreNeighbors , h3ToChildren , h3ToString and stringToH3 #8938 ( Nico Mandery ) New setting introduced: max_parser_depth to control maximum stack size and allow large complex queries. This fixes #6681 and #7668 . #8647 ( ...
{"source_file": "2020.md"}
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50181107-2f5b-457a-a3de-1ab422da3ed9
DROP TEMPORARY TABLE now drops only temporary table. #8907 ( Vitaly Baranov ) Remove outdated partition when we shutdown the server or DETACH/ATTACH a table. #8602 ( Guillaume Tassery ) For how the default disk calculates the free space from data subdirectory. Fixed the issue when the amount of free space is ...
{"source_file": "2020.md"}
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c8d2d922-ff7e-4aa9-a155-6c5fc9d9a0a6
Make sure that FORMAT Null sends no data to the client. #8767 ( Alexander Kuzmenkov ) Fix bug that timestamp in LiveViewBlockInputStream will not updated. LIVE VIEW is an experimental feature. #8644 ( vxider ) #8625 ( vxider ) Fixed ALTER MODIFY TTL wrong behavior which did not allow to delete old TTL...
{"source_file": "2020.md"}
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0916147a-f064-4155-ac13-c788669bd2b2
Do not crash when using Template format with empty row template. #8785 ( Alexander Kuzmenkov ) Metadata files for system tables could be created in wrong place #8653 ( tavplubix ) Fixes #8581 . Fix data race on exception_ptr in cache dictionary #8303 . #9379 ( Nikita Mikhaylov ) Do not throw an exceptio...
{"source_file": "2020.md"}
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423a828b-3820-4bf7-90f1-016f32d58a51
Fix Parameter out of bound exception in some queries after PREWHERE optimizations. #8914 ( Baudouin Giard ) Fixed the case of mixed-constness of arguments of function arrayZip . #8705 ( alexey-milovidov ) When executing CREATE query, fold constant expressions in storage engine arguments. Replace empty data...
{"source_file": "2020.md"}
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89db54e4-5291-4666-998b-3fd775004e62
Fix bug leading to server termination when trying to use / drop Kafka table created with wrong parameters. #9513 ( filimonov ) Added workaround if OS returns wrong result for timer_create function. #8837 ( alexey-milovidov ) Fixed error in usage of min_marks_for_seek parameter. Fixed the error message whe...
{"source_file": "2020.md"}
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f22b2681-922c-4970-b105-63c8c7061297
Allow to put downloaded part to a disks/volumes according to TTL rules #8598 ( Vladimir Chebotarev ) For external MySQL dictionaries, allow to mutualize MySQL connection pool to "share" them among dictionaries. This option significantly reduces the number of connections to MySQL servers. #9409 ( Clément Rodriguez...
{"source_file": "2020.md"}
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f8323826-dc24-4b26-82c0-df11ec2f05cb
Fix progress over native client-server protocol, by send progress after final update (like logs). This may be relevant only to some third-party tools that are using native protocol. #9495 ( Azat Khuzhin ) Add a system metric tracking the number of client connections using MySQL protocol ( #9013 ). #9015 ( Eugene ...
{"source_file": "2020.md"}
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ea3ade82-a4f2-43db-9238-0f475e01f42c
Make "performance_introspection_and_logging" test reliable to random server stuck. This may happen in CI environment. See also #9515 #9528 ( alexey-milovidov ) Validate XML in style check. #9550 ( alexey-milovidov ) Fixed race condition in test 00738_lock_for_inner_table . This test relied on sleep. #9555 ...
{"source_file": "2020.md"}
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518f5280-469b-4150-a7ce-ad7e4131cf74
Add clickhouse-odbc driver into test images. This allows to test interaction of ClickHouse with ClickHouse via its own ODBC driver. #9348 ( filimonov ) Fix several bugs in unit tests. #9047 ( alesapin ) Enable -Wmissing-include-dirs GCC warning to eliminate all non-existing includes - mostly as a result of ...
{"source_file": "2020.md"}
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71cedabe-ec72-48df-a2f1-868ef7c93c14
Fix trivial error in log message about "Mark cache size was lowered" at server startup. This closes #11399 . #11589 ( alexey-milovidov ). Now clickhouse-server docker container will prefer IPv6 checking server aliveness. #11550 ( Ivan Starkov ). Fix memory leak when exception is thrown in the middle of aggrega...
{"source_file": "2020.md"}
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e1715a9b-088b-4735-b294-98d3f62eb5db
Fix bug when query speed estimation can be incorrect and the limit of min_execution_speed may not work or work incorrectly if the query is throttled by max_network_bandwidth , max_execution_speed or priority settings. Change the default value of timeout_before_checking_execution_speed to non-zero, because othe...
