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Merge branch 'master' of https://github.com/ClickHouse/ClickHouse into cast-internal
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CHANGELOG.md
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CHANGELOG.md
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### ClickHouse release v21.8, 2021-08-11
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#### New Features
|
||||
|
||||
* Collect common system metrics (in `system.asynchronous_metrics` and `system.asynchronous_metric_log`) on CPU usage, disk usage, memory usage, IO, network, files, load average, CPU frequencies, thermal sensors, EDAC counters, system uptime; also added metrics about the scheduling jitter and the time spent collecting the metrics. It works similar to `atop` in ClickHouse and allows access to monitoring data even if you have no additional tools installed. Close [#9430](https://github.com/ClickHouse/ClickHouse/issues/9430). [#24416](https://github.com/ClickHouse/ClickHouse/pull/24416) ([Yegor Levankov](https://github.com/elevankoff)).
|
||||
* Add new functions `leftPad()`, `rightPad()`, `leftPadUTF8()`, `rightPadUTF8()`. [#26075](https://github.com/ClickHouse/ClickHouse/pull/26075) ([Vitaly Baranov](https://github.com/vitlibar)).
|
||||
* Add the `FIRST` keyword to the `ADD INDEX` command to be able to add the index at the beginning of the indices list. [#25904](https://github.com/ClickHouse/ClickHouse/pull/25904) ([xjewer](https://github.com/xjewer)).
|
||||
* Introduce `system.data_skipping_indices` table containing information about existing data skipping indices. Close [#7659](https://github.com/ClickHouse/ClickHouse/issues/7659). [#25693](https://github.com/ClickHouse/ClickHouse/pull/25693) ([Dmitry Novik](https://github.com/novikd)).
|
||||
* Add `bin`/`unbin` functions. [#25609](https://github.com/ClickHouse/ClickHouse/pull/25609) ([zhaoyu](https://github.com/zxc111)).
|
||||
* Support `Map` and `(U)Int128`, `U(Int256) types in `mapAdd` and `mapSubtract` functions. [#25596](https://github.com/ClickHouse/ClickHouse/pull/25596) ([Ildus Kurbangaliev](https://github.com/ildus)).
|
||||
* Support `DISTINCT ON (columns)` expression, close [#25404](https://github.com/ClickHouse/ClickHouse/issues/25404). [#25589](https://github.com/ClickHouse/ClickHouse/pull/25589) ([Zijie Lu](https://github.com/TszKitLo40)).
|
||||
* Add support for a part of SQLJSON standard. [#24148](https://github.com/ClickHouse/ClickHouse/pull/24148) ([l1tsolaiki](https://github.com/l1tsolaiki)).
|
||||
* Add MaterializedPostgreSQL table engine and database engine. This database engine allows replicating a whole database or any subset of database tables. [#20470](https://github.com/ClickHouse/ClickHouse/pull/20470) ([Kseniia Sumarokova](https://github.com/kssenii)).
|
||||
* Add an ability to reset a custom setting to default and remove it from the table's metadata. It allows rolling back the change without knowing the system/config's default. Closes [#14449](https://github.com/ClickHouse/ClickHouse/issues/14449). [#17769](https://github.com/ClickHouse/ClickHouse/pull/17769) ([xjewer](https://github.com/xjewer)).
|
||||
* Render pipelines as graphs in Web UI if `EXPLAIN PIPELINE graph = 1` query is submitted. [#26067](https://github.com/ClickHouse/ClickHouse/pull/26067) ([alexey-milovidov](https://github.com/alexey-milovidov)).
|
||||
|
||||
#### Performance Improvements
|
||||
|
||||
* Compile aggregate functions. Use option `compile_aggregate_expressions` to enable it. [#24789](https://github.com/ClickHouse/ClickHouse/pull/24789) ([Maksim Kita](https://github.com/kitaisreal)).
|
||||
* Improve latency of short queries that require reading from tables with many columns. [#26371](https://github.com/ClickHouse/ClickHouse/pull/26371) ([Anton Popov](https://github.com/CurtizJ)).
|
||||
|
||||
#### Improvements
|
||||
|
||||
* Use `Map` data type for system logs tables (`system.query_log`, `system.query_thread_log`, `system.processes`, `system.opentelemetry_span_log`). These tables will be auto-created with new data types. Virtual columns are created to support old queries. Closes [#18698](https://github.com/ClickHouse/ClickHouse/issues/18698). [#23934](https://github.com/ClickHouse/ClickHouse/pull/23934), [#25773](https://github.com/ClickHouse/ClickHouse/pull/25773) ([hexiaoting](https://github.com/hexiaoting), [sundy-li](https://github.com/sundy-li)).
|
||||
* For a dictionary with a complex key containing only one attribute, allow not wrapping the key expression in tuple for functions `dictGet`, `dictHas`. [#26130](https://github.com/ClickHouse/ClickHouse/pull/26130) ([Maksim Kita](https://github.com/kitaisreal)).
|
||||
* Implement function `bin`/`hex` from `AggregateFunction` states. [#26094](https://github.com/ClickHouse/ClickHouse/pull/26094) ([zhaoyu](https://github.com/zxc111)).
|
||||
* Support arguments of `UUID` type for `empty` and `notEmpty` functions. `UUID` is empty if it is all zeros (nil UUID). Closes [#3446](https://github.com/ClickHouse/ClickHouse/issues/3446). [#25974](https://github.com/ClickHouse/ClickHouse/pull/25974) ([zhaoyu](https://github.com/zxc111)).
|
||||
* Fix error with query `SET SQL_SELECT_LIMIT` in MySQL protocol. Closes [#17115](https://github.com/ClickHouse/ClickHouse/issues/17115). [#25972](https://github.com/ClickHouse/ClickHouse/pull/25972) ([Kseniia Sumarokova](https://github.com/kssenii)).
|
||||
* More instrumentation for network interaction: add counters for recv/send bytes; add gauges for recvs/sends. Added missing documentation. Close [#5897](https://github.com/ClickHouse/ClickHouse/issues/5897). [#25962](https://github.com/ClickHouse/ClickHouse/pull/25962) ([alexey-milovidov](https://github.com/alexey-milovidov)).
|
||||
* Add setting `optimize_move_to_prewhere_if_final`. If query has `FINAL`, the optimization `move_to_prewhere` will be enabled only if both `optimize_move_to_prewhere` and `optimize_move_to_prewhere_if_final` are enabled. Closes [#8684](https://github.com/ClickHouse/ClickHouse/issues/8684). [#25940](https://github.com/ClickHouse/ClickHouse/pull/25940) ([Kseniia Sumarokova](https://github.com/kssenii)).
|
||||
* Allow complex quoted identifiers of JOINed tables. Close [#17861](https://github.com/ClickHouse/ClickHouse/issues/17861). [#25924](https://github.com/ClickHouse/ClickHouse/pull/25924) ([alexey-milovidov](https://github.com/alexey-milovidov)).
|
||||
* Add support for Unicode (e.g. Chinese, Cyrillic) components in `Nested` data types. Close [#25594](https://github.com/ClickHouse/ClickHouse/issues/25594). [#25923](https://github.com/ClickHouse/ClickHouse/pull/25923) ([alexey-milovidov](https://github.com/alexey-milovidov)).
|
||||
* Allow `quantiles*` functions to work with `aggregate_functions_null_for_empty`. Close [#25892](https://github.com/ClickHouse/ClickHouse/issues/25892). [#25919](https://github.com/ClickHouse/ClickHouse/pull/25919) ([alexey-milovidov](https://github.com/alexey-milovidov)).
|
||||
* Allow parameters for parametric aggregate functions to be arbitrary constant expressions (e.g., `1 + 2`), not just literals. It also allows using the query parameters (in parameterized queries like `{param:UInt8}`) inside parametric aggregate functions. Closes [#11607](https://github.com/ClickHouse/ClickHouse/issues/11607). [#25910](https://github.com/ClickHouse/ClickHouse/pull/25910) ([alexey-milovidov](https://github.com/alexey-milovidov)).
|
||||
* Correctly throw the exception on the attempt to parse an invalid `Date`. Closes [#6481](https://github.com/ClickHouse/ClickHouse/issues/6481). [#25909](https://github.com/ClickHouse/ClickHouse/pull/25909) ([alexey-milovidov](https://github.com/alexey-milovidov)).
|
||||
* Support for multiple includes in configuration. It is possible to include users configuration, remote server configuration from multiple sources. Simply place `<include />` element with `from_zk`, `from_env` or `incl` attribute, and it will be replaced with the substitution. [#24404](https://github.com/ClickHouse/ClickHouse/pull/24404) ([nvartolomei](https://github.com/nvartolomei)).
|
||||
* Support for queries with a column named `"null"` (it must be specified in back-ticks or double quotes) and `ON CLUSTER`. Closes [#24035](https://github.com/ClickHouse/ClickHouse/issues/24035). [#25907](https://github.com/ClickHouse/ClickHouse/pull/25907) ([alexey-milovidov](https://github.com/alexey-milovidov)).
|
||||
* Support `LowCardinality`, `Decimal`, and `UUID` for `JSONExtract`. Closes [#24606](https://github.com/ClickHouse/ClickHouse/issues/24606). [#25900](https://github.com/ClickHouse/ClickHouse/pull/25900) ([Kseniia Sumarokova](https://github.com/kssenii)).
|
||||
* Convert history file from `readline` format to `replxx` format. [#25888](https://github.com/ClickHouse/ClickHouse/pull/25888) ([Azat Khuzhin](https://github.com/azat)).
|
||||
* Fix bug which can lead to intersecting parts after `DROP PART` or background deletion of an empty part. [#25884](https://github.com/ClickHouse/ClickHouse/pull/25884) ([alesapin](https://github.com/alesapin)).
