In particular the fixes contained in this maintenance release address 2 potential segfaults and no other security vulnerabilities. The bugfixes are related to background workers, OUTER JOINs, ordered append on space partitioned hypertables and expression indexes.

Bugfixes * #1327 Fix chunk exclusion with ordered append * #1390 Fix deletes of background workers while a job is running * #1392 Fix cagg_agg_validate expression handling (segfault) * #1408 Fix ChunkAppend space partitioning support for ordered append * #1420 Fix OUTER JOIN qual propagation * #1422 Fix background worker error handling (segfault) * #1424 Fix ChunkAppend LIMIT pushdown * #1429 Fix expression index creation

Thanks * @shahidhk for reporting an issue with OUTER JOINs * @cossbow and @xxGL1TCHxx for reporting reporting issues with ChunkAppend and space partitioning * @est for reporting an issue with CASE expressions in continuous aggregates * @devlucasc for reporting the issue with deleting a background worker while a job is running * @ryan-shaw for reporting an issue with expression indexes on hypertables with dropped columns

The music for this release was Gorillaz's Gorillaz.