{"source_file": "2020.md"}
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dd2fe82c-ecfc-48a1-9cfe-b7aa13bbd6b7
Fix multiple usages of IN operator with the identical set in one query. #10686 ( Anton Popov ). Fix order of parameters in AggregateTransform constructor. #10667 ( palasonic1 ). Fix the lack of parallel execution of remote queries with distributed_aggregation_memory_efficient enabled. Fixes #10655 . #1066...
{"source_file": "2020.md"}
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b76e7607-aef8-43a1-930f-e535b386b5ab
Added a check of number and type of arguments when creating BloomFilter index #9623 . #10431 ( Winter Zhang ). Fixed the issue when a query with ARRAY JOIN , ORDER BY and LIMIT may return incomplete result. This fixes #10226 . #10427 ( alexey-milovidov ). Prefer fallback_to_stale_replicas over skip_...
{"source_file": "2020.md"}
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ec57ce6f-9a4b-471b-a42e-11517e7469c4
Convert blocks if structure does not match on INSERT into table with Distributed engine. #10135 ( Azat Khuzhin ). Fix SIGSEGV on INSERT into Distributed table when its structure differs from the underlying tables. #10105 ( Azat Khuzhin ). Fix possible rows loss for queries with JOIN and UNION ALL ....
{"source_file": "2020.md"}
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a29afa41-fcc0-4282-8b87-7dd0e326ef09
Fix possible exception Got 0 in totals chunk, expected 1 on client. It happened for queries with JOIN in case if right joined table had zero rows. Example: select * from system.one t1 join system.one t2 on t1.dummy = t2.dummy limit 0 FORMAT TabSeparated; . Fixes #9777 . #9823 ( Nikolai Kochetov ). Fix SIGSEG...
{"source_file": "2020.md"}
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88a0e505-f48b-4087-b770-d17bb13751fb
Fix data race at destruction of Poco::HTTPServer . It could happen when server is started and immediately shut down. #9468 ( Anton Popov ) Fix possible crash/wrong number of rows in LIMIT n WITH TIES when there are a lot of rows equal to n'th row. #9464 ( tavplubix ) Fix possible mismatched checksums with co...
{"source_file": "2020.md"}
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9840c7e4-d484-4047-8980-9f277308af14
#9217 (alesapin) Support "Processors" pipeline for system.numbers and system.numbers_mt. This also fixes the bug when max_execution_time is not respected. #7796 (KochetovNicolai) Fix wrong counting of DictCacheKeysRequestedFound metric. #9411 (nikitamikhaylov) Added a check for storage policy in ATTA...
{"source_file": "2020.md"}
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060c1f88-43ac-4593-8ba6-a8410f49c8ce
Changed return type of the function greatCircleDistance to Float32 because now the result of calculation is Float32 . #7993 ( alexey-milovidov ) Now it's expected that query parameters are represented in "escaped" format. For example, to pass string a<tab>b you have to write a\tb or a\<tab>b and respecti...
{"source_file": "2020.md"}
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93350bb3-5dea-44b3-8860-02477819cb5f
Add function bankerRound which performs banker's rounding. #8112 ( hcz ) Support more languages in embedded dictionary for region names: 'ru', 'en', 'ua', 'uk', 'by', 'kz', 'tr', 'de', 'uz', 'lv', 'lt', 'et', 'pt', 'he', 'vi'. #8189 ( alexey-milovidov ) Improvements in consistency of ANY JOIN logic. Now t1...
{"source_file": "2020.md"}
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ed0385ed-0b78-4e07-87ac-50c90cc9aec8
Added support for brotli ( br ) compression in file-related storages and table functions. This fixes #8156 . #8526 ( alexey-milovidov ) Add groupBit* functions for the SimpleAggregationFunction type. #8485 ( Guillaume Tassery ) Bug Fix {#bug-fix-60} Fix rename of tables with Distributed engine. Fix...
{"source_file": "2020.md"}
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c3e5564d-dbb7-4f4a-b104-a3be2499ea53
Now bloom filter can handle zero length arrays and does not perform redundant calculations. #8242 ( achimbab ) Fixed checking if a client host is allowed by matching the client host to host_regexp specified in users.xml . #8241 ( Vitaly Baranov ) Relax ambiguous column check that leads to false positives in ...