|
||||
* Better handling of lost parts for `ReplicatedMergeTree` tables. Fixes rare inconsistencies in `ReplicationQueue`. Fixes [#10368](https://github.com/ClickHouse/ClickHouse/issues/10368). [#25820](https://github.com/ClickHouse/ClickHouse/pull/25820) ([alesapin](https://github.com/alesapin)).
|
||||
* Allow starting clickhouse-client with unreadable working directory. [#25817](https://github.com/ClickHouse/ClickHouse/pull/25817) ([ianton-ru](https://github.com/ianton-ru)).
|
||||
* Fix "No available columns" error for `Merge` storage. [#25801](https://github.com/ClickHouse/ClickHouse/pull/25801) ([Azat Khuzhin](https://github.com/azat)).
|
||||
* MySQL Engine now supports the exchange of column comments between MySQL and ClickHouse. [#25795](https://github.com/ClickHouse/ClickHouse/pull/25795) ([Storozhuk Kostiantyn](https://github.com/sand6255)).
|
||||
* Fix inconsistent behaviour of `GROUP BY` constant on empty set. Closes [#6842](https://github.com/ClickHouse/ClickHouse/issues/6842). [#25786](https://github.com/ClickHouse/ClickHouse/pull/25786) ([Kseniia Sumarokova](https://github.com/kssenii)).
|
||||
* Cancel already running merges in partition on `DROP PARTITION` and `TRUNCATE` for `ReplicatedMergeTree`. Resolves [#17151](https://github.com/ClickHouse/ClickHouse/issues/17151). [#25684](https://github.com/ClickHouse/ClickHouse/pull/25684) ([tavplubix](https://github.com/tavplubix)).
|
||||
* Support ENUM` data type for MaterializeMySQL. [#25676](https://github.com/ClickHouse/ClickHouse/pull/25676) ([Storozhuk Kostiantyn](https://github.com/sand6255)).
|
||||
* Support materialized and aliased columns in JOIN, close [#13274](https://github.com/ClickHouse/ClickHouse/issues/13274). [#25634](https://github.com/ClickHouse/ClickHouse/pull/25634) ([Vladimir C](https://github.com/vdimir)).
|
||||
* Fix possible logical race condition between `ALTER TABLE ... DETACH` and background merges. [#25605](https://github.com/ClickHouse/ClickHouse/pull/25605) ([Azat Khuzhin](https://github.com/azat)).
|
||||
* Make `NetworkReceiveElapsedMicroseconds` metric to correctly include the time spent waiting for data from the client to `INSERT`. Close [#9958](https://github.com/ClickHouse/ClickHouse/issues/9958). [#25602](https://github.com/ClickHouse/ClickHouse/pull/25602) ([alexey-milovidov](https://github.com/alexey-milovidov)).
|
||||
* Support `TRUNCATE TABLE` for StorageS3 and StorageHDFS. Close [#25530](https://github.com/ClickHouse/ClickHouse/issues/25530). [#25550](https://github.com/ClickHouse/ClickHouse/pull/25550) ([Kseniia Sumarokova](https://github.com/kssenii)).
|
||||
* Support for dynamic reloading of config to change number of threads in pool for background jobs execution (merges, mutations, fetches). [#25548](https://github.com/ClickHouse/ClickHouse/pull/25548) ([Nikita Mikhaylov](https://github.com/nikitamikhaylov)).
|
||||
* Allow extracting of non-string element as string using `JSONExtract`. This is for [#25414](https://github.com/ClickHouse/ClickHouse/issues/25414). [#25452](https://github.com/ClickHouse/ClickHouse/pull/25452) ([Amos Bird](https://github.com/amosbird)).
|
||||
* Support regular expression in `Database` argument for `StorageMerge`. Close [#776](https://github.com/ClickHouse/ClickHouse/issues/776). [#25064](https://github.com/ClickHouse/ClickHouse/pull/25064) ([flynn](https://github.com/ucasfl)).
|
||||
* Web UI: if the value looks like a URL, automatically generate a link. [#25965](https://github.com/ClickHouse/ClickHouse/pull/25965) ([alexey-milovidov](https://github.com/alexey-milovidov)).
|
||||
* Make `sudo service clickhouse-server start` to work on systems with `systemd` like Centos 8. Close [#14298](https://github.com/ClickHouse/ClickHouse/issues/14298). Close [#17799](https://github.com/ClickHouse/ClickHouse/issues/17799). [#25921](https://github.com/ClickHouse/ClickHouse/pull/25921) ([alexey-milovidov](https://github.com/alexey-milovidov)).
|
||||
|
||||
#### Bug Fixes
|
||||
|
||||
* Fix incorrect `SET ROLE` in some cases. [#26707](https://github.com/ClickHouse/ClickHouse/pull/26707) ([Vitaly Baranov](https://github.com/vitlibar)).
|
||||
* Fix potential `nullptr` dereference in window functions. Fix [#25276](https://github.com/ClickHouse/ClickHouse/issues/25276). [#26668](https://github.com/ClickHouse/ClickHouse/pull/26668) ([Alexander Kuzmenkov](https://github.com/akuzm)).
|
||||
* Fix incorrect function names of `groupBitmapAnd/Or/Xor`. Fix [#26557](https://github.com/ClickHouse/ClickHouse/pull/26557) ([Amos Bird](https://github.com/amosbird)).
|
||||
* Fix crash in rabbitmq shutdown in case rabbitmq setup was not started. Closes [#26504](https://github.com/ClickHouse/ClickHouse/issues/26504). [#26529](https://github.com/ClickHouse/ClickHouse/pull/26529) ([Kseniia Sumarokova](https://github.com/kssenii)).
|
||||
* Fix issues with `CREATE DICTIONARY` query if dictionary name or database name was quoted. Closes [#26491](https://github.com/ClickHouse/ClickHouse/issues/26491). [#26508](https://github.com/ClickHouse/ClickHouse/pull/26508) ([Maksim Kita](https://github.com/kitaisreal)).
|
||||
* Fix broken name resolution after rewriting column aliases. Fix [#26432](https://github.com/ClickHouse/ClickHouse/issues/26432). [#26475](https://github.com/ClickHouse/ClickHouse/pull/26475) ([Amos Bird](https://github.com/amosbird)).
|
||||
* Fix infinite non-joined block stream in `partial_merge_join` close [#26325](https://github.com/ClickHouse/ClickHouse/issues/26325). [#26374](https://github.com/ClickHouse/ClickHouse/pull/26374) ([Vladimir C](https://github.com/vdimir)).
|
||||
* Fix possible crash when login as dropped user. Fix [#26073](https://github.com/ClickHouse/ClickHouse/issues/26073). [#26363](https://github.com/ClickHouse/ClickHouse/pull/26363) ([Vitaly Baranov](https://github.com/vitlibar)).
|
||||
* Fix `optimize_distributed_group_by_sharding_key` for multiple columns (leads to incorrect result w/ `optimize_skip_unused_shards=1`/`allow_nondeterministic_optimize_skip_unused_shards=1` and multiple columns in sharding key expression). [#26353](https://github.com/ClickHouse/ClickHouse/pull/26353) ([Azat Khuzhin](https://github.com/azat)).
|
||||
* `CAST` from `Date` to `DateTime` (or `DateTime64`) was not using the timezone of the `DateTime` type. It can also affect the comparison between `Date` and `DateTime`. Inference of the common type for `Date` and `DateTime` also was not using the corresponding timezone. It affected the results of function `if` and array construction. Closes [#24128](https://github.com/ClickHouse/ClickHouse/issues/24128). [#24129](https://github.com/ClickHouse/ClickHouse/pull/24129) ([Maksim Kita](https://github.com/kitaisreal)).
|
||||
* Fixed rare bug in lost replica recovery that may cause replicas to diverge. [#26321](https://github.com/ClickHouse/ClickHouse/pull/26321) ([tavplubix](https://github.com/tavplubix)).
|
||||
* Fix zstd decompression in case there are escape sequences at the end of internal buffer. Closes [#26013](https://github.com/ClickHouse/ClickHouse/issues/26013). [#26314](https://github.com/ClickHouse/ClickHouse/pull/26314) ([Kseniia Sumarokova](https://github.com/kssenii)).
|
||||
* Fix logical error on join with totals, close [#26017](https://github.com/ClickHouse/ClickHouse/issues/26017). [#26250](https://github.com/ClickHouse/ClickHouse/pull/26250) ([Vladimir C](https://github.com/vdimir)).
|
||||
* Remove excessive newline in `thread_name` column in `system.stack_trace` table. Fix [#24124](https://github.com/ClickHouse/ClickHouse/issues/24124). [#26210](https://github.com/ClickHouse/ClickHouse/pull/26210) ([alexey-milovidov](https://github.com/alexey-milovidov)).
|
||||
* Fix `joinGet` with `LowCarinality` columns, close [#25993](https://github.com/ClickHouse/ClickHouse/issues/25993). [#26118](https://github.com/ClickHouse/ClickHouse/pull/26118) ([Vladimir C](https://github.com/vdimir)).
|
||||
* Fix possible crash in `pointInPolygon` if the setting `validate_polygons` is turned off. [#26113](https://github.com/ClickHouse/ClickHouse/pull/26113) ([alexey-milovidov](https://github.com/alexey-milovidov)).
|
||||
* Fix throwing exception when iterate over non-existing remote directory. [#26087](https://github.com/ClickHouse/ClickHouse/pull/26087) ([ianton-ru](https://github.com/ianton-ru)).
|
||||
* Fix rare server crash because of `abort` in ZooKeeper client. Fixes [#25813](https://github.com/ClickHouse/ClickHouse/issues/25813). [#26079](https://github.com/ClickHouse/ClickHouse/pull/26079) ([alesapin](https://github.com/alesapin)).
