With Returning

WITH [RECURSIVE] RETURNING

• TODO for David Fetter
  • Write up history [D]
  • Create presentations [D]
  • Doc changes
  • Regression tests
  • Test for breakage

• TODO for Dan Colish
  • Get some more bounty queries
  • merge refactoring of executor into writable_cte branch

• TODO for Marko Tiikkaja
  • Make ExecutePlan() a bit prettier ( http://archives.postgresql.org/pgsql-hackers/2009-11/msg01860.php )
  • Change the grammar to allow WITH before INSERT, UPDATE and DELETE [D]
  • Fix DO ALSO SELECT .. rule logic [D]
  • Implement execute-once property for CTEs with INSERT/UPDATE/DELETE [D]
  • Allow non-referenced CTEs have INSERT/UPDATE/DELETE without RETURNING [D]
  • Fix trigger behaviour inside queries which have SELECT as top-level query [D]
  • Rethink how result relations should be handled [D]