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# Release 383 (1 June 2022) | ||
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## General | ||
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* Introduce `json_exists`, `json_query`, and `json_value` [JSON functions](/functions/json). ({issue}`9081`) | ||
* Add AWS IAM role support for exchange spooling on S3. ({issue}`12444`) | ||
* Improve query performance by reducing worker-to-worker communication overhead. ({issue}`11289`) | ||
* Improve performance and reduce memory usage of queries that contain aggregations. ({issue}`12336`) | ||
* Improve performance of correlated queries involving distinct aggregations. ({issue}`12564`) | ||
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## Web UI | ||
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* Clarify format of cumulative user memory on query details page. ({issue}`12596`) | ||
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## Accumulo connector | ||
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* Fail creating a new table if a table comment is specified. Previously, the | ||
comment was ignored. ({issue}`12452`) | ||
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## BigQuery connector | ||
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* Fail creating a new table if a table comment or a column comment is specified. | ||
Previously, the comment was ignored. ({issue}`12452`, {issue}`12574`) | ||
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## Cassandra connector | ||
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* Fail creating a new table if a table comment or a column comment is specified. | ||
Previously, the comment was ignored. ({issue}`12452`, {issue}`12574`) | ||
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## ClickHouse connector | ||
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* Fix incorrect results for certain aggregation queries when aggregations are | ||
pushed down to the underlying database. ({issue}`12598`) | ||
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## Delta Lake connector | ||
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* Add support for table comments during table creation.. ({issue}`12452`) | ||
* Fix incorrect `table already exists` error caused by a client timeout when | ||
creating a new table. ({issue}`12300`) | ||
* Fail creating a new table if a column comment is specified. Previously, the | ||
comment was ignored. ({issue}`12574`) | ||
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## Iceberg connector | ||
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* Add support for v2 tables for the `optimize` table procedure. ({issue}`12351`) | ||
* Rename `hive.target-max-file-size` to `iceberg.target-max-file-size` and | ||
`hive.delete-schema-locations-fallback` to `iceberg.delete-schema-locations-fallback`. ({issue}`12330`) | ||
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## Kudu connector | ||
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* Fail creating a new table if a table comment or a column comment is specified. | ||
Previously, the comment was ignored. ({issue}`12452`, {issue}`12574`) | ||
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## MariaDB connector | ||
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* Fix incorrect results for certain queries involving aggregations that are | ||
pushed down to the underlying database. ({issue}`12598`) | ||
* Fail creating a new table if a column comment is specified. Previously, the | ||
comment was ignored. ({issue}`12574`) | ||
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## Memory connector | ||
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* Fail creating a new table if a table comment or a column comment is specified. | ||
Previously, the comment was ignored. ({issue}`12452`, {issue}`12574`) | ||
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## MySQL connector | ||
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* Fix incorrect results for certain aggregation queries when aggregations are | ||
pushed down to the underlying database. ({issue}`12598`) | ||
* Fail creating a new table if a column comment is specified. Previously, the | ||
comment was ignored. ({issue}`12574`) | ||
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## Oracle connector | ||
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* Fail creating a new table if a table comment or a column comment is specified. | ||
Previously, the comment was ignored. ({issue}`12452`, {issue}`12574`) | ||
* Fix incorrect results for certain aggregation queries when aggregations are | ||
pushed down to the underlying database. ({issue}`12598`) | ||
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## Phoenix connector | ||
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* Fail creating a new table if a table comment or a column comment is specified. | ||
Previously, the comment was ignored. ({issue}`12452`, {issue}`12574`) | ||
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## PostgreSQL connector | ||
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* Fail creating a new table if a table comment or a column comment is specified. | ||
Previously, the comment was ignored. ({issue}`12452`, {issue}`12574`) | ||
* Fix incorrect results for certain aggregation queries when aggregations are | ||
pushed down to the underlying database. ({issue}`12598`) | ||
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## Raptor connector | ||
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* Fail creating a new table if a table comment or a column comment is specified. | ||
Previously, the comment was ignored. ({issue}`12452`, {issue}`12574`) | ||
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## Redshift connector | ||
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* Fail creating a new table if a table comment or a column comment is specified. | ||
Previously, the comment was ignored. ({issue}`12452`, {issue}`12574`) | ||
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## SingleStore (MemSQL) connector | ||
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* Fail creating a new table if a table comment or a column comment is specified. | ||
Previously, the comment was ignored. ({issue}`12452`, {issue}`12574`) | ||
* Fix incorrect results for certain aggregation queries when aggregations are | ||
pushed down to the underlying database. ({issue}`12598`) | ||
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## SQL Server connector | ||
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* Fail creating a new table if a table comment or a column comment is specified. | ||
Previously, the comment was ignored. ({issue}`12452`, {issue}`12574`) | ||
* Fix incorrect results for certain aggregation queries when aggregations are | ||
pushed down to the underlying database. ({issue}`12598`) | ||
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## SPI | ||
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* Allow limiting access to functions based on whether they are scalar, | ||
aggregation, window, or table functions. ({issue}`12544`) |