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+## ClickHouse release 21.2
+
+### ClickHouse release v21.2.2.8-stable, 2021-02-07
+
+#### Backward Incompatible Change
+
+* Bitwise functions (`bitAnd`, `bitOr`, etc) are forbidden for floating point arguments. Now you have to do explicit cast to integer. [#19853](https://github.com/ClickHouse/ClickHouse/pull/19853) ([Azat Khuzhin](https://github.com/azat)).
+* Forbid `lcm`/`gcd` for floats. [#19532](https://github.com/ClickHouse/ClickHouse/pull/19532) ([Azat Khuzhin](https://github.com/azat)).
+* Fix memory tracking for `OPTIMIZE TABLE`/merges; account query memory limits and sampling for `OPTIMIZE TABLE`/merges. [#18772](https://github.com/ClickHouse/ClickHouse/pull/18772) ([Azat Khuzhin](https://github.com/azat)).
+* Disallow floating point column as partition key, see [#18421](https://github.com/ClickHouse/ClickHouse/issues/18421#event-4147046255). [#18464](https://github.com/ClickHouse/ClickHouse/pull/18464) ([hexiaoting](https://github.com/hexiaoting)).
+* Excessive parenthesis in type definitions no longer supported, example: `Array((UInt8))`.
+
+#### New Feature
+
+* Added `PostgreSQL` table engine (both select/insert, with support for multidimensional arrays), also as table function. Added `PostgreSQL` dictionary source. Added `PostgreSQL` database engine. [#18554](https://github.com/ClickHouse/ClickHouse/pull/18554) ([Kseniia Sumarokova](https://github.com/kssenii)).
+* Data type `Nested` now supports arbitrary levels of nesting. Introduced subcolumns of complex types, such as `size0` in `Array`, `null` in `Nullable`, names of `Tuple` elements, which can be read without reading of whole column. [#17310](https://github.com/ClickHouse/ClickHouse/pull/17310) ([Anton Popov](https://github.com/CurtizJ)).
+* Added `Nullable` support for `FlatDictionary`, `HashedDictionary`, `ComplexKeyHashedDictionary`, `DirectDictionary`, `ComplexKeyDirectDictionary`, `RangeHashedDictionary`. [#18236](https://github.com/ClickHouse/ClickHouse/pull/18236) ([Maksim Kita](https://github.com/kitaisreal)).
+* Adds a new table called `system.distributed_ddl_queue` that displays the queries in the DDL worker queue. [#17656](https://github.com/ClickHouse/ClickHouse/pull/17656) ([Bharat Nallan](https://github.com/bharatnc)).
+* Added support of mapping LDAP group names, and attribute values in general, to local roles for users from ldap user directories. [#17211](https://github.com/ClickHouse/ClickHouse/pull/17211) ([Denis Glazachev](https://github.com/traceon)).
+* Support insert into table function `cluster`, and for both table functions `remote` and `cluster`, support distributing data across nodes by specify sharding key. Close [#16752](https://github.com/ClickHouse/ClickHouse/issues/16752). [#18264](https://github.com/ClickHouse/ClickHouse/pull/18264) ([flynn](https://github.com/ucasFL)).
+* Add function `decodeXMLComponent` to decode characters for XML. Example: `SELECT decodeXMLComponent('Hello,"world"!')` [#17659](https://github.com/ClickHouse/ClickHouse/issues/17659). [#18542](https://github.com/ClickHouse/ClickHouse/pull/18542) ([nauta](https://github.com/nautaa)).
+* Added functions `parseDateTimeBestEffortUSOrZero`, `parseDateTimeBestEffortUSOrNull`. [#19712](https://github.com/ClickHouse/ClickHouse/pull/19712) ([Maksim Kita](https://github.com/kitaisreal)).
+* Add `sign` math function. [#19527](https://github.com/ClickHouse/ClickHouse/pull/19527) ([flynn](https://github.com/ucasFL)).
+* Add information about used features (functions, table engines, etc) into system.query_log. [#18495](https://github.com/ClickHouse/ClickHouse/issues/18495). [#19371](https://github.com/ClickHouse/ClickHouse/pull/19371) ([Kseniia Sumarokova](https://github.com/kssenii)).
+* Function `formatDateTime` support the `%Q` modification to format date to quarter. [#19224](https://github.com/ClickHouse/ClickHouse/pull/19224) ([Jianmei Zhang](https://github.com/zhangjmruc)).
+* Support MetaKey+Enter hotkey binding in play UI. [#19012](https://github.com/ClickHouse/ClickHouse/pull/19012) ([sundyli](https://github.com/sundy-li)).
+* Add three functions for map data type: 1. `mapContains(map, key)` to check weather map.keys include the second parameter key. 2. `mapKeys(map)` return all the keys in Array format 3. `mapValues(map)` return all the values in Array format. [#18788](https://github.com/ClickHouse/ClickHouse/pull/18788) ([hexiaoting](https://github.com/hexiaoting)).
+* Add `log_comment` setting related to [#18494](https://github.com/ClickHouse/ClickHouse/issues/18494). [#18549](https://github.com/ClickHouse/ClickHouse/pull/18549) ([Zijie Lu](https://github.com/TszKitLo40)).
+* Add support of tuple argument to `argMin` and `argMax` functions. [#17359](https://github.com/ClickHouse/ClickHouse/pull/17359) ([Ildus Kurbangaliev](https://github.com/ildus)).
+* Support `EXISTS VIEW` syntax. [#18552](https://github.com/ClickHouse/ClickHouse/pull/18552) ([Du Chuan](https://github.com/spongedu)).
+* Add `SELECT ALL` syntax. closes [#18706](https://github.com/ClickHouse/ClickHouse/issues/18706). [#18723](https://github.com/ClickHouse/ClickHouse/pull/18723) ([flynn](https://github.com/ucasFL)).
+
+#### Performance Improvement
+
+* Faster parts removal by lowering the number of `stat` syscalls. This returns the optimization that existed while ago. More safe interface of `IDisk`. This closes [#19065](https://github.com/ClickHouse/ClickHouse/issues/19065). [#19086](https://github.com/ClickHouse/ClickHouse/pull/19086) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Aliases declared in `WITH` statement are properly used in index analysis. Queries like `WITH column AS alias SELECT ... WHERE alias = ...` may use index now. [#18896](https://github.com/ClickHouse/ClickHouse/pull/18896) ([Amos Bird](https://github.com/amosbird)).
+* Add `optimize_alias_column_prediction` (on by default), that will: - Respect aliased columns in WHERE during partition pruning and skipping data using secondary indexes; - Respect aliased columns in WHERE for trivial count queries for optimize_trivial_count; - Respect aliased columns in GROUP BY/ORDER BY for optimize_aggregation_in_order/optimize_read_in_order. [#16995](https://github.com/ClickHouse/ClickHouse/pull/16995) ([sundyli](https://github.com/sundy-li)).
+* Speed up aggregate function `sum`. Improvement only visible on synthetic benchmarks and not very practical. [#19216](https://github.com/ClickHouse/ClickHouse/pull/19216) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Update libc++ and use another ABI to provide better performance. [#18914](https://github.com/ClickHouse/ClickHouse/pull/18914) ([Danila Kutenin](https://github.com/danlark1)).
+* Rewrite `sumIf()` and `sum(if())` function to `countIf()` function when logically equivalent. [#17041](https://github.com/ClickHouse/ClickHouse/pull/17041) ([flynn](https://github.com/ucasFL)).
+* Use a connection pool for S3 connections, controlled by the `s3_max_connections` settings. [#13405](https://github.com/ClickHouse/ClickHouse/pull/13405) ([Vladimir Chebotarev](https://github.com/excitoon)).
+* Add support for zstd long option for better compression of string columns to save space. [#17184](https://github.com/ClickHouse/ClickHouse/pull/17184) ([ygrek](https://github.com/ygrek)).
+* Slightly improve server latency by removing access to configuration on every connection. [#19863](https://github.com/ClickHouse/ClickHouse/pull/19863) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Reduce lock contention for multiple layers of the `Buffer` engine. [#19379](https://github.com/ClickHouse/ClickHouse/pull/19379) ([Azat Khuzhin](https://github.com/azat)).
+* Support splitting `Filter` step of query plan into `Expression + Filter` pair. Together with `Expression + Expression` merging optimization ([#17458](https://github.com/ClickHouse/ClickHouse/issues/17458)) it may delay execution for some expressions after `Filter` step. [#19253](https://github.com/ClickHouse/ClickHouse/pull/19253) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+
+#### Improvement
+
+* `SELECT count() FROM table` now can be executed if only one any column can be selected from the `table`. This PR fixes [#10639](https://github.com/ClickHouse/ClickHouse/issues/10639). [#18233](https://github.com/ClickHouse/ClickHouse/pull/18233) ([Vitaly Baranov](https://github.com/vitlibar)).
+* Set charset to `utf8mb4` when interacting with remote MySQL servers. Fixes [#19795](https://github.com/ClickHouse/ClickHouse/issues/19795). [#19800](https://github.com/ClickHouse/ClickHouse/pull/19800) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* `S3` table function now supports `auto` compression mode (autodetect). This closes [#18754](https://github.com/ClickHouse/ClickHouse/issues/18754). [#19793](https://github.com/ClickHouse/ClickHouse/pull/19793) ([Vladimir Chebotarev](https://github.com/excitoon)).
+* Correctly output infinite arguments for `formatReadableTimeDelta` function. In previous versions, there was implicit conversion to implementation specific integer value. [#19791](https://github.com/ClickHouse/ClickHouse/pull/19791) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Table function `S3` will use global region if the region can't be determined exactly. This closes [#10998](https://github.com/ClickHouse/ClickHouse/issues/10998). [#19750](https://github.com/ClickHouse/ClickHouse/pull/19750) ([Vladimir Chebotarev](https://github.com/excitoon)).
+* In distributed queries if the setting `async_socket_for_remote` is enabled, it was possible to get stack overflow at least in debug build configuration if very deeply nested data type is used in table (e.g. `Array(Array(Array(...more...)))`). This fixes [#19108](https://github.com/ClickHouse/ClickHouse/issues/19108). This change introduces minor backward incompatibility: excessive parenthesis in type definitions no longer supported, example: `Array((UInt8))`. [#19736](https://github.com/ClickHouse/ClickHouse/pull/19736) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Add separate pool for message brokers (RabbitMQ and Kafka). [#19722](https://github.com/ClickHouse/ClickHouse/pull/19722) ([Azat Khuzhin](https://github.com/azat)).
+* Fix rare `max_number_of_merges_with_ttl_in_pool` limit overrun (more merges with TTL can be assigned) for non-replicated MergeTree. [#19708](https://github.com/ClickHouse/ClickHouse/pull/19708) ([alesapin](https://github.com/alesapin)).
+* Dictionary: better error message during attribute parsing. [#19678](https://github.com/ClickHouse/ClickHouse/pull/19678) ([Maksim Kita](https://github.com/kitaisreal)).
+* Add an option to disable validation of checksums on reading. Should never be used in production. Please do not expect any benefits in disabling it. It may only be used for experiments and benchmarks. The setting only applicable for tables of MergeTree family. Checksums are always validated for other table engines and when receiving data over network. In my observations there is no performance difference or it is less than 0.5%. [#19588](https://github.com/ClickHouse/ClickHouse/pull/19588) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Support constant result in function `multiIf`. [#19533](https://github.com/ClickHouse/ClickHouse/pull/19533) ([Maksim Kita](https://github.com/kitaisreal)).
+* Enable function length/empty/notEmpty for datatype Map, which returns keys number in Map. [#19530](https://github.com/ClickHouse/ClickHouse/pull/19530) ([taiyang-li](https://github.com/taiyang-li)).
+* Add `--reconnect` option to `clickhouse-benchmark`. When this option is specified, it will reconnect before every request. This is needed for testing. [#19872](https://github.com/ClickHouse/ClickHouse/pull/19872) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Support using the new location of `.debug` file. This fixes [#19348](https://github.com/ClickHouse/ClickHouse/issues/19348). [#19520](https://github.com/ClickHouse/ClickHouse/pull/19520) ([Amos Bird](https://github.com/amosbird)).
+* `toIPv6` function parses `IPv4` addresses. [#19518](https://github.com/ClickHouse/ClickHouse/pull/19518) ([Bharat Nallan](https://github.com/bharatnc)).
+* Add `http_referer` field to `system.query_log`, `system.processes`, etc. This closes [#19389](https://github.com/ClickHouse/ClickHouse/issues/19389). [#19390](https://github.com/ClickHouse/ClickHouse/pull/19390) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Improve MySQL compatibility by making more functions case insensitive and adding aliases. [#19387](https://github.com/ClickHouse/ClickHouse/pull/19387) ([Daniil Kondratyev](https://github.com/dankondr)).
+* Add metrics for MergeTree parts (Wide/Compact/InMemory) types. [#19381](https://github.com/ClickHouse/ClickHouse/pull/19381) ([Azat Khuzhin](https://github.com/azat)).
+* Allow docker to be executed with arbitrary uid. [#19374](https://github.com/ClickHouse/ClickHouse/pull/19374) ([filimonov](https://github.com/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](https://github.com/ClickHouse/ClickHouse/issues/19184). [#19339](https://github.com/ClickHouse/ClickHouse/pull/19339) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Allow change `max_server_memory_usage` without restart. This closes [#18154](https://github.com/ClickHouse/ClickHouse/issues/18154). [#19186](https://github.com/ClickHouse/ClickHouse/pull/19186) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* The exception when function `bar` is called with certain NaN argument may be slightly misleading in previous versions. This fixes [#19088](https://github.com/ClickHouse/ClickHouse/issues/19088). [#19107](https://github.com/ClickHouse/ClickHouse/pull/19107) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Explicitly set uid / gid of clickhouse user & group to the fixed values (101) in clickhouse-server images. [#19096](https://github.com/ClickHouse/ClickHouse/pull/19096) ([filimonov](https://github.com/filimonov)).
+* Fixed `PeekableReadBuffer: Memory limit exceed` error when inserting data with huge strings. Fixes [#18690](https://github.com/ClickHouse/ClickHouse/issues/18690). [#18979](https://github.com/ClickHouse/ClickHouse/pull/18979) ([tavplubix](https://github.com/tavplubix)).
+* Docker image: several improvements for clickhouse-server entrypoint. [#18954](https://github.com/ClickHouse/ClickHouse/pull/18954) ([filimonov](https://github.com/filimonov)).
+* Add `normalizeQueryKeepNames` and `normalizedQueryHashKeepNames` to normalize queries without masking long names with `?`. This helps better analyze complex query logs. [#18910](https://github.com/ClickHouse/ClickHouse/pull/18910) ([Amos Bird](https://github.com/amosbird)).
+* Check per-block checksum of the distributed batch on the sender before sending (without reading the file twice, the checksums will be verified while reading), this will avoid stuck of the INSERT on the receiver (on truncated .bin file on the sender). Avoid reading .bin files twice for batched INSERT (it was required to calculate rows/bytes to take squashing into account, now this information included into the header, backward compatible is preserved). [#18853](https://github.com/ClickHouse/ClickHouse/pull/18853) ([Azat Khuzhin](https://github.com/azat)).
+* Fix issues with RIGHT and FULL JOIN of tables with aggregate function states. In previous versions exception about `cloneResized` method was thrown. [#18818](https://github.com/ClickHouse/ClickHouse/pull/18818) ([templarzq](https://github.com/templarzq)).
+* Added prefix-based S3 endpoint settings. [#18812](https://github.com/ClickHouse/ClickHouse/pull/18812) ([Vladimir Chebotarev](https://github.com/excitoon)).
+* Add [UInt8, UInt16, UInt32, UInt64] arguments types support for bitmapTransform, bitmapSubsetInRange, bitmapSubsetLimit, bitmapContains functions. This closes [#18713](https://github.com/ClickHouse/ClickHouse/issues/18713). [#18791](https://github.com/ClickHouse/ClickHouse/pull/18791) ([sundyli](https://github.com/sundy-li)).
+* Allow CTE (Common Table Expressions) to be further aliased. Propagate CSE (Common Subexpressions Elimination) to subqueries in the same level when `enable_global_with_statement = 1`. This fixes [#17378](https://github.com/ClickHouse/ClickHouse/issues/17378) . This fixes https://github.com/ClickHouse/ClickHouse/pull/16575#issuecomment-753416235 . [#18684](https://github.com/ClickHouse/ClickHouse/pull/18684) ([Amos Bird](https://github.com/amosbird)).
+* Update librdkafka to v1.6.0-RC2. Fixes [#18668](https://github.com/ClickHouse/ClickHouse/issues/18668). [#18671](https://github.com/ClickHouse/ClickHouse/pull/18671) ([filimonov](https://github.com/filimonov)).
+* In case of unexpected exceptions automatically restart background thread which is responsible for execution of distributed DDL queries. Fixes [#17991](https://github.com/ClickHouse/ClickHouse/issues/17991). [#18285](https://github.com/ClickHouse/ClickHouse/pull/18285) ([徐炘](https://github.com/weeds085490)).
+* Updated AWS C++ SDK in order to utilize global regions in S3. [#17870](https://github.com/ClickHouse/ClickHouse/pull/17870) ([Vladimir Chebotarev](https://github.com/excitoon)).
+* Added support for `WITH ... [AND] [PERIODIC] REFRESH [interval_in_sec]` clause when creating `LIVE VIEW` tables. [#14822](https://github.com/ClickHouse/ClickHouse/pull/14822) ([vzakaznikov](https://github.com/vzakaznikov)).
+* Restrict `MODIFY TTL` queries for `MergeTree` tables created in old syntax. Previously the query succeeded, but actually it had no effect. [#19064](https://github.com/ClickHouse/ClickHouse/pull/19064) ([Anton Popov](https://github.com/CurtizJ)).
+
+#### Bug Fix
+
+* Fix index analysis of binary functions with constant argument which leads to wrong query results. This fixes [#18364](https://github.com/ClickHouse/ClickHouse/issues/18364). [#18373](https://github.com/ClickHouse/ClickHouse/pull/18373) ([Amos Bird](https://github.com/amosbird)).
+* Fix starting the server with tables having default expressions containing dictGet(). Allow getting return type of dictGet() without loading dictionary. [#19805](https://github.com/ClickHouse/ClickHouse/pull/19805) ([Vitaly Baranov](https://github.com/vitlibar)).
+* Fix server crash after query with `if` function with `Tuple` type of then/else branches result. `Tuple` type must contain `Array` or another complex type. Fixes [#18356](https://github.com/ClickHouse/ClickHouse/issues/18356). [#20133](https://github.com/ClickHouse/ClickHouse/pull/20133) ([alesapin](https://github.com/alesapin)).
+* `MaterializeMySQL` (experimental feature): Fix replication for statements that update several tables. [#20066](https://github.com/ClickHouse/ClickHouse/pull/20066) ([Håvard Kvålen](https://github.com/havardk)).
+* Prevent "Connection refused" in docker during initialization script execution. [#20012](https://github.com/ClickHouse/ClickHouse/pull/20012) ([filimonov](https://github.com/filimonov)).
+* `EmbeddedRocksDB` is an experimental storage. Fix the issue with lack of proper type checking. Simplified code. This closes [#19967](https://github.com/ClickHouse/ClickHouse/issues/19967). [#19972](https://github.com/ClickHouse/ClickHouse/pull/19972) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix a segfault in function `fromModifiedJulianDay` when the argument type is `Nullable(T)` for any integral types other than Int32. [#19959](https://github.com/ClickHouse/ClickHouse/pull/19959) ([PHO](https://github.com/depressed-pho)).
+* The function `greatCircleAngle` returned inaccurate results in previous versions. This closes [#19769](https://github.com/ClickHouse/ClickHouse/issues/19769). [#19789](https://github.com/ClickHouse/ClickHouse/pull/19789) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix rare bug when some replicated operations (like mutation) cannot process some parts after data corruption. Fixes [#19593](https://github.com/ClickHouse/ClickHouse/issues/19593). [#19702](https://github.com/ClickHouse/ClickHouse/pull/19702) ([alesapin](https://github.com/alesapin)).
+* Background thread which executes `ON CLUSTER` queries might hang waiting for dropped replicated table to do something. It's fixed. [#19684](https://github.com/ClickHouse/ClickHouse/pull/19684) ([yiguolei](https://github.com/yiguolei)).
+* Fix wrong deserialization of columns description. It makes INSERT into a table with a column named `\` impossible. [#19479](https://github.com/ClickHouse/ClickHouse/pull/19479) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Mark distributed batch as broken in case of empty data block in one of files. [#19449](https://github.com/ClickHouse/ClickHouse/pull/19449) ([Azat Khuzhin](https://github.com/azat)).
+* Fixed very rare bug that might cause mutation to hang after `DROP/DETACH/REPLACE/MOVE PARTITION`. It was partially fixed by [#15537](https://github.com/ClickHouse/ClickHouse/issues/15537) for the most cases. [#19443](https://github.com/ClickHouse/ClickHouse/pull/19443) ([tavplubix](https://github.com/tavplubix)).
+* Fix possible error `Extremes transform was already added to pipeline`. Fixes [#14100](https://github.com/ClickHouse/ClickHouse/issues/14100). [#19430](https://github.com/ClickHouse/ClickHouse/pull/19430) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Fix default value in join types with non-zero default (e.g. some Enums). Closes [#18197](https://github.com/ClickHouse/ClickHouse/issues/18197). [#19360](https://github.com/ClickHouse/ClickHouse/pull/19360) ([vdimir](https://github.com/vdimir)).
+* Do not mark file for distributed send as broken on EOF. [#19290](https://github.com/ClickHouse/ClickHouse/pull/19290) ([Azat Khuzhin](https://github.com/azat)).
+* Fix leaking of pipe fd for `async_socket_for_remote`. [#19153](https://github.com/ClickHouse/ClickHouse/pull/19153) ([Azat Khuzhin](https://github.com/azat)).
+* Fix infinite reading from file in `ORC` format (was introduced in [#10580](https://github.com/ClickHouse/ClickHouse/issues/10580)). Fixes [#19095](https://github.com/ClickHouse/ClickHouse/issues/19095). [#19134](https://github.com/ClickHouse/ClickHouse/pull/19134) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Fix issue in merge tree data writer which can lead to marks with bigger size than fixed granularity size. Fixes [#18913](https://github.com/ClickHouse/ClickHouse/issues/18913). [#19123](https://github.com/ClickHouse/ClickHouse/pull/19123) ([alesapin](https://github.com/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](https://github.com/ClickHouse/ClickHouse/issues/18340). [#19101](https://github.com/ClickHouse/ClickHouse/pull/19101) ([alesapin](https://github.com/alesapin)).