{"source_file": "2020.md"}
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0f304882-2a0d-4bd4-bcd6-d03771fc53c8
Fix crash in CREATE TABLE .. AS dictionary query. #8508 ( Azat Khuzhin ) Several improvements ClickHouse grammar in .g4 file. #8294 ( taiyang-li ) Fix bug that leads to crashes in JOIN s with tables with engine Join . This fixes #7556 #8254 #7915 #8100 . #8298 ( Artem Zuikov ) Fix redundant dic...
{"source_file": "2020.md"}
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b3dfda49-3f82-4d42-9206-249096e12462
Fix bug where user with empty allow_databases got access to all databases (and same for allow_dictionaries ). #7793 ( DeifyTheGod ) Fix client crash when server already disconnected from client. #8071 ( Azat Khuzhin ) Fix ORDER BY behaviour in case of sorting by primary key prefix and non primary key suffi...
{"source_file": "2020.md"}
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299f3506-0a9a-4753-a98c-4a6192aa8daa
Fix crash of merge operation when table contains SimpleAggregateFunction(LowCardinality) column. This fixes #8515 . #8522 ( Azat Khuzhin ) Restore support of all ICU locales and add the ability to apply collations for constant expressions. Also add language name to system.collations table. #8051 ( alesapin )...
{"source_file": "2020.md"}
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185dcff8-2a97-47c6-80ec-4c02b52ffc72
Simplify format of the header of data sending to a shard in a distributed query. #8044 ( Vitaly Baranov ) Live View table engine refactoring. #8519 ( vzakaznikov ) Add additional checks for external dictionaries created from DDL-queries. #8127 ( alesapin ) Fix error Column ... already exists while using ...
{"source_file": "2020.md"}
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4cd0a1e5-fb8b-44a7-b43f-776e61fd6837
Improved check for existing parts on different disks for *MergeTree table engines. Addresses #7660 . #8440 ( Vladimir Chebotarev ) Integration with AWS SDK for S3 interactions which allows to use all S3 features out of the box. #8011 ( Pavel Kovalenko ) Added support for subqueries in Live View tables....
{"source_file": "2020.md"}
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771c9035-0c51-4583-a4d6-0c97da940ddc
Speedup greatCircleDistance function and add performance tests for it. #7307 ( Olga Khvostikova ) Improved performance of function roundDown . #8465 ( alexey-milovidov ) Improved performance of max , min , argMin , argMax for DateTime64 data type. #8199 ( Vasily Nemkov ) Improved performance of so...
{"source_file": "2020.md"}
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91670712-905b-402a-8389-3ae1117b049c
Imported libc headers to contrib. It allows to make builds more consistent across various systems (only for x86_64-linux-gnu ). #5773 ( alexey-milovidov ) Remove -fPIC from some libraries. #8464 ( alexey-milovidov ) Clean CMakeLists.txt for curl. See https://github.com/ClickHouse/ClickHouse/pull/8011#iss...
{"source_file": "2020.md"}
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780aa972-1f62-446b-8f29-404c3c537626
Add performance test case to test that PREWHERE is worse than WHERE . #7768 ( Amos Bird ) Progress towards fixing one flacky test. #8621 ( alexey-milovidov ) Avoid MemorySanitizer report for data from libunwind . #8539 ( alexey-milovidov ) Updated libc++ to the latest version. #8324 ( alexey-milovi...
{"source_file": "2020.md"}
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2b9c4860-9d6d-4a7b-97a2-3c00c6bf9ba2
Dump cmake options in CI builds. #8273 ( Alexander Kuzmenkov ) Don't generate debug info for some fat libraries. #8271 ( alexey-milovidov ) Make log_to_console.xml always log to stderr, regardless of is it interactive or not. #8395 ( Alexander Kuzmenkov ) Removed some unused features from clickhouse-perf...
{"source_file": "2020.md"}
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be5c06b8-d11f-4363-9f9e-035f9f7e69af
slug: /whats-new/changelog/2024 sidebar_position: 3 sidebar_label: '2024' title: '2024 Changelog' description: 'Changelog for 2024' keywords: ['ClickHouse 2024', 'changelog 2024', 'release notes', 'version history', 'new features'] doc_type: 'changelog' Table of Contents {#table-of-contents} ClickHouse release v2...
{"source_file": "2024.md"}
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348330ab-62f1-4ff2-a535-93890471495f
Implement SYSTEM LOAD PRIMARY KEY command to load primary indexes for all parts of a specified table or for all tables if no table is specified. This will be useful for benchmarks and to prevent extra latency during query execution. #66252 #67733 ( ZAWA_ll ). Added a query that allows to attach MergeTree tabl...
