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41ae9034-d944-484c-aafa-265aac616160
Show MaterializeMySQL tables in system.parts . #19770 ( Stig Bakken ). Add separate config directive for Buffer profile. #19721 ( Azat Khuzhin ). Move conditions that are not related to JOIN to WHERE clause. #18720 . #19685 ( hexiaoting ). Add ability to throttle INSERT into Distributed based on amoun...
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80323f24-6d4c-4d7a-9bb0-7082c438c82a
Block parallel insertions into storage join. #21009 ( vdimir ). Fixed behaviour, when ALTER MODIFY COLUMN created mutation, that will knowingly fail. #21007 ( Anton Popov ). Closes #9969 . Fixed Brotli http compression error, which reproduced for large data sizes, slightly complicated structure and with json...
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f2be7fa0-eae6-4b1a-8336-ffc9b176abe4
Fixed the behavior when in case of broken JSON we tried to read the whole file into memory which leads to exception from the allocator. Fixes #19719 . #20286 ( Nikita Mikhaylov ). Fix exception during vertical merge for MergeTree table engines family which don't allow to perform vertical merges. Fixes #20259 . ...
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3fa179da-8e3d-42ae-9d7b-823bf0b8eee1
Fix some of the issues found by Coverity. See #19964 . #20010 ( alexey-milovidov ). Allow to start up with modified binary under gdb. In previous version if you set up breakpoint in gdb before start, server will refuse to start up due to failed integrity check. #21258 ( alexey-milovidov ). Add a test for diffe...
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84573bd0-f630-4814-8427-da1862735306
Added functions parseDateTimeBestEffortUSOrZero , parseDateTimeBestEffortUSOrNull . #19712 ( Maksim Kita ). Add sign math function. #19527 ( flynn ). Add information about used features (functions, table engines, etc) into system.query_log. #18495 . #19371 ( Kseniia Sumarokova ). Function formatDateTi...
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84c227a0-b80e-4c5d-970c-2a9f5b132c9a
Improvement {#improvement-9} SELECT count() FROM table now can be executed if only one any column can be selected from the table . This PR fixes #10639 . #18233 ( Vitaly Baranov ). Set charset to utf8mb4 when interacting with remote MySQL servers. Fixes #19795 . #19800 ( alexey-milovidov ). S3 table ...
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3f0870c4-51be-4e27-9582-fdc18ded8758
Add metrics for MergeTree parts (Wide/Compact/InMemory) types. #19381 ( Azat Khuzhin ). Allow docker to be executed with arbitrary uid. #19374 ( filimonov ). Fix wrong alignment of values of IPv4 data type in Pretty formats. They were aligned to the right, not to the left. This closes #19184 . #19339 ( ale...
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0e22fc7e-1e92-4111-909c-ada99c9cc1ba
Added support for WITH ... [AND] [PERIODIC] REFRESH [interval_in_sec] clause when creating LIVE VIEW tables. #14822 ( vzakaznikov ). Restrict MODIFY TTL queries for MergeTree tables created in old syntax. Previously the query succeeded, but actually it had no effect. #19064 ( Anton Popov ). Bug Fix {#...
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139bc97d-82a4-4a83-9009-e4ffcce22588
Fix issue in merge tree data writer which can lead to marks with bigger size than fixed granularity size. Fixes #18913 . #19123 ( alesapin ). Fix startup bug when clickhouse was not able to read compression codec from LowCardinality(Nullable(...)) and throws exception Attempt to read after EOF . Fixes #18340 ....
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e8c9f867-42c0-426d-b0cb-cb79d2f06189
Fix clickhouse-client abort exception while executing only select . #19790 ( taiyang-li ). Build/Testing/Packaging Improvement {#buildtestingpackaging-improvement-9} Run SQLancer (logical SQL fuzzer) in CI. #19006 ( Ilya Yatsishin ). Query Fuzzer will fuzz newly added tests more extensively. This close...
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6461722d-a4f5-4c11-9c38-23e906c0892c
Fix wrong result of function neighbor for LowCardinality argument. Fixes #10333 . #19617 ( Nikolai Kochetov ). Fix use-after-free of the CompressedWriteBuffer in Connection after disconnect. #19599 ( Azat Khuzhin ). DROP/DETACH TABLE table ON CLUSTER cluster SYNC query might hang, it's fixed. Fixes #1956...
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91e69711-e5a9-45aa-aa5c-d9dadb40ff68
Restrict ALTER MODIFY SETTING from changing storage settings that affects data parts ( write_final_mark and enable_mixed_granularity_parts ). #18306 ( Amos Bird ). Set insert_quorum_parallel to 1 by default. It is significantly more convenient to use than "sequential" quorum inserts. But if you rely to sequen...
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b26ee8f3-b87e-47d7-a869-14d59cb15345
IP Dictionary supports IPv4 / IPv6 types directly. #17571 ( vdimir ). IP Dictionary supports key fetching. Resolves #18241 . #18480 ( vdimir ). Add *.zst compression/decompression support for data import and export. It enables using *.zst in file() function and Content-encoding: zstd in HTTP client...
