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Release 409 (3 Mar 2023)

General​

  • Add support for dropping nested fields with a DROP COLUMN statement. (#15975)
  • Add queue, analysis, planning, and execution time to the output of EXPLAIN ANALYZE. (#16329)
  • Add support for executing table functions with any number of table arguments. (#1839)
  • Improve output of EXPLAIN queries to show statistics when a query contains aggregations. (#16201)
  • Improve performance of queries with aggregations containing a DISTINCT clause using table statistics. This can be configured with the optimizer.mark-distinct-strategyconfiguration property, and the optimizer.use-mark-distinct configuration property is now deprecated in favor of it. (#15927)
  • Improve performance of LIKE expressions with patterns constructed dynamically. (#15999)
  • Remove the distributed-index-joins-enabled configuration property and related functionality. (#15375)
  • Fix failure when using non-comparable and non-sortable values as part of a VALUES expression. (#16242)

BigQuery connector​

  • Add support for using default values when inserting data. (#16327)
  • Fix failure when non-lowercase column names exist in the query table function. (#16075)

Cassandra connector​

  • Add support for TIME type. (#13063)

ClickHouse connector​

  • Remove support for the ru.yandex.clickhouse.ClickHouseDriver legacy JDBC driver in the clickhouse.legacy-driver configuration property. (#16188)
  • Remove support for specifying expressions in the sample_by table property to prevent SQL injection. (#16261)

Delta Lake connector​

  • Avoid query failure by inferring required Delta Lake version when creating new tables or configuring table features. (#16310)
  • Fix query failure when reading Parquet files generated by Kafka Connect. (#16264)

Hive connector​

  • Add support for the Hadoop DefaultCodec to Hive formats. (#16250)
  • Add a native CSV file format reader and writer. These can be disabled with the csv_native_reader_enabled and csv_native_writer_enabled session properties or the csv.native-reader.enabled and csv.native-writer.enabled configuration properties. (#15918)
  • Add a native JSON file format reader and writer. These can be disabled with the json_native_reader_enabled and json_native_writer_enabled session properties or the json.native-reader.enabled and json.native-writer.enabled configuration properties. (#15918)
  • Add a native text file format reader and writer. These can be disabled with the text_file_native_reader_enabled and text_file_native_writer_enabled session properties or the text-file.native-reader.enabled and text-file.native-writer.enabled configuration properties. (#15918)
  • Add a native sequence file format reader and writer. These can be disabled with the sequence_file_native_reader_enabled and sequence_file_native_writer_enabled session properties or the sequence-file.native-reader.enabled and sequence-file.native-writer.enabled configuration properties. (#15918)
  • Add a native regex file format reader. The reader can be disabled with the regex_native_reader_enabled session property or the regex.native-reader.enabled configuration property. (#15918)
  • Add regex and regex_case_insensitive table properties for the REGEX format. (#16271)
  • Improve performance of queries which read from partitioned Hive tables and write to partitioned tables when statistics are not available for the source tables. (#16229)
  • Improve query performance when only table statistics generated by Apache Spark are available. This can be disabled via the hive.metastore.thrift.use-spark-table-statistics-fallback configuration property. (#16120)
  • Fix incorrectly ignoring computed table statistics in ANALYZE. (#15995)
  • Fix query failure when reading Parquet files generated by Kafka Connect. (#16264)

Hudi connector​

  • Fix query failure when reading Parquet files generated by Kafka Connect. (#16264)

Iceberg connector​

  • Add support for dropping nested fields with a DROP COLUMN statement. (#15975)
  • Add support for Iceberg table sort orders. Tables can have a list of sorted_by columns which are used to order files written to the table. (#14891)
  • Fix query failure when reading nested columns on a table with equality delete files. (#14836)
  • Fix query failure when reading Parquet files generated by Kafka Connect. (#16264)

SQL Server connector​

  • Add support for pushing down joins using = and != predicates over text columns if the column uses a case-sensitive collation within SQL Server. (#16185)