+* Simplify the implementation of `tupleHammingDistance`. Support for tuples of any equal length. Fixes [#19029](https://github.com/ClickHouse/ClickHouse/issues/19029). [#19084](https://github.com/ClickHouse/ClickHouse/pull/19084) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Make sure `groupUniqArray` returns correct type for argument of Enum type. This closes [#17875](https://github.com/ClickHouse/ClickHouse/issues/17875). [#19019](https://github.com/ClickHouse/ClickHouse/pull/19019) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix possible error `Expected single dictionary argument for function` if use function `ignore` with `LowCardinality` argument. Fixes [#14275](https://github.com/ClickHouse/ClickHouse/issues/14275). [#19016](https://github.com/ClickHouse/ClickHouse/pull/19016) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Fix inserting of `LowCardinality` column to table with `TinyLog` engine. Fixes [#18629](https://github.com/ClickHouse/ClickHouse/issues/18629). [#19010](https://github.com/ClickHouse/ClickHouse/pull/19010) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Fix minor issue in JOIN: Join tries to materialize const columns, but our code waits for them in other places. [#18982](https://github.com/ClickHouse/ClickHouse/pull/18982) ([Nikita Mikhaylov](https://github.com/nikitamikhaylov)).
+* Disable `optimize_move_functions_out_of_any` because optimization is not always correct. This closes [#18051](https://github.com/ClickHouse/ClickHouse/issues/18051). This closes [#18973](https://github.com/ClickHouse/ClickHouse/issues/18973). [#18981](https://github.com/ClickHouse/ClickHouse/pull/18981) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Fix possible exception `QueryPipeline stream: different number of columns` caused by merging of query plan's `Expression` steps. Fixes [#18190](https://github.com/ClickHouse/ClickHouse/issues/18190). [#18980](https://github.com/ClickHouse/ClickHouse/pull/18980) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Fixed very rare deadlock at shutdown. [#18977](https://github.com/ClickHouse/ClickHouse/pull/18977) ([tavplubix](https://github.com/tavplubix)).
+* Fixed rare crashes when server run out of memory. [#18976](https://github.com/ClickHouse/ClickHouse/pull/18976) ([tavplubix](https://github.com/tavplubix)).
+* Fix incorrect behavior when `ALTER TABLE ... DROP PART 'part_name'` query removes all deduplication blocks for the whole partition. Fixes [#18874](https://github.com/ClickHouse/ClickHouse/issues/18874). [#18969](https://github.com/ClickHouse/ClickHouse/pull/18969) ([alesapin](https://github.com/alesapin)).
+* Fixed issue [#18894](https://github.com/ClickHouse/ClickHouse/issues/18894) Add a check to avoid exception when long column alias('table.column' style, usually auto-generated by BI tools like Looker) equals to long table name. [#18968](https://github.com/ClickHouse/ClickHouse/pull/18968) ([Daniel Qin](https://github.com/mathfool)).
+* Fix error `Task was not found in task queue` (possible only for remote queries, with `async_socket_for_remote = 1`). [#18964](https://github.com/ClickHouse/ClickHouse/pull/18964) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).
+* Fix bug when mutation with some escaped text (like `ALTER ... UPDATE e = CAST('foo', 'Enum8(\'foo\' = 1')` serialized incorrectly. Fixes [#18878](https://github.com/ClickHouse/ClickHouse/issues/18878). [#18944](https://github.com/ClickHouse/ClickHouse/pull/18944) ([alesapin](https://github.com/alesapin)).
+* ATTACH PARTITION will reset mutations. [#18804](https://github.com/ClickHouse/ClickHouse/issues/18804). [#18935](https://github.com/ClickHouse/ClickHouse/pull/18935) ([fastio](https://github.com/fastio)).
+* Fix issue with `bitmapOrCardinality` that may lead to nullptr dereference. This closes [#18911](https://github.com/ClickHouse/ClickHouse/issues/18911). [#18912](https://github.com/ClickHouse/ClickHouse/pull/18912) ([sundyli](https://github.com/sundy-li)).
+* Fixed `Attempt to read after eof` error when trying to `CAST` `NULL` from `Nullable(String)` to `Nullable(Decimal(P, S))`. Now function `CAST` returns `NULL` when it cannot parse decimal from nullable string. Fixes [#7690](https://github.com/ClickHouse/ClickHouse/issues/7690). [#18718](https://github.com/ClickHouse/ClickHouse/pull/18718) ([Winter Zhang](https://github.com/zhang2014)).
+* Fix data type convert issue for MySQL engine. [#18124](https://github.com/ClickHouse/ClickHouse/pull/18124) ([bo zeng](https://github.com/mis98zb)).
+* Fix clickhouse-client abort exception while executing only `select`. [#19790](https://github.com/ClickHouse/ClickHouse/pull/19790) ([taiyang-li](https://github.com/taiyang-li)).
+
+
+#### Build/Testing/Packaging Improvement
+
+* Run [SQLancer](https://twitter.com/RiggerManuel/status/1352345625480884228) (logical SQL fuzzer) in CI. [#19006](https://github.com/ClickHouse/ClickHouse/pull/19006) ([Ilya Yatsishin](https://github.com/qoega)).
+* Query Fuzzer will fuzz newly added tests more extensively. This closes [#18916](https://github.com/ClickHouse/ClickHouse/issues/18916). [#19185](https://github.com/ClickHouse/ClickHouse/pull/19185) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Integrate with [Big List of Naughty Strings](https://github.com/minimaxir/big-list-of-naughty-strings/) for better fuzzing. [#19480](https://github.com/ClickHouse/ClickHouse/pull/19480) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Add integration tests run with MSan. [#18974](https://github.com/ClickHouse/ClickHouse/pull/18974) ([alesapin](https://github.com/alesapin)).
+* Fixed MemorySanitizer errors in cyrus-sasl and musl. [#19821](https://github.com/ClickHouse/ClickHouse/pull/19821) ([Ilya Yatsishin](https://github.com/qoega)).
+* Insuffiient arguments check in `positionCaseInsensitiveUTF8` function triggered address sanitizer. [#19720](https://github.com/ClickHouse/ClickHouse/pull/19720) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Remove --project-directory for docker-compose in integration test. Fix logs formatting from docker container. [#19706](https://github.com/ClickHouse/ClickHouse/pull/19706) ([Ilya Yatsishin](https://github.com/qoega)).
+* Made generation of macros.xml easier for integration tests. No more excessive logging from dicttoxml. dicttoxml project is not active for 5+ years. [#19697](https://github.com/ClickHouse/ClickHouse/pull/19697) ([Ilya Yatsishin](https://github.com/qoega)).
+* Allow to explicitly enable or disable watchdog via environment variable `CLICKHOUSE_WATCHDOG_ENABLE`. By default it is enabled if server is not attached to terminal. [#19522](https://github.com/ClickHouse/ClickHouse/pull/19522) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Allow building ClickHouse with Kafka support on arm64. [#19369](https://github.com/ClickHouse/ClickHouse/pull/19369) ([filimonov](https://github.com/filimonov)).
+* Allow building librdkafka without ssl. [#19337](https://github.com/ClickHouse/ClickHouse/pull/19337) ([filimonov](https://github.com/filimonov)).
+* Restore Kafka input in FreeBSD builds. [#18924](https://github.com/ClickHouse/ClickHouse/pull/18924) ([Alexandre Snarskii](https://github.com/snar)).
+* Fix potential nullptr dereference in table function `VALUES`. [#19357](https://github.com/ClickHouse/ClickHouse/pull/19357) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+* Avoid UBSan reports in `arrayElement` function, `substring` and `arraySum`. Fixes [#19305](https://github.com/ClickHouse/ClickHouse/issues/19305). Fixes [#19287](https://github.com/ClickHouse/ClickHouse/issues/19287). This closes [#19336](https://github.com/ClickHouse/ClickHouse/issues/19336). [#19347](https://github.com/ClickHouse/ClickHouse/pull/19347) ([alexey-milovidov](https://github.com/alexey-milovidov)).
+
+
## ClickHouse release 21.1
### ClickHouse release v21.1.3.32-stable, 2021-02-03
diff --git a/README.md b/README.md
index 8e114d5abe9..53778c79bef 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ ClickHouse® is an open-source column-oriented database management system that a
* [Tutorial](https://clickhouse.tech/docs/en/getting_started/tutorial/) shows how to set up and query small ClickHouse cluster.
* [Documentation](https://clickhouse.tech/docs/en/) provides more in-depth information.
* [YouTube channel](https://www.youtube.com/c/ClickHouseDB) has a lot of content about ClickHouse in video format.
-* [Slack](https://join.slack.com/t/clickhousedb/shared_invite/zt-d2zxkf9e-XyxDa_ucfPxzuH4SJIm~Ng) and [Telegram](https://telegram.me/clickhouse_en) allow to chat with ClickHouse users in real-time.
+* [Slack](https://join.slack.com/t/clickhousedb/shared_invite/zt-ly9m4w1x-6j7x5Ts_pQZqrctAbRZ3cg) and [Telegram](https://telegram.me/clickhouse_en) allow to chat with ClickHouse users in real-time.
* [Blog](https://clickhouse.yandex/blog/en/) contains various ClickHouse-related articles, as well as announcements and reports about events.
* [Code Browser](https://clickhouse.tech/codebrowser/html_report/ClickHouse/index.html) with syntax highlight and navigation.
* [Yandex.Messenger channel](https://yandex.ru/chat/#/join/20e380d9-c7be-4123-ab06-e95fb946975e) shares announcements and useful links in Russian.
diff --git a/contrib/base64-cmake/CMakeLists.txt b/contrib/base64-cmake/CMakeLists.txt
index 63b4e324d29..a295ee45b84 100644
--- a/contrib/base64-cmake/CMakeLists.txt
+++ b/contrib/base64-cmake/CMakeLists.txt
@@ -11,7 +11,7 @@ endif ()
target_compile_options(base64_scalar PRIVATE -falign-loops)
if (ARCH_AMD64)
- target_compile_options(base64_ssse3 PRIVATE -mssse3 -falign-loops)
+ target_compile_options(base64_ssse3 PRIVATE -mno-avx -mno-avx2 -mssse3 -falign-loops)
target_compile_options(base64_avx PRIVATE -falign-loops -mavx)
target_compile_options(base64_avx2 PRIVATE -falign-loops -mavx2)
else ()
diff --git a/contrib/hyperscan-cmake/CMakeLists.txt b/contrib/hyperscan-cmake/CMakeLists.txt
index c44214cded8..75c45ff7bf5 100644
--- a/contrib/hyperscan-cmake/CMakeLists.txt
+++ b/contrib/hyperscan-cmake/CMakeLists.txt
@@ -252,6 +252,7 @@ if (NOT EXTERNAL_HYPERSCAN_LIBRARY_FOUND)
target_compile_definitions (hyperscan PUBLIC USE_HYPERSCAN=1)
target_compile_options (hyperscan
PRIVATE -g0 # Library has too much debug information
+ -mno-avx -mno-avx2 # The library is using dynamic dispatch and is confused if AVX is enabled globally
-march=corei7 -O2 -fno-strict-aliasing -fno-omit-frame-pointer -fvisibility=hidden # The options from original build system
-fno-sanitize=undefined # Assume the library takes care of itself
)
diff --git a/contrib/poco b/contrib/poco
index e11f3c97157..fbaaba4a02e 160000
--- a/contrib/poco
+++ b/contrib/poco
@@ -1 +1 @@
-Subproject commit e11f3c971570cf6a31006cd21cadf41a259c360a
+Subproject commit fbaaba4a02e29987b8c584747a496c79528f125f
diff --git a/docker/test/fasttest/run.sh b/docker/test/fasttest/run.sh
index 17cec7ae286..bb29959acd2 100755
--- a/docker/test/fasttest/run.sh
+++ b/docker/test/fasttest/run.sh
@@ -319,6 +319,7 @@ function run_tests
# In fasttest, ENABLE_LIBRARIES=0, so rocksdb engine is not enabled by default
01504_rocksdb
+ 01686_rocksdb
# Look at DistributedFilesToInsert, so cannot run in parallel.
01460_DistributedFilesToInsert
diff --git a/docker/test/integration/runner/Dockerfile b/docker/test/integration/runner/Dockerfile
index f353931f0a0..502dc3736b2 100644
--- a/docker/test/integration/runner/Dockerfile
+++ b/docker/test/integration/runner/Dockerfile
@@ -61,7 +61,7 @@ RUN python3 -m pip install \
aerospike \
avro \
cassandra-driver \
- confluent-kafka \
+ confluent-kafka==1.5.0 \
dict2xml \
dicttoxml \
docker \
diff --git a/docs/en/introduction/adopters.md b/docs/en/introduction/adopters.md
index ca16119f460..c7230f2f080 100644
--- a/docs/en/introduction/adopters.md
+++ b/docs/en/introduction/adopters.md
@@ -74,6 +74,7 @@ toc_title: Adopters
| NOC Project | Network Monitoring | Analytics | Main Product | — | [Official Website](https://getnoc.com/features/big-data/) |
| Nuna Inc. | Health Data Analytics | — | — | — | [Talk in English, July 2020](https://youtu.be/GMiXCMFDMow?t=170) |
| OneAPM | Monitorings and Data Analysis | Main product | — | — | [Slides in Chinese, October 2018](https://github.com/ClickHouse/clickhouse-presentations/blob/master/meetup19/8.%20clickhouse在OneAPM的应用%20杜龙.pdf) |
+| Panelbear | Analytics | Monitoring and Analytics | — | — | [Tech Stack, November 2020](https://panelbear.com/blog/tech-stack/) |
| Percent 百分点 | Analytics | Main Product | — | — | [Slides in Chinese, June 2019](https://github.com/ClickHouse/clickhouse-presentations/blob/master/meetup24/4.%20ClickHouse万亿数据双中心的设计与实践%20.pdf) |
| Percona | Performance analysis | Percona Monitoring and Management | — | — | [Official website, Mar 2020](https://www.percona.com/blog/2020/03/30/advanced-query-analysis-in-percona-monitoring-and-management-with-direct-clickhouse-access/) |
| Plausible | Analytics | Main Product | — | — | [Blog post, June 2020](https://twitter.com/PlausibleHQ/status/1273889629087969280) |
diff --git a/docs/en/sql-reference/data-types/array.md b/docs/en/sql-reference/data-types/array.md
index 48957498d63..41e35aaa96f 100644
--- a/docs/en/sql-reference/data-types/array.md
+++ b/docs/en/sql-reference/data-types/array.md
@@ -45,6 +45,8 @@ SELECT [1, 2] AS x, toTypeName(x)
## Working with Data Types {#working-with-data-types}
+The maximum size of an array is limited to one million elements.
+
When creating an array on the fly, ClickHouse automatically defines the argument type as the narrowest data type that can store all the listed arguments. If there are any [Nullable](../../sql-reference/data-types/nullable.md#data_type-nullable) or literal [NULL](../../sql-reference/syntax.md#null-literal) values, the type of an array element also becomes [Nullable](../../sql-reference/data-types/nullable.md).
If ClickHouse couldn’t determine the data type, it generates an exception. For instance, this happens when trying to create an array with strings and numbers simultaneously (`SELECT array(1, 'a')`).
diff --git a/docs/en/sql-reference/functions/array-functions.md b/docs/en/sql-reference/functions/array-functions.md
index dc7727bdfd8..d5b357795d7 100644
--- a/docs/en/sql-reference/functions/array-functions.md
+++ b/docs/en/sql-reference/functions/array-functions.md
@@ -1288,73 +1288,226 @@ Returns the index of the first element in the `arr1` array for which `func` retu
Note that the `arrayFirstIndex` is a [higher-order function](../../sql-reference/functions/index.md#higher-order-functions). You must pass a lambda function to it as the first argument, and it can’t be omitted.
-## arrayMin(\[func,\] arr1, …) {#array-min}
+## arrayMin {#array-min}
-Returns the min of the `func` values. If the function is omitted, it just returns the min of the array elements.
+Returns the minimum of elements in the source array.
+
+If the `func` function is specified, returns the mininum of elements converted by this function.
Note that the `arrayMin` is a [higher-order function](../../sql-reference/functions/index.md#higher-order-functions). You can pass a lambda function to it as the first argument.
-Examples:
+**Syntax**
+
```sql
-SELECT arrayMin([1, 2, 4]) AS res
+arrayMin([func,] arr)
+```
+
+**Parameters**
+
+- `func` — Function. [Expression](../../sql-reference/data-types/special-data-types/expression.md).
+- `arr` — Array. [Array](../../sql-reference/data-types/array.md).
+
+**Returned value**
+
+- The minimum of function values (or the array minimum).
+
+Type: if `func` is specified, matches `func` return value type, else matches the array elements type.
+
+**Examples**
+
+Query:
+
+```sql
+SELECT arrayMin([1, 2, 4]) AS res;
+```
+
+Result:
+
+```text
┌─res─┐
│ 1 │
└─────┘
+```
+Query:
-SELECT arrayMin(x -> (-x), [1, 2, 4]) AS res
+```sql
+SELECT arrayMin(x -> (-x), [1, 2, 4]) AS res;
+```
+
+Result:
+
+```text
┌─res─┐
│ -4 │
└─────┘
```
-## arrayMax(\[func,\] arr1, …) {#array-max}
+## arrayMax {#array-max}
-Returns the max of the `func` values. If the function is omitted, it just returns the max of the array elements.
+Returns the maximum of elements in the source array.
+
+If the `func` function is specified, returns the maximum of elements converted by this function.
Note that the `arrayMax` is a [higher-order function](../../sql-reference/functions/index.md#higher-order-functions). You can pass a lambda function to it as the first argument.
-Examples:
+**Syntax**
+
```sql
-SELECT arrayMax([1, 2, 4]) AS res
+arrayMax([func,] arr)
+```
+
+**Parameters**
+
+- `func` — Function. [Expression](../../sql-reference/data-types/special-data-types/expression.md).
+- `arr` — Array. [Array](../../sql-reference/data-types/array.md).
+
+**Returned value**
+
+- The maximum of function values (or the array maximum).
+
+Type: if `func` is specified, matches `func` return value type, else matches the array elements type.
+
+**Examples**
+
+Query:
+
+```sql
+SELECT arrayMax([1, 2, 4]) AS res;
+```
+
+Result:
+
+```text
┌─res─┐
│ 4 │
└─────┘
+```
+Query:
-SELECT arrayMax(x -> (-x), [1, 2, 4]) AS res
+```sql
+SELECT arrayMax(x -> (-x), [1, 2, 4]) AS res;
+```
+
+Result:
+
+```text
┌─res─┐
│ -1 │
└─────┘
```
-## arraySum(\[func,\] arr1, …) {#array-sum}
+## arraySum {#array-sum}
-Returns the sum of the `func` values. If the function is omitted, it just returns the sum of the array elements.
+Returns the sum of elements in the source array.
+
+If the `func` function is specified, returns the sum of elements converted by this function.
Note that the `arraySum` is a [higher-order function](../../sql-reference/functions/index.md#higher-order-functions). You can pass a lambda function to it as the first argument.
-Examples:
+**Syntax**
+
```sql
-SELECT arraySum([2,3]) AS res
+arraySum([func,] arr)
+```
+
+**Parameters**
+
+- `func` — Function. [Expression](../../sql-reference/data-types/special-data-types/expression.md).
+- `arr` — Array. [Array](../../sql-reference/data-types/array.md).
+
+**Returned value**
+
+- The sum of the function values (or the array sum).
+
+Type: for decimal numbers in source array (or for converted values, if `func` is specified) — [Decimal128](../../sql-reference/data-types/decimal.md), for floating point numbers — [Float64](../../sql-reference/data-types/float.md), for numeric unsigned — [UInt64](../../sql-reference/data-types/int-uint.md), and for numeric signed — [Int64](../../sql-reference/data-types/int-uint.md).
+
+**Examples**
+
+Query:
+
+```sql
+SELECT arraySum([2, 3]) AS res;
+```
+
+Result:
+
+```text
┌─res─┐
│ 5 │
└─────┘
+```
+Query:
-SELECT arraySum(x -> x*x, [2, 3]) AS res
+```sql
+SELECT arraySum(x -> x*x, [2, 3]) AS res;
+```
+
+Result:
+
+```text
┌─res─┐
│ 13 │
└─────┘
```
+## arrayAvg {#array-avg}
-## arrayAvg(\[func,\] arr1, …) {#array-avg}
+Returns the average of elements in the source array.
-Returns the average of the `func` values. If the function is omitted, it just returns the average of the array elements.
+If the `func` function is specified, returns the average of elements converted by this function.
Note that the `arrayAvg` is a [higher-order function](../../sql-reference/functions/index.md#higher-order-functions). You can pass a lambda function to it as the first argument.
+**Syntax**
+
+```sql
+arrayAvg([func,] arr)
+```
+
+**Parameters**
+
+- `func` — Function. [Expression](../../sql-reference/data-types/special-data-types/expression.md).
+- `arr` — Array. [Array](../../sql-reference/data-types/array.md).
+
+**Returned value**
+
+- The average of function values (or the array average).
+
+Type: [Float64](../../sql-reference/data-types/float.md).
+
+**Examples**
+
+Query:
+
+```sql
+SELECT arrayAvg([1, 2, 4]) AS res;
+```
+
+Result:
+
+```text
+┌────────────────res─┐
+│ 2.3333333333333335 │
+└────────────────────┘
+```
+
+Query:
+
+```sql
+SELECT arrayAvg(x -> (x * x), [2, 4]) AS res;
+```
+
+Result:
+
+```text
+┌─res─┐
+│ 10 │
+└─────┘
+```
+
## arrayCumSum(\[func,\] arr1, …) {#arraycumsumfunc-arr1}
Returns an array of partial sums of elements in the source array (a running sum). If the `func` function is specified, then the values of the array elements are converted by this function before summing.
diff --git a/docs/en/sql-reference/functions/date-time-functions.md b/docs/en/sql-reference/functions/date-time-functions.md
index 9de780fb596..4a73bdb2546 100644
--- a/docs/en/sql-reference/functions/date-time-functions.md
+++ b/docs/en/sql-reference/functions/date-time-functions.md
@@ -380,7 +380,7 @@ Alias: `dateTrunc`.
**Parameters**
-- `unit` — Part of date. [String](../syntax.md#syntax-string-literal).
+- `unit` — The type of interval to truncate the result. [String Literal](../syntax.md#syntax-string-literal).
Possible values:
- `second`
@@ -435,6 +435,201 @@ Result:
- [toStartOfInterval](#tostartofintervaltime-or-data-interval-x-unit-time-zone)
+## date\_add {#date_add}
+
+Adds specified date/time interval to the provided date.
+
+**Syntax**
+
+``` sql
+date_add(unit, value, date)
+```
+
+Aliases: `dateAdd`, `DATE_ADD`.
+
+**Parameters**
+
+- `unit` — The type of interval to add. [String](../../sql-reference/data-types/string.md).
+
+ Supported values: second, minute, hour, day, week, month, quarter, year.
+- `value` - Value in specified unit - [Int](../../sql-reference/data-types/int-uint.md)
+- `date` — [Date](../../sql-reference/data-types/date.md) or [DateTime](../../sql-reference/data-types/datetime.md).
+
+
+**Returned value**
+
+Returns Date or DateTime with `value` expressed in `unit` added to `date`.
+
+**Example**
+
+```sql
+select date_add(YEAR, 3, toDate('2018-01-01'));
+```
+
+```text
+┌─plus(toDate('2018-01-01'), toIntervalYear(3))─┐
+│ 2021-01-01 │
+└───────────────────────────────────────────────┘
+```
+
+## date\_diff {#date_diff}
+
+Returns the difference between two Date or DateTime values.
