22.21. Release 0.165

General Changes

• Make AT a non-reserved keyword.
• Improve performance of transform().
• Improve exchange performance by deserializing in parallel.
• Add support for compressed exchanges. This can be enabled with the exchange.compression-enabled config option.
• Add input and hash collision statistics to EXPLAIN ANALYZE output.

Hive Changes

• Add support for MAP and ARRAY types in optimized Parquet reader.

MySQL and PostgreSQL Changes

• Fix connection leak on workers.