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Release 396 (15 Sep 2022)

General​

  • Improve performance of queries that process string data. (#12798)
  • Fix failure when querying views that use table functions. (#13944)

BigQuery connector​

ClickHouse connector​

  • Improve performance when pushing down large lists of predicates by raising the default threshold before the predicate is compacted. (#14029)
  • Fix mapping to the ClickHouse Date and DateTime types to include the full range of possible values. (#11116)
  • Fix failure when specifying a table or column comment that contains special characters. (#14058)

Delta Lake connector​

  • Add support for writing to tables using version 3 of the writer. This does not yet include support for CHECK constraints. (#14068)
  • Add support for reading tables with the table property delta.columnMapping.mode set to id. (#13629)
  • Improve performance when writing structural data types to Parquet files. (#13714)
  • Attempt to undo the operation when writing a checkpoint file fails. (#14108)
  • Fix performance regression when reading Parquet data. (#14094)

Hive connector​

Iceberg connector​

  • Improve performance when writing structural data types to Parquet files. (#13714)
  • Improve performance of queries that contain predicates involving date_trunc on date, timestamp or timestamp with time zone partition columns. (#14011)
  • Fix incorrect results from using the [VERSION | TIMESTAMP] AS OF clause when the snapshot's schema differs from the current schema of the table. (#14064)
  • Prevent No bucket node map failures when inserting data. (#13960)
  • Fix performance regression when reading Parquet data introduced in Trino version 394. (#14094)

MariaDB connector​

  • Fix failure when using special characters in a table or column comment when creating a table. (#14058)

MySQL connector​

  • Fix failure when using special characters in a table or column comment when creating a table. (#14058)

Oracle connector​

  • Fix failure when setting a column comment with special characters. (#14058)

Phoenix connector​

  • Improve performance when pushing down large lists of predicates by raising the default threshold before the predicate is compacted. (#14029)

PostgreSQL connector​

  • Fix failure when setting a column comment with special characters. (#14058)

Redshift connector​

  • Fix failure when setting a column comment with special characters. (#14058)

SPI​

  • Add the SystemAccessControl.checkCanGrantExecuteFunctionPrivilege overload, which needs to be implemented to allow views that use table functions. (#13944)
  • Add the ConnectorMetadata.applyJoin overload. It provides the connector with a join condition that is as complete as possible to represent using ConnectorExpression. Deprecate the previous version of ConnectorMetadata.applyJoin. (#13943)