+
+**Syntax**
+
+``` sql
+date_diff('unit', startdate, enddate, [timezone])
+```
+
+Aliases: `dateDiff`, `DATE_DIFF`.
+
+**Parameters**
+
+- `unit` — The type of interval for result [String](../../sql-reference/data-types/string.md).
+
+ Supported values: second, minute, hour, day, week, month, quarter, year.
+
+- `startdate` — The first time value to subtract (the subtrahend). [Date](../../sql-reference/data-types/date.md) or [DateTime](../../sql-reference/data-types/datetime.md).
+
+- `enddate` — The second time value to subtract from (the minuend). [Date](../../sql-reference/data-types/date.md) or [DateTime](../../sql-reference/data-types/datetime.md).
+
+- `timezone` — Optional parameter. If specified, it is applied to both `startdate` and `enddate`. If not specified, timezones of `startdate` and `enddate` are used. If they are not the same, the result is unspecified.
+
+**Returned value**
+
+Difference between `enddate` and `startdate` expressed in `unit`.
+
+Type: `int`.
+
+**Example**
+
+Query:
+
+``` sql
+SELECT dateDiff('hour', toDateTime('2018-01-01 22:00:00'), toDateTime('2018-01-02 23:00:00'));
+```
+
+Result:
+
+``` text
+┌─dateDiff('hour', toDateTime('2018-01-01 22:00:00'), toDateTime('2018-01-02 23:00:00'))─┐
+│ 25 │
+└────────────────────────────────────────────────────────────────────────────────────────┘
+```
+
+## date\_sub {#date_sub}
+
+Subtracts a time/date interval from the provided date.
+
+**Syntax**
+
+``` sql
+date_sub(unit, value, date)
+```
+
+Aliases: `dateSub`, `DATE_SUB`.
+
+**Parameters**
+
+- `unit` — The type of interval to subtract. [String](../../sql-reference/data-types/string.md).
+
+ Supported values: second, minute, hour, day, week, month, quarter, year.
+- `value` - Value in specified unit - [Int](../../sql-reference/data-types/int-uint.md)
+- `date` — [Date](../../sql-reference/data-types/date.md) or [DateTime](../../sql-reference/data-types/datetime.md) to subtract value from.
+
+**Returned value**
+
+Returns Date or DateTime with `value` expressed in `unit` subtracted from `date`.
+
+**Example**
+
+Query:
+
+``` sql
+SELECT date_sub(YEAR, 3, toDate('2018-01-01'));
+```
+
+Result:
+
+``` text
+┌─minus(toDate('2018-01-01'), toIntervalYear(3))─┐
+│ 2015-01-01 │
+└────────────────────────────────────────────────┘
+```
+
+## timestamp\_add {#timestamp_add}
+
+Adds the specified time value with the provided date or date time value.
+
+**Syntax**
+
+``` sql
+timestamp_add(date, INTERVAL value unit)
+```
+
+Aliases: `timeStampAdd`, `TIMESTAMP_ADD`.
+
+**Parameters**
+
+- `date` — Date or Date with time - [Date](../../sql-reference/data-types/date.md) or [DateTime](../../sql-reference/data-types/datetime.md).
+- `value` - Value in specified unit - [Int](../../sql-reference/data-types/int-uint.md)
+- `unit` — The type of interval to add. [String](../../sql-reference/data-types/string.md).
+
+ Supported values: second, minute, hour, day, week, month, quarter, year.
+
+**Returned value**
+
+Returns Date or DateTime with the specified `value` expressed in `unit` added to `date`.
+
+**Example**
+
+```sql
+select timestamp_add(toDate('2018-01-01'), INTERVAL 3 MONTH);
+```
+
+```text
+┌─plus(toDate('2018-01-01'), toIntervalMonth(3))─┐
+│ 2018-04-01 │
+└────────────────────────────────────────────────┘
+```
+
+## timestamp\_sub {#timestamp_sub}
+
+Returns the difference between two dates in the specified unit.
+
+**Syntax**
+
+``` sql
+timestamp_sub(unit, value, date)
+```
+
+Aliases: `timeStampSub`, `TIMESTAMP_SUB`.
+
+**Parameters**
+
+- `unit` — The type of interval to add. [String](../../sql-reference/data-types/string.md).
+
+ Supported values: second, minute, hour, day, week, month, quarter, year.
+- `value` - Value in specified unit - [Int](../../sql-reference/data-types/int-uint.md).
+- `date`- [Date](../../sql-reference/data-types/date.md) or [DateTime](../../sql-reference/data-types/datetime.md).
+
+**Returned value**
+
+Difference between `date` and the specified `value` expressed in `unit`.
+
+**Example**
+
+```sql
+select timestamp_sub(MONTH, 5, toDateTime('2018-12-18 01:02:03'));
+```
+
+```text
+┌─minus(toDateTime('2018-12-18 01:02:03'), toIntervalMonth(5))─┐
+│ 2018-07-18 01:02:03 │
+└──────────────────────────────────────────────────────────────┘
+```
+
## now {#now}
Returns the current date and time.
@@ -550,50 +745,6 @@ SELECT
└──────────────────────────┴───────────────────────────────┘
```
-## dateDiff {#datediff}
-
-Returns the difference between two Date or DateTime values.
-
-**Syntax**
-
-``` sql
-dateDiff('unit', startdate, enddate, [timezone])
-```
-
-**Parameters**
-
-- `unit` — Time unit, in which the returned value is expressed. [String](../../sql-reference/syntax.md#syntax-string-literal).
-
- Supported values: second, minute, hour, day, week, month, quarter, year.
-
-- `startdate` — The first time value to compare. [Date](../../sql-reference/data-types/date.md) or [DateTime](../../sql-reference/data-types/datetime.md).
-
-- `enddate` — The second time value to compare. [Date](../../sql-reference/data-types/date.md) or [DateTime](../../sql-reference/data-types/datetime.md).
-
-- `timezone` — Optional parameter. If specified, it is applied to both `startdate` and `enddate`. If not specified, timezones of `startdate` and `enddate` are used. If they are not the same, the result is unspecified.
-
-**Returned value**
-
-Difference between `startdate` and `enddate` expressed in `unit`.
-
-Type: `int`.
-
-**Example**
-
-Query:
-
-``` sql
-SELECT dateDiff('hour', toDateTime('2018-01-01 22:00:00'), toDateTime('2018-01-02 23:00:00'));
-```
-
-Result:
-
-``` text
-┌─dateDiff('hour', toDateTime('2018-01-01 22:00:00'), toDateTime('2018-01-02 23:00:00'))─┐
-│ 25 │
-└────────────────────────────────────────────────────────────────────────────────────────┘
-```
-
## timeSlots(StartTime, Duration,\[, Size\]) {#timeslotsstarttime-duration-size}
For a time interval starting at ‘StartTime’ and continuing for ‘Duration’ seconds, it returns an array of moments in time, consisting of points from this interval rounded down to the ‘Size’ in seconds. ‘Size’ is an optional parameter: a constant UInt32, set to 1800 by default.
diff --git a/docs/en/sql-reference/window-functions/index.md b/docs/en/sql-reference/window-functions/index.md
index a79328ade32..5a6f13226a5 100644
--- a/docs/en/sql-reference/window-functions/index.md
+++ b/docs/en/sql-reference/window-functions/index.md
@@ -1,9 +1,14 @@
-# [development] Window Functions
+---
+toc_priority: 62
+toc_title: Window Functions
+---
+
+# [experimental] Window Functions
!!! warning "Warning"
This is an experimental feature that is currently in development and is not ready
for general use. It will change in unpredictable backwards-incompatible ways in
-the future releases.
+the future releases. Set `allow_experimental_window_functions = 1` to enable it.
ClickHouse currently supports calculation of aggregate functions over a window.
Pure window functions such as `rank`, `lag`, `lead` and so on are not yet supported.
@@ -11,9 +16,7 @@ Pure window functions such as `rank`, `lag`, `lead` and so on are not yet suppor
The window can be specified either with an `OVER` clause or with a separate
`WINDOW` clause.
-Only two variants of frame are supported, `ROWS` and `RANGE`. The only supported
-frame boundaries are `ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW`.
-
+Only two variants of frame are supported, `ROWS` and `RANGE`. Offsets for the `RANGE` frame are not yet supported.
## References
@@ -28,6 +31,7 @@ https://github.com/ClickHouse/ClickHouse/blob/master/tests/performance/window_fu
https://github.com/ClickHouse/ClickHouse/blob/master/tests/queries/0_stateless/01591_window_functions.sql
### Postgres Docs
+https://www.postgresql.org/docs/current/sql-select.html#SQL-WINDOW
https://www.postgresql.org/docs/devel/sql-expressions.html#SYNTAX-WINDOW-FUNCTIONS
https://www.postgresql.org/docs/devel/functions-window.html
https://www.postgresql.org/docs/devel/tutorial-window.html
diff --git a/docs/ru/development/style.md b/docs/ru/development/style.md
index 4d71dca46a7..1b211259bbb 100644
--- a/docs/ru/development/style.md
+++ b/docs/ru/development/style.md
@@ -714,6 +714,7 @@ auto s = std::string{"Hello"};
### Пользовательская ошибка {#error-messages-user-error}
Такая ошибка вызвана действиями пользователя (неверный синтаксис запроса) или конфигурацией внешних систем (кончилось место на диске). Предполагается, что пользователь может устранить её самостоятельно. Для этого в сообщении об ошибке должна содержаться следующая информация:
+
* что произошло. Это должно объясняться в пользовательских терминах (`Function pow() is not supported for data type UInt128`), а не загадочными конструкциями из кода (`runtime overload resolution failed in DB::BinaryOperationBuilder::Impl, UInt128, Int8>::kaboongleFastPath()`).
* почему/где/когда -- любой контекст, который помогает отладить проблему. Представьте, как бы её отлаживали вы (программировать и пользоваться отладчиком нельзя).
* что можно предпринять для устранения ошибки. Здесь можно перечислить типичные причины проблемы, настройки, влияющие на это поведение, и так далее.
diff --git a/docs/ru/sql-reference/data-types/array.md b/docs/ru/sql-reference/data-types/array.md
index 906246b66ee..86a23ed041b 100644
--- a/docs/ru/sql-reference/data-types/array.md
+++ b/docs/ru/sql-reference/data-types/array.md
@@ -47,6 +47,8 @@ SELECT [1, 2] AS x, toTypeName(x)
## Особенности работы с типами данных {#osobennosti-raboty-s-tipami-dannykh}
+Максимальный размер массива ограничен одним миллионом элементов.
+
При создании массива «на лету» ClickHouse автоматически определяет тип аргументов как наиболее узкий тип данных, в котором можно хранить все перечисленные аргументы. Если среди аргументов есть [NULL](../../sql-reference/data-types/array.md#null-literal) или аргумент типа [Nullable](nullable.md#data_type-nullable), то тип элементов массива — [Nullable](nullable.md).
Если ClickHouse не смог подобрать тип данных, то он сгенерирует исключение. Это произойдёт, например, при попытке создать массив одновременно со строками и числами `SELECT array(1, 'a')`.
diff --git a/docs/ru/sql-reference/functions/array-functions.md b/docs/ru/sql-reference/functions/array-functions.md
index 015d14b9de5..80057e6f0e0 100644
--- a/docs/ru/sql-reference/functions/array-functions.md
+++ b/docs/ru/sql-reference/functions/array-functions.md
@@ -1135,11 +1135,225 @@ SELECT
Функция `arrayFirstIndex` является [функцией высшего порядка](../../sql-reference/functions/index.md#higher-order-functions) — в качестве первого аргумента ей нужно передать лямбда-функцию, и этот аргумент не может быть опущен.
-## arraySum(\[func,\] arr1, …) {#array-sum}
+## arrayMin {#array-min}
-Возвращает сумму значений функции `func`. Если функция не указана - просто возвращает сумму элементов массива.
+Возвращает значение минимального элемента в исходном массиве.
-Функция `arraySum` является [функцией высшего порядка](../../sql-reference/functions/index.md#higher-order-functions) - в качестве первого аргумента ей можно передать лямбда-функцию.
+Если передана функция `func`, возвращается минимум из элементов массива, преобразованных этой функцией.
+
+Функция `arrayMin` является [функцией высшего порядка](../../sql-reference/functions/index.md#higher-order-functions) — в качестве первого аргумента ей можно передать лямбда-функцию.
+
+**Синтаксис**
+
+```sql
+arrayMin([func,] arr)
+```
+
+**Параметры**
+
+- `func` — функция. [Expression](../../sql-reference/data-types/special-data-types/expression.md).
+- `arr` — массив. [Array](../../sql-reference/data-types/array.md).
+
+**Возвращаемое значение**
+
+- Минимальное значение функции (или минимальный элемент массива).
+
+Тип: если передана `func`, соответствует типу ее возвращаемого значения, иначе соответствует типу элементов массива.
+
+**Примеры**
+
+Запрос:
+
+```sql
+SELECT arrayMin([1, 2, 4]) AS res;
+```
+
+Результат:
+
+```text
+┌─res─┐
+│ 1 │
+└─────┘
+```
+
+Запрос:
+
+```sql
+SELECT arrayMin(x -> (-x), [1, 2, 4]) AS res;
+```
+
+Результат:
+
+```text
+┌─res─┐
+│ -4 │
+└─────┘
+```
+
+## arrayMax {#array-max}
+
+Возвращает значение максимального элемента в исходном массиве.
+
+Если передана функция `func`, возвращается максимум из элементов массива, преобразованных этой функцией.
+
+Функция `arrayMax` является [функцией высшего порядка](../../sql-reference/functions/index.md#higher-order-functions) — в качестве первого аргумента ей можно передать лямбда-функцию.
+
+**Синтаксис**
+
+```sql
+arrayMax([func,] arr)
+```
+
+**Параметры**
+
+- `func` — функция. [Expression](../../sql-reference/data-types/special-data-types/expression.md).
+- `arr` — массив. [Array](../../sql-reference/data-types/array.md).
+
+**Возвращаемое значение**
+
+- Максимальное значение функции (или максимальный элемент массива).
+
+Тип: если передана `func`, соответствует типу ее возвращаемого значения, иначе соответствует типу элементов массива.
+
+**Примеры**
+
+Запрос:
+
+```sql
+SELECT arrayMax([1, 2, 4]) AS res;
+```
+
+Результат:
+
+```text
+┌─res─┐
+│ 4 │
+└─────┘
+```
+
+Запрос:
+
+```sql
+SELECT arrayMax(x -> (-x), [1, 2, 4]) AS res;
+```
+
+Результат:
+
+```text
+┌─res─┐
+│ -1 │
+└─────┘
+```
+
+## arraySum {#array-sum}
+
+Возвращает сумму элементов в исходном массиве.
+
+Если передана функция `func`, возвращается сумма элементов массива, преобразованных этой функцией.
+
+Функция `arraySum` является [функцией высшего порядка](../../sql-reference/functions/index.md#higher-order-functions) — в качестве первого аргумента ей можно передать лямбда-функцию.
+
+**Синтаксис**
+
+```sql
+arraySum([func,] arr)
+```
+
+**Параметры**
+
+- `func` — функция. [Expression](../../sql-reference/data-types/special-data-types/expression.md).
+- `arr` — массив. [Array](../../sql-reference/data-types/array.md).
+
+**Возвращаемое значение**
+
+- Сумма значений функции (или сумма элементов массива).
+
+Тип: для Decimal чисел в исходном массиве (если функция `func` была передана, то для чисел, преобразованных ею) — [Decimal128](../../sql-reference/data-types/decimal.md), для чисел с плавающей точкой — [Float64](../../sql-reference/data-types/float.md), для беззнаковых целых чисел — [UInt64](../../sql-reference/data-types/int-uint.md), для целых чисел со знаком — [Int64](../../sql-reference/data-types/int-uint.md).
+
+**Примеры**
+
+Запрос:
+
+```sql
+SELECT arraySum([2, 3]) AS res;
+```
+
+Результат:
+
+```text
+┌─res─┐
+│ 5 │
+└─────┘
+```
+
+Запрос:
+
+```sql
+SELECT arraySum(x -> x*x, [2, 3]) AS res;
+```
+
+Результат:
+
+```text
+┌─res─┐
+│ 13 │
+└─────┘
+```
+
+## arrayAvg {#array-avg}
+
+Возвращает среднее значение элементов в исходном массиве.
+
+Если передана функция `func`, возвращается среднее значение элементов массива, преобразованных этой функцией.
+
+Функция `arrayAvg` является [функцией высшего порядка](../../sql-reference/functions/index.md#higher-order-functions) — в качестве первого аргумента ей можно передать лямбда-функцию.
+
+**Синтаксис**
+
+```sql
+arrayAvg([func,] arr)
+```
+
+**Параметры**
+
+- `func` — функция. [Expression](../../sql-reference/data-types/special-data-types/expression.md).
+- `arr` — массив. [Array](../../sql-reference/data-types/array.md).
+
+**Возвращаемое значение**
+
+- Среднее значение функции (или среднее значение элементов массива).
+
+Тип: [Float64](../../sql-reference/data-types/float.md).
+
+**Примеры**
+
+Запрос:
+
+```sql
+SELECT arrayAvg([1, 2, 4]) AS res;
+```
+
+Результат:
+
+```text
+┌────────────────res─┐
+│ 2.3333333333333335 │
+└────────────────────┘
+```
+
+Запрос:
+
+```sql
+SELECT arrayAvg(x -> (x * x), [2, 4]) AS res;
+```
+
+Результат:
+
+```text
+┌─res─┐
+│ 10 │
+└─────┘
+```
## arrayCumSum(\[func,\] arr1, …) {#arraycumsumfunc-arr1}
diff --git a/programs/client/Client.cpp b/programs/client/Client.cpp
index 9a8b580407a..e41f780e99a 100644
--- a/programs/client/Client.cpp
+++ b/programs/client/Client.cpp
@@ -1719,7 +1719,7 @@ private:
}
// Remember where the data ended. We use this info later to determine
// where the next query begins.
- parsed_insert_query->end = data_in.buffer().begin() + data_in.count();
+ parsed_insert_query->end = parsed_insert_query->data + data_in.count();
}
else if (!is_interactive)
{
@@ -1900,6 +1900,9 @@ private:
switch (packet.type)
{
+ case Protocol::Server::PartUUIDs:
+ return true;
+
case Protocol::Server::Data:
if (!cancelled)
onData(packet.block);
diff --git a/programs/client/QueryFuzzer.cpp b/programs/client/QueryFuzzer.cpp
index ae0de450a10..05c20434820 100644
--- a/programs/client/QueryFuzzer.cpp
+++ b/programs/client/QueryFuzzer.cpp
@@ -325,6 +325,51 @@ void QueryFuzzer::fuzzColumnLikeExpressionList(IAST * ast)
// the generic recursion into IAST.children.
}
+void QueryFuzzer::fuzzWindowFrame(WindowFrame & frame)
+{
+ switch (fuzz_rand() % 40)
+ {
+ case 0:
+ {
+ const auto r = fuzz_rand() % 3;
+ frame.type = r == 0 ? WindowFrame::FrameType::Rows
+ : r == 1 ? WindowFrame::FrameType::Range
+ : WindowFrame::FrameType::Groups;
+ break;
+ }
+ case 1:
+ {
+ const auto r = fuzz_rand() % 3;
+ frame.begin_type = r == 0 ? WindowFrame::BoundaryType::Unbounded
+ : r == 1 ? WindowFrame::BoundaryType::Current
+ : WindowFrame::BoundaryType::Offset;
+ break;
+ }
+ case 2:
+ {
+ const auto r = fuzz_rand() % 3;
+ frame.end_type = r == 0 ? WindowFrame::BoundaryType::Unbounded
+ : r == 1 ? WindowFrame::BoundaryType::Current
+ : WindowFrame::BoundaryType::Offset;
+ break;
+ }
+ case 3:
+ {
+ frame.begin_offset = getRandomField(0).get();
+ break;
+ }
+ case 4:
+ {
+ frame.end_offset = getRandomField(0).get();
+ break;
+ }
+ default:
+ break;
+ }
+
+ frame.is_default = (frame == WindowFrame{});
+}
+
void QueryFuzzer::fuzz(ASTs & asts)
{
for (auto & ast : asts)
@@ -409,6 +454,7 @@ void QueryFuzzer::fuzz(ASTPtr & ast)
auto & def = fn->window_definition->as();
fuzzColumnLikeExpressionList(def.partition_by.get());
fuzzOrderByList(def.order_by.get());
+ fuzzWindowFrame(def.frame);
}
fuzz(fn->children);
@@ -421,6 +467,23 @@ void QueryFuzzer::fuzz(ASTPtr & ast)
fuzz(select->children);
}
+ /*
+ * The time to fuzz the settings has not yet come.
+ * Apparently we don't have any infractructure to validate the values of
+ * the settings, and the first query with max_block_size = -1 breaks
+ * because of overflows here and there.
+ *//*
+ * else if (auto * set = typeid_cast(ast.get()))
+ * {
+ * for (auto & c : set->changes)
+ * {
+ * if (fuzz_rand() % 50 == 0)
+ * {
+ * c.value = fuzzField(c.value);
+ * }
+ * }
+ * }
+ */
else if (auto * literal = typeid_cast(ast.get()))
{
// There is a caveat with fuzzing the children: many ASTs also keep the
diff --git a/programs/client/QueryFuzzer.h b/programs/client/QueryFuzzer.h
index e9d3f150283..38714205967 100644
--- a/programs/client/QueryFuzzer.h
+++ b/programs/client/QueryFuzzer.h
@@ -14,6 +14,7 @@ namespace DB
class ASTExpressionList;
class ASTOrderByElement;
+struct WindowFrame;
/*
* This is an AST-based query fuzzer that makes random modifications to query
@@ -65,6 +66,7 @@ struct QueryFuzzer
void fuzzOrderByElement(ASTOrderByElement * elem);
void fuzzOrderByList(IAST * ast);
void fuzzColumnLikeExpressionList(IAST * ast);
+ void fuzzWindowFrame(WindowFrame & frame);
void fuzz(ASTs & asts);
void fuzz(ASTPtr & ast);
void collectFuzzInfoMain(const ASTPtr ast);
diff --git a/src/Client/Connection.cpp b/src/Client/Connection.cpp
index 65b15a46955..e38a6b240a6 100644
--- a/src/Client/Connection.cpp
+++ b/src/Client/Connection.cpp
@@ -542,6 +542,12 @@ void Connection::sendData(const Block & block, const String & name, bool scalar)
throttler->add(out->count() - prev_bytes);
}
+void Connection::sendIgnoredPartUUIDs(const std::vector & uuids)
+{
+ writeVarUInt(Protocol::Client::IgnoredPartUUIDs, *out);
+ writeVectorBinary(uuids, *out);
+ out->next();
+}
void Connection::sendPreparedData(ReadBuffer & input, size_t size, const String & name)
{
@@ -798,6 +804,10 @@ Packet Connection::receivePacket(std::function async_
case Protocol::Server::EndOfStream:
return res;
+ case Protocol::Server::PartUUIDs:
+ readVectorBinary(res.part_uuids, *in);
+ return res;
+
default:
/// In unknown state, disconnect - to not leave unsynchronised connection.
disconnect();
diff --git a/src/Client/Connection.h b/src/Client/Connection.h
index 83e8f3ba206..2d24b143d7a 100644
--- a/src/Client/Connection.h
+++ b/src/Client/Connection.h
@@ -66,6 +66,7 @@ struct Packet
std::vector multistring_message;
Progress progress;
BlockStreamProfileInfo profile_info;
+ std::vector part_uuids;
Packet() : type(Protocol::Server::Hello) {}
};
@@ -157,6 +158,8 @@ public:
void sendScalarsData(Scalars & data);
/// Send all contents of external (temporary) tables.
void sendExternalTablesData(ExternalTablesData & data);
+ /// Send parts' uuids to excluded them from query processing
+ void sendIgnoredPartUUIDs(const std::vector & uuids);
/// Send prepared block of data (serialized and, if need, compressed), that will be read from 'input'.
