============= Release 0.109

General Changes

• Add :func:!slice, :func:!md5, :func:!array_min and :func:!array_max functions.
• Fix bug that could cause queries submitted soon after startup to hang forever.
• Fix bug that could cause JOIN queries to hang forever, if the right side of the JOIN had too little data or skewed data.
• Improve index join planning heuristics to favor streaming execution.
• Improve validation of date/time literals.
• Produce RPM package for Presto server.
• Always redistribute data when writing tables to avoid skew. This can be disabled by setting the session property redistribute_writes or the config property redistribute-writes to false.

Remove "Big Query" Support

The experimental support for big queries has been removed in favor of the new resource manager which can be enabled by using the experimental.cluster-memory-manager-enabled config option. The experimental_big_query session property and the following config options are no longer supported: experimental.big-query-initial-hash-partitions, experimental.max-concurrent-big-queries and experimental.max-queued-big-queries.