|
||||
* Fix wrong thread estimation for right subquery join in some cases. Close [#24075](https://github.com/ClickHouse/ClickHouse/issues/24075). [#26052](https://github.com/ClickHouse/ClickHouse/pull/26052) ([Vladimir C](https://github.com/vdimir)).
|
||||
* Fixed incorrect `sequence_id` in MySQL protocol packets that ClickHouse sends on exception during query execution. It might cause MySQL client to reset connection to ClickHouse server. Fixes [#21184](https://github.com/ClickHouse/ClickHouse/issues/21184). [#26051](https://github.com/ClickHouse/ClickHouse/pull/26051) ([tavplubix](https://github.com/tavplubix)).
|
||||
* Fix possible mismatched header when using normal projection with `PREWHERE`. Fix [#26020](https://github.com/ClickHouse/ClickHouse/issues/26020). [#26038](https://github.com/ClickHouse/ClickHouse/pull/26038) ([Amos Bird](https://github.com/amosbird)).
|
||||
* Fix formatting of type `Map` with integer keys to `JSON`. [#25982](https://github.com/ClickHouse/ClickHouse/pull/25982) ([Anton Popov](https://github.com/CurtizJ)).
|
||||
* Fix possible deadlock during query profiler stack unwinding. Fix [#25968](https://github.com/ClickHouse/ClickHouse/issues/25968). [#25970](https://github.com/ClickHouse/ClickHouse/pull/25970) ([Maksim Kita](https://github.com/kitaisreal)).
|
||||
* Fix crash on call `dictGet()` with bad arguments. [#25913](https://github.com/ClickHouse/ClickHouse/pull/25913) ([Vitaly Baranov](https://github.com/vitlibar)).
|
||||
* Fixed `scram-sha-256` authentication for PostgreSQL engines. Closes [#24516](https://github.com/ClickHouse/ClickHouse/issues/24516). [#25906](https://github.com/ClickHouse/ClickHouse/pull/25906) ([Kseniia Sumarokova](https://github.com/kssenii)).
|
||||
* Fix extremely long backoff for background tasks when the background pool is full. Fixes [#25836](https://github.com/ClickHouse/ClickHouse/issues/25836). [#25893](https://github.com/ClickHouse/ClickHouse/pull/25893) ([alesapin](https://github.com/alesapin)).
|
||||
* Fix ARM exception handling with non default page size. Fixes [#25512](https://github.com/ClickHouse/ClickHouse/issues/25512), [#25044](https://github.com/ClickHouse/ClickHouse/issues/25044), [#24901](https://github.com/ClickHouse/ClickHouse/issues/24901), [#23183](https://github.com/ClickHouse/ClickHouse/issues/23183), [#20221](https://github.com/ClickHouse/ClickHouse/issues/20221), [#19703](https://github.com/ClickHouse/ClickHouse/issues/19703), [#19028](https://github.com/ClickHouse/ClickHouse/issues/19028), [#18391](https://github.com/ClickHouse/ClickHouse/issues/18391), [#18121](https://github.com/ClickHouse/ClickHouse/issues/18121), [#17994](https://github.com/ClickHouse/ClickHouse/issues/17994), [#12483](https://github.com/ClickHouse/ClickHouse/issues/12483). [#25854](https://github.com/ClickHouse/ClickHouse/pull/25854) ([Maksim Kita](https://github.com/kitaisreal)).
|
||||
* Fix sharding_key from column w/o function for `remote()` (before `select * from remote('127.1', system.one, dummy)` leads to `Unknown column: dummy, there are only columns .` error). [#25824](https://github.com/ClickHouse/ClickHouse/pull/25824) ([Azat Khuzhin](https://github.com/azat)).
|
||||
* Fixed `Not found column ...` and `Missing column ...` errors when selecting from `MaterializeMySQL`. Fixes [#23708](https://github.com/ClickHouse/ClickHouse/issues/23708), [#24830](https://github.com/ClickHouse/ClickHouse/issues/24830), [#25794](https://github.com/ClickHouse/ClickHouse/issues/25794). [#25822](https://github.com/ClickHouse/ClickHouse/pull/25822) ([tavplubix](https://github.com/tavplubix)).
|
||||
* Fix `optimize_skip_unused_shards_rewrite_in` for non-UInt64 types (may select incorrect shards eventually or throw `Cannot infer type of an empty tuple` or `Function tuple requires at least one argument`). [#25798](https://github.com/ClickHouse/ClickHouse/pull/25798) ([Azat Khuzhin](https://github.com/azat)).
|
||||
* Fix rare bug with `DROP PART` query for `ReplicatedMergeTree` tables which can lead to error message `Unexpected merged part intersecting drop range`. [#25783](https://github.com/ClickHouse/ClickHouse/pull/25783) ([alesapin](https://github.com/alesapin)).
|
||||
* Fix bug in `TTL` with `GROUP BY` expression which refuses to execute `TTL` after first execution in part. [#25743](https://github.com/ClickHouse/ClickHouse/pull/25743) ([alesapin](https://github.com/alesapin)).
|
||||
* Allow StorageMerge to access tables with aliases. Closes [#6051](https://github.com/ClickHouse/ClickHouse/issues/6051). [#25694](https://github.com/ClickHouse/ClickHouse/pull/25694) ([Kseniia Sumarokova](https://github.com/kssenii)).
|
||||
* Fix slow dict join in some cases, close [#24209](https://github.com/ClickHouse/ClickHouse/issues/24209). [#25618](https://github.com/ClickHouse/ClickHouse/pull/25618) ([Vladimir C](https://github.com/vdimir)).
|
||||
* Fix `ALTER MODIFY COLUMN` of columns, which participates in TTL expressions. [#25554](https://github.com/ClickHouse/ClickHouse/pull/25554) ([Anton Popov](https://github.com/CurtizJ)).
|
||||
* Fix assertion in `PREWHERE` with non-UInt8 type, close [#19589](https://github.com/ClickHouse/ClickHouse/issues/19589). [#25484](https://github.com/ClickHouse/ClickHouse/pull/25484) ([Vladimir C](https://github.com/vdimir)).
|
||||
* Fix some fuzzed msan crash. Fixes [#22517](https://github.com/ClickHouse/ClickHouse/issues/22517). [#26428](https://github.com/ClickHouse/ClickHouse/pull/26428) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
|
||||
* Fix empty history file conversion. [#26589](https://github.com/ClickHouse/ClickHouse/pull/26589) ([Azat Khuzhin](https://github.com/azat)).
|
||||
* Update `chown` cmd check in `clickhouse-server` docker entrypoint. It fixes error 'cluster pod restart failed (or timeout)' on kubernetes. [#26545](https://github.com/ClickHouse/ClickHouse/pull/26545) ([Ky Li](https://github.com/Kylinrix)).
|
||||
|
||||
#### Build/Testing/Packaging Improvements
|
||||
|
||||
* Disabling TestFlows LDAP module due to test fails. [#26065](https://github.com/ClickHouse/ClickHouse/pull/26065) ([vzakaznikov](https://github.com/vzakaznikov)).
|
||||
* Enabling all TestFlows modules and fixing some tests. [#26011](https://github.com/ClickHouse/ClickHouse/pull/26011) ([vzakaznikov](https://github.com/vzakaznikov)).
|
||||
* Add new tests for checking access rights for columns used in filters (`WHERE` / `PREWHERE` / row policy) of the `SELECT` statement after changes in [#24405](https://github.com/ClickHouse/ClickHouse/pull/24405). [#25619](https://github.com/ClickHouse/ClickHouse/pull/25619) ([Vitaly Baranov](https://github.com/vitlibar)).
|
||||
|
||||
#### Other
|
||||
|
||||
* Add `clickhouse-keeper-converter` tool which allows converting zookeeper logs and snapshots into `clickhouse-keeper` snapshot format. [#25428](https://github.com/ClickHouse/ClickHouse/pull/25428) ([alesapin](https://github.com/alesapin)).
|
||||
|
||||
|
||||
|
||||
### ClickHouse release v21.7, 2021-07-09
|
||||
|
||||
#### Backward Incompatible Change
|
||||
|
||||
@ -271,12 +271,6 @@ endif()
|
||||
|
||||
include(cmake/cpu_features.cmake)
|
||||
|
||||
option(ARCH_NATIVE "Add -march=native compiler flag. This makes your binaries non-portable but more performant code may be generated.")
|
||||
|
||||
if (ARCH_NATIVE)
|
||||
set (COMPILER_FLAGS "${COMPILER_FLAGS} -march=native")
|
||||
endif ()
|
||||
|
||||
# Asynchronous unwind tables are needed for Query Profiler.
|
||||
# They are already by default on some platforms but possibly not on all platforms.
|
||||
# Enable it explicitly.
|
||||
|
||||
@ -5,109 +5,128 @@ include (CMakePushCheckState)
|
||||
|
||||
cmake_push_check_state ()
|
||||
|
||||
# gcc -dM -E -mno-sse2 - < /dev/null | sort > gcc-dump-nosse2
|
||||
# gcc -dM -E -msse2 - < /dev/null | sort > gcc-dump-sse2
|
||||
#define __SSE2__ 1
|
||||
#define __SSE2_MATH__ 1
|
||||
# The variables HAVE_* determine if compiler has support for the flag to use the corresponding instruction set.
|
||||
# The options ENABLE_* determine if we will tell compiler to actually use the corresponding instruction set if compiler can do it.