/// You could pass size of serialized/compressed block.
diff --git a/src/Client/MultiplexedConnections.cpp b/src/Client/MultiplexedConnections.cpp
index ed7aad0a515..c50dd7b6454 100644
--- a/src/Client/MultiplexedConnections.cpp
+++ b/src/Client/MultiplexedConnections.cpp
@@ -140,6 +140,21 @@ void MultiplexedConnections::sendQuery(
sent_query = true;
}
+void MultiplexedConnections::sendIgnoredPartUUIDs(const std::vector & uuids)
+{
+ std::lock_guard lock(cancel_mutex);
+
+ if (sent_query)
+ throw Exception("Cannot send uuids after query is sent.", ErrorCodes::LOGICAL_ERROR);
+
+ for (ReplicaState & state : replica_states)
+ {
+ Connection * connection = state.connection;
+ if (connection != nullptr)
+ connection->sendIgnoredPartUUIDs(uuids);
+ }
+}
+
Packet MultiplexedConnections::receivePacket()
{
std::lock_guard lock(cancel_mutex);
@@ -195,6 +210,7 @@ Packet MultiplexedConnections::drain()
switch (packet.type)
{
+ case Protocol::Server::PartUUIDs:
case Protocol::Server::Data:
case Protocol::Server::Progress:
case Protocol::Server::ProfileInfo:
@@ -253,6 +269,7 @@ Packet MultiplexedConnections::receivePacketUnlocked(std::function & uuids);
+
/** On each replica, read and skip all packets to EndOfStream or Exception.
* Returns EndOfStream if no exception has been received. Otherwise
* returns the last received packet of type Exception.
diff --git a/src/Columns/ColumnsNumber.h b/src/Columns/ColumnsNumber.h
index 96ce2bd6d6f..17a28e617c3 100644
--- a/src/Columns/ColumnsNumber.h
+++ b/src/Columns/ColumnsNumber.h
@@ -26,4 +26,6 @@ using ColumnInt256 = ColumnVector;
using ColumnFloat32 = ColumnVector;
using ColumnFloat64 = ColumnVector;
+using ColumnUUID = ColumnVector;
+
}
diff --git a/src/Common/ErrorCodes.cpp b/src/Common/ErrorCodes.cpp
index a2cd65137c0..09e5945f2b5 100644
--- a/src/Common/ErrorCodes.cpp
+++ b/src/Common/ErrorCodes.cpp
@@ -533,6 +533,7 @@
M(564, INTERSERVER_SCHEME_DOESNT_MATCH) \
M(565, TOO_MANY_PARTITIONS) \
M(566, CANNOT_RMDIR) \
+ M(567, DUPLICATED_PART_UUIDS) \
\
M(999, KEEPER_EXCEPTION) \
M(1000, POCO_EXCEPTION) \
diff --git a/src/Common/StackTrace.h b/src/Common/StackTrace.h
index 3ae4b964838..b2e14a01f03 100644
--- a/src/Common/StackTrace.h
+++ b/src/Common/StackTrace.h
@@ -34,7 +34,15 @@ public:
std::optional file;
std::optional line;
};
- static constexpr size_t capacity = 32;
+
+ static constexpr size_t capacity =
+#ifndef NDEBUG
+ /* The stacks are normally larger in debug version due to less inlining. */
+ 64
+#else
+ 32
+#endif
+ ;
using FramePointers = std::array;
using Frames = std::array;
diff --git a/src/Common/ThreadProfileEvents.cpp b/src/Common/ThreadProfileEvents.cpp
index e6336baecda..327178c92ff 100644
--- a/src/Common/ThreadProfileEvents.cpp
+++ b/src/Common/ThreadProfileEvents.cpp
@@ -68,7 +68,7 @@ TasksStatsCounters::TasksStatsCounters(const UInt64 tid, const MetricsProvider p
case MetricsProvider::Netlink:
stats_getter = [metrics_provider = std::make_shared(), tid]()
{
- ::taskstats result;
+ ::taskstats result{};
metrics_provider->getStat(result, tid);
return result;
};
@@ -76,7 +76,7 @@ TasksStatsCounters::TasksStatsCounters(const UInt64 tid, const MetricsProvider p
case MetricsProvider::Procfs:
stats_getter = [metrics_provider = std::make_shared(tid)]()
{
- ::taskstats result;
+ ::taskstats result{};
metrics_provider->getTaskStats(result);
return result;
};
diff --git a/src/Core/MySQL/MySQLReplication.cpp b/src/Core/MySQL/MySQLReplication.cpp
index b86d6447e26..8fdf337c849 100644
--- a/src/Core/MySQL/MySQLReplication.cpp
+++ b/src/Core/MySQL/MySQLReplication.cpp
@@ -136,6 +136,7 @@ namespace MySQLReplication
out << "XID: " << this->xid << '\n';
}
+ /// https://dev.mysql.com/doc/internals/en/table-map-event.html
void TableMapEvent::parseImpl(ReadBuffer & payload)
{
payload.readStrict(reinterpret_cast(&table_id), 6);
@@ -257,15 +258,19 @@ namespace MySQLReplication
out << "Null Bitmap: " << bitmap_str << '\n';
}
- void RowsEvent::parseImpl(ReadBuffer & payload)
+ void RowsEventHeader::parse(ReadBuffer & payload)
{
payload.readStrict(reinterpret_cast(&table_id), 6);
payload.readStrict(reinterpret_cast(&flags), 2);
+ UInt16 extra_data_len;
/// This extra_data_len contains the 2 bytes length.
payload.readStrict(reinterpret_cast(&extra_data_len), 2);
payload.ignore(extra_data_len - 2);
+ }
+ void RowsEvent::parseImpl(ReadBuffer & payload)
+ {
number_columns = readLengthEncodedNumber(payload);
size_t columns_bitmap_size = (number_columns + 7) / 8;
switch (header.type)
@@ -795,37 +800,50 @@ namespace MySQLReplication
{
event = std::make_shared(std::move(event_header));
event->parseEvent(event_payload);
- table_map = std::static_pointer_cast(event);
+ auto table_map = std::static_pointer_cast(event);
+ table_maps[table_map->table_id] = table_map;
break;
}
case WRITE_ROWS_EVENT_V1:
case WRITE_ROWS_EVENT_V2: {
- if (doReplicate())
- event = std::make_shared(table_map, std::move(event_header));
+ RowsEventHeader rows_header(event_header.type);
+ rows_header.parse(event_payload);
+ if (doReplicate(rows_header.table_id))
+ event = std::make_shared(table_maps.at(rows_header.table_id), std::move(event_header), rows_header);
else
event = std::make_shared(std::move(event_header));
event->parseEvent(event_payload);
+ if (rows_header.flags & ROWS_END_OF_STATEMENT)
+ table_maps.clear();
break;
}
case DELETE_ROWS_EVENT_V1:
case DELETE_ROWS_EVENT_V2: {
- if (doReplicate())
- event = std::make_shared(table_map, std::move(event_header));
+ RowsEventHeader rows_header(event_header.type);
+ rows_header.parse(event_payload);
+ if (doReplicate(rows_header.table_id))
+ event = std::make_shared(table_maps.at(rows_header.table_id), std::move(event_header), rows_header);
else
event = std::make_shared(std::move(event_header));
event->parseEvent(event_payload);
+ if (rows_header.flags & ROWS_END_OF_STATEMENT)
+ table_maps.clear();
break;
}
case UPDATE_ROWS_EVENT_V1:
case UPDATE_ROWS_EVENT_V2: {
- if (doReplicate())
- event = std::make_shared(table_map, std::move(event_header));
+ RowsEventHeader rows_header(event_header.type);
+ rows_header.parse(event_payload);
+ if (doReplicate(rows_header.table_id))
+ event = std::make_shared(table_maps.at(rows_header.table_id), std::move(event_header), rows_header);
else
event = std::make_shared(std::move(event_header));
event->parseEvent(event_payload);
+ if (rows_header.flags & ROWS_END_OF_STATEMENT)
+ table_maps.clear();
break;
}
case GTID_EVENT:
@@ -843,6 +861,19 @@ namespace MySQLReplication
}
}
}
+
+ bool MySQLFlavor::doReplicate(UInt64 table_id)
+ {
+ if (replicate_do_db.empty())
+ return false;
+ if (table_id == 0x00ffffff)
+ {
+ // Special "dummy event"
+ return false;
+ }
+ auto table_map = table_maps.at(table_id);
+ return table_map->schema == replicate_do_db;
+ }
}
}
diff --git a/src/Core/MySQL/MySQLReplication.h b/src/Core/MySQL/MySQLReplication.h
index 7c7604cad58..d415bdda70d 100644
--- a/src/Core/MySQL/MySQLReplication.h
+++ b/src/Core/MySQL/MySQLReplication.h
@@ -430,6 +430,22 @@ namespace MySQLReplication
void parseMeta(String meta);
};
+ enum RowsEventFlags
+ {
+ ROWS_END_OF_STATEMENT = 1
+ };
+
+ class RowsEventHeader
+ {
+ public:
+ EventType type;
+ UInt64 table_id;
+ UInt16 flags;
+
+ RowsEventHeader(EventType type_) : type(type_), table_id(0), flags(0) {}
+ void parse(ReadBuffer & payload);
+ };
+
class RowsEvent : public EventBase
{
public:
@@ -438,9 +454,11 @@ namespace MySQLReplication
String table;
std::vector rows;
- RowsEvent(std::shared_ptr table_map_, EventHeader && header_)
- : EventBase(std::move(header_)), number_columns(0), table_id(0), flags(0), extra_data_len(0), table_map(table_map_)
+ RowsEvent(std::shared_ptr table_map_, EventHeader && header_, const RowsEventHeader & rows_header)
+ : EventBase(std::move(header_)), number_columns(0), table_map(table_map_)
{
+ table_id = rows_header.table_id;
+ flags = rows_header.flags;
schema = table_map->schema;
table = table_map->table;
}
@@ -450,7 +468,6 @@ namespace MySQLReplication
protected:
UInt64 table_id;
UInt16 flags;
- UInt16 extra_data_len;
Bitmap columns_present_bitmap1;
Bitmap columns_present_bitmap2;
@@ -464,21 +481,24 @@ namespace MySQLReplication
class WriteRowsEvent : public RowsEvent
{
public:
- WriteRowsEvent(std::shared_ptr table_map_, EventHeader && header_) : RowsEvent(table_map_, std::move(header_)) {}
+ WriteRowsEvent(std::shared_ptr table_map_, EventHeader && header_, const RowsEventHeader & rows_header)
+ : RowsEvent(table_map_, std::move(header_), rows_header) {}
MySQLEventType type() const override { return MYSQL_WRITE_ROWS_EVENT; }
};
class DeleteRowsEvent : public RowsEvent
{
public:
- DeleteRowsEvent(std::shared_ptr table_map_, EventHeader && header_) : RowsEvent(table_map_, std::move(header_)) {}
+ DeleteRowsEvent(std::shared_ptr table_map_, EventHeader && header_, const RowsEventHeader & rows_header)
+ : RowsEvent(table_map_, std::move(header_), rows_header) {}
MySQLEventType type() const override { return MYSQL_DELETE_ROWS_EVENT; }
};
class UpdateRowsEvent : public RowsEvent
{
public:
- UpdateRowsEvent(std::shared_ptr table_map_, EventHeader && header_) : RowsEvent(table_map_, std::move(header_)) {}
+ UpdateRowsEvent(std::shared_ptr table_map_, EventHeader && header_, const RowsEventHeader & rows_header)
+ : RowsEvent(table_map_, std::move(header_), rows_header) {}
MySQLEventType type() const override { return MYSQL_UPDATE_ROWS_EVENT; }
};
@@ -546,10 +566,10 @@ namespace MySQLReplication
Position position;
BinlogEventPtr event;
String replicate_do_db;
- std::shared_ptr table_map;
+ std::map > table_maps;
size_t checksum_signature_length = 4;
- inline bool doReplicate() { return (replicate_do_db.empty() || table_map->schema == replicate_do_db); }
+ bool doReplicate(UInt64 table_id);
};
}
diff --git a/src/Core/Protocol.h b/src/Core/Protocol.h
index f383e509751..df51a0cb61a 100644
--- a/src/Core/Protocol.h
+++ b/src/Core/Protocol.h
@@ -75,8 +75,9 @@ namespace Protocol
TablesStatusResponse = 9, /// A response to TablesStatus request.
Log = 10, /// System logs of the query execution
TableColumns = 11, /// Columns' description for default values calculation
+ PartUUIDs = 12, /// List of unique parts ids.
- MAX = TableColumns,
+ MAX = PartUUIDs,
};
/// NOTE: If the type of packet argument would be Enum, the comparison packet >= 0 && packet < 10
@@ -98,6 +99,7 @@ namespace Protocol
"TablesStatusResponse",
"Log",
"TableColumns",
+ "PartUUIDs",
};
return packet <= MAX
? data[packet]
@@ -132,8 +134,9 @@ namespace Protocol
TablesStatusRequest = 5, /// Check status of tables on the server.
KeepAlive = 6, /// Keep the connection alive
Scalar = 7, /// A block of data (compressed or not).
+ IgnoredPartUUIDs = 8, /// List of unique parts ids to exclude from query processing
- MAX = Scalar,
+ MAX = IgnoredPartUUIDs,
};
inline const char * toString(UInt64 packet)
@@ -147,6 +150,7 @@ namespace Protocol
"TablesStatusRequest",
"KeepAlive",
"Scalar",
+ "IgnoredPartUUIDs",
};
return packet <= MAX
? data[packet]
diff --git a/src/Core/Settings.h b/src/Core/Settings.h
index c4cf3803913..ecd3fa9e746 100644
--- a/src/Core/Settings.h
+++ b/src/Core/Settings.h
@@ -420,6 +420,8 @@ class IColumn;
M(Bool, async_socket_for_remote, true, "Asynchronously read from socket executing remote query", 0) \
\
M(Bool, optimize_rewrite_sum_if_to_count_if, true, "Rewrite sumIf() and sum(if()) function countIf() function when logically equivalent", 0) \
+ M(Bool, allow_experimental_query_deduplication, false, "Allow sending parts' UUIDs for a query in order to deduplicate data parts if any", 0) \
+ \
/** Obsolete settings that do nothing but left for compatibility reasons. Remove each one after half a year of obsolescence. */ \
\
M(UInt64, max_memory_usage_for_all_queries, 0, "Obsolete. Will be removed after 2020-10-20", 0) \
diff --git a/src/DataStreams/RemoteQueryExecutor.cpp b/src/DataStreams/RemoteQueryExecutor.cpp
index 14e51ffefdf..fc3870b3f22 100644
--- a/src/DataStreams/RemoteQueryExecutor.cpp
+++ b/src/DataStreams/RemoteQueryExecutor.cpp
@@ -13,6 +13,7 @@
#include
#include
#include
+#include
namespace DB
{
@@ -20,6 +21,7 @@ namespace DB
namespace ErrorCodes
{
extern const int UNKNOWN_PACKET_FROM_SERVER;
+ extern const int DUPLICATED_PART_UUIDS;
}
RemoteQueryExecutor::RemoteQueryExecutor(
@@ -158,6 +160,7 @@ void RemoteQueryExecutor::sendQuery()
std::lock_guard guard(was_cancelled_mutex);
established = true;
+ was_cancelled = false;
auto timeouts = ConnectionTimeouts::getTCPTimeoutsWithFailover(settings);
ClientInfo modified_client_info = context.getClientInfo();
@@ -167,6 +170,12 @@ void RemoteQueryExecutor::sendQuery()
modified_client_info.client_trace_context = CurrentThread::get().thread_trace_context;
}
+ {
+ std::lock_guard lock(duplicated_part_uuids_mutex);
+ if (!duplicated_part_uuids.empty())
+ multiplexed_connections->sendIgnoredPartUUIDs(duplicated_part_uuids);
+ }
+
multiplexed_connections->sendQuery(timeouts, query, query_id, stage, modified_client_info, true);
established = false;
@@ -196,6 +205,8 @@ Block RemoteQueryExecutor::read()
if (auto block = processPacket(std::move(packet)))
return *block;
+ else if (got_duplicated_part_uuids)
+ return std::get(restartQueryWithoutDuplicatedUUIDs());
}
}
@@ -211,7 +222,7 @@ std::variant RemoteQueryExecutor::read(std::unique_ptr
return Block();
}
- if (!read_context)
+ if (!read_context || resent_query)
{
std::lock_guard lock(was_cancelled_mutex);
if (was_cancelled)
@@ -234,6 +245,8 @@ std::variant RemoteQueryExecutor::read(std::unique_ptr
{
if (auto data = processPacket(std::move(read_context->packet)))
return std::move(*data);
+ else if (got_duplicated_part_uuids)
+ return restartQueryWithoutDuplicatedUUIDs(&read_context);
}
}
while (true);
@@ -242,10 +255,39 @@ std::variant RemoteQueryExecutor::read(std::unique_ptr
#endif
}
+
+std::variant RemoteQueryExecutor::restartQueryWithoutDuplicatedUUIDs(std::unique_ptr * read_context)
+{
+ /// Cancel previous query and disconnect before retry.
+ cancel(read_context);
+ multiplexed_connections->disconnect();
+
+ /// Only resend once, otherwise throw an exception
+ if (!resent_query)
+ {
+ if (log)
+ LOG_DEBUG(log, "Found duplicate UUIDs, will retry query without those parts");
+
+ resent_query = true;
+ sent_query = false;
+ got_duplicated_part_uuids = false;
+ /// Consecutive read will implicitly send query first.
+ if (!read_context)
+ return read();
+ else
+ return read(*read_context);
+ }
+ throw Exception("Found duplicate uuids while processing query.", ErrorCodes::DUPLICATED_PART_UUIDS);
+}
+
std::optional RemoteQueryExecutor::processPacket(Packet packet)
{
switch (packet.type)
{
+ case Protocol::Server::PartUUIDs:
+ if (!setPartUUIDs(packet.part_uuids))
+ got_duplicated_part_uuids = true;
+ break;
case Protocol::Server::Data:
/// If the block is not empty and is not a header block
if (packet.block && (packet.block.rows() > 0))
@@ -306,6 +348,20 @@ std::optional RemoteQueryExecutor::processPacket(Packet packet)
return {};
}
+bool RemoteQueryExecutor::setPartUUIDs(const std::vector & uuids)
+{
+ Context & query_context = const_cast(context).getQueryContext();
+ auto duplicates = query_context.getPartUUIDs()->add(uuids);
+
+ if (!duplicates.empty())
+ {
+ std::lock_guard lock(duplicated_part_uuids_mutex);
+ duplicated_part_uuids.insert(duplicated_part_uuids.begin(), duplicates.begin(), duplicates.end());
+ return false;
+ }
+ return true;
+}
+
void RemoteQueryExecutor::finish(std::unique_ptr * read_context)
{
/** If one of:
@@ -383,6 +439,7 @@ void RemoteQueryExecutor::sendExternalTables()
{
std::lock_guard lock(external_tables_mutex);
+ external_tables_data.clear();
external_tables_data.reserve(count);
for (size_t i = 0; i < count; ++i)
diff --git a/src/DataStreams/RemoteQueryExecutor.h b/src/DataStreams/RemoteQueryExecutor.h
index 46d9d067563..6a10627b948 100644
--- a/src/DataStreams/RemoteQueryExecutor.h
+++ b/src/DataStreams/RemoteQueryExecutor.h
@@ -57,6 +57,9 @@ public:
/// Create connection and send query, external tables and scalars.
void sendQuery();
+ /// Query is resent to a replica, the query itself can be modified.
+ std::atomic resent_query { false };
+
/// Read next block of data. Returns empty block if query is finished.
Block read();
@@ -152,6 +155,14 @@ private:
*/
std::atomic got_unknown_packet_from_replica { false };
+ /** Got duplicated uuids from replica
+ */
+ std::atomic got_duplicated_part_uuids{ false };
+
+ /// Parts uuids, collected from remote replicas
+ std::mutex duplicated_part_uuids_mutex;
+ std::vector duplicated_part_uuids;
+
PoolMode pool_mode = PoolMode::GET_MANY;
StorageID main_table = StorageID::createEmpty();
@@ -163,6 +174,14 @@ private:
/// Send all temporary tables to remote servers
void sendExternalTables();
+ /// Set part uuids to a query context, collected from remote replicas.
+ /// Return true if duplicates found.
+ bool setPartUUIDs(const std::vector & uuids);
+
+ /// Cancell query and restart it with info about duplicated UUIDs
+ /// only for `allow_experimental_query_deduplication`.
+ std::variant restartQueryWithoutDuplicatedUUIDs(std::unique_ptr * read_context = nullptr);
+
/// If wasn't sent yet, send request to cancel all connections to replicas
void tryCancel(const char * reason, std::unique_ptr * read_context);
@@ -174,6 +193,10 @@ private:
/// Process packet for read and return data block if possible.
std::optional processPacket(Packet packet);
+
+ /// Reads packet by packet
+ Block readPackets();
+
};
}
diff --git a/src/DataTypes/NumberTraits.h b/src/DataTypes/NumberTraits.h
index 3aa00c68274..c3b0d956ef5 100644
--- a/src/DataTypes/NumberTraits.h
+++ b/src/DataTypes/NumberTraits.h
@@ -104,11 +104,16 @@ template struct ResultOfIntegerDivision
sizeof(A)>::Type;
};
-/** Division with remainder you get a number with the same number of bits as in divisor.
- */
+/** Division with remainder you get a number with the same number of bits as in divisor,
+ * or larger in case of signed type.
+ */
template struct ResultOfModulo
{
- using Type0 = typename Construct || is_signed_v, false, sizeof(B)>::Type;
+ static constexpr bool result_is_signed = is_signed_v;
+ /// If modulo of division can yield negative number, we need larger type to accommodate it.
+ /// Example: toInt32(-199) % toUInt8(200) will return -199 that does not fit in Int8, only in Int16.