{"source_file": "2021.md"}
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0a00c1e1-c27b-4c24-beac-80f2c5fe44f5
Add a new setting insert_distributed_one_random_shard = 1 to allow insertion into multi-sharded distributed table without any distributed key. #18294 ( Amos Bird ). Add settings min_compress_block_size and max_compress_block_size to MergeTreeSettings, which have higher priority than the global settings and ta...
{"source_file": "2021.md"}
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b63a1fa4-a58d-4d4f-a51e-17a6d80c865b
EXPLAIN AST now support queries other then SELECT . #18136 ( taiyang-li ). Experimental Feature {#experimental-feature-8} Added functions for calculation of minHash and simHash of text n-grams and shingles. They are intended for semi-duplicate search. Also functions bitHammingDistance and tupleHammingDis...
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e3c22eb5-963e-4486-9237-0995b58d1025
Fix max_distributed_connections (affects prefer_localhost_replica = 1 and max_threads != max_distributed_connections ). #17848 ( Azat Khuzhin ). Adaptive choice of single/multi part upload when sending data to S3. Single part upload is controlled by a new setting max_single_part_upload_size . #17934 ( Pavel K...
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d2b6059c-50b1-4947-af4f-82a0f51072a8
Allow column transformer EXCEPT to accept a string as regular expression matcher. This resolves #18685 . #18699 ( Amos Bird ). Fix SimpleAggregateFunction in SummingMergeTree. Now it works like AggregateFunction. In previous versions values were summed together regardless to the aggregate function. This fixes ...
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a8a250c8-f08f-4342-ad5c-d2026400984f
Forcibly removing empty or bad metadata files from filesystem for DiskS3. S3 is an experimental feature. #17935 ( Pavel Kovalenko ). Access control: allow_introspection_functions=0 prohibits usage of introspection functions but doesn't prohibit giving grants for them anymore (the grantee will need to set allow_i...
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34063c1b-d618-4b7d-a1ba-8e0857bdacc6
Fix parsing of SETTINGS clause of the INSERT ... SELECT ... SETTINGS query. #17414 ( Azat Khuzhin ). Correctly account memory in RadixSort. #17412 ( Nikita Mikhaylov ). Add eof check in receiveHello in server to prevent getting Attempt to read after eof exception. #17365 ( Kruglov Pavel ). Avoid possi...
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953e58df-a6df-464b-b22e-117e5c0d554b
Fix bug in merge tree data writer which can lead to marks with bigger size than fixed granularity size. Fixes #18913 . #19123 ( alesapin ). Fix startup bug when clickhouse was not able to read compression codec from LowCardinality(Nullable(...)) and throws exception Attempt to read after EOF . Fixes #18340 . ...
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86a6413c-ccf8-4149-b6e2-e5fdb8026a17
Fix minor issue with logging. #18717 ( sundyli ). Fix removing of empty parts in ReplicatedMergeTree tables, created with old syntax. Fixes #18582 . #18614 ( Anton Popov ). Fix previous bug when date overflow with different values. Strict Date value limit to "2106-02-07", cast date > "2106-02-07" to value 0....
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ad6e9014-aa30-4686-8660-5dae71bd8170
Fix Unknown setting profile error on attempt to set settings profile. #18167 ( tavplubix ). Fix error when query MODIFY COLUMN ... REMOVE TTL doesn't actually remove column TTL. #18130 ( alesapin ). Fixed std::out_of_range: basic_string in S3 URL parsing. #18059 ( Vladimir Chebotarev ). Fix comparison...
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df41c615-5e6f-4450-96f3-f17608cdb34f
Fixed high CPU usage in background tasks of *MergeTree tables. #17416 ( tavplubix ). Fix possible crash while reading from JOIN table with LowCardinality types. Fixes #17228 . #17397 ( Nikolai Kochetov ). Replication from MySQL (experimental feature): Fixes #16835 try fix miss match header with MySQL SHO...
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ce98c7be-597f-469f-b7c8-2df5a5500033
Simplify Sys/V init script. It was not working on Ubuntu 12.04 or older. #17428 ( alexey-milovidov ). Multiple improvements in ./clickhouse install script. #17421 ( alexey-milovidov ). Now ClickHouse can pretend to be a fake ZooKeeper. Currently, storage implementation is just stored in-memory hash-table, a...
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7cdc22be-8b48-42e5-8e96-5f9f1cf132d9
If server was terminated by OOM killer, print message in log. #13516 ( alexey-milovidov ). PODArray: Avoid call to memcpy with (nullptr, 0) arguments (Fix UBSan report). This fixes #18525 . #18526 ( alexey-milovidov ). Minor improvement for path concatenation of zookeeper paths inside DDLWorker. #17767 ( Bha...
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1eb111a8-a0c3-4b20-bbc5-4cb8aa0e38de
slug: /whats-new/changelog/2020 sidebar_position: 7 sidebar_label: '2020' title: '2020 Changelog' description: 'Changelog for 2020' doc_type: 'changelog' keywords: ['ClickHouse 2020', 'changelog 2020', 'release notes', 'version history', 'bug fixes'] ClickHouse release 20.12 {#clickhouse-release-2012} ClickHouse ...
