Release 388 (29 Jun 2022)

General

• Add support for EXPLAIN (TYPE LOGICAL, FORMAT JSON). ({issue}12694)
• Add use_exact_partitioning session property to re-partition data when the upstream stage's partitioning does not exactly match what the downstream stage expects. ({issue}12495)
• Improve read performance for row data types. ({issue}12926)
• Remove the grouped execution mechanism, including the grouped-execution-enabled, dynamic-schedule-for-grouped-execution, and concurrent-lifespans-per-task configuration properties and the grouped_execution, dynamic_schedule_for_grouped_execution, and concurrent_lifespans_per_task session properties. ({issue}12916)

Security

• Add refresh token support in OAuth 2.0. ({issue}12664)

Delta Lake connector

• Add support for setting table and column comments with the COMMENT statement. ({issue}12971)
• Support reading tables with the property delta.columnMapping.mode=name. ({issue}12675)
• Allow renaming tables with an explicitly set location. ({issue}11400)

Elasticsearch connector

• Remove support for Elasticsearch versions below 6.6.0. ({issue}11263)

Hive connector

• Improve performance of listing files and generating splits when recursive directory listings are enabled and tables are stored in S3. ({issue}12443)
• Fix incompatibility that prevents Apache Hive 3 and older from reading timestamp columns in files produced by Trino's optimized Parquet writer. ({issue}12857 )
• Prevent reading from a table that was modified within the same Trino transaction. Previously, this returned incorrect query results. ({issue}11769)

Iceberg connector

• Add support for reading tinyint columns from ORC files. ({issue}8919)
• Add the ability to configure the schema for materialized view storage tables. ({issue}12591)
• Remove old deletion-tracking files when running optimize. ({issue}12617)
• Fix failure when invoking the rollback_to_snapshot procedure. ({issue}12887)
• Fix query failure when reading the $partitions table after table partitioning changed. ({issue}12874)