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# Release 395 (7 Sep 2022) | ||
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## General | ||
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* Reduce memory consumption when fault-tolerant execution is enabled. ({issue}`13855`) | ||
* Reduce memory consumption of aggregations. ({issue}`12512`) | ||
* Improve performance of aggregations with decimals. ({issue}`13573`) | ||
* Improve concurrency for large clusters. ({issue}`13934`, `13986`) | ||
* Remove `information_schema.role_authorization_descriptors` table. ({issue}`11341`) | ||
* Fix `SHOW CREATE TABLE` or `SHOW COLUMNS` showing an invalid type for columns | ||
that use a reserved keyword as column name. ({issue}`13483`) | ||
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## ClickHouse connector | ||
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* Fix query failure when renaming or dropping a column with a name which matches | ||
a reserved keyword or has special characters which require it to be quoted. ({issue}`13839`) | ||
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## Delta Lake connector | ||
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* Add support for the `ALTER TABLE ... RENAME TO` statement with a Glue | ||
metastore. ({issue}`12985`) | ||
* Improve performance of inserts by automatically scaling the number of writers | ||
within a worker node. ({issue}`13111`) | ||
* Enforce `delta.checkpoint.writeStatsAsJson` and | ||
`delta.checkpoint.writeStatsAsStruct` table properties to ensure table | ||
statistics are written in the correct format. ({issue}`12031`) | ||
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## Hive connector | ||
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* Improve performance of inserts by automatically scaling the number of writers | ||
within a worker node. ({issue}`13111`) | ||
* Improve performance of S3 Select when using CSV files as an input. ({issue}`13754`) | ||
* Fix error where the S3 KMS key is not searched in the proper AWS region when | ||
S3 client-side encryption is used. ({issue}`13715`) | ||
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## Iceberg connector | ||
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* Improve performance of inserts by automatically scaling the number of writers | ||
within a worker node. ({issue}`13111`) | ||
* Fix creating metadata and manifest files with a URL-encoded name on S3 when | ||
the metadata location has trailing slashes. ({issue}`13759`) | ||
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## MariaDB connector | ||
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* Fix query failure when renaming or dropping a column with a name which matches | ||
a reserved keyword or has special characters which require it to be quoted. ({issue}`13839`) | ||
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## Memory connector | ||
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* Add support for table and column comments. ({issue}`13936`) | ||
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## MongoDB connector | ||
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* Fix query failure when filtering on columns of `json` type. ({issue}`13536`) | ||
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## MySQL connector | ||
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* Fix query failure when renaming or dropping a column with a name which matches | ||
a reserved keyword or has special characters which require it to be quoted. ({issue}`13839`) | ||
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## Oracle connector | ||
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* Fix query failure when renaming or dropping a column with a name which matches | ||
a reserved keyword or has special characters which require it to be quoted. ({issue}`13839`) | ||
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## Phoenix connector | ||
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* Fix query failure when adding, renaming, or dropping a column with a name | ||
which matches a reserved keyword or has special characters which require it to | ||
be quoted. ({issue}`13839`) | ||
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## PostgreSQL connector | ||
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* Fix query failure when renaming or dropping a column with a name which matches | ||
a reserved keyword or has special characters which require it to be quoted. ({issue}`13839`) | ||
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## Prometheus connector | ||
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* Add support for case-insensitive table name matching with the | ||
`prometheus.case-insensitive-name-matching` configuration property. ({issue}`8740`) | ||
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## Redshift connector | ||
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* Fix query failure when renaming or dropping a column with a name which matches | ||
a reserved keyword or has special characters which require it to be quoted. ({issue}`13839`) | ||
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## SingleStore (MemSQL) connector | ||
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* Fix query failure when renaming or dropping a column with a name which matches | ||
a reserved keyword or has special characters which require it to be quoted. ({issue}`13839`) | ||
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## SQL Server connector | ||
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* Fix query failure when renaming or dropping a column with a name which matches | ||
a reserved keyword or has special characters which require it to be quoted. ({issue}`13839`) | ||
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## SPI | ||
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* Add support for dynamic function resolution. ({issue}`12588`) | ||
* Rename `LIKE_PATTERN_FUNCTION_NAME` to `LIKE_FUNCTION_NAME` in | ||
`StandardFunctions`. ({issue}`13965`) | ||
* Remove the `listAllRoleGrants` method from `ConnectorMetadata`. ({issue}`11341`) |