{"source_file": "2020.md"}
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2480bb9f-8e94-4a80-93cb-bf7ecff3cbe1
ClickHouse release v20.12.3.3-stable, 2020-12-13 {#clickhouse-release-v201233-stable-2020-12-13} Backward Incompatible Change {#backward-incompatible-change} Enable use_compact_format_in_distributed_parts_names by default (see the documentation for the reference). #16728 ( Azat Khuzhin ). Accept user settin...
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63a16427-20cc-4269-a963-1835409dfddd
fix incorrect initialization of max_compress_block_size of MergeTreeWriterSettings with min_compress_block_size . #17833 ( flynn ). Exception message about max table size to drop was displayed incorrectly. #17764 ( alexey-milovidov ). Fixed possible segfault when there is not enough space when inserting into...
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80c95a0f-4312-4aea-a160-ca433357c433
Bug unfinished implementation for funciton fuzzBits, related issue: #16980 . #17051 ( hexiaoting ). Fix LLVM's libunwind in the case when CFA register is RAX. This is the bug in LLVM's libunwind . We already have workarounds for this bug. #17046 ( alexey-milovidov ). Avoid unnecessary network errors for rem...
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8281d956-b3a0-475b-936d-bbf3b53b4cef
Fix inconsistent behavior caused by select_sequential_consistency for optimized trivial count query and system.tables. #16309 ( Hao Chen ). Improvement {#improvement} Remove empty parts after they were pruned by TTL, mutation, or collapsing merge algorithm. #16895 ( Anton Popov ). Enable compact format ...
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a8c1be41-a988-463c-9bbf-acad900123ba
Allow reinterpretAs* functions to work for integers and floats of the same size. Implements 16640 . #16657 ( flynn ). Now, <auxiliary_zookeepers> configuration can be changed in config.xml and reloaded without server startup. #16627 ( Amos Bird ). Support SNI in https connections to remote resources. Thi...
{"source_file": "2020.md"}
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cff4b51c-a03f-4c08-bd17-c461465f6cba
Improvements in test coverage building images. #17233 ( alesapin ). Update embedded timezone data to version 2020d (also update cctz to the latest master). #17204 ( filimonov ). Fix UBSan report in Poco. This closes #12719 . #16765 ( alexey-milovidov ). Do not instrument 3rd-party libraries with UBSan. #1...
{"source_file": "2020.md"}
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788428da-5495-421b-9cb4-028bb63b5a09
Fix error Cannot convert column now64() because it is constant but values of constants are different in source and result . Continuation of #7156 . #19316 ( Nikolai Kochetov ). Fix bug when concurrent ALTER and DROP queries may hang while processing ReplicatedMergeTree table. #19237 ( alesapin ). Fix infi...
{"source_file": "2020.md"}
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e2003eda-f875-4ca0-afe6-1e8b63cc9a5c
Fix possible Pipeline stuck error while using ORDER BY after subquery with RIGHT or FULL join. #18550 ( Nikolai Kochetov ). Fix bug which may lead to ALTER queries hung after corresponding mutation kill. Found by thread fuzzer. #18518 ( alesapin ). Disable write with AIO during merges because it can l...
{"source_file": "2020.md"}
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80a8e868-3ad5-4645-8dfd-ee17ce0ceb29
Fixed key comparison between Enum and Int types. This fixes #17989 . #18214 ( Amos Bird ). Fixed unique key convert crash in MaterializeMySQL database engine. This fixes #18186 and fixes #16372 #18211 ( Winter Zhang ). Fixed std::out_of_range: basic_string in S3 URL parsing. #18059 ( Vladimir Chebota...
{"source_file": "2020.md"}
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deb3d081-577a-4594-8a9d-227e08aa4f7a
Fixed fuzzer-found bug in funciton fuzzBits . This fixes #16980 . #17051 ( hexiaoting ). Avoid unnecessary network errors for remote queries which may be cancelled while execution, like queries with LIMIT . #17006 ( Azat Khuzhin ). Fixed wrong result in big integers (128, 256 bit) when casting from double. ...
{"source_file": "2020.md"}
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a9ded6bd-4472-4bb2-b47e-ca9a3503801f
Restrict to use of non-comparable data types (like AggregateFunction ) in keys (Sorting key, Primary key, Partition key, and so on). #16601 ( alesapin ). Remove ANALYZE and AST queries, and make the setting enable_debug_queries obsolete since now it is the part of full featured EXPLAIN query. #16536 ( Iv...
{"source_file": "2020.md"}
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6a9678bb-8fc2-47b7-90db-48ed630c70b9
Added function untuple which is a special function which can introduce new columns to the SELECT list by expanding a named tuple. #16242 ( Nikolai Kochetov , Amos Bird ). Now we can provide identifiers via query parameters. And these parameters can be used as table objects or columns. #16594 ( Amos Bird ). A...
{"source_file": "2020.md"}
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286842a9-1982-4e0f-8095-d770e2ac4e60
Fix a bug when using MySQL Master -> MySQL Slave -> ClickHouse MaterializeMySQL Engine. MaterializeMySQL is an experimental feature. #16504 ( TCeason ). Specifically crafted argument of round function with Decimal was leading to integer division by zero. This fixes #13338 . #16451 ( alexey-milovidov ). F...