|
||||
|
||||
# gcc -dM -E -msse4.1 - < /dev/null | sort > gcc-dump-sse41
|
||||
#define __SSE4_1__ 1
|
||||
# All of them are unrelated to the instruction set at the host machine
|
||||
# (you can compile for newer instruction set on old machines and vice versa).
|
||||
|
||||
set (TEST_FLAG "-msse4.1")
|
||||
set (CMAKE_REQUIRED_FLAGS "${TEST_FLAG} -O0")
|
||||
check_cxx_source_compiles("
|
||||
#include <smmintrin.h>
|
||||
int main() {
|
||||
auto a = _mm_insert_epi8(__m128i(), 0, 0);
|
||||
(void)a;
|
||||
return 0;
|
||||
}
|
||||
" HAVE_SSE41)
|
||||
if (HAVE_SSE41)
|
||||
set (COMPILER_FLAGS "${COMPILER_FLAGS} ${TEST_FLAG}")
|
||||
endif ()
|
||||
option (ENABLE_SSSE3 "Use SSSE3 instructions on x86_64" 1)
|
||||
option (ENABLE_SSE41 "Use SSE4.1 instructions on x86_64" 1)
|
||||
option (ENABLE_SSE42 "Use SSE4.2 instructions on x86_64" 1)
|
||||
option (ENABLE_PCLMULQDQ "Use pclmulqdq instructions on x86_64" 1)
|
||||
option (ENABLE_POPCNT "Use popcnt instructions on x86_64" 1)
|
||||
option (ENABLE_AVX "Use AVX instructions on x86_64" 0)
|
||||
option (ENABLE_AVX2 "Use AVX2 instructions on x86_64" 0)
|
||||
|
||||
if (ARCH_PPC64LE)
|
||||
set (COMPILER_FLAGS "${COMPILER_FLAGS} -maltivec -D__SSE2__=1 -DNO_WARN_X86_INTRINSICS")
|
||||
endif ()
|
||||
option (ARCH_NATIVE "Add -march=native compiler flag. This makes your binaries non-portable but more performant code may be generated. This option overrides ENABLE_* options for specific instruction set. Highly not recommended to use." 0)
|
||||
|
||||
# gcc -dM -E -msse4.2 - < /dev/null | sort > gcc-dump-sse42
|
||||
#define __SSE4_2__ 1
|
||||
if (ARCH_NATIVE)
|
||||
set (COMPILER_FLAGS "${COMPILER_FLAGS} -march=native")
|
||||
|
||||
set (TEST_FLAG "-msse4.2")
|
||||
set (CMAKE_REQUIRED_FLAGS "${TEST_FLAG} -O0")
|
||||
check_cxx_source_compiles("
|
||||
#include <nmmintrin.h>
|
||||
int main() {
|
||||
auto a = _mm_crc32_u64(0, 0);
|
||||
(void)a;
|
||||
return 0;
|
||||
}
|
||||
" HAVE_SSE42)
|
||||
if (HAVE_SSE42)
|
||||
set (COMPILER_FLAGS "${COMPILER_FLAGS} ${TEST_FLAG}")
|
||||
endif ()
|
||||
else ()
|
||||
set (TEST_FLAG "-mssse3")
|
||||
set (CMAKE_REQUIRED_FLAGS "${TEST_FLAG} -O0")
|
||||
check_cxx_source_compiles("
|
||||
#include <tmmintrin.h>
|
||||
int main() {
|
||||
__m64 a = _mm_abs_pi8(__m64());
|
||||
(void)a;
|
||||
return 0;
|
||||
}
|
||||
" HAVE_SSSE3)
|
||||
if (HAVE_SSSE3 AND ENABLE_SSSE3)
|
||||
set (COMPILER_FLAGS "${COMPILER_FLAGS} ${TEST_FLAG}")
|
||||
endif ()
|
||||
|
||||
set (TEST_FLAG "-mssse3")
|
||||
set (CMAKE_REQUIRED_FLAGS "${TEST_FLAG} -O0")
|
||||
check_cxx_source_compiles("
|
||||
#include <tmmintrin.h>
|
||||
int main() {
|
||||
__m64 a = _mm_abs_pi8(__m64());
|
||||
(void)a;
|
||||
return 0;
|
||||
}
|
||||
" HAVE_SSSE3)
|
||||
|
||||
set (TEST_FLAG "-mavx")
|
||||
set (CMAKE_REQUIRED_FLAGS "${TEST_FLAG} -O0")
|
||||
check_cxx_source_compiles("
|
||||
#include <immintrin.h>
|
||||
int main() {
|
||||
auto a = _mm256_insert_epi8(__m256i(), 0, 0);
|
||||
(void)a;
|
||||
return 0;
|
||||
}
|
||||
" HAVE_AVX)
|
||||
set (TEST_FLAG "-msse4.1")
|
||||
set (CMAKE_REQUIRED_FLAGS "${TEST_FLAG} -O0")
|
||||
check_cxx_source_compiles("
|
||||
#include <smmintrin.h>
|
||||
int main() {
|
||||
auto a = _mm_insert_epi8(__m128i(), 0, 0);
|
||||
(void)a;
|
||||
return 0;
|
||||
}
|
||||
" HAVE_SSE41)
|
||||
if (HAVE_SSE41 AND ENABLE_SSE41)
|
||||
set (COMPILER_FLAGS "${COMPILER_FLAGS} ${TEST_FLAG}")
|
||||
endif ()
|
||||
|
||||
set (TEST_FLAG "-mavx2")
|
||||
set (CMAKE_REQUIRED_FLAGS "${TEST_FLAG} -O0")
|
||||
check_cxx_source_compiles("
|
||||
#include <immintrin.h>
|
||||
int main() {
|
||||
auto a = _mm256_add_epi16(__m256i(), __m256i());
|
||||
(void)a;
|
||||
return 0;
|
||||
}
|
||||
" HAVE_AVX2)
|
||||
if (ARCH_PPC64LE)
|
||||
set (COMPILER_FLAGS "${COMPILER_FLAGS} -maltivec -D__SSE2__=1 -DNO_WARN_X86_INTRINSICS")
|
||||
endif ()
|
||||
|
||||
set (TEST_FLAG "-mpclmul")
|
||||
set (CMAKE_REQUIRED_FLAGS "${TEST_FLAG} -O0")
|
||||
check_cxx_source_compiles("
|
||||
#include <wmmintrin.h>
|
||||
int main() {
|
||||
auto a = _mm_clmulepi64_si128(__m128i(), __m128i(), 0);
|
||||
(void)a;
|
||||
return 0;
|
||||
}
|
||||
" HAVE_PCLMULQDQ)
|
||||
set (TEST_FLAG "-msse4.2")
|
||||
set (CMAKE_REQUIRED_FLAGS "${TEST_FLAG} -O0")
|
||||
check_cxx_source_compiles("
|
||||
#include <nmmintrin.h>
|
||||
int main() {
|
||||
auto a = _mm_crc32_u64(0, 0);
|
||||
(void)a;
|
||||
return 0;
|
||||
}
|
||||
" HAVE_SSE42)
|
||||
if (HAVE_SSE42 AND ENABLE_SSE42)
|
||||
set (COMPILER_FLAGS "${COMPILER_FLAGS} ${TEST_FLAG}")
|
||||
endif ()
|
||||
|
||||
# gcc -dM -E -mpopcnt - < /dev/null | sort > gcc-dump-popcnt
|
||||
#define __POPCNT__ 1
|
||||
set (TEST_FLAG "-mpclmul")
|
||||
set (CMAKE_REQUIRED_FLAGS "${TEST_FLAG} -O0")
|
||||
check_cxx_source_compiles("
|
||||
#include <wmmintrin.h>
|
||||
int main() {
|
||||
auto a = _mm_clmulepi64_si128(__m128i(), __m128i(), 0);
|
||||
(void)a;
|
||||
return 0;
|
||||
}
|
||||
" HAVE_PCLMULQDQ)
|
||||
if (HAVE_PCLMULQDQ AND ENABLE_PCLMULQDQ)
|
||||
set (COMPILER_FLAGS "${COMPILER_FLAGS} ${TEST_FLAG}")
|
||||
endif ()
|
||||
|
||||
set (TEST_FLAG "-mpopcnt")
|
||||
set (TEST_FLAG "-mpopcnt")
|
||||
|
||||
set (CMAKE_REQUIRED_FLAGS "${TEST_FLAG} -O0")
|
||||
check_cxx_source_compiles("
|
||||
int main() {
|
||||
auto a = __builtin_popcountll(0);
|
||||
(void)a;
|
||||
return 0;
|
||||
}
|
||||
" HAVE_POPCNT)
|
||||
set (CMAKE_REQUIRED_FLAGS "${TEST_FLAG} -O0")
|
||||
check_cxx_source_compiles("
|
||||
int main() {
|
||||
auto a = __builtin_popcountll(0);
|
||||
(void)a;
|
||||
return 0;
|
||||
}
|
||||
" HAVE_POPCNT)
|
||||
if (HAVE_POPCNT AND ENABLE_POPCNT)
|
||||
set (COMPILER_FLAGS "${COMPILER_FLAGS} ${TEST_FLAG}")
|
||||
endif ()
|
||||
|
||||
if (HAVE_POPCNT AND NOT ARCH_AARCH64)
|
||||
set (COMPILER_FLAGS "${COMPILER_FLAGS} ${TEST_FLAG}")
|
||||
set (TEST_FLAG "-mavx")
|
||||
set (CMAKE_REQUIRED_FLAGS "${TEST_FLAG} -O0")
|
||||
check_cxx_source_compiles("
|
||||
#include <immintrin.h>
|
||||
int main() {
|
||||
auto a = _mm256_insert_epi8(__m256i(), 0, 0);
|
||||
(void)a;
|
||||
return 0;
|
||||
}
|
||||
" HAVE_AVX)
|
||||
if (HAVE_AVX AND ENABLE_AVX)
|
||||
set (COMPILER_FLAGS "${COMPILER_FLAGS} ${TEST_FLAG}")
|
||||
endif ()
|
||||
|
||||
set (TEST_FLAG "-mavx2")
|
||||
set (CMAKE_REQUIRED_FLAGS "${TEST_FLAG} -O0")
|
||||
check_cxx_source_compiles("
|
||||
#include <immintrin.h>
|
||||
int main() {
|
||||
auto a = _mm256_add_epi16(__m256i(), __m256i());
|
||||
(void)a;
|
||||
return 0;
|
||||
}
|
||||
" HAVE_AVX2)
|
||||
if (HAVE_AVX2 AND ENABLE_AVX2)
|
||||
set (COMPILER_FLAGS "${COMPILER_FLAGS} ${TEST_FLAG}")
|
||||
endif ()
|
||||
endif ()
|
||||
|
||||
cmake_pop_check_state ()
|
||||
|
||||
@ -4,3 +4,6 @@ set(SIMDJSON_SRC "${SIMDJSON_SRC_DIR}/simdjson.cpp")
|
||||
|
||||
add_library(simdjson ${SIMDJSON_SRC})
|
||||
target_include_directories(simdjson SYSTEM PUBLIC "${SIMDJSON_INCLUDE_DIR}" PRIVATE "${SIMDJSON_SRC_DIR}")
