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Fixed changelog and documentation
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Alexey Milovidov
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CHANGELOG.md
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CHANGELOG.md
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### ClickHouse release v20.1.6.30, 2020-03-05
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#### Bug Fix
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#### Bug Fix
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* Fix data incompatibility when compressed with `T64` codec.
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* Fix data incompatibility when compressed with `T64` codec.
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[#9039](https://github.com/ClickHouse/ClickHouse/pull/9039) [(abyss7)](https://github.com/abyss7)
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* Fix order of ranges while reading from MergeTree table in one thread. Fixes [#8964](https://github.com/ClickHouse/ClickHouse/issues/8964).
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* Fix order of ranges while reading from MergeTree table in one thread. Fixes [#8964](https://github.com/ClickHouse/ClickHouse/issues/8964).
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[#9050](https://github.com/ClickHouse/ClickHouse/pull/9050) [(CurtizJ)](https://github.com/CurtizJ)
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* Fix possible segfault in `MergeTreeRangeReader`, while executing `PREWHERE`. Fixes [#9064](https://github.com/ClickHouse/ClickHouse/issues/9064).
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* Fix possible segfault in `MergeTreeRangeReader`, while executing `PREWHERE`. Fixes [#9064](https://github.com/ClickHouse/ClickHouse/issues/9064).
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[#9106](https://github.com/ClickHouse/ClickHouse/pull/9106) [(CurtizJ)](https://github.com/CurtizJ)
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* Fix `reinterpretAsFixedString` to return `FixedString` instead of `String`.
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* Fix `reinterpretAsFixedString` to return `FixedString` instead of `String`.
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[#9052](https://github.com/ClickHouse/ClickHouse/pull/9052) [(oandrew)](https://github.com/oandrew)
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* Fix `joinGet` with nullable return types. Fixes [#8919](https://github.com/ClickHouse/ClickHouse/issues/8919)
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* Fix `joinGet` with nullable return types. Fixes [#8919](https://github.com/ClickHouse/ClickHouse/issues/8919)
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[#9014](https://github.com/ClickHouse/ClickHouse/pull/9014) [(amosbird)](https://github.com/amosbird)
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* Fix fuzz test and incorrect behaviour of bitTestAll/bitTestAny functions.
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[#9143](https://github.com/ClickHouse/ClickHouse/pull/9143) [(alexey-milovidov)](https://github.com/alexey-milovidov)
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* Fix the behaviour of match and extract functions when haystack has zero bytes. The behaviour was wrong when haystack was constant. Fixes [#9160](https://github.com/ClickHouse/ClickHouse/issues/9160)
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* Fix the behaviour of match and extract functions when haystack has zero bytes. The behaviour was wrong when haystack was constant. Fixes [#9160](https://github.com/ClickHouse/ClickHouse/issues/9160)
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[#9163](https://github.com/ClickHouse/ClickHouse/pull/9163) [(alexey-milovidov)](https://github.com/alexey-milovidov)
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* Fixed execution of inversed predicates when non-strictly monotinic functional index is used. Fixes [#9034](https://github.com/ClickHouse/ClickHouse/issues/9034)
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* Fixed execution of inversed predicates when non-strictly monotinic functional index is used. Fixes [#9034](https://github.com/ClickHouse/ClickHouse/issues/9034)
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[#9223](https://github.com/ClickHouse/ClickHouse/pull/9223) [(Akazz)](https://github.com/Akazz)
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* Allow to rewrite `CROSS` to `INNER JOIN` if there's `[NOT] LIKE` operator in `WHERE` section. Fixes [#9191](https://github.com/ClickHouse/ClickHouse/issues/9191)
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* Allow to rewrite `CROSS` to `INNER JOIN` if there's `[NOT] LIKE` operator in `WHERE` section. Fixes [#9191](https://github.com/ClickHouse/ClickHouse/issues/9191)
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[#9229](https://github.com/ClickHouse/ClickHouse/pull/9229) [(4ertus2)](https://github.com/4ertus2)
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* Allow first column(s) in a table with Log engine be an alias.
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[#9231](https://github.com/ClickHouse/ClickHouse/pull/9231) [(abyss7)](https://github.com/abyss7)
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@ -28,35 +28,35 @@
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[#9251](https://github.com/ClickHouse/ClickHouse/pull/9251) [(4ertus2)](https://github.com/4ertus2)
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* Improve `ALTER MODIFY/ADD` queries logic. Now you cannot `ADD` column without type, `MODIFY` default expression doesn't change type of column and `MODIFY` type doesn't loose default expression value. Fixes [#8669](https://github.com/ClickHouse/ClickHouse/issues/8669).