+ static constexpr size_t size_of_result = result_is_signed ? nextSize(sizeof(B)) : sizeof(B);
+ using Type0 = typename Construct::Type;
using Type = std::conditional_t || std::is_floating_point_v, Float64, Type0>;
};
diff --git a/src/Disks/DiskCacheWrapper.cpp b/src/Disks/DiskCacheWrapper.cpp
index 26e6b7609f3..6d991c17c67 100644
--- a/src/Disks/DiskCacheWrapper.cpp
+++ b/src/Disks/DiskCacheWrapper.cpp
@@ -108,7 +108,7 @@ DiskCacheWrapper::readFile(const String & path, size_t buf_size, size_t estimate
if (!cache_file_predicate(path))
return DiskDecorator::readFile(path, buf_size, estimated_size, aio_threshold, mmap_threshold);
- LOG_DEBUG(&Poco::Logger::get("DiskS3"), "Read file {} from cache", backQuote(path));
+ LOG_DEBUG(&Poco::Logger::get("DiskCache"), "Read file {} from cache", backQuote(path));
if (cache_disk->exists(path))
return cache_disk->readFile(path, buf_size, estimated_size, aio_threshold, mmap_threshold);
@@ -122,11 +122,11 @@ DiskCacheWrapper::readFile(const String & path, size_t buf_size, size_t estimate
{
/// This thread will responsible for file downloading to cache.
metadata->status = DOWNLOADING;
- LOG_DEBUG(&Poco::Logger::get("DiskS3"), "File {} doesn't exist in cache. Will download it", backQuote(path));
+ LOG_DEBUG(&Poco::Logger::get("DiskCache"), "File {} doesn't exist in cache. Will download it", backQuote(path));
}
else if (metadata->status == DOWNLOADING)
{
- LOG_DEBUG(&Poco::Logger::get("DiskS3"), "Waiting for file {} download to cache", backQuote(path));
+ LOG_DEBUG(&Poco::Logger::get("DiskCache"), "Waiting for file {} download to cache", backQuote(path));
metadata->condition.wait(lock, [metadata] { return metadata->status == DOWNLOADED || metadata->status == ERROR; });
}
}
@@ -139,7 +139,7 @@ DiskCacheWrapper::readFile(const String & path, size_t buf_size, size_t estimate
{
try
{
- auto dir_path = getDirectoryPath(path);
+ auto dir_path = directoryPath(path);
if (!cache_disk->exists(dir_path))
cache_disk->createDirectories(dir_path);
@@ -151,11 +151,11 @@ DiskCacheWrapper::readFile(const String & path, size_t buf_size, size_t estimate
}
cache_disk->moveFile(tmp_path, path);
- LOG_DEBUG(&Poco::Logger::get("DiskS3"), "File {} downloaded to cache", backQuote(path));
+ LOG_DEBUG(&Poco::Logger::get("DiskCache"), "File {} downloaded to cache", backQuote(path));
}
catch (...)
{
- tryLogCurrentException("DiskS3", "Failed to download file + " + backQuote(path) + " to cache");
+ tryLogCurrentException("DiskCache", "Failed to download file + " + backQuote(path) + " to cache");
result_status = ERROR;
}
}
@@ -180,9 +180,9 @@ DiskCacheWrapper::writeFile(const String & path, size_t buf_size, WriteMode mode
if (!cache_file_predicate(path))
return DiskDecorator::writeFile(path, buf_size, mode);
- LOG_DEBUG(&Poco::Logger::get("DiskS3"), "Write file {} to cache", backQuote(path));
+ LOG_DEBUG(&Poco::Logger::get("DiskCache"), "Write file {} to cache", backQuote(path));
- auto dir_path = getDirectoryPath(path);
+ auto dir_path = directoryPath(path);
if (!cache_disk->exists(dir_path))
cache_disk->createDirectories(dir_path);
@@ -217,7 +217,7 @@ void DiskCacheWrapper::moveFile(const String & from_path, const String & to_path
{
if (cache_disk->exists(from_path))
{
- auto dir_path = getDirectoryPath(to_path);
+ auto dir_path = directoryPath(to_path);
if (!cache_disk->exists(dir_path))
cache_disk->createDirectories(dir_path);
@@ -230,7 +230,7 @@ void DiskCacheWrapper::replaceFile(const String & from_path, const String & to_p
{
if (cache_disk->exists(from_path))
{
- auto dir_path = getDirectoryPath(to_path);
+ auto dir_path = directoryPath(to_path);
if (!cache_disk->exists(dir_path))
cache_disk->createDirectories(dir_path);
@@ -239,19 +239,6 @@ void DiskCacheWrapper::replaceFile(const String & from_path, const String & to_p
DiskDecorator::replaceFile(from_path, to_path);
}
-void DiskCacheWrapper::copyFile(const String & from_path, const String & to_path)
-{
- if (cache_disk->exists(from_path))
- {
- auto dir_path = getDirectoryPath(to_path);
- if (!cache_disk->exists(dir_path))
- cache_disk->createDirectories(dir_path);
-
- cache_disk->copyFile(from_path, to_path);
- }
- DiskDecorator::copyFile(from_path, to_path);
-}
-
void DiskCacheWrapper::removeFile(const String & path)
{
cache_disk->removeFileIfExists(path);
@@ -280,9 +267,10 @@ void DiskCacheWrapper::removeRecursive(const String & path)
void DiskCacheWrapper::createHardLink(const String & src_path, const String & dst_path)
{
- if (cache_disk->exists(src_path))
+ /// Don't create hardlinks for cache files to shadow directory as it just waste cache disk space.
+ if (cache_disk->exists(src_path) && !dst_path.starts_with("shadow/"))
{
- auto dir_path = getDirectoryPath(dst_path);
+ auto dir_path = directoryPath(dst_path);
if (!cache_disk->exists(dir_path))
cache_disk->createDirectories(dir_path);
@@ -303,11 +291,6 @@ void DiskCacheWrapper::createDirectories(const String & path)
DiskDecorator::createDirectories(path);
}
-inline String DiskCacheWrapper::getDirectoryPath(const String & path)
-{
- return Poco::Path{path}.setFileName("").toString();
-}
-
/// TODO: Current reservation mechanism leaks IDisk abstraction details.
/// This hack is needed to return proper disk pointer (wrapper instead of implementation) from reservation object.
class ReservationDelegate : public IReservation
diff --git a/src/Disks/DiskCacheWrapper.h b/src/Disks/DiskCacheWrapper.h
index 10d24bf92e8..bf1a5df693a 100644
--- a/src/Disks/DiskCacheWrapper.h
+++ b/src/Disks/DiskCacheWrapper.h
@@ -32,7 +32,6 @@ public:
void moveDirectory(const String & from_path, const String & to_path) override;
void moveFile(const String & from_path, const String & to_path) override;
void replaceFile(const String & from_path, const String & to_path) override;
- void copyFile(const String & from_path, const String & to_path) override;
std::unique_ptr
readFile(const String & path, size_t buf_size, size_t estimated_size, size_t aio_threshold, size_t mmap_threshold) const override;
std::unique_ptr
@@ -46,7 +45,6 @@ public:
private:
std::shared_ptr acquireDownloadMetadata(const String & path) const;
- static String getDirectoryPath(const String & path);
/// Disk to cache files.
std::shared_ptr cache_disk;
diff --git a/src/Disks/DiskDecorator.cpp b/src/Disks/DiskDecorator.cpp
index 0c052ce8e91..3ebd1b6cf3b 100644
--- a/src/Disks/DiskDecorator.cpp
+++ b/src/Disks/DiskDecorator.cpp
@@ -103,11 +103,6 @@ void DiskDecorator::replaceFile(const String & from_path, const String & to_path
delegate->replaceFile(from_path, to_path);
}
-void DiskDecorator::copyFile(const String & from_path, const String & to_path)
-{
- delegate->copyFile(from_path, to_path);
-}
-
void DiskDecorator::copy(const String & from_path, const std::shared_ptr & to_disk, const String & to_path)
{
delegate->copy(from_path, to_disk, to_path);
@@ -185,4 +180,9 @@ SyncGuardPtr DiskDecorator::getDirectorySyncGuard(const String & path) const
return delegate->getDirectorySyncGuard(path);
}
+void DiskDecorator::onFreeze(const String & path)
+{
+ delegate->onFreeze(path);
+}
+
}
diff --git a/src/Disks/DiskDecorator.h b/src/Disks/DiskDecorator.h
index b50252c2c97..c204d10bed9 100644
--- a/src/Disks/DiskDecorator.h
+++ b/src/Disks/DiskDecorator.h
@@ -32,7 +32,6 @@ public:
void createFile(const String & path) override;
void moveFile(const String & from_path, const String & to_path) override;
void replaceFile(const String & from_path, const String & to_path) override;
- void copyFile(const String & from_path, const String & to_path) override;
void copy(const String & from_path, const std::shared_ptr & to_disk, const String & to_path) override;
void listFiles(const String & path, std::vector & file_names) override;
std::unique_ptr
@@ -48,8 +47,9 @@ public:
void setReadOnly(const String & path) override;
void createHardLink(const String & src_path, const String & dst_path) override;
void truncateFile(const String & path, size_t size) override;
- const String getType() const override { return delegate->getType(); }
+ DiskType::Type getType() const override { return delegate->getType(); }
Executor & getExecutor() override;
+ void onFreeze(const String & path) override;
SyncGuardPtr getDirectorySyncGuard(const String & path) const override;
protected:
diff --git a/src/Disks/DiskLocal.cpp b/src/Disks/DiskLocal.cpp
index 8787f613bf7..5035a865191 100644
--- a/src/Disks/DiskLocal.cpp
+++ b/src/Disks/DiskLocal.cpp
@@ -218,11 +218,6 @@ void DiskLocal::replaceFile(const String & from_path, const String & to_path)
from_file.renameTo(to_file.path());
}
-void DiskLocal::copyFile(const String & from_path, const String & to_path)
-{
- Poco::File(disk_path + from_path).copyTo(disk_path + to_path);
-}
-
std::unique_ptr
DiskLocal::readFile(const String & path, size_t buf_size, size_t estimated_size, size_t aio_threshold, size_t mmap_threshold) const
{
diff --git a/src/Disks/DiskLocal.h b/src/Disks/DiskLocal.h
index d8d45290986..7dbfbe445f8 100644
--- a/src/Disks/DiskLocal.h
+++ b/src/Disks/DiskLocal.h
@@ -67,8 +67,6 @@ public:
void replaceFile(const String & from_path, const String & to_path) override;
- void copyFile(const String & from_path, const String & to_path) override;
-
void copy(const String & from_path, const std::shared_ptr & to_disk, const String & to_path) override;
void listFiles(const String & path, std::vector & file_names) override;
@@ -100,7 +98,7 @@ public:
void truncateFile(const String & path, size_t size) override;
- const String getType() const override { return "local"; }
+ DiskType::Type getType() const override { return DiskType::Type::Local; }
SyncGuardPtr getDirectorySyncGuard(const String & path) const override;
diff --git a/src/Disks/DiskMemory.cpp b/src/Disks/DiskMemory.cpp
index d2ed91a8263..a0905e67427 100644
--- a/src/Disks/DiskMemory.cpp
+++ b/src/Disks/DiskMemory.cpp
@@ -314,11 +314,6 @@ void DiskMemory::replaceFileImpl(const String & from_path, const String & to_pat
files.insert(std::move(node));
}
-void DiskMemory::copyFile(const String & /*from_path*/, const String & /*to_path*/)
-{
- throw Exception("Method copyFile is not implemented for memory disks", ErrorCodes::NOT_IMPLEMENTED);
-}
-
std::unique_ptr DiskMemory::readFile(const String & path, size_t /*buf_size*/, size_t, size_t, size_t) const
{
std::lock_guard lock(mutex);
diff --git a/src/Disks/DiskMemory.h b/src/Disks/DiskMemory.h
index 3ebc76661d4..29ac4919833 100644
--- a/src/Disks/DiskMemory.h
+++ b/src/Disks/DiskMemory.h
@@ -60,8 +60,6 @@ public:
void replaceFile(const String & from_path, const String & to_path) override;
- void copyFile(const String & from_path, const String & to_path) override;
-
void listFiles(const String & path, std::vector & file_names) override;
std::unique_ptr readFile(
@@ -91,7 +89,7 @@ public:
void truncateFile(const String & path, size_t size) override;
- const String getType() const override { return "memory"; }
+ DiskType::Type getType() const override { return DiskType::Type::RAM; }
private:
void createDirectoriesImpl(const String & path);
diff --git a/src/Disks/IDisk.h b/src/Disks/IDisk.h
index f41490a0807..6f021346174 100644
--- a/src/Disks/IDisk.h
+++ b/src/Disks/IDisk.h
@@ -57,6 +57,29 @@ public:
using SpacePtr = std::shared_ptr;
+struct DiskType
+{
+ enum class Type
+ {
+ Local,
+ RAM,
+ S3
+ };
+ static String toString(Type disk_type)
+ {
+ switch (disk_type)
+ {
+ case Type::Local:
+ return "local";
+ case Type::RAM:
+ return "memory";
+ case Type::S3:
+ return "s3";
+ }
+ __builtin_unreachable();
+ }
+};
+
/**
* A guard, that should synchronize file's or directory's state
* with storage device (e.g. fsync in POSIX) in its destructor.
@@ -140,9 +163,6 @@ public:
/// If a file with `to_path` path already exists, it will be replaced.
virtual void replaceFile(const String & from_path, const String & to_path) = 0;
- /// Copy the file from `from_path` to `to_path`.
- virtual void copyFile(const String & from_path, const String & to_path) = 0;
-
/// Recursively copy data containing at `from_path` to `to_path` located at `to_disk`.
virtual void copy(const String & from_path, const std::shared_ptr & to_disk, const String & to_path);
@@ -191,7 +211,7 @@ public:
virtual void truncateFile(const String & path, size_t size);
/// Return disk type - "local", "s3", etc.
- virtual const String getType() const = 0;
+ virtual DiskType::Type getType() const = 0;
/// Invoked when Global Context is shutdown.
virtual void shutdown() { }
@@ -199,6 +219,9 @@ public:
/// Returns executor to perform asynchronous operations.
virtual Executor & getExecutor() { return *executor; }
+ /// Invoked on partitions freeze query.
+ virtual void onFreeze(const String &) { }
+
/// Returns guard, that insures synchronization of directory metadata with storage device.
virtual SyncGuardPtr getDirectorySyncGuard(const String & path) const;
@@ -269,4 +292,11 @@ inline String fileName(const String & path)
{
return Poco::Path(path).getFileName();
}
+
+/// Return directory path for the specified path.
+inline String directoryPath(const String & path)
+{
+ return Poco::Path(path).setFileName("").toString();
+}
+
}
diff --git a/src/Disks/S3/DiskS3.cpp b/src/Disks/S3/DiskS3.cpp
index 238db98c9cc..3d91d5fbb78 100644
--- a/src/Disks/S3/DiskS3.cpp
+++ b/src/Disks/S3/DiskS3.cpp
@@ -23,6 +23,8 @@
#include
#include
#include
+#include
+#include
#include
@@ -32,12 +34,15 @@ namespace DB
namespace ErrorCodes
{
+ extern const int S3_ERROR;
extern const int FILE_ALREADY_EXISTS;
extern const int CANNOT_SEEK_THROUGH_FILE;
extern const int UNKNOWN_FORMAT;
extern const int INCORRECT_DISK_INDEX;
+ extern const int BAD_ARGUMENTS;
extern const int PATH_ACCESS_DENIED;
extern const int CANNOT_DELETE_DIRECTORY;
+ extern const int LOGICAL_ERROR;
}
@@ -76,12 +81,12 @@ String getRandomName()
}
template
-void throwIfError(Aws::Utils::Outcome && response)
+void throwIfError(Aws::Utils::Outcome & response)
{
if (!response.IsSuccess())
{
const auto & err = response.GetError();
- throw Exception(err.GetMessage(), static_cast(err.GetErrorType()));
+ throw Exception(std::to_string(static_cast(err.GetErrorType())) + ": " + err.GetMessage(), ErrorCodes::S3_ERROR);
}
}
@@ -244,7 +249,7 @@ public:
if (whence == SEEK_CUR)
{
/// If position within current working buffer - shift pos.
- if (working_buffer.size() && size_t(getPosition() + offset_) < absolute_position)
+ if (!working_buffer.empty() && size_t(getPosition() + offset_) < absolute_position)
{
pos += offset_;
return getPosition();
@@ -257,7 +262,7 @@ public:
else if (whence == SEEK_SET)
{
/// If position within current working buffer - shift pos.
- if (working_buffer.size() && size_t(offset_) >= absolute_position - working_buffer.size()
+ if (!working_buffer.empty() && size_t(offset_) >= absolute_position - working_buffer.size()
&& size_t(offset_) < absolute_position)
{
pos = working_buffer.end() - (absolute_position - offset_);
@@ -500,17 +505,17 @@ private:
CurrentMetrics::Increment metric_increment;
};
-/// Runs tasks asynchronously using global thread pool.
+/// Runs tasks asynchronously using thread pool.
class AsyncExecutor : public Executor
{
public:
- explicit AsyncExecutor() = default;
+ explicit AsyncExecutor(int thread_pool_size) : pool(ThreadPool(thread_pool_size)) { }
std::future execute(std::function task) override
{
auto promise = std::make_shared>();
- GlobalThreadPool::instance().scheduleOrThrowOnError(
+ pool.scheduleOrThrowOnError(
[promise, task]()
{
try
@@ -531,6 +536,9 @@ public:
return promise->get_future();
}
+
+private:
+ ThreadPool pool;
};
@@ -544,8 +552,10 @@ DiskS3::DiskS3(
size_t min_upload_part_size_,
size_t max_single_part_upload_size_,
size_t min_bytes_for_seek_,
- bool send_metadata_)
- : IDisk(std::make_unique())
+ bool send_metadata_,
+ int thread_pool_size_,
+ int list_object_keys_size_)
+ : IDisk(std::make_unique(thread_pool_size_))
, name(std::move(name_))
, client(std::move(client_))
, proxy_configuration(std::move(proxy_configuration_))
@@ -556,6 +566,8 @@ DiskS3::DiskS3(
, max_single_part_upload_size(max_single_part_upload_size_)
, min_bytes_for_seek(min_bytes_for_seek_)
, send_metadata(send_metadata_)
+ , revision_counter(0)
+ , list_object_keys_size(list_object_keys_size_)
{
}
@@ -613,45 +625,31 @@ void DiskS3::moveFile(const String & from_path, const String & to_path)
{
if (exists(to_path))
throw Exception("File already exists: " + to_path, ErrorCodes::FILE_ALREADY_EXISTS);
+
+ if (send_metadata)
+ {
+ auto revision = ++revision_counter;
+ const DiskS3::ObjectMetadata object_metadata {
+ {"from_path", from_path},
+ {"to_path", to_path}
+ };
+ createFileOperationObject("rename", revision, object_metadata);
+ }
+
Poco::File(metadata_path + from_path).renameTo(metadata_path + to_path);
}
void DiskS3::replaceFile(const String & from_path, const String & to_path)
{
- Poco::File from_file(metadata_path + from_path);
- Poco::File to_file(metadata_path + to_path);
- if (to_file.exists())
+ if (exists(to_path))
{
- Poco::File tmp_file(metadata_path + to_path + ".old");
- to_file.renameTo(tmp_file.path());
- from_file.renameTo(metadata_path + to_path);
- removeFile(to_path + ".old");
+ const String tmp_path = to_path + ".old";
+ moveFile(to_path, tmp_path);
+ moveFile(from_path, to_path);
+ removeFile(tmp_path);
}
else
- from_file.renameTo(to_file.path());
-}
-
-void DiskS3::copyFile(const String & from_path, const String & to_path)
-{
- if (exists(to_path))
- removeFile(to_path);
-
- auto from = readMeta(from_path);
- auto to = createMeta(to_path);
-
- for (const auto & [path, size] : from.s3_objects)
- {
- auto new_path = getRandomName();
- Aws::S3::Model::CopyObjectRequest req;
- req.SetCopySource(bucket + "/" + s3_root_path + path);
- req.SetBucket(bucket);
- req.SetKey(s3_root_path + new_path);
- throwIfError(client->CopyObject(req));
-
- to.addObject(new_path, size);
- }
-
- to.save();
+ moveFile(from_path, to_path);
}
std::unique_ptr DiskS3::readFile(const String & path, size_t buf_size, size_t, size_t, size_t) const
@@ -673,7 +671,17 @@ std::unique_ptr DiskS3::writeFile(const String & path,
/// Path to store new S3 object.
auto s3_path = getRandomName();
- auto object_metadata = createObjectMetadata(path);
+
+ std::optional object_metadata;
+ if (send_metadata)
+ {
+ auto revision = ++revision_counter;
+ object_metadata = {
+ {"path", path}
+ };
+ s3_path = "r" + revisionToString(revision) + "-file-" + s3_path;
+ }
+
if (!exist || mode == WriteMode::Rewrite)
{
/// If metadata file exists - remove and create new.
@@ -777,7 +785,8 @@ void DiskS3::removeAws(const AwsS3KeyKeeper & keys)
Aws::S3::Model::DeleteObjectsRequest request;
request.SetBucket(bucket);
request.SetDelete(delkeys);
- throwIfError(client->DeleteObjects(request));
+ auto outcome = client->DeleteObjects(request);
+ throwIfError(outcome);
}
}
}
@@ -852,6 +861,17 @@ Poco::Timestamp DiskS3::getLastModified(const String & path)
void DiskS3::createHardLink(const String & src_path, const String & dst_path)
{
+ /// We don't need to record hardlinks created to shadow folder.
+ if (send_metadata && !dst_path.starts_with("shadow/"))
+ {
+ auto revision = ++revision_counter;
+ const ObjectMetadata object_metadata {
+ {"src_path", src_path},
+ {"dst_path", dst_path}
+ };
+ createFileOperationObject("hardlink", revision, object_metadata);
+ }
+
/// Increment number of references.
auto src = readMeta(src_path);
++src.ref_count;
@@ -886,12 +906,368 @@ void DiskS3::shutdown()
client->DisableRequestProcessing();
}
-std::optional DiskS3::createObjectMetadata(const String & path) const
+void DiskS3::createFileOperationObject(const String & operation_name, UInt64 revision, const DiskS3::ObjectMetadata & metadata)
{
- if (send_metadata)
- return (DiskS3::ObjectMetadata){{"path", path}};
+ const String key = "operations/r" + revisionToString(revision) + "-" + operation_name;
+ WriteBufferFromS3 buffer(client, bucket, s3_root_path + key, min_upload_part_size, max_single_part_upload_size, metadata);
+ buffer.write('0');
+ buffer.finalize();
+}
- return {};
+void DiskS3::startup()
+{
+ if (!send_metadata)
+ return;
+
+ LOG_INFO(&Poco::Logger::get("DiskS3"), "Starting up disk {}", name);
+
+ /// Find last revision.
+ UInt64 l = 0, r = LATEST_REVISION;
+ while (l < r)
+ {
+ LOG_DEBUG(&Poco::Logger::get("DiskS3"), "Check revision in bounds {}-{}", l, r);
+
+ auto revision = l + (r - l + 1) / 2;
+ auto revision_str = revisionToString(revision);
+
+ LOG_DEBUG(&Poco::Logger::get("DiskS3"), "Check object with revision {}", revision);
+
+ /// Check file or operation with such revision exists.