|
||||
|
||||
# simdjson is using its own CPU dispatching and get confused if we enable AVX/AVX2 flags.
|
||||
target_compile_options(simdjson PRIVATE -mno-avx -mno-avx2)
|
||||
|
||||
@ -1,3 +1,6 @@
|
||||
#include <string>
|
||||
#include "Common/MemoryTracker.h"
|
||||
#include "Columns/ColumnsNumber.h"
|
||||
#include "ConnectionParameters.h"
|
||||
#include "QueryFuzzer.h"
|
||||
#include "Suggest.h"
|
||||
@ -100,6 +103,14 @@
|
||||
#pragma GCC optimize("-fno-var-tracking-assignments")
|
||||
#endif
|
||||
|
||||
namespace CurrentMetrics
|
||||
{
|
||||
extern const Metric Revision;
|
||||
extern const Metric VersionInteger;
|
||||
extern const Metric MemoryTracking;
|
||||
extern const Metric MaxDDLEntryID;
|
||||
}
|
||||
|
||||
namespace fs = std::filesystem;
|
||||
|
||||
namespace DB
|
||||
@ -524,6 +535,18 @@ private:
|
||||
{
|
||||
UseSSL use_ssl;
|
||||
|
||||
MainThreadStatus::getInstance();
|
||||
|
||||
/// Limit on total memory usage
|
||||
size_t max_client_memory_usage = config().getInt64("max_memory_usage_in_client", 0 /*default value*/);
|
||||
|
||||
if (max_client_memory_usage != 0)
|
||||
{
|
||||
total_memory_tracker.setHardLimit(max_client_memory_usage);
|
||||
total_memory_tracker.setDescription("(total)");
|
||||
total_memory_tracker.setMetric(CurrentMetrics::MemoryTracking);
|
||||
}
|
||||
|
||||
registerFormats();
|
||||
registerFunctions();
|
||||
registerAggregateFunctions();
|
||||
@ -2581,6 +2604,7 @@ public:
|
||||
("opentelemetry-tracestate", po::value<std::string>(), "OpenTelemetry tracestate header as described by W3C Trace Context recommendation")
|
||||
("history_file", po::value<std::string>(), "path to history file")
|
||||
("no-warnings", "disable warnings when client connects to server")
|
||||
("max_memory_usage_in_client", po::value<int>(), "sets memory limit in client")
|
||||
;
|
||||
|
||||
Settings cmd_settings;
|
||||
|
||||
@ -455,7 +455,7 @@ UUID IAccessStorage::login(
|
||||
if (!replace_exception_with_cannot_authenticate)
|
||||
throw;
|
||||
|
||||
tryLogCurrentException(getLogger(), credentials.getUserName() + ": Authentication failed");
|
||||
tryLogCurrentException(getLogger(), "from: " + address.toString() + ", user: " + credentials.getUserName() + ": Authentication failed");
|
||||
throwCannotAuthenticate(credentials.getUserName());
|
||||
}
|
||||
}
|
||||
|
||||
@ -187,6 +187,7 @@ public:
|
||||
* So LC(Nullable(T)) would return true, LC(U) -- false.
|
||||
*/
|
||||
bool nestedIsNullable() const { return isColumnNullable(*dictionary.getColumnUnique().getNestedColumn()); }
|
||||
bool nestedCanBeInsideNullable() const { return dictionary.getColumnUnique().getNestedColumn()->canBeInsideNullable(); }
|
||||
void nestedToNullable() { dictionary.getColumnUnique().nestedToNullable(); }
|
||||
void nestedRemoveNullable() { dictionary.getColumnUnique().nestedRemoveNullable(); }
|
||||
|
||||
|
||||
@ -44,6 +44,13 @@ void Block::initializeIndexByName()
|
||||
}
|
||||
|
||||
|
||||
void Block::reserve(size_t count)
|
||||
{
|
||||
index_by_name.reserve(count);
|
||||
data.reserve(count);
|
||||
}
|
||||
|
||||
|
||||
void Block::insert(size_t position, ColumnWithTypeAndName elem)
|
||||
{
|
||||
if (position > data.size())
|
||||
@ -287,6 +294,7 @@ std::string Block::dumpIndex() const
|
||||
Block Block::cloneEmpty() const
|
||||
{
|
||||
Block res;
|
||||
res.reserve(data.size());
|
||||
|
||||
for (const auto & elem : data)
|
||||
res.insert(elem.cloneEmpty());
|
||||
@ -364,6 +372,8 @@ Block Block::cloneWithColumns(MutableColumns && columns) const
|
||||
Block res;
|
||||
|
||||
size_t num_columns = data.size();
|
||||
res.reserve(num_columns);
|
||||
|
||||
for (size_t i = 0; i < num_columns; ++i)
|
||||
res.insert({ std::move(columns[i]), data[i].type, data[i].name });
|
||||
|
||||
@ -381,6 +391,8 @@ Block Block::cloneWithColumns(const Columns & columns) const
|
||||
throw Exception("Cannot clone block with columns because block has " + toString(num_columns) + " columns, "
|
||||
"but " + toString(columns.size()) + " columns given.", ErrorCodes::LOGICAL_ERROR);
|
||||
|
||||
res.reserve(num_columns);
|
||||
|
||||
for (size_t i = 0; i < num_columns; ++i)
|
||||
res.insert({ columns[i], data[i].type, data[i].name });
|
||||
|
||||
@ -393,6 +405,8 @@ Block Block::cloneWithoutColumns() const
|
||||
Block res;
|
||||
|
||||
size_t num_columns = data.size();
|
||||
res.reserve(num_columns);
|
||||
|
||||
for (size_t i = 0; i < num_columns; ++i)
|
||||
res.insert({ nullptr, data[i].type, data[i].name });
|
||||
|
||||
|
||||
@ -152,6 +152,7 @@ public:
|
||||
private:
|
||||
void eraseImpl(size_t position);
|
||||
void initializeIndexByName();
|
||||
void reserve(size_t count);
|
||||
|
||||
/// This is needed to allow function execution over data.
|
||||
/// It is safe because functions does not change column names, so index is unaffected.
|
||||
|
||||
@ -31,6 +31,10 @@ SRCS(
|
||||
MySQL/PacketsProtocolText.cpp
|
||||
MySQL/PacketsReplication.cpp
|
||||
NamesAndTypes.cpp
|
||||
PostgreSQL/Connection.cpp
|
||||
PostgreSQL/PoolWithFailover.cpp
|
||||
PostgreSQL/Utils.cpp
|
||||
PostgreSQL/insertPostgreSQLValue.cpp
|
||||
PostgreSQLProtocol.cpp
|
||||
QueryProcessingStage.cpp
|
||||
Settings.cpp
|
||||
|
||||
@ -49,6 +49,7 @@ SRCS(
|
||||
TTLUpdateInfoAlgorithm.cpp
|
||||
copyData.cpp
|
||||
finalizeBlock.cpp
|
||||
formatBlock.cpp
|
||||
materializeBlock.cpp
|
||||
narrowBlockInputStreams.cpp
|
||||
|
||||
|
||||
@ -1091,7 +1091,14 @@ void AsynchronousMetrics::update(std::chrono::system_clock::time_point update_ti
|
||||
{
|
||||
sensor_file->rewind();
|
||||
Int64 temperature = 0;
|
||||
readText(temperature, *sensor_file);
|
||||
try
|
||||
{
|
||||
readText(temperature, *sensor_file);
|
||||
}
|
||||
catch (const ErrnoException & e)
|
||||
{
|
||||
LOG_DEBUG(&Poco::Logger::get("AsynchronousMetrics"), "Hardware monitor '{}', sensor '{}' exists but could not be read, error {}.", hwmon_name, sensor_name, e.getErrno());
|
||||
}
|
||||
|
||||
if (sensor_name.empty())
|
||||
new_values[fmt::format("Temperature_{}", hwmon_name)] = temperature * 0.001;
|
||||
|
||||
@ -2,6 +2,7 @@
|
||||
|
||||
#include <Columns/ColumnLowCardinality.h>
|
||||
#include <Columns/ColumnNullable.h>
|
||||
#include <Columns/ColumnConst.h>
|
||||
|
||||
#include <DataStreams/materializeBlock.h>
|
||||
|
||||
@ -105,25 +106,57 @@ DataTypePtr convertTypeToNullable(const DataTypePtr & type)
|
||||
return type;
|
||||
}
|
||||
|
||||
/// Convert column to nullable. If column LowCardinality or Const, convert nested column.
|
||||
/// Returns nullptr if conversion cannot be performed.
