Release 424 (17 Aug 2023)

General

• Reduce coordinator overhead on large clusters. ({issue}18542)
• Require the JVM default charset to be UTF-8. This can be set with the JVM command line option -Dfile.encoding=UTF-8. ({issue}18657)

JDBC driver

• Add the number of bytes that have been written to the query results response. ({issue}18651)

Delta Lake connector

• Remove the legacy Parquet reader, along with the parquet.optimized-reader.enabled and parquet.optimized-nested-reader.enabled configuration properties. ({issue}18639)

Hive connector

• Improve performance for line-oriented Hive formats. ({issue}18703)
• Improve performance of reading JSON files. ({issue}18709)
• Remove the legacy Parquet reader, along with the parquet.optimized-reader.enabled and parquet.optimized-nested-reader.enabled configuration properties. ({issue}18639)
• Fix incorrect reporting of written bytes for uncompressed text files, which prevented the target_max_file_size session property from working. ({issue}18701)

Hudi connector

• Remove the legacy Parquet reader, along with the parquet.optimized-reader.enabled and parquet.optimized-nested-reader.enabled configuration properties. ({issue}18639)

Iceberg connector

• Add support for CASCADE option in DROP SCHEMA statements. ({issue}18689)
• Remove the legacy Parquet reader, along with the parquet.optimized-reader.enabled and parquet.optimized-nested-reader.enabled configuration properties. ({issue}18639)
• Fix potential incorrect query results when a query involves a predicate on a timestamp with time zone column. ({issue}18588)

Memory connector

• Add support for CASCADE option in DROP SCHEMA statements. ({issue}18668)

PostgreSQL connector

• Add support for CASCADE option in DROP SCHEMA statements. ({issue}18663)
• Remove support for Postgres versions older than version 11. ({issue}18696)

SPI

• Introduce the getNewTableWriterScalingOptions and getInsertWriterScalingOptions methods to ConnectorMetadata, which enable connectors to limit writer scaling. ({issue}18561)