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[#9227](https://github.com/ClickHouse/ClickHouse/pull/9227) [(alesapin)](https://github.com/alesapin)
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* Fix mutations finalization, when already done mutation can have status is_done=0.
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* Fix mutations finalization, when already done mutation can have status is_done=0.
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[#9217](https://github.com/ClickHouse/ClickHouse/pull/9217) [(alesapin)](https://github.com/alesapin)
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* Support "Processors" pipeline for system.numbers and system.numbers_mt. This also fixes the bug when `max_execution_time` is not respected.
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[#7796](https://github.com/ClickHouse/ClickHouse/pull/7796) [(KochetovNicolai)](https://github.com/KochetovNicolai)
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* Fix wrong counting of `DictCacheKeysRequestedFound` metric.
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* Fix wrong counting of `DictCacheKeysRequestedFound` metric.
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[#9411](https://github.com/ClickHouse/ClickHouse/pull/9411) [(nikitamikhaylov)](https://github.com/nikitamikhaylov)
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* Added a check for storage policy in `ATTACH PARTITION FROM`, `REPLACE PARTITION`, `MOVE TO TABLE` which otherwise could make data of part inaccessible after restart and prevent ClickHouse to start.
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* Added a check for storage policy in `ATTACH PARTITION FROM`, `REPLACE PARTITION`, `MOVE TO TABLE` which otherwise could make data of part inaccessible after restart and prevent ClickHouse to start.
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[#9383](https://github.com/ClickHouse/ClickHouse/pull/9383) [(excitoon)](https://github.com/excitoon)
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* Fixed UBSan report in `MergeTreeIndexSet`. This fixes [#9250](https://github.com/ClickHouse/ClickHouse/issues/9250)
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* Fixed UBSan report in `MergeTreeIndexSet`. This fixes [#9250](https://github.com/ClickHouse/ClickHouse/issues/9250)
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[#9365](https://github.com/ClickHouse/ClickHouse/pull/9365) [(alexey-milovidov)](https://github.com/alexey-milovidov)
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* Fix possible datarace in BlockIO.
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[#9356](https://github.com/ClickHouse/ClickHouse/pull/9356) [(KochetovNicolai)](https://github.com/KochetovNicolai)
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* Support for `UInt64` numbers that don't fit in Int64 in JSON-related functions. Update `SIMDJSON` to master. This fixes [#9209](https://github.com/ClickHouse/ClickHouse/issues/9209)
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* Fix possible datarace in BlockIO.
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[#9356](https://github.com/ClickHouse/ClickHouse/pull/9356) [(KochetovNicolai)](https://github.com/KochetovNicolai)
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* Support for `UInt64` numbers that don't fit in Int64 in JSON-related functions. Update `SIMDJSON` to master. This fixes [#9209](https://github.com/ClickHouse/ClickHouse/issues/9209)
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[#9344](https://github.com/ClickHouse/ClickHouse/pull/9344) [(alexey-milovidov)](https://github.com/alexey-milovidov)
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* Fix the issue when the amount of free space is not calculated correctly if the data directory is mounted to a separate device. For default disk calculate the free space from data subdirectory. This fixes [#7441](https://github.com/ClickHouse/ClickHouse/issues/7441)
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* Fix the issue when the amount of free space is not calculated correctly if the data directory is mounted to a separate device. For default disk calculate the free space from data subdirectory. This fixes [#7441](https://github.com/ClickHouse/ClickHouse/issues/7441)
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[#9257](https://github.com/ClickHouse/ClickHouse/pull/9257) [(millb)](https://github.com/millb)
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* Fix the issue when TLS connections may fail with the message `OpenSSL SSL_read: error:14094438:SSL routines:ssl3_read_bytes:tlsv1 alert internal error and SSL Exception: error:2400006E:random number generator::error retrieving entropy.` Update OpenSSL to upstream master.
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[#8956](https://github.com/ClickHouse/ClickHouse/pull/8956) [(alexey-milovidov)](https://github.com/alexey-milovidov)
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* When executing `CREATE` query, fold constant expressions in storage engine arguments. Replace empty database name with current database. Fixes [#6508](https://github.com/ClickHouse/ClickHouse/issues/6508), [#3492](https://github.com/ClickHouse/ClickHouse/issues/3492). Also fix check for local address in ClickHouseDictionarySource.