+ if (checkObjectExists(s3_root_path + "r" + revision_str)
+ || checkObjectExists(s3_root_path + "operations/r" + revision_str))
+ l = revision;
+ else
+ r = revision - 1;
+ }
+ revision_counter = l;
+ LOG_INFO(&Poco::Logger::get("DiskS3"), "Found last revision number {} for disk {}", revision_counter, name);
+}
+
+bool DiskS3::checkObjectExists(const String & prefix)
+{
+ Aws::S3::Model::ListObjectsV2Request request;
+ request.SetBucket(bucket);
+ request.SetPrefix(prefix);
+ request.SetMaxKeys(1);
+
+ auto outcome = client->ListObjectsV2(request);
+ throwIfError(outcome);
+
+ return !outcome.GetResult().GetContents().empty();
+}
+
+Aws::S3::Model::HeadObjectResult DiskS3::headObject(const String & source_bucket, const String & key)
+{
+ Aws::S3::Model::HeadObjectRequest request;
+ request.SetBucket(source_bucket);
+ request.SetKey(key);
+
+ auto outcome = client->HeadObject(request);
+ throwIfError(outcome);
+
+ return outcome.GetResultWithOwnership();
+}
+
+void DiskS3::listObjects(const String & source_bucket, const String & source_path, std::function callback)
+{
+ Aws::S3::Model::ListObjectsV2Request request;
+ request.SetBucket(source_bucket);
+ request.SetPrefix(source_path);
+ request.SetMaxKeys(list_object_keys_size);
+
+ Aws::S3::Model::ListObjectsV2Outcome outcome;
+ do
+ {
+ outcome = client->ListObjectsV2(request);
+ throwIfError(outcome);
+
+ bool should_continue = callback(outcome.GetResult());
+
+ if (!should_continue)
+ break;
+
+ request.SetContinuationToken(outcome.GetResult().GetNextContinuationToken());
+ } while (outcome.GetResult().GetIsTruncated());
+}
+
+void DiskS3::copyObject(const String & src_bucket, const String & src_key, const String & dst_bucket, const String & dst_key)
+{
+ Aws::S3::Model::CopyObjectRequest request;
+ request.SetCopySource(src_bucket + "/" + src_key);
+ request.SetBucket(dst_bucket);
+ request.SetKey(dst_key);
+
+ auto outcome = client->CopyObject(request);
+ throwIfError(outcome);
+}
+
+struct DiskS3::RestoreInformation
+{
+ UInt64 revision = LATEST_REVISION;
+ String source_bucket;
+ String source_path;
+};
+
+void DiskS3::readRestoreInformation(DiskS3::RestoreInformation & restore_information)
+{
+ ReadBufferFromFile buffer(metadata_path + restore_file_name, 512);
+ buffer.next();
+
+ /// Empty file - just restore all metadata.
+ if (!buffer.hasPendingData())
+ return;
+
+ try
+ {
+ readIntText(restore_information.revision, buffer);
+ assertChar('\n', buffer);
+
+ if (!buffer.hasPendingData())
+ return;
+
+ readText(restore_information.source_bucket, buffer);
+ assertChar('\n', buffer);
+
+ if (!buffer.hasPendingData())
+ return;
+
+ readText(restore_information.source_path, buffer);
+ assertChar('\n', buffer);
+
+ if (buffer.hasPendingData())
+ throw Exception("Extra information at the end of restore file", ErrorCodes::UNKNOWN_FORMAT);
+ }
+ catch (const Exception & e)
+ {
+ throw Exception("Failed to read restore information", e, ErrorCodes::UNKNOWN_FORMAT);
+ }
+}
+
+void DiskS3::restore()
+{
+ if (!exists(restore_file_name))
+ return;
+
+ try
+ {
+ RestoreInformation information;
+ information.source_bucket = bucket;
+ information.source_path = s3_root_path;
+
+ readRestoreInformation(information);
+ if (information.revision == 0)
+ information.revision = LATEST_REVISION;
+ if (!information.source_path.ends_with('/'))
+ information.source_path += '/';
+
+ if (information.source_bucket == bucket)
+ {
+ /// In this case we need to additionally cleanup S3 from objects with later revision.
+ /// Will be simply just restore to different path.
+ if (information.source_path == s3_root_path && information.revision != LATEST_REVISION)
+ throw Exception("Restoring to the same bucket and path is allowed if revision is latest (0)", ErrorCodes::BAD_ARGUMENTS);
+
+ /// This case complicates S3 cleanup in case of unsuccessful restore.
+ if (information.source_path != s3_root_path && s3_root_path.starts_with(information.source_path))
+ throw Exception("Restoring to the same bucket is allowed only if source path is not a sub-path of configured path in S3 disk", ErrorCodes::BAD_ARGUMENTS);
+ }
+
+ ///TODO: Cleanup FS and bucket if previous restore was failed.
+
+ LOG_INFO(&Poco::Logger::get("DiskS3"), "Starting to restore disk {}. Revision: {}, Source bucket: {}, Source path: {}",
+ name, information.revision, information.source_bucket, information.source_path);
+
+ restoreFiles(information.source_bucket, information.source_path, information.revision);
+ restoreFileOperations(information.source_bucket, information.source_path, information.revision);
+
+ Poco::File restore_file(metadata_path + restore_file_name);
+ restore_file.remove();
+
+ LOG_INFO(&Poco::Logger::get("DiskS3"), "Restore disk {} finished", name);
+ }
+ catch (const Exception & e)
+ {
+ LOG_ERROR(&Poco::Logger::get("DiskS3"), "Failed to restore disk. Code: {}, e.displayText() = {}, Stack trace:\n\n{}", e.code(), e.displayText(), e.getStackTraceString());
+
+ throw;
+ }
+}
+
+void DiskS3::restoreFiles(const String & source_bucket, const String & source_path, UInt64 target_revision)
+{
+ LOG_INFO(&Poco::Logger::get("DiskS3"), "Starting restore files for disk {}", name);
+
+ std::vector> results;
+ listObjects(source_bucket, source_path, [this, &source_bucket, &source_path, &target_revision, &results](auto list_result)
+ {
+ std::vector keys;
+ for (const auto & row : list_result.GetContents())
+ {
+ const String & key = row.GetKey();
+
+ /// Skip file operations objects. They will be processed separately.
+ if (key.find("/operations/") != String::npos)
+ continue;
+
+ const auto [revision, _] = extractRevisionAndOperationFromKey(key);
+ /// Filter early if it's possible to get revision from key.
+ if (revision > target_revision)
+ continue;
+
+ keys.push_back(key);
+ }
+
+ if (!keys.empty())
+ {
+ auto result = getExecutor().execute([this, &source_bucket, &source_path, keys]()
+ {
+ processRestoreFiles(source_bucket, source_path, keys);
+ });
+
+ results.push_back(std::move(result));
+ }
+
+ return true;
+ });
+
+ for (auto & result : results)
+ result.wait();
+ for (auto & result : results)
+ result.get();
+
+ LOG_INFO(&Poco::Logger::get("DiskS3"), "Files are restored for disk {}", name);
+}
+
+void DiskS3::processRestoreFiles(const String & source_bucket, const String & source_path, Strings keys)
+{
+ for (const auto & key : keys)
+ {
+ auto head_result = headObject(source_bucket, key);
+ auto object_metadata = head_result.GetMetadata();
+
+ /// Restore file if object has 'path' in metadata.
+ auto path_entry = object_metadata.find("path");
+ if (path_entry == object_metadata.end())
+ throw Exception("Failed to restore key " + key + " because it doesn't have 'path' in metadata", ErrorCodes::S3_ERROR);
+
+ const auto & path = path_entry->second;
+
+ createDirectories(directoryPath(path));
+ auto metadata = createMeta(path);
+ auto relative_key = shrinkKey(source_path, key);
+
+ /// Copy object if we restore to different bucket / path.
+ if (bucket != source_bucket || s3_root_path != source_path)
+ copyObject(source_bucket, key, bucket, s3_root_path + relative_key);
+
+ metadata.addObject(relative_key, head_result.GetContentLength());
+ metadata.save();
+
+ LOG_DEBUG(&Poco::Logger::get("DiskS3"), "Restored file {}", path);
+ }
+}
+
+void DiskS3::restoreFileOperations(const String & source_bucket, const String & source_path, UInt64 target_revision)
+{
+ LOG_INFO(&Poco::Logger::get("DiskS3"), "Starting restore file operations for disk {}", name);
+
+ /// Enable recording file operations if we restore to different bucket / path.
+ send_metadata = bucket != source_bucket || s3_root_path != source_path;
+
+ listObjects(source_bucket, source_path + "operations/", [this, &source_bucket, &target_revision](auto list_result)
+ {
+ const String rename = "rename";
+ const String hardlink = "hardlink";
+
+ for (const auto & row : list_result.GetContents())
+ {
+ const String & key = row.GetKey();
+
+ const auto [revision, operation] = extractRevisionAndOperationFromKey(key);
+ if (revision == UNKNOWN_REVISION)
+ {
+ LOG_WARNING(&Poco::Logger::get("DiskS3"), "Skip key {} with unknown revision", key);
+ continue;
+ }
+
+ /// S3 ensures that keys will be listed in ascending UTF-8 bytes order (revision order).
+ /// We can stop processing if revision of the object is already more than required.
+ if (revision > target_revision)
+ return false;
+
+ /// Keep original revision if restore to different bucket / path.
+ if (send_metadata)
+ revision_counter = revision - 1;
+
+ auto object_metadata = headObject(source_bucket, key).GetMetadata();
+ if (operation == rename)
+ {
+ auto from_path = object_metadata["from_path"];
+ auto to_path = object_metadata["to_path"];
+ if (exists(from_path))
+ {
+ moveFile(from_path, to_path);
+ LOG_DEBUG(&Poco::Logger::get("DiskS3"), "Revision {}. Restored rename {} -> {}", revision, from_path, to_path);
+ }
+ }
+ else if (operation == hardlink)
+ {
+ auto src_path = object_metadata["src_path"];
+ auto dst_path = object_metadata["dst_path"];
+ if (exists(src_path))
+ {
+ createDirectories(directoryPath(dst_path));
+ createHardLink(src_path, dst_path);
+ LOG_DEBUG(&Poco::Logger::get("DiskS3"), "Revision {}. Restored hardlink {} -> {}", revision, src_path, dst_path);
+ }
+ }
+ }
+
+ return true;
+ });
+
+ send_metadata = true;
+
+ LOG_INFO(&Poco::Logger::get("DiskS3"), "File operations restored for disk {}", name);
+}
+
+std::tuple DiskS3::extractRevisionAndOperationFromKey(const String & key)
+{
+ UInt64 revision = UNKNOWN_REVISION;
+ String operation;
+
+ re2::RE2::FullMatch(key, key_regexp, &revision, &operation);
+
+ return {revision, operation};
+}
+
+String DiskS3::shrinkKey(const String & path, const String & key)
+{
+ if (!key.starts_with(path))
+ throw Exception("The key " + key + " prefix mismatch with given " + path, ErrorCodes::LOGICAL_ERROR);
+
+ return key.substr(path.length());
+}
+
+String DiskS3::revisionToString(UInt64 revision)
+{
+ static constexpr size_t max_digits = 19; /// UInt64 max digits in decimal representation.
+
+ /// Align revision number with leading zeroes to have strict lexicographical order of them.
+ auto revision_str = std::to_string(revision);
+ auto digits_to_align = max_digits - revision_str.length();
+ for (size_t i = 0; i < digits_to_align; ++i)
+ revision_str = "0" + revision_str;
+
+ return revision_str;
+}
+
+void DiskS3::onFreeze(const String & path)
+{
+ createDirectories(path);
+ WriteBufferFromFile revision_file_buf(metadata_path + path + "revision.txt", 32);
+ writeIntText(revision_counter.load(), revision_file_buf);
+ revision_file_buf.finalize();
}
}
diff --git a/src/Disks/S3/DiskS3.h b/src/Disks/S3/DiskS3.h
index 3dbd9029fb2..5182ae4801b 100644
--- a/src/Disks/S3/DiskS3.h
+++ b/src/Disks/S3/DiskS3.h
@@ -1,11 +1,16 @@
#pragma once
+#include
#include "Disks/DiskFactory.h"
#include "Disks/Executor.h"
#include "ProxyConfiguration.h"
#include
+#include
+#include
+
#include
+#include
namespace DB
@@ -25,6 +30,7 @@ public:
class AwsS3KeyKeeper;
struct Metadata;
+ struct RestoreInformation;
DiskS3(
String name_,
@@ -36,7 +42,9 @@ public:
size_t min_upload_part_size_,
size_t max_single_part_upload_size_,
size_t min_bytes_for_seek_,
- bool send_metadata_);
+ bool send_metadata_,
+ int thread_pool_size_,
+ int list_object_keys_size_);
const String & getName() const override { return name; }
@@ -74,8 +82,6 @@ public:
void replaceFile(const String & from_path, const String & to_path) override;
- void copyFile(const String & from_path, const String & to_path) override;
-
void listFiles(const String & path, std::vector & file_names) override;
std::unique_ptr readFile(
@@ -105,22 +111,47 @@ public:
void setReadOnly(const String & path) override;
- const String getType() const override { return "s3"; }
+ DiskType::Type getType() const override { return DiskType::Type::S3; }
void shutdown() override;
+ /// Actions performed after disk creation.
+ void startup();
+
+ /// Restore S3 metadata files on file system.
+ void restore();
+
+ /// Dumps current revision counter into file 'revision.txt' at given path.
+ void onFreeze(const String & path) override;
+
private:
bool tryReserve(UInt64 bytes);
void removeMeta(const String & path, AwsS3KeyKeeper & keys);
void removeMetaRecursive(const String & path, AwsS3KeyKeeper & keys);
void removeAws(const AwsS3KeyKeeper & keys);
- std::optional createObjectMetadata(const String & path) const;
Metadata readMeta(const String & path) const;
Metadata createMeta(const String & path) const;
-private:
+ void createFileOperationObject(const String & operation_name, UInt64 revision, const ObjectMetadata & metadata);
+ static String revisionToString(UInt64 revision);
+
+ bool checkObjectExists(const String & prefix);
+ Aws::S3::Model::HeadObjectResult headObject(const String & source_bucket, const String & key);
+ void listObjects(const String & source_bucket, const String & source_path, std::function callback);
+ void copyObject(const String & src_bucket, const String & src_key, const String & dst_bucket, const String & dst_key);
+
+ void readRestoreInformation(RestoreInformation & restore_information);
+ void restoreFiles(const String & source_bucket, const String & source_path, UInt64 target_revision);
+ void processRestoreFiles(const String & source_bucket, const String & source_path, std::vector keys);
+ void restoreFileOperations(const String & source_bucket, const String & source_path, UInt64 target_revision);
+
+ /// Remove 'path' prefix from 'key' to get relative key.
+ /// It's needed to store keys to metadata files in RELATIVE_PATHS version.
+ static String shrinkKey(const String & path, const String & key);
+ std::tuple extractRevisionAndOperationFromKey(const String & key);
+
const String name;
std::shared_ptr client;
std::shared_ptr proxy_configuration;
@@ -135,6 +166,18 @@ private:
UInt64 reserved_bytes = 0;
UInt64 reservation_count = 0;
std::mutex reservation_mutex;
+
+ std::atomic revision_counter;
+ static constexpr UInt64 LATEST_REVISION = (static_cast(1)) << 63;
+ static constexpr UInt64 UNKNOWN_REVISION = 0;
+
+ /// File at path {metadata_path}/restore contains metadata restore information
+ const String restore_file_name = "restore";
+ /// The number of keys listed in one request (1000 is max value)
+ int list_object_keys_size;
+
+ /// Key has format: ../../r{revision}-{operation}
+ const re2::RE2 key_regexp {".*/r(\\d+)-(\\w+).*"};
};
}
diff --git a/src/Disks/S3/registerDiskS3.cpp b/src/Disks/S3/registerDiskS3.cpp
index f9eddebdf88..d094d228bae 100644
--- a/src/Disks/S3/registerDiskS3.cpp
+++ b/src/Disks/S3/registerDiskS3.cpp
@@ -152,7 +152,9 @@ void registerDiskS3(DiskFactory & factory)
context.getSettingsRef().s3_min_upload_part_size,
context.getSettingsRef().s3_max_single_part_upload_size,
config.getUInt64(config_prefix + ".min_bytes_for_seek", 1024 * 1024),
- config.getBool(config_prefix + ".send_object_metadata", false));
+ config.getBool(config_prefix + ".send_metadata", false),
+ config.getInt(config_prefix + ".thread_pool_size", 16),
+ config.getInt(config_prefix + ".list_object_keys_size", 1000));
/// This code is used only to check access to the corresponding disk.
if (!config.getBool(config_prefix + ".skip_access_check", false))
@@ -162,6 +164,9 @@ void registerDiskS3(DiskFactory & factory)
checkRemoveAccess(*s3disk);
}
+ s3disk->restore();
+ s3disk->startup();
+
bool cache_enabled = config.getBool(config_prefix + ".cache_enabled", true);
if (cache_enabled)
diff --git a/src/Functions/CMakeLists.txt b/src/Functions/CMakeLists.txt
index 321aa5e2196..1c3beb2e47d 100644
--- a/src/Functions/CMakeLists.txt
+++ b/src/Functions/CMakeLists.txt
@@ -117,3 +117,6 @@ target_link_libraries(clickhouse_functions PRIVATE clickhouse_functions_array)
if (USE_STATS)
target_link_libraries(clickhouse_functions PRIVATE stats)
endif()
+
+# Signed integer overflow on user-provided data inside boost::geometry - ignore.
+set_source_files_properties("pointInPolygon.cpp" PROPERTIES COMPILE_FLAGS -fno-sanitize=signed-integer-overflow)
diff --git a/src/Functions/DateTimeTransforms.h b/src/Functions/DateTimeTransforms.h
index b55f78e71bd..333b397312d 100644
--- a/src/Functions/DateTimeTransforms.h
+++ b/src/Functions/DateTimeTransforms.h
@@ -704,7 +704,11 @@ struct DateTimeTransformImpl
{
using Op = Transformer;
- const DateLUTImpl & time_zone = extractTimeZoneFromFunctionArguments(arguments, 1, 0);
+ size_t time_zone_argument_position = 1;
+ if constexpr (std::is_same_v)
+ time_zone_argument_position = 2;
+
+ const DateLUTImpl & time_zone = extractTimeZoneFromFunctionArguments(arguments, time_zone_argument_position, 0);
const ColumnPtr source_col = arguments[0].column;
if (const auto * sources = checkAndGetColumn(source_col.get()))
diff --git a/src/Functions/FunctionsConversion.h b/src/Functions/FunctionsConversion.h
index 96e49686526..b95d4ea9790 100644
--- a/src/Functions/FunctionsConversion.h
+++ b/src/Functions/FunctionsConversion.h
@@ -477,6 +477,61 @@ template struct ConvertImpl struct ConvertImpl
: DateTimeTransformImpl {};
+/** Conversion of numeric to DateTime64
+ */
+
+template
+struct ToDateTime64TransformUnsigned
+{
+ static constexpr auto name = "toDateTime64";
+
+ const DateTime64::NativeType scale_multiplier = 1;
+
+ ToDateTime64TransformUnsigned(UInt32 scale = 0)
+ : scale_multiplier(DecimalUtils::scaleMultiplier(scale))
+ {}
+
+ inline NO_SANITIZE_UNDEFINED DateTime64::NativeType execute(FromType from, const DateLUTImpl &) const
+ {
+ from = std::min(time_t(from), time_t(0xFFFFFFFF));
+ return DecimalUtils::decimalFromComponentsWithMultiplier(from, 0, scale_multiplier);
+ }
+};
+template
+struct ToDateTime64TransformSigned
+{
+ static constexpr auto name = "toDateTime64";
+
+ const DateTime64::NativeType scale_multiplier = 1;
+
+ ToDateTime64TransformSigned(UInt32 scale = 0)
+ : scale_multiplier(DecimalUtils::scaleMultiplier(scale))
+ {}
+
+ inline NO_SANITIZE_UNDEFINED DateTime64::NativeType execute(FromType from, const DateLUTImpl &) const
+ {
+ if (from < 0)
+ return 0;
+ from = std::min(time_t(from), time_t(0xFFFFFFFF));
+ return DecimalUtils::decimalFromComponentsWithMultiplier(from, 0, scale_multiplier);
+ }
+};
+
+template struct ConvertImpl
+ : DateTimeTransformImpl> {};
+template struct ConvertImpl
+ : DateTimeTransformImpl> {};
+template struct ConvertImpl
+ : DateTimeTransformImpl> {};
+template struct ConvertImpl
+ : DateTimeTransformImpl> {};
+template struct ConvertImpl
+ : DateTimeTransformImpl> {};
+template struct ConvertImpl
+ : DateTimeTransformImpl> {};
+template struct ConvertImpl
+ : DateTimeTransformImpl> {};
+
/** Conversion of DateTime64 to Date or DateTime: discards fractional part.