{"source_file": "2020.md"}
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5b3fa7a0-63f7-4348-ba68-23f844055ea7
Better diagnostics on parse errors in input data. Provide row number on Cannot read all data errors. #16644 ( alexey-milovidov ). Make the behaviour of minMap and maxMap more desireable. It will not skip zero values in the result. Fixes #16087 . #16631 ( Ildus Kurbangaliev ). Better update of ZooKeeper c...
{"source_file": "2020.md"}
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d9d29b0f-1711-4e69-9b42-80f795242ef7
Support for database_atomic_wait_for_drop_and_detach_synchronously / NO DELAY / SYNC for DROP DATABASE . #16127 ( Azat Khuzhin ). Add allow_nondeterministic_optimize_skip_unused_shards (to allow non deterministic like rand() or dictGet() in sharding key). #16105 ( Azat Khuzhin ). Fix memory_profiler_s...
{"source_file": "2020.md"}
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51e068a1-4afe-4640-b772-941eaf799212
Add flaky check for stateless tests. It will detect potentially flaky functional tests in advance, before they are merged. #16238 ( alesapin ). Use proper version for croaring instead of amalgamation. #16285 ( sundyli ). Improve generation of build files for ya.make build system (Arcadia). #16700 ( alexey...
{"source_file": "2020.md"}
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e648356a-24b3-4d0f-86c0-f2da26e777de
Fixed the issue when server can stop accepting connections in very rare cases. #17542 ( alexey-milovidov ). Fixed ALTER query hang when the corresponding mutation was killed on the different replica. This fixes #16953 . #17499 ( alesapin ). Fixed bug when mark cache size was underestimated by clickhouse. It ...
{"source_file": "2020.md"}
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e3f0a45f-457e-44cd-b83b-d27e08cc6f7a
Fixed uncontrolled growth of TDigest . #16680 ( hrissan ). Fixed remote query failure when using suffix if in Aggregate function. This fixes #16574 fixes #16231 #16610 ( Winter Zhang ). ClickHouse release v20.10.4.1-stable, 2020-11-13 {#clickhouse-release-v201041-stable-2020-11-13} Bug Fix {#bug-fix-...
{"source_file": "2020.md"}
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ff81db79-1c15-4b40-b5c4-76b90ea307dc
Add support for nested multiline comments /* comment /* comment */ */ in SQL. This conforms to the SQL standard. #14655 ( alexey-milovidov ). Added MergeTree settings ( max_replicated_merges_with_ttl_in_queue and max_number_of_merges_with_ttl_in_pool ) to control the number of merges with TTL in the background ...
{"source_file": "2020.md"}
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d5729989-2494-4f51-9c40-869d60cf7f11
Added format RawBLOB . It is intended for input or output a single value without any escaping and delimiters. This closes #15349 . #15364 ( alexey-milovidov ). Add the reinterpretAsUUID function that allows to convert a big-endian byte string to UUID. #15480 ( Alexander Kuzmenkov ). Implement force_data_sk...
{"source_file": "2020.md"}
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96fd19c8-e1c6-431f-a580-81082f68bc57
Supporting MySQL types: decimal (as ClickHouse Decimal ) and datetime with sub-second precision (as DateTime64 ). #11512 ( Vasily Nemkov ). Introduce event_time_microseconds field to system.text_log , system.trace_log , system.query_log and system.query_thread_log tables. #14760 ( Bharat Nallan ). ...
{"source_file": "2020.md"}
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066d6be3-846e-4160-902b-a42e401046db
MaterializeMySQL (experimental feature): Fix crash on create database failure. #15954 ( Winter Zhang ). Fixed DROP TABLE IF EXISTS failure with Table ... does not exist error when table is concurrently renamed (for Atomic database engine). Fixed rare deadlock when concurrently executing some DDL queries with m...
{"source_file": "2020.md"}
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aa254d22-95df-4e20-b4a8-0e5a070f2bf4
Fixed bug with S3 table function: region from URL was not applied to S3 client configuration. #15646 ( Vladimir Chebotarev ). Fix the order of destruction for resources in ReadFromStorage step of query plan. It might cause crashes in rare cases. Possibly connected with #15610 . #15645 ( Nikolai Kochetov ). S...
{"source_file": "2020.md"}
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2c445fd5-9c15-4b63-a7cc-aab8ec6ba953
Fix 'Unknown identifier' in GROUP BY when query has JOIN over Merge table. #15242 ( Artem Zuikov ). Fix instance crash when using joinGet with LowCardinality types. This fixes #15214 . #15220 ( Amos Bird ). Fix bug in table engine Buffer which does not allow to insert data of new structure into Buffer ...
{"source_file": "2020.md"}
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f4a492c1-716b-4967-8fee-a7bc7a6a373b
Fix a problem where the server may get stuck on startup while talking to ZooKeeper, if the configuration files have to be fetched from ZK (using the from_zk include option). This fixes #14814 . #14843 ( Alexander Kuzmenkov ). Fix wrong monotonicity detection for shrunk Int -> Int cast of signed types. It might...