{"source_file": "2024.md"}
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2cfde2ae-cf68-4cc9-9bd5-6d3ac53970d0
Now parallel_hash algorithm will be used (if applicable) when the join_algorithm setting is set to default . Two previous alternatives ( direct and hash ) are still considered when parallel_hash cannot be used. #70788 ( Nikita Taranov ). Add option to extract common expressions from WHERE and ON expres...
{"source_file": "2024.md"}
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a735d6ce-dd0d-4922-a31d-efd1cd735a7e
Dropping mark cache might take noticeable time if it is big. If we hold context mutex during this it block many other activities, even new client connection cannot be established until it is released. And holding this mutex is not actually required for synchronization, it is enough to have a local reference to the cach...
{"source_file": "2024.md"}
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9ea02cf4-85b3-4493-bcd7-33fc04b4815b
Better memory usage approximation of cached marks to reduce total memory usage of the cache. #72630 ( Antonio Andelic ). Add a new StartupScriptsExecutionState metric. The metric can have three values: 0 = startup scripts have not finished yet, 1 = startup scripts executed successfully, 2 = startup scripts failed...
{"source_file": "2024.md"}
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63bfc575-2a55-49ff-be56-b77dcc34becb
Fix serialization of Dynamic values in Pretty JSON formats. #71923 ( Pavel Kruglov ). Add inferred format name to create query in File / S3 / URL / HDFS / Azure engines. Previously the format name was inferred each time the server was restarted, and if the specified data files were removed, it led to errors d...
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13e69c19-0311-407a-9ce4-602b888f6917
Fix exception thrown in RemoteQueryExecutor when a user does not exist locally. #72759 ( Andrey Zvonov ). Fixed mutations with materialized _block_number column (if setting enable_block_number_column is enabled). #72854 ( Anton Popov ). Fix backup/restore with plain rewritable disk in case there are empty f...
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1a9ce251-0466-4d60-9094-19aa0d7f0d73
Rename filesystem cache setting skip_download_if_exceeds_query_cache to filesystem_cache_skip_download_if_exceeds_per_query_cache_write_limit . #71578 ( Kseniia Sumarokova ). Remove support for Enum as well as UInt128 and UInt256 arguments in deltaSumTimestamp . Remove support for Int8 , UInt8 , Int16 ...
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4503fccf-f9e6-4af3-a554-070f2dddff9d
Add support for staleness clause in the ORDER BY WITH FILL operator. #71151 ( Mikhail Artemenko ). Allow each authentication method to have its own expiration date, remove from user entity. #70090 ( Arthur Passos ). Added new functions parseDateTime64 , parseDateTime64OrNull and parseDateTime64OrZero . Comp...
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72b9f080-901b-42d4-9d1f-c56f1388ddce
Shrink to fit index_granularity array in memory to reduce memory footprint for MergeTree table engines family. #71595 ( alesapin ). Turn off filesystem cache setting boundary_alignment for non-disk read, which improves performance of reading from standalone remote files with caching. #71827 ( Kseniia Sumarokova...
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99b53aa1-37c4-4a9a-8b44-e9637ab9401c
Use Atomic database by default in clickhouse-local . Address items 1 and 5 from #50647 . Closes #44817 . #68024 ( Alexey Milovidov ). Exceptions break the HTTP protocol in order to alert the client about error. #68800 ( Sema Checherinda ). Report hosts running distributed DDL queries by creating replica_di...
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5c0650ee-49c7-48a7-a21c-3e4c7689a1f9
The command line applications will highlight syntax even for multi-statements. #71622 ( Alexey Milovidov ). Command-line applications will return non-zero exit codes on errors. In previous versions, the disks application returned zero on errors, and other applications returned zero for errors 256 ( PARTITION_ALRE...
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67b24b62-8ae0-4039-bdbf-89b250f4a288
Fix a crash and a leak in AggregateFunctionGroupArraySorted. #70820 ( Michael Kolupaev ). Add ability to override Content-Type by user headers in the URL engine. #70859 ( Artem Iurin ). Fix logical error in StorageS3Queue "Cannot create a persistent node in /processed since it already exists". #70984 ( Ksen...
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2ad4504c-91ae-4f36-8dd0-b4ea41ac1c2d
To avoid spamming the server logs, failing authentication attempts are now logged at level DEBUG instead of ERROR . #71405 ( Robert Schulze ). Fix crash in mongodb table function when passing wrong arguments (e.g. NULL ). #71426 ( Vladimir Cherkasov ). Fix crash with optimize_rewrite_array_exists_to_has. ...
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586ac1e3-7455-4082-b012-c97ce609da11
Fix the TOO_LARGE_ARRAY_SIZE exception caused when a column of arrayWithConstant evaluation is mistaken to cross the array size limit. #71894 ( Udi ). clickhouse-benchmark reported wrong metrics for queries taking longer than one second. #71898 ( Alexey Milovidov ). Fix data race between the progress indicator...