*/
template
@@ -1294,7 +1349,12 @@ public:
bool useDefaultImplementationForNulls() const override { return checked_return_type; }
bool useDefaultImplementationForConstants() const override { return true; }
- ColumnNumbers getArgumentsThatAreAlwaysConstant() const override { return {1}; }
+ ColumnNumbers getArgumentsThatAreAlwaysConstant() const override
+ {
+ if constexpr (std::is_same_v)
+ return {2};
+ return {1};
+ }
bool canBeExecutedOnDefaultArguments() const override { return false; }
ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr & result_type, size_t input_rows_count) const override
@@ -2313,7 +2373,7 @@ private:
using LeftDataType = typename Types::LeftType;
using RightDataType = typename Types::RightType;
- if constexpr (IsDataTypeDecimalOrNumber && IsDataTypeDecimalOrNumber)
+ if constexpr (IsDataTypeDecimalOrNumber && IsDataTypeDecimalOrNumber && !std::is_same_v)
{
if (wrapper_cast_type == CastType::accurate)
{
diff --git a/src/Functions/array/arrayCumSum.cpp b/src/Functions/array/arrayCumSum.cpp
index 40c0cd4ade2..96001901a6e 100644
--- a/src/Functions/array/arrayCumSum.cpp
+++ b/src/Functions/array/arrayCumSum.cpp
@@ -45,6 +45,41 @@ struct ArrayCumSumImpl
}
+ template
+ static void NO_SANITIZE_UNDEFINED implConst(
+ size_t size, const IColumn::Offset * __restrict offsets, Dst * __restrict res_values, Src src_value)
+ {
+ size_t pos = 0;
+ for (const auto * end = offsets + size; offsets < end; ++offsets)
+ {
+ auto offset = *offsets;
+ Dst accumulated{};
+ for (; pos < offset; ++pos)
+ {
+ accumulated += src_value;
+ res_values[pos] = accumulated;
+ }
+ }
+ }
+
+ template
+ static void NO_SANITIZE_UNDEFINED implVector(
+ size_t size, const IColumn::Offset * __restrict offsets, Dst * __restrict res_values, const Src * __restrict src_values)
+ {
+ size_t pos = 0;
+ for (const auto * end = offsets + size; offsets < end; ++offsets)
+ {
+ auto offset = *offsets;
+ Dst accumulated{};
+ for (; pos < offset; ++pos)
+ {
+ accumulated += src_values[pos];
+ res_values[pos] = accumulated;
+ }
+ }
+ }
+
+
template
static bool executeType(const ColumnPtr & mapped, const ColumnArray & array, ColumnPtr & res_ptr)
{
@@ -75,19 +110,7 @@ struct ArrayCumSumImpl
typename ColVecResult::Container & res_values = res_nested->getData();
res_values.resize(column_const->size());
-
- size_t pos = 0;
- for (auto offset : offsets)
- {
- // skip empty arrays
- if (pos < offset)
- {
- res_values[pos++] = x; // NOLINT
- for (; pos < offset; ++pos)
- res_values[pos] = res_values[pos - 1] + x;
- }
- }
-
+ implConst(offsets.size(), offsets.data(), res_values.data(), x);
res_ptr = ColumnArray::create(std::move(res_nested), array.getOffsetsPtr());
return true;
}
@@ -103,18 +126,7 @@ struct ArrayCumSumImpl
typename ColVecResult::Container & res_values = res_nested->getData();
res_values.resize(data.size());
-
- size_t pos = 0;
- for (auto offset : offsets)
- {
- // skip empty arrays
- if (pos < offset)
- {
- res_values[pos] = data[pos]; // NOLINT
- for (++pos; pos < offset; ++pos)
- res_values[pos] = res_values[pos - 1] + data[pos];
- }
- }
+ implVector(offsets.size(), offsets.data(), res_values.data(), data.data());
res_ptr = ColumnArray::create(std::move(res_nested), array.getOffsetsPtr());
return true;
diff --git a/src/Functions/array/arrayCumSumNonNegative.cpp b/src/Functions/array/arrayCumSumNonNegative.cpp
index ff0f081d70b..148d4283701 100644
--- a/src/Functions/array/arrayCumSumNonNegative.cpp
+++ b/src/Functions/array/arrayCumSumNonNegative.cpp
@@ -48,6 +48,26 @@ struct ArrayCumSumNonNegativeImpl
}
+ template
+ static void NO_SANITIZE_UNDEFINED implVector(
+ size_t size, const IColumn::Offset * __restrict offsets, Dst * __restrict res_values, const Src * __restrict src_values)
+ {
+ size_t pos = 0;
+ for (const auto * end = offsets + size; offsets < end; ++offsets)
+ {
+ auto offset = *offsets;
+ Dst accumulated{};
+ for (; pos < offset; ++pos)
+ {
+ accumulated += src_values[pos];
+ if (accumulated < 0)
+ accumulated = 0;
+ res_values[pos] = accumulated;
+ }
+ }
+ }
+
+
template
static bool executeType(const ColumnPtr & mapped, const ColumnArray & array, ColumnPtr & res_ptr)
{
@@ -70,26 +90,7 @@ struct ArrayCumSumNonNegativeImpl
typename ColVecResult::Container & res_values = res_nested->getData();
res_values.resize(data.size());
-
- size_t pos = 0;
- Result accum_sum = 0;
- for (auto offset : offsets)
- {
- // skip empty arrays
- if (pos < offset)
- {
- accum_sum = data[pos] > 0 ? data[pos] : Element(0); // NOLINT
- res_values[pos] = accum_sum;
- for (++pos; pos < offset; ++pos)
- {
- accum_sum = accum_sum + data[pos];
- if (accum_sum < 0)
- accum_sum = 0;
-
- res_values[pos] = accum_sum;
- }
- }
- }
+ implVector(offsets.size(), offsets.data(), res_values.data(), data.data());
res_ptr = ColumnArray::create(std::move(res_nested), array.getOffsetsPtr());
return true;
diff --git a/src/Functions/array/mapPopulateSeries.cpp b/src/Functions/array/mapPopulateSeries.cpp
index 46c99dba483..2050e0c28ab 100644
--- a/src/Functions/array/mapPopulateSeries.cpp
+++ b/src/Functions/array/mapPopulateSeries.cpp
@@ -16,6 +16,7 @@ namespace ErrorCodes
extern const int ILLEGAL_COLUMN;
extern const int ILLEGAL_TYPE_OF_ARGUMENT;
extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
+ extern const int TOO_LARGE_ARRAY_SIZE;
}
class FunctionMapPopulateSeries : public IFunction
@@ -188,9 +189,13 @@ private:
}
}
+ static constexpr size_t MAX_ARRAY_SIZE = 1ULL << 30;
+ if (static_cast(max_key - min_key) > MAX_ARRAY_SIZE)
+ throw Exception(ErrorCodes::TOO_LARGE_ARRAY_SIZE, "Too large array size in the result of function {}", getName());
+
/* fill the result arrays */
KeyType key;
- for (key = min_key; key <= max_key; ++key)
+ for (key = min_key;; ++key)
{
to_keys_data.insert(key);
@@ -205,6 +210,8 @@ private:
}
++offset;
+ if (key == max_key)
+ break;
}
to_keys_offsets.push_back(offset);
diff --git a/src/Functions/if.cpp b/src/Functions/if.cpp
index 3be4848f1ff..614bfcf700e 100644
--- a/src/Functions/if.cpp
+++ b/src/Functions/if.cpp
@@ -532,7 +532,7 @@ private:
return nullptr;
}
- ColumnPtr executeTuple(const ColumnsWithTypeAndName & arguments, size_t input_rows_count) const
+ ColumnPtr executeTuple(const ColumnsWithTypeAndName & arguments, const DataTypePtr & result_type, size_t input_rows_count) const
{
/// Calculate function for each corresponding elements of tuples.
@@ -558,6 +558,7 @@ private:
const DataTypeTuple & type1 = static_cast(*arg1.type);
const DataTypeTuple & type2 = static_cast(*arg2.type);
+ const DataTypeTuple & tuple_result = static_cast(*result_type);
ColumnsWithTypeAndName temporary_columns(3);
temporary_columns[0] = arguments[0];
@@ -570,7 +571,7 @@ private:
temporary_columns[1] = {col1_contents[i], type1.getElements()[i], {}};
temporary_columns[2] = {col2_contents[i], type2.getElements()[i], {}};
- tuple_columns[i] = executeImpl(temporary_columns, std::make_shared(), input_rows_count);
+ tuple_columns[i] = executeImpl(temporary_columns, tuple_result.getElements()[i], input_rows_count);
}
return ColumnTuple::create(tuple_columns);
@@ -988,7 +989,7 @@ public:
|| (res = executeTyped(cond_col, arguments, result_type, input_rows_count))
|| (res = executeString(cond_col, arguments, result_type))
|| (res = executeGenericArray(cond_col, arguments, result_type))
- || (res = executeTuple(arguments, input_rows_count))))
+ || (res = executeTuple(arguments, result_type, input_rows_count))))
{
return executeGeneric(cond_col, arguments, input_rows_count);
}
diff --git a/src/Functions/tests/gtest_number_traits.cpp b/src/Functions/tests/gtest_number_traits.cpp
index 7664b4fcbdc..7f25c6cbeb7 100644
--- a/src/Functions/tests/gtest_number_traits.cpp
+++ b/src/Functions/tests/gtest_number_traits.cpp
@@ -258,7 +258,7 @@ TEST(NumberTraits, Others)
ASSERT_EQ(getTypeString(DB::NumberTraits::ResultOfFloatingPointDivision::Type()), "Float64");
ASSERT_EQ(getTypeString(DB::NumberTraits::ResultOfFloatingPointDivision::Type()), "Float64");
ASSERT_EQ(getTypeString(DB::NumberTraits::ResultOfIntegerDivision::Type()), "Int8");
- ASSERT_EQ(getTypeString(DB::NumberTraits::ResultOfModulo::Type()), "Int8");
+ ASSERT_EQ(getTypeString(DB::NumberTraits::ResultOfModulo::Type()), "UInt8");
}
diff --git a/src/IO/BrotliReadBuffer.cpp b/src/IO/BrotliReadBuffer.cpp
index 70d3a76e629..41991ad0516 100644
--- a/src/IO/BrotliReadBuffer.cpp
+++ b/src/IO/BrotliReadBuffer.cpp
@@ -77,7 +77,7 @@ bool BrotliReadBuffer::nextImpl()
if (in->eof())
{
eof = true;
- return working_buffer.size() != 0;
+ return !working_buffer.empty();
}
else
{
diff --git a/src/IO/BufferBase.h b/src/IO/BufferBase.h
index c22dcbecf7b..198441d8bc1 100644
--- a/src/IO/BufferBase.h
+++ b/src/IO/BufferBase.h
@@ -40,6 +40,7 @@ public:
inline Position end() const { return end_pos; }
inline size_t size() const { return size_t(end_pos - begin_pos); }
inline void resize(size_t size) { end_pos = begin_pos + size; }
+ inline bool empty() const { return size() == 0; }
inline void swap(Buffer & other)
{
diff --git a/src/IO/ConcatReadBuffer.h b/src/IO/ConcatReadBuffer.h
index 1df99429e93..c416b0fd892 100644
--- a/src/IO/ConcatReadBuffer.h
+++ b/src/IO/ConcatReadBuffer.h
@@ -25,11 +25,16 @@ protected:
return false;
/// First reading
- if (working_buffer.size() == 0 && (*current)->hasPendingData())
+ if (working_buffer.empty())
{
- working_buffer = Buffer((*current)->position(), (*current)->buffer().end());
- return true;
+ if ((*current)->hasPendingData())
+ {
+ working_buffer = Buffer((*current)->position(), (*current)->buffer().end());
+ return true;
+ }
}
+ else
+ (*current)->position() = position();
if (!(*current)->next())
{
@@ -51,14 +56,12 @@ protected:
}
public:
- ConcatReadBuffer(const ReadBuffers & buffers_) : ReadBuffer(nullptr, 0), buffers(buffers_), current(buffers.begin()) {}
-
- ConcatReadBuffer(ReadBuffer & buf1, ReadBuffer & buf2) : ReadBuffer(nullptr, 0)
+ explicit ConcatReadBuffer(const ReadBuffers & buffers_) : ReadBuffer(nullptr, 0), buffers(buffers_), current(buffers.begin())
{
- buffers.push_back(&buf1);
- buffers.push_back(&buf2);
- current = buffers.begin();
+ assert(!buffers.empty());
}
+
+ ConcatReadBuffer(ReadBuffer & buf1, ReadBuffer & buf2) : ConcatReadBuffer({&buf1, &buf2}) {}
};
}
diff --git a/src/IO/HashingReadBuffer.h b/src/IO/HashingReadBuffer.h
index 9fcd6dc6b41..08b6de69dcb 100644
--- a/src/IO/HashingReadBuffer.h
+++ b/src/IO/HashingReadBuffer.h
@@ -1,10 +1,11 @@
#pragma once
-#include
#include
+#include
namespace DB
{
+
/*
* Calculates the hash from the read data. When reading, the data is read from the nested ReadBuffer.
* Small pieces are copied into its own memory.
@@ -12,14 +13,14 @@ namespace DB
class HashingReadBuffer : public IHashingBuffer
{
public:
- HashingReadBuffer(ReadBuffer & in_, size_t block_size_ = DBMS_DEFAULT_HASHING_BLOCK_SIZE) :
- IHashingBuffer(block_size_), in(in_)
+ explicit HashingReadBuffer(ReadBuffer & in_, size_t block_size_ = DBMS_DEFAULT_HASHING_BLOCK_SIZE)
+ : IHashingBuffer(block_size_), in(in_)
{
working_buffer = in.buffer();
pos = in.position();
/// calculate hash from the data already read
- if (working_buffer.size())
+ if (!working_buffer.empty())
{
calculateHash(pos, working_buffer.end() - pos);
}
@@ -39,7 +40,7 @@ private:
return res;
}
-private:
ReadBuffer & in;
};
+
}
diff --git a/src/IO/LZMAInflatingReadBuffer.cpp b/src/IO/LZMAInflatingReadBuffer.cpp
index e30e8df5f9d..6a0a7e5ee31 100644
--- a/src/IO/LZMAInflatingReadBuffer.cpp
+++ b/src/IO/LZMAInflatingReadBuffer.cpp
@@ -66,7 +66,7 @@ bool LZMAInflatingReadBuffer::nextImpl()
if (in->eof())
{
eof = true;
- return working_buffer.size() != 0;
+ return !working_buffer.empty();
}
else
{
diff --git a/src/IO/LimitReadBuffer.cpp b/src/IO/LimitReadBuffer.cpp
index f36facfdd99..baa9e487688 100644
--- a/src/IO/LimitReadBuffer.cpp
+++ b/src/IO/LimitReadBuffer.cpp
@@ -1,4 +1,5 @@
#include
+
#include
@@ -13,6 +14,8 @@ namespace ErrorCodes
bool LimitReadBuffer::nextImpl()
{
+ assert(position() >= in.position());
+
/// Let underlying buffer calculate read bytes in `next()` call.
in.position() = position();
@@ -25,7 +28,10 @@ bool LimitReadBuffer::nextImpl()
}
if (!in.next())
+ {
+ working_buffer = in.buffer();
return false;
+ }
working_buffer = in.buffer();
@@ -50,7 +56,7 @@ LimitReadBuffer::LimitReadBuffer(ReadBuffer & in_, UInt64 limit_, bool throw_exc
LimitReadBuffer::~LimitReadBuffer()
{
/// Update underlying buffer's position in case when limit wasn't reached.
- if (working_buffer.size() != 0)
+ if (!working_buffer.empty())
in.position() = position();
}
diff --git a/src/IO/MemoryReadWriteBuffer.cpp b/src/IO/MemoryReadWriteBuffer.cpp
index 0b0d9704de6..69bcd52a8d2 100644
--- a/src/IO/MemoryReadWriteBuffer.cpp
+++ b/src/IO/MemoryReadWriteBuffer.cpp
@@ -61,7 +61,7 @@ private:
position() = nullptr;
}
- return buffer().size() != 0;
+ return !buffer().empty();
}
using Container = std::forward_list;
diff --git a/src/IO/ReadBuffer.h b/src/IO/ReadBuffer.h
index 3d6eb6970ce..5cbe04f8348 100644
--- a/src/IO/ReadBuffer.h
+++ b/src/IO/ReadBuffer.h
@@ -55,13 +55,19 @@ public:
*/
bool next()
{
+ assert(!hasPendingData());
+ assert(position() <= working_buffer.end());
+
bytes += offset();
bool res = nextImpl();
if (!res)
- working_buffer.resize(0);
-
- pos = working_buffer.begin() + nextimpl_working_buffer_offset;
+ working_buffer = Buffer(pos, pos);
+ else
+ pos = working_buffer.begin() + nextimpl_working_buffer_offset;
nextimpl_working_buffer_offset = 0;
+
+ assert(position() <= working_buffer.end());
+
return res;
}
@@ -72,7 +78,7 @@ public:
next();
}
- virtual ~ReadBuffer() {}
+ virtual ~ReadBuffer() = default;
/** Unlike std::istream, it returns true if all data was read
@@ -192,7 +198,7 @@ private:
*/
virtual bool nextImpl() { return false; }
- [[noreturn]] void throwReadAfterEOF()
+ [[noreturn]] static void throwReadAfterEOF()
{
throw Exception("Attempt to read after eof", ErrorCodes::ATTEMPT_TO_READ_AFTER_EOF);
}
diff --git a/src/IO/ReadBufferFromFileDescriptor.cpp b/src/IO/ReadBufferFromFileDescriptor.cpp
index 0ab07b85027..dd5d9e67cd7 100644
--- a/src/IO/ReadBufferFromFileDescriptor.cpp
+++ b/src/IO/ReadBufferFromFileDescriptor.cpp
@@ -90,6 +90,7 @@ bool ReadBufferFromFileDescriptor::nextImpl()
if (bytes_read)
{
ProfileEvents::increment(ProfileEvents::ReadBufferFromFileDescriptorReadBytes, bytes_read);
+ working_buffer = internal_buffer;
working_buffer.resize(bytes_read);
}
else
diff --git a/src/IO/ReadWriteBufferFromHTTP.h b/src/IO/ReadWriteBufferFromHTTP.h
index de10f268dc3..9cd37bd00f8 100644
--- a/src/IO/ReadWriteBufferFromHTTP.h
+++ b/src/IO/ReadWriteBufferFromHTTP.h
@@ -76,9 +76,7 @@ public:
}
}
- virtual ~UpdatableSessionBase()
- {
- }
+ virtual ~UpdatableSessionBase() = default;
};
@@ -205,6 +203,8 @@ namespace detail
{
if (next_callback)
next_callback(count());
+ if (!working_buffer.empty())
+ impl->position() = position();
if (!impl->next())
return false;
internal_buffer = impl->buffer();
diff --git a/src/IO/SeekableReadBuffer.h b/src/IO/SeekableReadBuffer.h
index f7a468b0490..f8e6d817fb1 100644
--- a/src/IO/SeekableReadBuffer.h
+++ b/src/IO/SeekableReadBuffer.h
@@ -21,6 +21,12 @@ public:
*/
virtual off_t seek(off_t off, int whence) = 0;
+ /**
+ * Keep in mind that seekable buffer may encounter eof() once and the working buffer
+ * may get into inconsistent state. Don't forget to reset it on the first nextImpl()
+ * after seek().
+ */
+
/**
* @return Offset from the begin of the underlying buffer / file corresponds to the buffer current position.
*/
diff --git a/src/IO/WriteBuffer.h b/src/IO/WriteBuffer.h
index 6abcc1c8eed..d425f813d7b 100644
--- a/src/IO/WriteBuffer.h
+++ b/src/IO/WriteBuffer.h
@@ -61,7 +61,7 @@ public:
/** it is desirable in the derived classes to place the next() call in the destructor,
* so that the last data is written
*/
- virtual ~WriteBuffer() {}
+ virtual ~WriteBuffer() = default;
inline void nextIfAtEnd()
{
@@ -75,7 +75,7 @@ public:
size_t bytes_copied = 0;
/// Produces endless loop
- assert(working_buffer.size() > 0);
+ assert(!working_buffer.empty());
while (bytes_copied < n)
{
diff --git a/src/IO/WriteHelpers.h b/src/IO/WriteHelpers.h
index 9072f306bd9..a37a5b5ddc6 100644
--- a/src/IO/WriteHelpers.h
+++ b/src/IO/WriteHelpers.h
@@ -910,6 +910,7 @@ inline void writeBinary(const StringRef & x, WriteBuffer & buf) { writeStringBin
inline void writeBinary(const std::string_view & x, WriteBuffer & buf) { writeStringBinary(x, buf); }
inline void writeBinary(const Int128 & x, WriteBuffer & buf) { writePODBinary(x, buf); }
inline void writeBinary(const UInt128 & x, WriteBuffer & buf) { writePODBinary(x, buf); }
+inline void writeBinary(const UUID & x, WriteBuffer & buf) { writePODBinary(x, buf); }
inline void writeBinary(const DummyUInt256 & x, WriteBuffer & buf) { writePODBinary(x, buf); }
inline void writeBinary(const Decimal32 & x, WriteBuffer & buf) { writePODBinary(x, buf); }
inline void writeBinary(const Decimal64 & x, WriteBuffer & buf) { writePODBinary(x, buf); }
diff --git a/src/IO/ZlibInflatingReadBuffer.cpp b/src/IO/ZlibInflatingReadBuffer.cpp
index 0b23bef1b10..bea83c74e21 100644
--- a/src/IO/ZlibInflatingReadBuffer.cpp
+++ b/src/IO/ZlibInflatingReadBuffer.cpp
@@ -70,7 +70,7 @@ bool ZlibInflatingReadBuffer::nextImpl()
if (in->eof())
{
eof = true;
- return working_buffer.size() != 0;
+ return !working_buffer.empty();
}
else
{
diff --git a/src/IO/ZstdInflatingReadBuffer.cpp b/src/IO/ZstdInflatingReadBuffer.cpp
index 94a0b56fc6d..b441a6a7210 100644
--- a/src/IO/ZstdInflatingReadBuffer.cpp
+++ b/src/IO/ZstdInflatingReadBuffer.cpp
@@ -54,7 +54,7 @@ bool ZstdInflatingReadBuffer::nextImpl()
if (in->eof())
{
eof = true;
- return working_buffer.size() != 0;
+ return !working_buffer.empty();
}
return true;
diff --git a/src/Interpreters/ActionsDAG.cpp b/src/Interpreters/ActionsDAG.cpp
index d8c40ffda2f..becd3f4f4a2 100644
--- a/src/Interpreters/ActionsDAG.cpp
+++ b/src/Interpreters/ActionsDAG.cpp
@@ -454,36 +454,42 @@ bool ActionsDAG::tryRestoreColumn(const std::string & column_name)
return false;
}
-void ActionsDAG::removeUnusedInput(const std::string & column_name)
+bool ActionsDAG::removeUnusedResult(const std::string & column_name)
{
+ /// Find column in index and remove.
+ const Node * col;
+ {
+ auto it = index.begin();
+ for (; it != index.end(); ++it)
+ if ((*it)->result_name == column_name)
+ break;
+
+ if (it == index.end())
+ throw Exception(ErrorCodes::LOGICAL_ERROR, "Not found result {} in ActionsDAG\n{}", column_name, dumpDAG());
+
+ col = *it;
+ index.remove(it);
+ }
+
+ /// Check if column is in input.
auto it = inputs.begin();
for (; it != inputs.end(); ++it)
- if ((*it)->result_name == column_name)
+ if (*it == col)
break;
if (it == inputs.end())
- throw Exception(ErrorCodes::LOGICAL_ERROR, "Not found input {} in ActionsDAG\n{}", column_name, dumpDAG());
+ return false;
- auto * input = *it;
+ /// Check column has no dependent.
for (const auto & node : nodes)
for (const auto * child : node.children)
- if (input == child)
- throw Exception(ErrorCodes::LOGICAL_ERROR,
- "Cannot remove input {} because it has dependent nodes in ActionsDAG\n{}",
- column_name, dumpDAG());
-
- for (auto jt = index.begin(); jt != index.end(); ++jt)
- {
- if (*jt == input)
- {
- index.remove(jt);
- break;
- }
- }
+ if (col == child)
+ return false;
+ /// Remove from nodes and inputs.
for (auto jt = nodes.begin(); jt != nodes.end(); ++jt)
{
- if (&(*jt) == input)
+ if (&(*jt) == *it)
{
nodes.erase(jt);
break;
@@ -491,6 +497,7 @@ void ActionsDAG::removeUnusedInput(const std::string & column_name)
}
inputs.erase(it);
+ return true;
}
ActionsDAGPtr ActionsDAG::clone() const
@@ -844,7 +851,7 @@ ActionsDAGPtr ActionsDAG::merge(ActionsDAG && first, ActionsDAG && second)
return std::make_shared(std::move(first));
}
-std::pair ActionsDAG::split(std::unordered_set split_nodes) const
+ActionsDAG::SplitResult ActionsDAG::split(std::unordered_set split_nodes) const
{
/// Split DAG into two parts.
/// (first_nodes, first_index) is a part which will have split_list in result.