|
||||
static ColumnPtr tryConvertColumnToNullable(const ColumnPtr & col)
|
||||
{
|
||||
if (isColumnNullable(*col) || col->canBeInsideNullable())
|
||||
return makeNullable(col);
|
||||
|
||||
if (col->lowCardinality())
|
||||
{
|
||||
auto mut_col = IColumn::mutate(std::move(col));
|
||||
ColumnLowCardinality * col_lc = assert_cast<ColumnLowCardinality *>(mut_col.get());
|
||||
if (col_lc->nestedIsNullable())
|
||||
{
|
||||
return mut_col;
|
||||
}
|
||||
else if (col_lc->nestedCanBeInsideNullable())
|
||||
{
|
||||
col_lc->nestedToNullable();
|
||||
return mut_col;
|
||||
}
|
||||
}
|
||||
else if (const ColumnConst * col_const = checkAndGetColumn<ColumnConst>(*col))
|
||||
{
|
||||
const auto & nested = col_const->getDataColumnPtr();
|
||||
if (nested->isNullable() || nested->canBeInsideNullable())
|
||||
{
|
||||
return makeNullable(col);
|
||||
}
|
||||
else if (nested->lowCardinality())
|
||||
{
|
||||
ColumnPtr nested_nullable = tryConvertColumnToNullable(nested);
|
||||
if (nested_nullable)
|
||||
return ColumnConst::create(nested_nullable, col_const->size());
|
||||
}
|
||||
}
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
void convertColumnToNullable(ColumnWithTypeAndName & column)
|
||||
{
|
||||
column.type = convertTypeToNullable(column.type);
|
||||
|
||||
if (!column.column)
|
||||
{
|
||||
column.type = convertTypeToNullable(column.type);
|
||||
return;
|
||||
|
||||
if (column.column->lowCardinality())
|
||||
{
|
||||
/// Convert nested to nullable, not LowCardinality itself
|
||||
auto mut_col = IColumn::mutate(std::move(column.column));
|
||||
ColumnLowCardinality * col_as_lc = assert_cast<ColumnLowCardinality *>(mut_col.get());
|
||||
if (!col_as_lc->nestedIsNullable())
|
||||
col_as_lc->nestedToNullable();
|
||||
column.column = std::move(mut_col);
|
||||
}
|
||||
else if (column.column->canBeInsideNullable())
|
||||
|
||||
ColumnPtr nullable_column = tryConvertColumnToNullable(column.column);
|
||||
if (nullable_column)
|
||||
{
|
||||
column.column = makeNullable(column.column);
|
||||
column.type = convertTypeToNullable(column.type);
|
||||
column.column = std::move(nullable_column);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
@ -21,6 +21,7 @@ SRCS(
|
||||
ASTCreateRowPolicyQuery.cpp
|
||||
ASTCreateSettingsProfileQuery.cpp
|
||||
ASTCreateUserQuery.cpp
|
||||
ASTDatabaseOrNone.cpp
|
||||
ASTDictionary.cpp
|
||||
ASTDictionaryAttributeDeclaration.cpp
|
||||
ASTDropAccessEntityQuery.cpp
|
||||
@ -95,6 +96,7 @@ SRCS(
|
||||
ParserCreateSettingsProfileQuery.cpp
|
||||
ParserCreateUserQuery.cpp
|
||||
ParserDataType.cpp
|
||||
ParserDatabaseOrNone.cpp
|
||||
ParserDescribeTableQuery.cpp
|
||||
ParserDictionary.cpp
|
||||
ParserDictionaryAttributeDeclaration.cpp
|
||||
|
||||
@ -1166,6 +1166,23 @@ void WindowTransform::appendChunk(Chunk & chunk)
|
||||
// Write out the aggregation results.
|
||||
writeOutCurrentRow();
|
||||
|
||||
if (isCancelled())
|
||||
{
|
||||
// Good time to check if the query is cancelled. Checking once
|
||||
// per block might not be enough in severe quadratic cases.
|
||||
// Just leave the work halfway through and return, the 'prepare'
|
||||
// method will figure out what to do. Note that this doesn't
|
||||
// handle 'max_execution_time' and other limits, because these
|
||||
// limits are only updated between blocks. Eventually we should
|
||||
// start updating them in background and canceling the processor,
|
||||
// like we do for Ctrl+C handling.
|
||||
//
|
||||
// This class is final, so the check should hopefully be
|
||||
// devirtualized and become a single never-taken branch that is
|
||||
// basically free.
|
||||
return;
|
||||
}
|
||||
|
||||
// Move to the next row. The frame will have to be recalculated.
|
||||
// The peer group start is updated at the beginning of the loop,
|
||||
// because current_row might now be past-the-end.
|
||||
@ -1255,10 +1272,12 @@ IProcessor::Status WindowTransform::prepare()
|
||||
// next_output_block_number, first_not_ready_row, first_block_number,
|
||||
// blocks.size());
|
||||
|
||||
if (output.isFinished())
|
||||
if (output.isFinished() || isCancelled())
|
||||
{
|
||||
// The consumer asked us not to continue (or we decided it ourselves),
|
||||
// so we abort.
|
||||
// so we abort. Not sure what the difference between the two conditions
|
||||
// is, but it seemed that output.isFinished() is not enough to cancel on
|
||||
// Ctrl+C. Test manually if you change it.
|
||||
input.close();
|
||||
return Status::Finished;
|
||||
}
|
||||
|
||||
@ -80,8 +80,10 @@ struct RowNumber
|
||||
* the order of input data. This property also trivially holds for the ROWS and
|
||||
* GROUPS frames. For the RANGE frame, the proof requires the additional fact
|
||||
* that the ranges are specified in terms of (the single) ORDER BY column.
|
||||
*
|
||||
* `final` is so that the isCancelled() is devirtualized, we call it every row.
|
||||
*/
|
||||
class WindowTransform : public IProcessor /* public ISimpleTransform */
|
||||
class WindowTransform final : public IProcessor
|
||||
{
|
||||
public:
|
||||
WindowTransform(
|
||||
|
||||
@ -7,14 +7,8 @@ PEERDIR(
|
||||
clickhouse/src/Common
|
||||
contrib/libs/msgpack
|
||||
contrib/libs/protobuf
|
||||
contrib/libs/arrow
|
||||
)
|
||||
|
||||
ADDINCL(
|
||||
contrib/libs/arrow/src
|
||||
)
|
||||
|
||||
CFLAGS(-DUSE_ARROW=1)
|
||||
|
||||
SRCS(
|
||||
Chunk.cpp
|
||||
@ -31,11 +25,6 @@ SRCS(
|
||||
Formats/IOutputFormat.cpp
|
||||
Formats/IRowInputFormat.cpp
|
||||
Formats/IRowOutputFormat.cpp
|
||||
Formats/Impl/ArrowBlockInputFormat.cpp
|
||||
Formats/Impl/ArrowBlockOutputFormat.cpp
|
||||
Formats/Impl/ArrowBufferedStreams.cpp
|
||||
Formats/Impl/ArrowColumnToCHColumn.cpp
|
||||
Formats/Impl/CHColumnToArrowColumn.cpp
|
||||
Formats/Impl/BinaryRowInputFormat.cpp
|
||||
Formats/Impl/BinaryRowOutputFormat.cpp
|
||||
Formats/Impl/CSVRowInputFormat.cpp
|
||||
|
||||
@ -146,6 +146,9 @@ try
|
||||
catch (...) /// Exception while we looking for a task, reschedule
|
||||
{
|
||||
tryLogCurrentException(__PRETTY_FUNCTION__);
|
||||
|
||||
/// Why do we scheduleTask again?
|
||||
/// To retry on exception, since it may be some temporary exception.
|
||||
scheduleTask(/* with_backoff = */ true);
|
||||
}
|
||||
|
||||
@ -180,10 +183,16 @@ void IBackgroundJobExecutor::triggerTask()
|
||||
}
|
||||
|
||||
void IBackgroundJobExecutor::backgroundTaskFunction()
|
||||
try
|
||||
{
|
||||
if (!scheduleJob())
|
||||
scheduleTask(/* with_backoff = */ true);
|
||||
}
|
||||
catch (...) /// Catch any exception to avoid thread termination.
|
||||
{
|
||||
tryLogCurrentException(__PRETTY_FUNCTION__);
|
||||
scheduleTask(/* with_backoff = */ true);
|
||||
}
|
||||
|
||||
IBackgroundJobExecutor::~IBackgroundJobExecutor()
|
||||
{
|
||||
|
||||
@ -959,9 +959,19 @@ std::shared_ptr<StorageMergeTree::MergeMutateSelectedEntry> StorageMergeTree::se
|
||||
|
||||
if (!commands_for_size_validation.empty())
|
||||
{
|
||||
MutationsInterpreter interpreter(
|
||||
shared_from_this(), metadata_snapshot, commands_for_size_validation, getContext(), false);
|
||||
commands_size += interpreter.evaluateCommandsSize();
|
||||
try
|
||||
{
|
||||
MutationsInterpreter interpreter(
|
||||
shared_from_this(), metadata_snapshot, commands_for_size_validation, getContext(), false);
|
||||
commands_size += interpreter.evaluateCommandsSize();
|
||||
}
|
||||
catch (...)