{"source_file": "2020.md"}
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a6f8fcad-6d39-4985-91a4-b49422c7ad66
The function now allows an argument with timezone. This closes 15264 . #15285 ( flynn ). Do not allow connections to ClickHouse server until all scripts in /docker-entrypoint-initdb.d/ are executed. #15244 ( Aleksei Kozharin ). Added optimize setting to EXPLAIN PLAN query. If enabled, query plan level ...
{"source_file": "2020.md"}
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9f547c36-ec1e-4e99-8209-fe991380f948
Add an option to skip access checks for DiskS3 . s3 disk is an experimental feature. #14497 ( Pavel Kovalenko ). Speed up server shutdown process if there are ongoing S3 requests. #14496 ( Pavel Kovalenko ). SYSTEM RELOAD CONFIG now throws an exception if failed to reload and continues using the previous us...
{"source_file": "2020.md"}
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7471d008-0eaa-4fe4-aa58-cb19faa49fa6
Switch from clang-tidy-10 to clang-tidy-11 . #14922 ( alexey-milovidov ). Use LLVM's experimental pass manager by default. #15608 ( Danila Kutenin ). Don't allow any C++ translation unit to build more than 10 minutes or to use more than 10 GB or memory. This fixes #14925 . #15060 ( alexey-milovidov ). M...
{"source_file": "2020.md"}
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361b3bb2-bbfe-4ec7-986e-af11aac70cba
Fix debug assertion in bitShiftLeft() when called with negative big integer. #14697 ( Artem Zuikov ). ClickHouse release 20.9 {#clickhouse-release-209} ClickHouse release v20.9.7.11-stable, 2020-12-07 {#clickhouse-release-v209711-stable-2020-12-07} Performance Improvement {#performance-improvement-3} Fi...
{"source_file": "2020.md"}
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38430704-a8d2-4718-9088-01015d0d5fc5
Build/Testing/Packaging Improvement {#buildtestingpackaging-improvement-5} Update embedded timezone data to version 2020d (also update cctz to the latest master). #17204 ( filimonov ). ClickHouse release v20.9.6.14-stable, 2020-11-20 {#clickhouse-release-v209614-stable-2020-11-20} Improvement {#improvement-...
{"source_file": "2020.md"}
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db66f87d-cda0-4c9b-b875-af79a3f6a3da
Fix DROP TABLE for Distributed (racy with INSERT). #16409 ( Azat Khuzhin ). Fix processing of very large entries in replication queue. Very large entries may appear in ALTER queries if table structure is extremely large (near 1 MB). This fixes #16307 . #16332 ( alexey-milovidov ). Fixed the inconsistent behavi...
{"source_file": "2020.md"}
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838ba2b4-9da7-4595-9d3d-6afbb390f139
Fix incorrect empty result for query from Distributed table if query has WHERE , PREWHERE and GLOBAL IN . Fixes #15792 . #15933 ( Nikolai Kochetov ). Fix possible deadlocks in RBAC. #15875 ( Vitaly Baranov ). Fix exception Block structure mismatch in SELECT ... ORDER BY DESC queries which were execut...
{"source_file": "2020.md"}
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c522923a-65eb-41f5-bb13-6fbccda63acd
Significantly reduce memory usage in AggregatingInOrderTransform/optimize_aggregation_in_order. #15543 ( Azat Khuzhin ). Mutation might hang waiting for some non-existent part after MOVE or REPLACE PARTITION or, in rare cases, after DETACH or DROP PARTITION . It's fixed. #15537 ( tavplubix ). Fix bug whe...
{"source_file": "2020.md"}
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a66b9509-1172-4753-9e28-5ea80021807a
ClickHouse release v20.9.2.20, 2020-09-22 {#clickhouse-release-v209220-2020-09-22} Backward Incompatible Change {#backward-incompatible-change-3} When upgrading from versions older than 20.5, if rolling update is performed and cluster contains both versions 20.5 or greater and less than 20.5, if ClickHouse nodes ...
{"source_file": "2020.md"}
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4e5fcfce-df95-4332-acd8-9dd012db107b
Fix SIGSEGV for an attempt to INSERT into StorageFile(fd). #14887 ( Azat Khuzhin ). Fix rare error in SELECT queries when the queried column has DEFAULT expression which depends on the other column which also has DEFAULT and not present in select query and not exists on disk. Partially fixes #14531 . #14845...
{"source_file": "2020.md"}
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ec8b64f9-33ae-48eb-8c3d-9f69952d8b51
Disallow empty time_zone argument in toStartOf* type of functions. #14509 ( Bharat Nallan ). MySQL handler returns OK for queries like SET @@var = value . Such statement is ignored. It is needed because some MySQL drivers send SET @@ query for setup after handshake https://github.com/ClickHouse/ClickHouse/is...
{"source_file": "2020.md"}
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2ebbff10-e4d2-4ce2-b8ff-e5bba82362d7
Integration tests use default base config. All config changes are explicit with main_configs, user_configs and dictionaries parameters for instance. #13647 ( Ilya Yatsishin ). ClickHouse release 20.8 {#clickhouse-release-208} ClickHouse release v20.8.12.2-lts, 2021-01-16 {#clickhouse-release-v208122-lts-2021-01...