@@ -1045,7 +1052,7 @@ std::pair ActionsDAG::split(std::unordered_set ActionsDAG::splitActionsBeforeArrayJoin(const NameSet & array_joined_columns) const
+ActionsDAG::SplitResult ActionsDAG::splitActionsBeforeArrayJoin(const NameSet & array_joined_columns) const
{
struct Frame
@@ -1113,7 +1120,7 @@ std::pair ActionsDAG::splitActionsBeforeArrayJoin
return res;
}
-std::pair ActionsDAG::splitActionsForFilter(const std::string & column_name) const
+ActionsDAG::SplitResult ActionsDAG::splitActionsForFilter(const std::string & column_name) const
{
auto it = index.begin();
for (; it != index.end(); ++it)
diff --git a/src/Interpreters/ActionsDAG.h b/src/Interpreters/ActionsDAG.h
index b12da30e24f..fa5ae2ac83f 100644
--- a/src/Interpreters/ActionsDAG.h
+++ b/src/Interpreters/ActionsDAG.h
@@ -214,9 +214,10 @@ public:
/// If column is not in index, try to find it in nodes and insert back into index.
bool tryRestoreColumn(const std::string & column_name);
- /// Find column in input. Remove it from input and index.
- /// Checks that column in inputs and has not dependent nodes.
- void removeUnusedInput(const std::string & column_name);
+ /// Find column in result. Remove it from index.
+ /// If columns is in inputs and has no dependent nodes, remove it from inputs too.
+ /// Return true if column was removed from inputs.
+ bool removeUnusedResult(const std::string & column_name);
void projectInput() { settings.project_input = true; }
void removeUnusedActions(const Names & required_names);
@@ -255,18 +256,20 @@ public:
/// Otherwise, any two actions may be combined.
static ActionsDAGPtr merge(ActionsDAG && first, ActionsDAG && second);
+ using SplitResult = std::pair;
+
/// Split ActionsDAG into two DAGs, where first part contains all nodes from split_nodes and their children.
/// Execution of first then second parts on block is equivalent to execution of initial DAG.
/// First DAG and initial DAG have equal inputs, second DAG and initial DAG has equal index (outputs).
/// Second DAG inputs may contain less inputs then first DAG (but also include other columns).
- std::pair split(std::unordered_set split_nodes) const;
+ SplitResult split(std::unordered_set split_nodes) const;
/// Splits actions into two parts. Returned first half may be swapped with ARRAY JOIN.
- std::pair splitActionsBeforeArrayJoin(const NameSet & array_joined_columns) const;
+ SplitResult splitActionsBeforeArrayJoin(const NameSet & array_joined_columns) const;
/// Splits actions into two parts. First part has minimal size sufficient for calculation of column_name.
/// Index of initial actions must contain column_name.
- std::pair splitActionsForFilter(const std::string & column_name) const;
+ SplitResult splitActionsForFilter(const std::string & column_name) const;
private:
Node & addNode(Node node, bool can_replace = false);
diff --git a/src/Interpreters/Context.cpp b/src/Interpreters/Context.cpp
index 8ff317764a7..9a1fcf6a067 100644
--- a/src/Interpreters/Context.cpp
+++ b/src/Interpreters/Context.cpp
@@ -64,6 +64,7 @@
#include
#include
#include
+#include
namespace ProfileEvents
@@ -2510,4 +2511,22 @@ StorageID Context::resolveStorageIDImpl(StorageID storage_id, StorageNamespace w
return StorageID::createEmpty();
}
+PartUUIDsPtr Context::getPartUUIDs()
+{
+ auto lock = getLock();
+ if (!part_uuids)
+ part_uuids = std::make_shared();
+
+ return part_uuids;
+}
+
+PartUUIDsPtr Context::getIgnoredPartUUIDs()
+{
+ auto lock = getLock();
+ if (!ignored_part_uuids)
+ ignored_part_uuids = std::make_shared();
+
+ return ignored_part_uuids;
+}
+
}
diff --git a/src/Interpreters/Context.h b/src/Interpreters/Context.h
index 5801cc2b949..ea9ea172d3f 100644
--- a/src/Interpreters/Context.h
+++ b/src/Interpreters/Context.h
@@ -107,6 +107,8 @@ using StoragePolicyPtr = std::shared_ptr;
using StoragePoliciesMap = std::map;
class StoragePolicySelector;
using StoragePolicySelectorPtr = std::shared_ptr;
+struct PartUUIDs;
+using PartUUIDsPtr = std::shared_ptr;
class IOutputFormat;
using OutputFormatPtr = std::shared_ptr;
@@ -264,6 +266,9 @@ private:
using SampleBlockCache = std::unordered_map;
mutable SampleBlockCache sample_block_cache;
+ PartUUIDsPtr part_uuids; /// set of parts' uuids, is used for query parts deduplication
+ PartUUIDsPtr ignored_part_uuids; /// set of parts' uuids are meant to be excluded from query processing
+
NameToNameMap query_parameters; /// Dictionary with query parameters for prepared statements.
/// (key=name, value)
@@ -734,6 +739,9 @@ public:
};
MySQLWireContext mysql;
+
+ PartUUIDsPtr getPartUUIDs();
+ PartUUIDsPtr getIgnoredPartUUIDs();
private:
std::unique_lock getLock() const;
diff --git a/src/Interpreters/InterpreterSelectQuery.cpp b/src/Interpreters/InterpreterSelectQuery.cpp
index 2ee1b3956e4..4b89273cd86 100644
--- a/src/Interpreters/InterpreterSelectQuery.cpp
+++ b/src/Interpreters/InterpreterSelectQuery.cpp
@@ -69,7 +69,6 @@
#include
#include
-#include
#include
#include
#include
@@ -390,13 +389,18 @@ InterpreterSelectQuery::InterpreterSelectQuery(
if (try_move_to_prewhere && storage && !row_policy_filter && query.where() && !query.prewhere() && !query.final())
{
/// PREWHERE optimization: transfer some condition from WHERE to PREWHERE if enabled and viable
- if (const auto * merge_tree = dynamic_cast(storage.get()))
+ if (const auto & column_sizes = storage->getColumnSizes(); !column_sizes.empty())
{
+ /// Extract column compressed sizes.
+ std::unordered_map column_compressed_sizes;
+ for (const auto & [name, sizes] : column_sizes)
+ column_compressed_sizes[name] = sizes.data_compressed;
+
SelectQueryInfo current_info;
current_info.query = query_ptr;
current_info.syntax_analyzer_result = syntax_analyzer_result;
- MergeTreeWhereOptimizer{current_info, *context, *merge_tree, metadata_snapshot, syntax_analyzer_result->requiredSourceColumns(), log};
+ MergeTreeWhereOptimizer{current_info, *context, std::move(column_compressed_sizes), metadata_snapshot, syntax_analyzer_result->requiredSourceColumns(), log};
}
}
diff --git a/src/Interpreters/MarkTableIdentifiersVisitor.cpp b/src/Interpreters/MarkTableIdentifiersVisitor.cpp
index 78563059ed1..6557e1b5292 100644
--- a/src/Interpreters/MarkTableIdentifiersVisitor.cpp
+++ b/src/Interpreters/MarkTableIdentifiersVisitor.cpp
@@ -47,7 +47,7 @@ void MarkTableIdentifiersMatcher::visit(const ASTFunction & func, ASTPtr &, Data
// First argument of dictGet can be a dictionary name, perhaps with a database.
if (functionIsJoinGet(func.name) || functionIsDictGet(func.name))
{
- if (func.arguments->children.empty())
+ if (!func.arguments || func.arguments->children.empty())
{
return;
}
diff --git a/src/Interpreters/RewriteSumIfFunctionVisitor.cpp b/src/Interpreters/RewriteSumIfFunctionVisitor.cpp
index 2fb0765db13..2593c220c63 100644
--- a/src/Interpreters/RewriteSumIfFunctionVisitor.cpp
+++ b/src/Interpreters/RewriteSumIfFunctionVisitor.cpp
@@ -13,18 +13,6 @@ void RewriteSumIfFunctionMatcher::visit(ASTPtr & ast, Data & data)
visit(*func, ast, data);
}
-static ASTPtr createNewFunctionWithOneArgument(const String & func_name, const ASTPtr & argument)
-{
- auto new_func = std::make_shared();
- new_func->name = func_name;
-
- auto new_arguments = std::make_shared();
- new_arguments->children.push_back(argument);
- new_func->arguments = new_arguments;
- new_func->children.push_back(new_arguments);
- return new_func;
-}
-
void RewriteSumIfFunctionMatcher::visit(const ASTFunction & func, ASTPtr & ast, Data &)
{
if (!func.arguments || func.arguments->children.empty())
@@ -46,7 +34,7 @@ void RewriteSumIfFunctionMatcher::visit(const ASTFunction & func, ASTPtr & ast,
if (func_arguments.size() == 2 && literal->value.get() == 1)
{
- auto new_func = createNewFunctionWithOneArgument("countIf", func_arguments[1]);
+ auto new_func = makeASTFunction("countIf", func_arguments[1]);
new_func->setAlias(func.alias);
ast = std::move(new_func);
return;
@@ -74,7 +62,7 @@ void RewriteSumIfFunctionMatcher::visit(const ASTFunction & func, ASTPtr & ast,
/// sum(if(cond, 1, 0)) -> countIf(cond)
if (first_value == 1 && second_value == 0)
{
- auto new_func = createNewFunctionWithOneArgument("countIf", if_arguments[0]);
+ auto new_func = makeASTFunction("countIf", if_arguments[0]);
new_func->setAlias(func.alias);
ast = std::move(new_func);
return;
@@ -82,8 +70,8 @@ void RewriteSumIfFunctionMatcher::visit(const ASTFunction & func, ASTPtr & ast,
/// sum(if(cond, 0, 1)) -> countIf(not(cond))
if (first_value == 0 && second_value == 1)
{
- auto not_func = createNewFunctionWithOneArgument("not", if_arguments[0]);
- auto new_func = createNewFunctionWithOneArgument("countIf", not_func);
+ auto not_func = makeASTFunction("not", if_arguments[0]);
+ auto new_func = makeASTFunction("countIf", not_func);
new_func->setAlias(func.alias);
ast = std::move(new_func);
return;
diff --git a/src/Interpreters/WindowDescription.cpp b/src/Interpreters/WindowDescription.cpp
index bfb53ebb79f..6e72f056b16 100644
--- a/src/Interpreters/WindowDescription.cpp
+++ b/src/Interpreters/WindowDescription.cpp
@@ -6,6 +6,11 @@
namespace DB
{
+namespace ErrorCodes
+{
+ extern const int BAD_ARGUMENTS;
+}
+
std::string WindowFunctionDescription::dump() const
{
WriteBufferFromOwnString ss;
@@ -33,4 +38,95 @@ std::string WindowDescription::dump() const
return ss.str();
}
+std::string WindowFrame::toString() const
+{
+ WriteBufferFromOwnString buf;
+ toString(buf);
+ return buf.str();
+}
+
+void WindowFrame::toString(WriteBuffer & buf) const
+{
+ buf << toString(type) << " BETWEEN ";
+ if (begin_type == BoundaryType::Current)
+ {
+ buf << "CURRENT ROW";
+ }
+ else if (begin_type == BoundaryType::Unbounded)
+ {
+ buf << "UNBOUNDED PRECEDING";
+ }
+ else
+ {
+ buf << abs(begin_offset);
+ buf << " "
+ << (begin_offset > 0 ? "FOLLOWING" : "PRECEDING");
+ }
+ buf << " AND ";
+ if (end_type == BoundaryType::Current)
+ {
+ buf << "CURRENT ROW";
+ }
+ else if (end_type == BoundaryType::Unbounded)
+ {
+ buf << "UNBOUNDED PRECEDING";
+ }
+ else
+ {
+ buf << abs(end_offset);
+ buf << " "
+ << (end_offset > 0 ? "FOLLOWING" : "PRECEDING");
+ }
+}
+
+void WindowFrame::checkValid() const
+{
+ if (begin_type == BoundaryType::Unbounded
+ || end_type == BoundaryType::Unbounded)
+ {
+ return;
+ }
+
+ if (begin_type == BoundaryType::Current
+ && end_type == BoundaryType::Offset
+ && end_offset > 0)
+ {
+ return;
+ }
+
+ if (end_type == BoundaryType::Current
+ && begin_type == BoundaryType::Offset
+ && begin_offset < 0)
+ {
+ return;
+ }
+
+ if (end_type == BoundaryType::Current
+ && begin_type == BoundaryType::Current)
+ {
+ // BETWEEN CURRENT ROW AND CURRENT ROW makes some sense for RANGE or
+ // GROUP frames, and is technically valid for ROWS frame.
+ return;
+ }
+
+ if (end_type == BoundaryType::Offset
+ && begin_type == BoundaryType::Offset)
+ {
+ if (type == FrameType::Rows)
+ {
+ if (end_offset >= begin_offset)
+ {
+ return;
+ }
+ }
+
+ // For RANGE and GROUPS, we must check that end follows begin if sorted
+ // according to ORDER BY (we don't support them yet).
+ }
+
+ throw Exception(ErrorCodes::BAD_ARGUMENTS,
+ "Window frame '{}' is invalid",
+ toString());
+}
+
}
diff --git a/src/Interpreters/WindowDescription.h b/src/Interpreters/WindowDescription.h
index d34b7721a5e..447352f7a83 100644
--- a/src/Interpreters/WindowDescription.h
+++ b/src/Interpreters/WindowDescription.h
@@ -53,6 +53,13 @@ struct WindowFrame
int64_t end_offset = 0;
+ // Throws BAD_ARGUMENTS exception if the frame definition is incorrect, e.g.
+ // the frame start comes later than the frame end.
+ void checkValid() const;
+
+ std::string toString() const;
+ void toString(WriteBuffer & buf) const;
+
bool operator == (const WindowFrame & other) const
{
// We don't compare is_default because it's not a real property of the
diff --git a/src/Interpreters/ya.make b/src/Interpreters/ya.make
index 1cadc447e59..6a155749ddf 100644
--- a/src/Interpreters/ya.make
+++ b/src/Interpreters/ya.make
@@ -145,6 +145,7 @@ SRCS(
TranslateQualifiedNamesVisitor.cpp
TreeOptimizer.cpp
TreeRewriter.cpp
+ WindowDescription.cpp
addMissingDefaults.cpp
addTypeConversionToAST.cpp
castColumn.cpp
diff --git a/src/Parsers/ExpressionElementParsers.cpp b/src/Parsers/ExpressionElementParsers.cpp
index 358c86e166b..3f4403bc264 100644
--- a/src/Parsers/ExpressionElementParsers.cpp
+++ b/src/Parsers/ExpressionElementParsers.cpp
@@ -46,6 +46,7 @@ namespace DB
namespace ErrorCodes
{
+ extern const int BAD_ARGUMENTS;
extern const int SYNTAX_ERROR;
extern const int LOGICAL_ERROR;
extern const int NOT_IMPLEMENTED;
@@ -558,7 +559,24 @@ static bool tryParseFrameDefinition(ASTWindowDefinition * node, IParser::Pos & p
}
else if (parser_literal.parse(pos, ast_literal, expected))
{
- node->frame.begin_offset = ast_literal->as().value.safeGet();
+ const Field & value = ast_literal->as().value;
+ if (!isInt64FieldType(value.getType()))
+ {
+ throw Exception(ErrorCodes::BAD_ARGUMENTS,
+ "Only integer frame offsets are supported, '{}' is not supported.",
+ Field::Types::toString(value.getType()));
+ }
+ node->frame.begin_offset = value.get();
+ node->frame.begin_type = WindowFrame::BoundaryType::Offset;
+ // We can easily get a UINT64_MAX here, which doesn't even fit into
+ // int64_t. Not sure what checks we are going to need here after we
+ // support floats and dates.
+ if (node->frame.begin_offset > INT_MAX || node->frame.begin_offset < INT_MIN)
+ {
+ throw Exception(ErrorCodes::BAD_ARGUMENTS,
+ "Frame offset must be between {} and {}, but {} is given",
+ INT_MAX, INT_MIN, node->frame.begin_offset);
+ }
}
else
{
@@ -567,7 +585,7 @@ static bool tryParseFrameDefinition(ASTWindowDefinition * node, IParser::Pos & p
if (keyword_preceding.ignore(pos, expected))
{
- node->frame.begin_offset = - node->frame.begin_offset;
+ node->frame.begin_offset = -node->frame.begin_offset;
}
else if (keyword_following.ignore(pos, expected))
{
@@ -604,7 +622,22 @@ static bool tryParseFrameDefinition(ASTWindowDefinition * node, IParser::Pos & p
}
else if (parser_literal.parse(pos, ast_literal, expected))
{
- node->frame.end_offset = ast_literal->as().value.safeGet();
+ const Field & value = ast_literal->as().value;
+ if (!isInt64FieldType(value.getType()))
+ {
+ throw Exception(ErrorCodes::BAD_ARGUMENTS,
+ "Only integer frame offsets are supported, '{}' is not supported.",
+ Field::Types::toString(value.getType()));
+ }
+ node->frame.end_offset = value.get();
+ node->frame.end_type = WindowFrame::BoundaryType::Offset;
+
+ if (node->frame.end_offset > INT_MAX || node->frame.end_offset < INT_MIN)
+ {
+ throw Exception(ErrorCodes::BAD_ARGUMENTS,
+ "Frame offset must be between {} and {}, but {} is given",
+ INT_MAX, INT_MIN, node->frame.end_offset);
+ }
}
else
{
@@ -623,6 +656,7 @@ static bool tryParseFrameDefinition(ASTWindowDefinition * node, IParser::Pos & p
}
else if (keyword_following.ignore(pos, expected))
{
+ // Positive offset or UNBOUNDED FOLLOWING.
}
else
{
diff --git a/src/Parsers/New/CMakeLists.txt b/src/Parsers/New/CMakeLists.txt
index 360dd4d7488..468394b7bd8 100644
--- a/src/Parsers/New/CMakeLists.txt
+++ b/src/Parsers/New/CMakeLists.txt
@@ -65,8 +65,6 @@ target_compile_options (clickhouse_parsers_new
-Wno-documentation-deprecated-sync
-Wno-shadow-field
-Wno-unused-parameter
-
- PUBLIC
-Wno-extra-semi
-Wno-inconsistent-missing-destructor-override
)
diff --git a/src/Parsers/ParserDataType.cpp b/src/Parsers/ParserDataType.cpp
index 3d3f393a300..dd495fe6d53 100644
--- a/src/Parsers/ParserDataType.cpp
+++ b/src/Parsers/ParserDataType.cpp
@@ -32,8 +32,10 @@ private:
const char * operators[] = {"=", "equals", nullptr};
ParserLeftAssociativeBinaryOperatorList enum_parser(operators, std::make_unique());
- return nested_parser.parse(pos, node, expected)
- || enum_parser.parse(pos, node, expected)
+ if (pos->type == TokenType::BareWord && std::string_view(pos->begin, pos->size()) == "Nested")
+ return nested_parser.parse(pos, node, expected);
+
+ return enum_parser.parse(pos, node, expected)
|| literal_parser.parse(pos, node, expected)
|| data_type_parser.parse(pos, node, expected);
}
diff --git a/src/Parsers/ParserInsertQuery.h b/src/Parsers/ParserInsertQuery.h
index b6a199c9d71..f98e433551d 100644
--- a/src/Parsers/ParserInsertQuery.h
+++ b/src/Parsers/ParserInsertQuery.h
@@ -30,7 +30,7 @@ private:
const char * getName() const override { return "INSERT query"; }
bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
public:
- ParserInsertQuery(const char * end_) : end(end_) {}
+ explicit ParserInsertQuery(const char * end_) : end(end_) {}
};
/** Insert accepts an identifier and an asterisk with variants.
diff --git a/src/Processors/QueryPlan/Optimizations/splitFilter.cpp b/src/Processors/QueryPlan/Optimizations/splitFilter.cpp
index 38ba8f25b24..8c212936195 100644
--- a/src/Processors/QueryPlan/Optimizations/splitFilter.cpp
+++ b/src/Processors/QueryPlan/Optimizations/splitFilter.cpp
@@ -24,8 +24,9 @@ size_t trySplitFilter(QueryPlan::Node * node, QueryPlan::Nodes & nodes)
if (split.second->trivial())
return 0;
+ bool remove_filter = false;
if (filter_step->removesFilterColumn())
- split.second->removeUnusedInput(filter_step->getFilterColumnName());
+ remove_filter = split.second->removeUnusedResult(filter_step->getFilterColumnName());
auto description = filter_step->getStepDescription();
@@ -37,7 +38,7 @@ size_t trySplitFilter(QueryPlan::Node * node, QueryPlan::Nodes & nodes)
filter_node.children.at(0)->step->getOutputStream(),
std::move(split.first),
filter_step->getFilterColumnName(),
- filter_step->removesFilterColumn());
+ remove_filter);
node->step = std::make_unique(filter_node.step->getOutputStream(), std::move(split.second));
diff --git a/src/Processors/QueryPlan/WindowStep.cpp b/src/Processors/QueryPlan/WindowStep.cpp
index 82c589b8b20..1a71ca0adc7 100644
--- a/src/Processors/QueryPlan/WindowStep.cpp
+++ b/src/Processors/QueryPlan/WindowStep.cpp
@@ -57,6 +57,7 @@ WindowStep::WindowStep(const DataStream & input_stream_,
{
// We don't remove any columns, only add, so probably we don't have to update
// the output DataStream::distinct_columns.
+ window_description.frame.checkValid();
}
void WindowStep::transformPipeline(QueryPipeline & pipeline)
diff --git a/src/Processors/Transforms/WindowTransform.cpp b/src/Processors/Transforms/WindowTransform.cpp
index fe55fe6bcad..474d1a3c452 100644
--- a/src/Processors/Transforms/WindowTransform.cpp
+++ b/src/Processors/Transforms/WindowTransform.cpp
@@ -165,16 +165,197 @@ void WindowTransform::advancePartitionEnd()
assert(!partition_ended && partition_end == blocksEnd());
}
-void WindowTransform::advanceFrameStart() const
+auto WindowTransform::moveRowNumberNoCheck(const RowNumber & _x, int offset) const
{
- // Frame start is always UNBOUNDED PRECEDING for now, so we don't have to
- // move it. It is initialized when the new partition starts.
- if (window_description.frame.begin_type
- != WindowFrame::BoundaryType::Unbounded)
+ RowNumber x = _x;
+
+ if (offset > 0)
{
- throw Exception(ErrorCodes::NOT_IMPLEMENTED,
- "Frame start type '{}' is not implemented",
- WindowFrame::toString(window_description.frame.begin_type));
+ for (;;)
+ {
+ assertValid(x);
+ assert(offset >= 0);
+
+ const auto block_rows = blockRowsNumber(x);
+ x.row += offset;
+ if (x.row >= block_rows)
+ {
+ offset = x.row - block_rows;
+ x.row = 0;
+ x.block++;
+
+ if (x == blocksEnd())
+ {
+ break;
+ }
+ }
+ else
+ {
+ offset = 0;
+ break;
+ }
+ }
+ }
+ else if (offset < 0)
+ {
+ for (;;)
+ {
+ assertValid(x);
+ assert(offset <= 0);
+
+ if (x.row >= static_cast