|
||||
{
|
||||
MergeTreeMutationEntry & entry = it->second;
|
||||
entry.latest_fail_time = time(nullptr);
|
||||
entry.latest_fail_reason = getCurrentExceptionMessage(false);
|
||||
continue;
|
||||
}
|
||||
}
|
||||
|
||||
if (current_ast_elements + commands_size >= max_ast_elements)
|
||||
@ -971,17 +981,21 @@ std::shared_ptr<StorageMergeTree::MergeMutateSelectedEntry> StorageMergeTree::se
|
||||
commands.insert(commands.end(), it->second.commands.begin(), it->second.commands.end());
|
||||
}
|
||||
|
||||
auto new_part_info = part->info;
|
||||
new_part_info.mutation = current_mutations_by_version.rbegin()->first;
|
||||
if (!commands.empty())
|
||||
{
|
||||
auto new_part_info = part->info;
|
||||
new_part_info.mutation = current_mutations_by_version.rbegin()->first;
|
||||
|
||||
future_part.parts.push_back(part);
|
||||
future_part.part_info = new_part_info;
|
||||
future_part.name = part->getNewName(new_part_info);
|
||||
future_part.type = part->getType();
|
||||
future_part.parts.push_back(part);
|
||||
future_part.part_info = new_part_info;
|
||||
future_part.name = part->getNewName(new_part_info);
|
||||
future_part.type = part->getType();
|
||||
|
||||
tagger = std::make_unique<CurrentlyMergingPartsTagger>(future_part, MergeTreeDataMergerMutator::estimateNeededDiskSpace({part}), *this, metadata_snapshot, true);
|
||||
return std::make_shared<MergeMutateSelectedEntry>(future_part, std::move(tagger), commands);
|
||||
tagger = std::make_unique<CurrentlyMergingPartsTagger>(future_part, MergeTreeDataMergerMutator::estimateNeededDiskSpace({part}), *this, metadata_snapshot, true);
|
||||
return std::make_shared<MergeMutateSelectedEntry>(future_part, std::move(tagger), commands);
|
||||
}
|
||||
}
|
||||
|
||||
return {};
|
||||
}
|
||||
|
||||
@ -1036,6 +1050,7 @@ bool StorageMergeTree::scheduleDataProcessingJob(IBackgroundJobExecutor & execut
|
||||
|
||||
auto share_lock = lockForShare(RWLockImpl::NO_QUERY, getSettings()->lock_acquire_timeout_for_background_operations);
|
||||
|
||||
bool has_mutations;
|
||||
{
|
||||
std::unique_lock lock(currently_processing_in_background_mutex);
|
||||
if (merger_mutator.merges_blocker.isCancelled())
|
||||
@ -1044,6 +1059,15 @@ bool StorageMergeTree::scheduleDataProcessingJob(IBackgroundJobExecutor & execut
|
||||
merge_entry = selectPartsToMerge(metadata_snapshot, false, {}, false, nullptr, share_lock, lock);
|
||||
if (!merge_entry)
|
||||
mutate_entry = selectPartsToMutate(metadata_snapshot, nullptr, share_lock);
|
||||
|
||||
has_mutations = !current_mutations_by_version.empty();
|
||||
}
|
||||
|
||||
if (!mutate_entry && has_mutations)
|
||||
{
|
||||
/// Notify in case of errors
|
||||
std::lock_guard lock(mutation_wait_mutex);
|
||||
mutation_wait_event.notify_all();
|
||||
}
|
||||
|
||||
if (merge_entry)
|
||||
|
||||
@ -141,6 +141,7 @@ SRCS(
|
||||
StorageMerge.cpp
|
||||
StorageMergeTree.cpp
|
||||
StorageMongoDB.cpp
|
||||
StorageMongoDBSocketFactory.cpp
|
||||
StorageMySQL.cpp
|
||||
StorageNull.cpp
|
||||
StorageReplicatedMergeTree.cpp
|
||||
|
||||
@ -647,7 +647,7 @@ def run_tests_array(all_tests_with_params):
|
||||
failures_chain += 1
|
||||
status += MSG_FAIL
|
||||
status += print_test_time(total_time)
|
||||
status += " - having exception:\n{}\n".format(
|
||||
status += " - having exception in stdout:\n{}\n".format(
|
||||
'\n'.join(stdout.split('\n')[:100]))
|
||||
status += 'Database: ' + testcase_args.testcase_database
|
||||
elif reference_file is None:
|
||||
|
||||
@ -0,0 +1,3 @@
|
||||
Started
|
||||
Sent kill request
|
||||
Exit 138
|
||||
36
tests/queries/0_stateless/01572_kill_window_function.sh
Executable file
36
tests/queries/0_stateless/01572_kill_window_function.sh
Executable file
@ -0,0 +1,36 @@
|
||||
#!/usr/bin/env bash
|
||||
|
||||
CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
|
||||
# shellcheck source=../shell_config.sh
|
||||
. "$CURDIR"/../shell_config.sh
|
||||
|
||||
set -e -o pipefail
|
||||
|
||||
# Run a test query that takes very long to run.
|
||||
query_id="01572_kill_window_function-$CLICKHOUSE_DATABASE"
|
||||
$CLICKHOUSE_CLIENT --query_id="$query_id" --query "SELECT count(1048575) OVER (PARTITION BY intDiv(NULL, number) ORDER BY number DESC NULLS FIRST ROWS BETWEEN CURRENT ROW AND 1048575 FOLLOWING) FROM numbers(255, 1048575)" >/dev/null 2>&1 &
|
||||
client_pid=$!
|
||||
echo Started
|
||||
|
||||
# Use one query to both kill the test query and verify that it has started,
|
||||
# because if we try to kill it before it starts, the test will fail.
|
||||
while [ -z "$($CLICKHOUSE_CLIENT --query "kill query where query_id = '$query_id' and current_database = currentDatabase()")" ]
|
||||
do
|
||||
# If we don't yet see the query in the process list, the client should still
|
||||
# be running. The query is very long.
|
||||
kill -0 -- $client_pid
|
||||
sleep 1
|
||||
done
|
||||
echo Sent kill request
|
||||
|
||||
# Wait for the client to terminate.
|
||||
client_exit_code=0
|
||||
wait $client_pid || client_exit_code=$?
|
||||
|
||||
echo "Exit $client_exit_code"
|
||||
|
||||
# We have tested for Ctrl+C.
|
||||
# The following client flags don't cancel, but should: --max_execution_time,
|
||||
# --receive_timeout. Probably needs asynchonous calculation of query limits, as
|
||||
# discussed with Nikolay on TG: https://t.me/c/1214350934/21492
|
||||
|
||||
40
tests/queries/0_stateless/02003_memory_limit_in_client.expect
Executable file
40
tests/queries/0_stateless/02003_memory_limit_in_client.expect
Executable file
@ -0,0 +1,40 @@
|
||||
#!/usr/bin/expect -f
|
||||
|
||||
# This is a test for system.warnings. Testing in interactive mode is necessary,
|
||||
# as we want to see certain warnings from client
|
||||
|
||||
log_user 0
|
||||
set timeout 60
|
||||
match_max 100000
|
||||
|
||||
# A default timeout action is to do nothing, change it to fail
|
||||
expect_after {
|
||||
timeout {
|
||||
exit 1
|
||||
}
|
||||
}
|
||||
|
||||
set basedir [file dirname $argv0]
|
||||
spawn bash -c "source $basedir/../shell_config.sh ; \$CLICKHOUSE_CLIENT_BINARY \$CLICKHOUSE_CLIENT_OPT --disable_suggestion --max_memory_usage_in_client=1"
|
||||
expect ":) "
|
||||
|
||||
send -- "SELECT arrayMap(x -> range(x), range(number)) FROM numbers(1000)\r"
|
||||
expect "Code: 241"
|
||||
|
||||
expect ":) "
|
||||
|
||||
# Exit.
|
||||
send -- "\4"
|
||||
expect eof
|
||||
|
||||
set basedir [file dirname $argv0]
|
||||
spawn bash -c "source $basedir/../shell_config.sh ; \$CLICKHOUSE_CLIENT_BINARY \$CLICKHOUSE_CLIENT_OPT --disable_suggestion --max_memory_usage_in_client=1"
|
||||
expect ":) "
|
||||
|
||||
send -- "SELECT * FROM (SELECT * FROM system.numbers LIMIT 600000) as num WHERE num.number=60000\r"
|
||||
expect "60000"
|
||||
expect ":) "
