Release 417 (10 May 2023)

General

• Improve performance of UNION ALL queries. ({issue}17265)

Delta Lake connector

• Add support for COMMENT ON VIEW. ({issue}17089)
• Improve performance when reading Parquet data written by Trino. ({issue}17373, {issue}17404)
• Improve read performance for tables with row columns when only a subset of fields is needed for a query. ({issue}17085)

Hive connector

• Add support for specifying arbitrary table properties via the extra_properties table property. ({issue}954)
• Improve performance when reading Parquet data written by Trino. ({issue}17373, {issue}17404)
• Improve performance when reading text files that contain more columns in the file than are mapped in the schema. ({issue}17364)
• Limit file listing cache based on in-memory size instead of number of entries. This is configured via the hive.file-status-cache.max-retained-size and hive.per-transaction-file-status-cache.max-retained-size configuration properties. The hive.per-transaction-file-status-cache-maximum-size and hive.file-status-cache-size configuration properties are deprecated. ({issue}17285)

Hudi connector

• Improve performance when reading Parquet data written by Trino. ({issue}17373, {issue}17404)

Iceberg connector

• Improve performance when reading Parquet data written by Trino. ({issue}17373, {issue}17404)