{"source_file": "2020.md"}
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75765cd4-afde-4634-b955-13732072475f
Fixed possible server crash after ALTER TABLE ... MODIFY COLUMN ... NewType when SELECT have WHERE expression on altering column and alter does not finished yet. #16968 ( Amos Bird ). Install script should always create subdirs in config folders. This is only relevant for Docker build with custom config. #16...
{"source_file": "2020.md"}
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aec09adb-823b-4062-82e5-e779d350a13f
ClickHouse release v20.8.5.45-lts, 2020-10-29 {#clickhouse-release-v208545-lts-2020-10-29} Bug Fix {#bug-fix-20} Fix double free in case of exception in function dictGet . It could have happened if dictionary was loaded with error. #16429 ( Nikolai Kochetov ). Fix group by with totals/rollup/cube modifers an...
{"source_file": "2020.md"}
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76ce3f30-e6ed-460e-8448-fd6aa2b2c873
Fix error Cannot find column which may happen at insertion into MATERIALIZED VIEW in case if query for MV containes ARRAY JOIN . #15717 ( Nikolai Kochetov ). Fixed too low default value of max_replicated_logs_to_keep setting, which might cause replicas to become lost too often. Improve lost replica recover...
{"source_file": "2020.md"}
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dd581462-8242-4769-9f48-69c4a443e083
Fix bug with event subscription in DDLWorker which rarely may lead to query hangs in ON CLUSTER . Introduced in #13450 . #15477 ( alesapin ). Report proper error when the second argument of boundingRatio aggregate function has a wrong type. #15407 ( detailyang ). Fix race condition during MergeTree table re...
{"source_file": "2020.md"}
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6922e439-8519-43ea-8faa-0f8757c203b3
ClickHouse release v20.8.3.18-stable, 2020-09-18 {#clickhouse-release-v208318-stable-2020-09-18} Bug Fix {#bug-fix-22} Fix the issue when some invocations of extractAllGroups function may trigger "Memory limit exceeded" error. This fixes #13383 . #14889 ( alexey-milovidov ). Fix SIGSEGV for an attempt to I...
{"source_file": "2020.md"}
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c33243cf-8be7-4dbd-a1d1-c522df596e8a
Remove support for the ODBCDriver input/output format. This was a deprecated format once used for communication with the ClickHouse ODBC driver, now long superseded by the ODBCDriver2 format. Resolves #13629 . #13847 ( hexiaoting ). When upgrading from versions older than 20.5, if rolling update is performed a...
{"source_file": "2020.md"}
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11db93a0-1522-4d86-9e4c-cfc23c77fe6b
Fix bug which can lead to wrong merges assignment if table has partitions with a single part. #14444 ( alesapin ). Stop query execution if exception happened in PipelineExecutor itself. This could prevent rare possible query hung. Continuation of #14334 . #14402 #14334 ( Nikolai Kochetov ). Fix crash durin...
{"source_file": "2020.md"}
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5d488147-a216-45d6-883f-89b79aed882b
Fix logging Settings.Names/Values when log_queries_min_type > QUERY_START. #13737 ( Azat Khuzhin ). Fixes /replicas_status endpoint response status code when verbose=1. #13722 ( javi santana ). Fix incorrect message in clickhouse-server.init while checking user and group. #13711 ( ylchou ). Do not optim...
{"source_file": "2020.md"}
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6328eaaa-9ebb-43e0-b76b-81a732b11367
Slightly better performance of Memory table if it was constructed from a huge number of very small blocks (that's unlikely). Author of the idea: Mark Papadakis . Closes #14043 . #14056 ( alexey-milovidov ). Conditional aggregate functions (for example: avgIf , sumIf , maxIf ) should return NULL when miss row...
{"source_file": "2020.md"}
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810a4ff5-0882-44b3-89f7-b50add6adcfc
Fix debug assertion when Decimal has too large negative exponent. Fixes #13188 . #13228 ( alexey-milovidov ). Added cache layer for DiskS3 (cache to local disk mark and index files). DiskS3 is an experimental feature. #13076 ( Pavel Kovalenko ). Fix readline so it dumps history to file now. #13600 ( Amos B...
{"source_file": "2020.md"}
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0eccf2c7-5f84-402e-8a94-97eb77dfc3e7
Improve generation of system.time_zones table during build. Closes #14209 . #14215 ( filimonov ). Build ClickHouse with the most fresh tzdata from package repository. #13623 ( alexey-milovidov ). Add the ability to write js-style comments in skip_list.json. #14159 ( alesapin ). Ensure that there is no copy...
{"source_file": "2020.md"}
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3ab48f5c-0576-4d55-b2dc-d85f39c256d1
Deprecate special printing of zero Date/DateTime values as 0000-00-00 and 0000-00-00 00:00:00 . #12442 ( alexey-milovidov ). The function groupArrayMoving* was not working for distributed queries. It's result was calculated within incorrect data type (without promotion to the largest type). The function group...