|
||||
|
||||
# Exit.
|
||||
send -- "\4"
|
||||
expect eof
|
||||
@ -0,0 +1,33 @@
|
||||
SET mutations_sync=2;
|
||||
|
||||
DROP TABLE IF EXISTS rep_data;
|
||||
CREATE TABLE rep_data
|
||||
(
|
||||
p Int,
|
||||
t DateTime,
|
||||
INDEX idx t TYPE minmax GRANULARITY 1
|
||||
)
|
||||
ENGINE = ReplicatedMergeTree('/clickhouse/tables/{database}/rep_data', '1')
|
||||
PARTITION BY p
|
||||
ORDER BY t
|
||||
SETTINGS number_of_free_entries_in_pool_to_execute_mutation=0;
|
||||
INSERT INTO rep_data VALUES (1, now());
|
||||
ALTER TABLE rep_data MATERIALIZE INDEX idx IN PARTITION ID 'NO_SUCH_PART'; -- { serverError 248 }
|
||||
ALTER TABLE rep_data MATERIALIZE INDEX idx IN PARTITION ID '1';
|
||||
ALTER TABLE rep_data MATERIALIZE INDEX idx IN PARTITION ID '2';
|
||||
|
||||
DROP TABLE IF EXISTS data;
|
||||
CREATE TABLE data
|
||||
(
|
||||
p Int,
|
||||
t DateTime,
|
||||
INDEX idx t TYPE minmax GRANULARITY 1
|
||||
)
|
||||
ENGINE = MergeTree
|
||||
PARTITION BY p
|
||||
ORDER BY t
|
||||
SETTINGS number_of_free_entries_in_pool_to_execute_mutation=0;
|
||||
INSERT INTO data VALUES (1, now());
|
||||
ALTER TABLE data MATERIALIZE INDEX idx IN PARTITION ID 'NO_SUCH_PART'; -- { serverError 341 }
|
||||
ALTER TABLE data MATERIALIZE INDEX idx IN PARTITION ID '1';
|
||||
ALTER TABLE data MATERIALIZE INDEX idx IN PARTITION ID '2';
|
||||
8
tests/queries/0_stateless/02007_join_use_nulls.reference
Normal file
8
tests/queries/0_stateless/02007_join_use_nulls.reference
Normal file
@ -0,0 +1,8 @@
|
||||
1 2 3 1 3
|
||||
1 UInt8 2 UInt8 3 Nullable(UInt8)
|
||||
1 LowCardinality(UInt8) 2 LowCardinality(UInt8) 3 LowCardinality(Nullable(UInt8))
|
||||
1 LowCardinality(UInt8) 2 LowCardinality(UInt8) 1 LowCardinality(Nullable(UInt8))
|
||||
1 UInt8 2 UInt8 3 Nullable(UInt8)
|
||||
1 UInt8 2 UInt8 1 Nullable(UInt8) 3 Nullable(UInt8)
|
||||
1 LowCardinality(UInt8) 2 LowCardinality(UInt8) 3 LowCardinality(Nullable(UInt8))
|
||||
1 LowCardinality(UInt8) 2 LowCardinality(UInt8) 1 LowCardinality(Nullable(UInt8)) 3 LowCardinality(Nullable(UInt8))
|
||||
11
tests/queries/0_stateless/02007_join_use_nulls.sql
Normal file
11
tests/queries/0_stateless/02007_join_use_nulls.sql
Normal file
@ -0,0 +1,11 @@
|
||||
SET join_use_nulls = 1;
|
||||
|
||||
SELECT *, d.* FROM ( SELECT 1 AS id, 2 AS value ) a SEMI LEFT JOIN ( SELECT 1 AS id, 3 AS values ) AS d USING id;
|
||||
|
||||
SELECT id, toTypeName(id), value, toTypeName(value), d.values, toTypeName(d.values) FROM ( SELECT 1 AS id, 2 AS value ) a SEMI LEFT JOIN ( SELECT 1 AS id, 3 AS values ) AS d USING id;
|
||||
SELECT id, toTypeName(id), value, toTypeName(value), d.values, toTypeName(d.values) FROM ( SELECT toLowCardinality(1) AS id, toLowCardinality(2) AS value ) a SEMI LEFT JOIN ( SELECT toLowCardinality(1) AS id, toLowCardinality(3) AS values ) AS d USING id;
|
||||
SELECT id, toTypeName(id), value, toTypeName(value), d.id, toTypeName(d.id) FROM ( SELECT toLowCardinality(1) AS id, toLowCardinality(2) AS value ) a SEMI LEFT JOIN ( SELECT toLowCardinality(1) AS id, toLowCardinality(3) AS values ) AS d USING id;
|
||||
SELECT id, toTypeName(id), value, toTypeName(value), d.values, toTypeName(d.values) FROM ( SELECT 1 AS id, 2 AS value ) a SEMI LEFT JOIN ( SELECT 1 AS id, 3 AS values ) AS d USING id;
|
||||
SELECT id, toTypeName(id), value, toTypeName(value), d.id, toTypeName(d.id) , d.values, toTypeName(d.values) FROM ( SELECT 1 AS id, 2 AS value ) a SEMI LEFT JOIN ( SELECT 1 AS id, 3 AS values ) AS d USING id;
|
||||
SELECT id, toTypeName(id), value, toTypeName(value), d.values, toTypeName(d.values) FROM ( SELECT toLowCardinality(1) AS id, toLowCardinality(2) AS value ) a SEMI LEFT JOIN ( SELECT toLowCardinality(1) AS id, toLowCardinality(3) AS values ) AS d USING id;
|
||||
SELECT id, toTypeName(id), value, toTypeName(value), d.id, toTypeName(d.id) , d.values, toTypeName(d.values) FROM ( SELECT toLowCardinality(1) AS id, toLowCardinality(2) AS value ) a SEMI LEFT JOIN ( SELECT toLowCardinality(1) AS id, toLowCardinality(3) AS values ) AS d USING id;
|
||||
@ -2,19 +2,9 @@
|
||||
<div class="container text-center">
|
||||
<h2 id="success-stories" class="display-4">Success stories</h2>
|
||||
<div class="row">
|
||||
<div class="col-lg-4 py-3">
|
||||
<a href="https://blog.cloudflare.com/http-analytics-for-6m-requests-per-second-using-clickhouse/" class="text-reset text-decoration-none" rel="external nofollow noreferrer" target="_blank">
|
||||
<div class="card py-3 dots-lb">
|
||||
<div class="card-body">
|
||||
<h4 class="card-title">HTTP and DNS analytics</h4>
|
||||
<p class="card-text text-muted">by Cloudflare</p>
|
||||
</div>
|
||||
</div>
|
||||
</a>
|
||||
</div>
|
||||
<div class="col-lg-4 py-3">
|
||||
<a href="docs/en/introduction/history/" class="text-reset text-decoration-none">
|
||||
<div class="card py-3 dots-cc">
|
||||
<div class="card py-3 dots-lb">
|
||||
<div class="card-body">
|
||||
<h4 class="card-title">Yandex Metrica</h4>
|
||||
<p class="card-text text-muted">The original usecase</p>
|
||||
@ -23,11 +13,21 @@
|
||||
</a>
|
||||
</div>
|
||||
<div class="col-lg-4 py-3">
|
||||
<a href="https://www.slideshare.net/glebus/using-clickhouse-for-experimentation-104247173" class="text-reset text-decoration-none" rel="external nofollow noreferrer" target="_blank">
|
||||
<a href="https://eng.uber.com/logging/" class="text-reset text-decoration-none" rel="external nofollow noreferrer" target="_blank">
|
||||
<div class="card py-3 dots-cc">
|
||||
<div class="card-body">
|
||||
<h4 class="card-title">Log Platform</h4>
|
||||
<p class="card-text text-muted">at Uber</p>
|
||||
</div>
|
||||
</div>
|
||||
</a>
|
||||
</div>
|
||||
<div class="col-lg-4 py-3">
|
||||
<a href="https://tech.ebayinc.com/engineering/ou-online-analytical-processing/" class="text-reset text-decoration-none" rel="external nofollow noreferrer" target="_blank">
|
||||
<div class="card py-3 dots-rb">
|
||||
<div class="card-body">
|
||||
<h4 class="card-title">Experimentation</h4>
|
||||
<p class="card-text text-muted">at Spotify</p>
|
||||
<h4 class="card-title">Analytical Processing</h4>
|
||||
<p class="card-text text-muted">at eBay</p>
|
||||
</div>
|
||||
</div>
|
||||
</a>
|
||||
@ -35,31 +35,31 @@
|
||||
</div>
|
||||
<div class="row">
|
||||
<div class="col-lg-4 py-3">
|
||||
<a href="https://translate.yandex.com/translate?url=http%3A%2F%2Fwww.jianshu.com%2Fp%2F4c86a2478cca&lang=zh-en" class="text-reset text-decoration-none" rel="external nofollow noreferrer" target="_blank">
|
||||
<a href="https://blog.cloudflare.com/http-analytics-for-6m-requests-per-second-using-clickhouse/" class="text-reset text-decoration-none" rel="external nofollow noreferrer" target="_blank">
|
||||
<div class="card py-3 dots-rb">
|
||||
<div class="card-body">
|
||||
<h4 class="card-title">OLAP contest victory</h4>
|
||||
<p class="card-text text-muted">by Analysys</p>
|
||||
<h4 class="card-title">HTTP and DNS analytics</h4>
|
||||
<p class="card-text text-muted">at Cloudflare</p>
|
||||
</div>
|
||||
</div>
|
||||
</a>
|
||||
</div>
|
||||
<div class="col-lg-4 py-3">
|
||||
<a href="https://translate.yandex.com/translate?url=http%3A%2F%2Fsouslecapot.net%2F2018%2F11%2F21%2Fpatrick-chatain-vp-engineering-chez-contentsquare-penser-davantage-amelioration-continue-que-revolution-constante%2F&lang=fr-en" class="text-reset text-decoration-none" rel="external nofollow noreferrer" target="_blank">
|
||||
<a href="https://www.slideshare.net/glebus/using-clickhouse-for-experimentation-104247173" class="text-reset text-decoration-none" rel="external nofollow noreferrer" target="_blank">
|
||||
<div class="card py-3 dots-rhb">
|
||||
<div class="card-body">
|
||||
<h4 class="card-title">Digital experience analytics</h4>
|
||||
<p class="card-text text-muted">by ContentSquare</p>
|
||||
<h4 class="card-title">Experimentation</h4>
|
||||
<p class="card-text text-muted">at Spotify</p>
|
||||
</div>
|
||||
</div>
|
||||
</a>
|
||||
</div>
|
||||
<div class="col-lg-4 py-3">
|
||||
<a href="https://translate.yandex.com/translate?url=https%3A%2F%2Ftech.geniee.co.jp%2Fentry%2F2017%2F07%2F20%2F160100" class="text-reset text-decoration-none" rel="external nofollow noreferrer" target="_blank">
|
||||
<a href="https://bigdatadays.ru/wp-content/uploads/2019/10/D2-H3-3_Yakunin-Goihburg.pdf" class="text-reset text-decoration-none" rel="external nofollow noreferrer" target="_blank">
|
||||
<div class="card py-3 dots-lb">
|
||||
<div class="card-body">
|
||||
<h4 class="card-title">Speeding up Report API</h4>
|
||||
<p class="card-text text-muted">at Geniee</p>
|
||||
<h4 class="card-title">Business Intelligence</h4>
|
||||
<p class="card-text text-muted">at Deutsche Bank</p>
|
||||
</div>
|
||||
</div>
|
||||
</a>
|
||||
|
||||
Loading…
Reference in New Issue
Block a user