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* When executing `CREATE` query, fold constant expressions in storage engine arguments. Replace empty database name with current database. Fixes [#6508](https://github.com/ClickHouse/ClickHouse/issues/6508), [#3492](https://github.com/ClickHouse/ClickHouse/issues/3492). Also fix check for local address in ClickHouseDictionarySource.
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[#9262](https://github.com/ClickHouse/ClickHouse/pull/9262) [(tabplubix)](https://github.com/tavplubix)
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* Fix segfault in `StorageMerge`, which can happen when reading from StorageFile.
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[#9387](https://github.com/ClickHouse/ClickHouse/pull/9387) [(tabplubix)](https://github.com/tavplubix)
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* Prevent losing data in `Kafka` in rare cases when exception happens after reading suffix but before commit. Fixes [#9378](https://github.com/ClickHouse/ClickHouse/issues/9378). Related: [#7175](https://github.com/ClickHouse/ClickHouse/issues/7175)
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* Prevent losing data in `Kafka` in rare cases when exception happens after reading suffix but before commit. Fixes [#9378](https://github.com/ClickHouse/ClickHouse/issues/9378). Related: [#7175](https://github.com/ClickHouse/ClickHouse/issues/7175)
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[#9507](https://github.com/ClickHouse/ClickHouse/pull/9507) [(filimonov)](https://github.com/filimonov)
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* Fix bug leading to server termination when trying to use / drop `Kafka` table created with wrong parameters. Fixes [#9494](https://github.com/ClickHouse/ClickHouse/issues/9494). Incorporates [#9507](https://github.com/ClickHouse/ClickHouse/issues/9507).
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* Fix bug leading to server termination when trying to use / drop `Kafka` table created with wrong parameters. Fixes [#9494](https://github.com/ClickHouse/ClickHouse/issues/9494). Incorporates [#9507](https://github.com/ClickHouse/ClickHouse/issues/9507).
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[#9513](https://github.com/ClickHouse/ClickHouse/pull/9513) [(filimonov)](https://github.com/filimonov)
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#### New Feature
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* Add `force_deduplicate_children` option to control the behaviour of idempotent inserts into tables with materialized views. This new feature was added to the bugfix release by a special request from Altinity.
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* Add `deduplicate_blocks_in_dependent_materialized_views` option to control the behaviour of idempotent inserts into tables with materialized views. This new feature was added to the bugfix release by a special request from Altinity.
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[#9070](https://github.com/ClickHouse/ClickHouse/pull/9070) [(urykhy)](https://github.com/urykhy)
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* Fix distributed subqueries incompatibility with older CH versions. Fixes [#7851](https://github.com/ClickHouse/ClickHouse/issues/7851)
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[(tabplubix)](https://github.com/tavplubix)
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* When executing `CREATE` query, fold constant expressions in storage engine arguments. Replace empty database name with current database. Fixes [#6508](https://github.com/ClickHouse/ClickHouse/issues/6508), [#3492](https://github.com/ClickHouse/ClickHouse/issues/3492). Also fix check for local address in `ClickHouseDictionarySource`.
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* When executing `CREATE` query, fold constant expressions in storage engine arguments. Replace empty database name with current database. Fixes [#6508](https://github.com/ClickHouse/ClickHouse/issues/6508), [#3492](https://github.com/ClickHouse/ClickHouse/issues/3492). Also fix check for local address in `ClickHouseDictionarySource`.
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[#9262](https://github.com/ClickHouse/ClickHouse/pull/9262) [(tabplubix)](https://github.com/tavplubix)
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* Now background merges in `*MergeTree` table engines family preserve storage policy volume order more accurately.
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* Now background merges in `*MergeTree` table engines family preserve storage policy volume order more accurately.
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[#8549](https://github.com/ClickHouse/ClickHouse/pull/8549) ([Vladimir Chebotarev](https://github.com/excitoon))
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* Prevent losing data in `Kafka` in rare cases when exception happens after reading suffix but before commit. Fixes [#9378](https://github.com/ClickHouse/ClickHouse/issues/9378). Related: [#7175](https://github.com/ClickHouse/ClickHouse/issues/7175)
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* Prevent losing data in `Kafka` in rare cases when exception happens after reading suffix but before commit. Fixes [#9378](https://github.com/ClickHouse/ClickHouse/issues/9378). Related: [#7175](https://github.com/ClickHouse/ClickHouse/issues/7175)
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[#9507](https://github.com/ClickHouse/ClickHouse/pull/9507) [(filimonov)](https://github.com/filimonov)
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* Fix bug leading to server termination when trying to use / drop `Kafka` table created with wrong parameters. Fixes [#9494](https://github.com/ClickHouse/ClickHouse/issues/9494). Incorporates [#9507](https://github.com/ClickHouse/ClickHouse/issues/9507).