{"source_file": "2020.md"}
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acbecd7f-4c68-4d50-8a5b-f0063c3c320f
Add setting allow_non_metadata_alters which restricts to execute ALTER queries which modify data on disk. Disabled be default. Closes #11547 . #12635 ( alesapin ). A function formatRow is added to support turning arbitrary expressions into a string via given format. It's useful for manipulating SQL outputs a...
{"source_file": "2020.md"}
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4bb831f9-1946-4148-ac86-c4266e7ec9ec
Add range check for h3KRing function. This fixes #13633 . #13752 ( alexey-milovidov ). Fix race condition between DETACH and background merges. Parts may revive after detach. This is continuation of #8602 that did not fix the issue but introduced a test that started to fail in very rare cases, demonstrating th...
{"source_file": "2020.md"}
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c1c6dde9-0405-477f-8566-452367c666b8
Throw error on arrayJoin() function in JOIN ON section. #13330 ( Artem Zuikov ). Fix crash in LEFT ASOF JOIN with join_use_nulls=1 . #13291 ( Artem Zuikov ). Fix possible error Totals having transform was already added to pipeline in case of a query from delayed replica. #13290 ( Nikolai Kochetov ). ...
{"source_file": "2020.md"}
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138c2b6a-489a-450f-a9d6-bd6654cd34cd
Fix columns duplication for range hashed dictionary created from DDL query. This fixes #10605 . #12857 ( alesapin ). Fix unnecessary limiting for the number of threads for selects from local replica. #12840 ( Nikolai Kochetov ). Fix rare bug when ALTER DELETE and ALTER MODIFY COLUMN queries executed simult...
{"source_file": "2020.md"}
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fa354106-2540-483d-9c43-c42cb765b79a
Fix backwards compatibility in binary format of AggregateFunction(avg, ...) values. This fixes #12342 . #12486 ( alexey-milovidov ). Fix crash in JOIN with dictionary when we are joining over expression of dictionary key: t JOIN dict ON expr(dict.id) = t.id . Disable dictionary join optimisation for this case. ...
{"source_file": "2020.md"}
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f49cd0d2-11f1-4b63-8561-7848268a8b4a
Support TRUNCATE table without TABLE keyword. #12653 ( Winter Zhang ). Fix explain query format overwrite by default. This fixes #12541 . #12541 ( BohuTANG ). Allow to set JOIN kind and type in more standad way: LEFT SEMI JOIN instead of SEMI LEFT JOIN . For now both are correct. #12520 ( Artem Zuikov ). ...
{"source_file": "2020.md"}
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208b42b1-35bd-44b8-abac-0fe304964545
Push down LIMIT step for query plan (inside subqueries). #13016 ( Nikolai Kochetov ). Parallel primary key lookup and skipping index stages on parts, as described in #11564 . #12589 ( Ivan Babrou ). Converting String-type arguments of function "if" and "transform" into enum if set optimize_if_transform_stri...
{"source_file": "2020.md"}
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fdf25a6c-9d6f-477d-8763-429274ebdd5a
Added tests for RBAC functionality of SELECT privilege in TestFlows. #13061 ( Ritaank Tiwari ). Rerun some tests in fast test check. #12992 ( alesapin ). Fix MSan error in "rdkafka" library. This closes #12990 . Updated rdkafka to version 1.5 (master). #12991 ( alexey-milovidov ). Fix UBSan report in b...
{"source_file": "2020.md"}
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0b2b1036-3638-4674-ab2d-c7a6cd482641
Added storage RabbitMQ . #11069 ( Kseniia Sumarokova ). Implemented PostgreSQL-like ILIKE operator for #11710 . #12125 ( Mike ). Supported RIGHT and FULL JOIN with SET join_algorithm = 'partial_merge' . Only ALL strictness is allowed (ANY, SEMI, ANTI, ASOF are not). #12118 ( Artem Zuikov ). Added a fun...
{"source_file": "2020.md"}
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0308e091-1f52-4fbf-8bc3-bbde9b7577af
Fixed CAST(Nullable(String), Enum()) . #12745 ( Azat Khuzhin ). Fixed a performance with large tuples, which are interpreted as functions in IN section. The case when user write WHERE x IN tuple(1, 2, ...) instead of WHERE x IN (1, 2, ...) for some obscure reason. #12700 ( Anton Popov ). Fixed memory tra...
{"source_file": "2020.md"}
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db9209a0-25e5-4de6-a065-cf7837748548
Avoid exception when negative or floating point constant is used in WHERE condition for indexed tables. This fixes #11905 . #12384 ( alexey-milovidov ). Allowed to CLEAR column even if there are depending DEFAULT expressions. This fixes #12333 . #12378 ( alexey-milovidov ). Fix TOTALS/ROLLUP/CUBE for ag...
{"source_file": "2020.md"}
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4e596399-c988-4a5e-9a57-29e6fecf23ca
Cap max_memory_usage* limits to the process resident memory. #12182 ( Azat Khuzhin ). Fix dictGet arguments check during GROUP BY injective functions elimination. #12179 ( Azat Khuzhin ). Fixed the behaviour when SummingMergeTree engine sums up columns from partition key. Added an exception in case of expli...