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2609dd63-55cf-4bd2-8d4f-685d1cc5697d
This is a fix for "zero-copy" replication, which is unsupported and will be removed entirely. Acquiring zero-copy shared lock before moving a part to zero-copy disk to prevent possible data loss if Keeper is unavailable. #71845 ( Aleksei Filatov ). ClickHouse release 24.10, 2024-10-31 {#a-id2410a-clickhouse-rele...
{"source_file": "2024.md"}
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545b5a2b-9ebe-43a4-9959-a0c8e24cb607
Add a builtin HTML page for visualizing merges which is available at the /merges path. #70821 ( Alexey Milovidov ). Add support for arrayUnion function. #68989 ( Peter Nguyen ). Allow parametrised SQL aliases. #50665 ( Anton Kozlov ). A new aggregate function quantileExactWeightedInterpolated , which i...
{"source_file": "2024.md"}
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686addc3-eb0a-4dc1-959a-ea388f7c059f
Support for the Dynamic type in most functions by executing them on internal types inside Dynamic . #69691 ( Pavel Kruglov ). Allow to read/write the JSON type as a binary string in RowBinary format under settings input_format_binary_read_json_as_string/output_format_binary_write_json_as_string . #70288 (...
{"source_file": "2024.md"}
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c0118e0d-0dea-4185-b0ac-7c63a19e8c21
Enable reading LowCardinality string columns from ORC . #69481 ( 李扬 ). Use LowCardinality for ProfileEvents in system logs such as part_log , query_views_log , filesystem_cache_log . #70152 ( Alexey Milovidov ). Improve performance of fromUnixTimestamp / toUnixTimestamp functions. #71042 ( kevinyh...
{"source_file": "2024.md"}
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e36bb2b5-d771-4d09-9e0d-5ac548b99e25
While parsing an Enum field from JSON , a string containing an integer will be interpreted as the corresponding Enum element. This closes #65119 . #66801 ( scanhex12 ). Allow TRIM -ing LEADING or TRAILING empty string as a no-op. Closes #67792 . #68455 ( Peter Nguyen ). Improve compatibility of ca...
{"source_file": "2024.md"}
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8902ce58-40a0-4da2-ad2e-129bef8efed6
Avoid spamming the logs with large HTTP response bodies in case of errors during inter-server communication. #70487 ( Vladimir Cherkasov ). Added a new setting max_parts_to_move to control the maximum number of parts that can be moved at once. #70520 ( Vladimir Cherkasov ). Limit the frequency of certain log ...
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ea294c69-964a-4de4-869e-9a4a06de889e
Fix type mismatch issue in sumMapFiltered when using signed arguments. #58408 ( Chen768959 ). Fix toHour-like conversion functions' monotonicity when optional time zone argument is passed. #60264 ( Amos Bird ). Relax supportsPrewhere check for Merge tables. This fixes #61064 . It was hardened unnecessari...
{"source_file": "2024.md"}
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069d336a-71fc-42c7-85a9-36870d93688d
Fix parsing for view's definers. #69985 ( pufit ). Fixed a bug when the timezone could change the result of the query with a Date or Date32 arguments. #70036 ( Yarik Briukhovetskyi ). Fixes Block structure mismatch for queries with nested views and WHERE condition. Fixes #66209 . #70054 ( Nikolai Ko...
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bbfe3c5c-7046-46b6-937b-d5a6d01b36be
Fix table creation with CREATE ... AS table_function(...) with database Replicated and unavailable table function source on secondary replica. #70511 ( Kseniia Sumarokova ). Ignore all output on async insert with wait_for_async_insert=1 . Closes #62644 . #70530 ( Konstantin Bogdanov ). Ignore frozen_metad...
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3c5ee208-f2eb-4a7a-9a36-706fa240760a
When the setting print_pretty_type_names is enabled, it will print Tuple data type in a pretty form in SHOW CREATE TABLE statements, formatQuery function, and in the interactive mode in clickhouse-client and clickhouse-local . In previous versions, this setting was only applied to DESCRIBE queries and toT...
{"source_file": "2024.md"}
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0dddc007-99d4-4bd9-8a5f-e6b42db997ab
Add new function arrayZipUnaligned for spark compatibility (which is named arrays_zip in Spark), which allowed unaligned arrays based on original arrayZip . #69030 ( 李扬 ). Added cp / mv commands for the keeper client command line application which atomically copies/moves node. #69034 ( Mikhail Artemenko )....
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