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* Fix bug leading to server termination when trying to use / drop `Kafka` table created with wrong parameters. Fixes [#9494](https://github.com/ClickHouse/ClickHouse/issues/9494). Incorporates [#9507](https://github.com/ClickHouse/ClickHouse/issues/9507).
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[#9513](https://github.com/ClickHouse/ClickHouse/pull/9513) [(filimonov)](https://github.com/filimonov)
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* Allow using `MaterializedView` with subqueries above `Kafka` tables.
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* Allow using `MaterializedView` with subqueries above `Kafka` tables.
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[#8197](https://github.com/ClickHouse/ClickHouse/pull/8197) ([filimonov](https://github.com/filimonov))
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* Add `force_deduplicate_childrens` option to reduce dataloss chance on insert into table with `Materialized View`.
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* Add `force_deduplicate_childrens` option to reduce dataloss chance on insert into table with `Materialized View`.
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[#9070](https://github.com/ClickHouse/ClickHouse/pull/9070) [(urykhy)](https://github.com/urykhy)
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### ClickHouse release v19.16.2.2, 2019-10-30
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@ -552,7 +552,7 @@ log_query_threads=1
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## max_insert_threads {#settings-max_insert_threads}
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Максимальное количество потоков для выполнения запроса `INSERT SELECT`.
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Максимальное количество потоков для выполнения запроса `INSERT SELECT`.
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Возможные значения:
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@ -869,7 +869,7 @@ ClickHouse генерирует исключение
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По умолчанию блоки, вставляемые в реплицируемые таблицы оператором `INSERT`, дедуплицируются (см. [Репликация данных](../table_engines/replication.md).
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## force_deduplicate_childrens {#settings-force_deduplicate_childrens}
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## deduplicate_blocks_in_dependent_materialized_views {#settings-deduplicate_blocks_in_dependent_materialized_views}
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Включает и выключает проверку дедупликации для материализованных представлений, которые получают данные из Replicated* таблиц.
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@ -880,9 +880,9 @@ ClickHouse генерирует исключение
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Значение по умолчанию: 0.
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По умолчанию проверка дедупликации у материализованных представлений не производится, а наследуюется от Replicated* (основной) таблицы, за которой "следит" материализованное представление.
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По умолчанию проверка дедупликации у материализованных представлений не производится, а наследуюется от Replicated* (основной) таблицы, за которой "следит" материализованное представление.
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Т.е. если `INSERT` в основную таблицу д.б. пропущен (сдедуплирован), то автоматически не будет вставки и в материализованные представления. Это имплементировано для того, чтобы работали материализованные представления, которые сильно группируют данные основных `INSERT`, до такой степени что блоки вставляемые в материализованные представления получаются одинаковыми для разных `INSERT` в основную таблицу.
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Одновременно это "ломает" идемпотентность вставки в материализованные представления. Т.е. если `INSERT` был успешен в основную таблицу и неуспешен в таблицу материализованного представления (напр. из-за сетевого сбоя при коммуникации с Zookeeper), клиент получит ошибку и попытается повторить `INSERT`. Но вставки в материализованные представления произведено не будет, потому что дедупликация сработает на основной таблице. Настройка `force_deduplicate_childrens` позволяет это изменить. Т.е. при повторном `INSERT` будет произведена дедупликация на таблице материализованного представления, и повторный инсерт вставит данные в таблицу материализованного представления, которые не удалось вставить из-за сбоя первого `INSERT`.
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Одновременно это "ломает" идемпотентность вставки в материализованные представления. Т.е. если `INSERT` был успешен в основную таблицу и неуспешен в таблицу материализованного представления (напр. из-за сетевого сбоя при коммуникации с Zookeeper), клиент получит ошибку и попытается повторить `INSERT`. Но вставки в материализованные представления произведено не будет, потому что дедупликация сработает на основной таблице. Настройка `deduplicate_blocks_in_dependent_materialized_views` позволяет это изменить. Т.е. при повторном `INSERT` будет произведена дедупликация на таблице материализованного представления, и повторный инсерт вставит данные в таблицу материализованного представления, которые не удалось вставить из-за сбоя первого `INSERT`.
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## count_distinct_implementation {#settings-count_distinct_implementation}
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