{"source_file": "2020.md"}
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751f471f-5120-484b-8d85-3e0977c7b234
Fixed SIGSEGV in StorageKafka on DROP TABLE. #12075 ( Azat Khuzhin ). Fixed possible crash while using wrong type for PREWHERE . Fixes #12053 , #12060 . #12060 ( Nikolai Kochetov ). Fixed error Cannot capture column for higher-order functions with Tuple(LowCardinality) argument. Fixes #9766 . #12055 (...
{"source_file": "2020.md"}
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368e5697-0004-4552-9203-6d8c9c57e196
Implemented single part uploads for DiskS3 (experimental feature). #12026 ( Vladimir Chebotarev ). Experimental Feature {#experimental-feature-4} Added new in-memory format of parts in MergeTree -family tables, which stores data in memory. Parts are written on disk at first merge. Part will be created in in-...
{"source_file": "2020.md"}
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172c8f30-4aee-445c-800e-9280c5bd6ca3
Fixed wrong index analysis with functions. It could lead to pruning wrong parts, while reading from MergeTree tables. Fixes #13060 . Fixes #12406 . #13081 ( Anton Popov ). Fixed unnecessary limiting for the number of threads for selects from local replica. #12840 ( Nikolai Kochetov ). Fixed performance with...
{"source_file": "2020.md"}
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11faecde-692d-4c7a-a9cc-8f0daa38c6db
Fixed SIGSEGV if there is an message with error in the middle of the batch in Kafka Engine. #12302 ( Azat Khuzhin ). Fixed the behaviour when SummingMergeTree engine sums up columns from partition key. Added an exception in case of explicit definition of columns to sum which intersects with partition key column...
{"source_file": "2020.md"}
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0b15368c-fe10-4253-8059-5ddaa1f427aa
Remove experimental_use_processors setting. It is enabled by default. #10924 ( Nikolai Kochetov ). Update zstd to 1.4.4. It has some minor improvements in performance and compression ratio. If you run replicas with different versions of ClickHouse you may see reasonable error messages Data after merge is not b...
{"source_file": "2020.md"}
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07c36a2e-3b69-42a1-bd4e-add0997dd799
Added syntax highligting to clickhouse-client using replxx . #11422 ( Tagir Kuskarov ). minMap and maxMap functions were added. #11603 ( Ildus Kurbangaliev ). Add the system.asynchronous_metric_log table that logs historical metrics from system.asynchronous_metrics . #11588 ( Alexander Kuzmenkov ). ...
{"source_file": "2020.md"}
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eeef35ea-317e-48f8-9835-94cfcdb83909
Resolved #7224 : added FailedQuery , FailedSelectQuery and FailedInsertQuery metrics to system.events table. #11151 ( Nikita Orlov ). Add more jemalloc statistics to system.asynchronous_metrics , and ensure that we see up-to-date values for them. #11748 ( Alexander Kuzmenkov ). Allow to specify defau...
{"source_file": "2020.md"}
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9b0cca53-3244-4e43-9707-51cdfee2aa3d
Now replicated fetches will be cancelled during metadata alter. #11744 ( alesapin ). Parse metadata stored in zookeeper before checking for equality. #11739 ( Azat Khuzhin ). Fixed LOGICAL_ERROR caused by wrong type deduction of complex literals in Values input format. #11732 ( tavplubix ). Fix ORDER BY .....
{"source_file": "2020.md"}
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4996dc3b-845a-41b9-b12b-ca93cb480f6c
Fixed rare segfault in SHOW CREATE TABLE Fixes #11490 . #11579 ( tavplubix ). All queries in HTTP session have had the same query_id. It is fixed. #11578 ( tavplubix ). Now clickhouse-server docker container will prefer IPv6 checking server aliveness. #11550 ( Ivan Starkov ). Fix the error Data compress...
{"source_file": "2020.md"}
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97967a7e-664c-4ac9-8209-4dce978b95cb
Fix visitParamExtractRaw when extracted JSON has strings with unbalanced { or [. #11318 ( Ewout ). Fix very rare race condition in ThreadPool. #11314 ( alexey-milovidov ). Fix insignificant data race in clickhouse-copier . Found by integration tests. #11313 ( alexey-milovidov ). Fix potential uninitializ...
{"source_file": "2020.md"}
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09c6981e-8808-4038-915b-79b08db04ef4
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 ). Remove logging from mutation finalization task if nothing was finalized. #11109 ( alesapin ). Fixed deadlock during server startup ...
{"source_file": "2020.md"}
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c669f04c-75a2-44fb-b728-cdd7dbe069a0
Fix backward compatibility with tuples in Distributed tables. #10889 ( Anton Popov ). Fix SIGSEGV in StringHashTable (if such key does not exist). #10870 ( Azat Khuzhin ). Fixed WATCH hangs after LiveView table was dropped from database with Atomic engine. #10859 ( tavplubix ). Fixed bug in Replicate...
{"source_file": "2020.md"}
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ce867bd6-e832-4e64-8dc3-17082072f089
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 . #10664 ( Nikolai Kochetov ). Fix possible incorrect number of rows for queries with LIMIT . Fixes #105...
{"source_file": "2020.md"}
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