>>>>> "Guillaume" == Guillaume Smet <guillaume.s...@gmail.com> writes:
Guillaume> - "While semi-joins merely replace existing IN joins, Guillaume> anti-joins are a new capability for NOT IN and NOT EXIST Guillaume> clauses (Tom) This improves optimization possibilities." Guillaume> -> remove the "(Tom)", s/EXIST/EXISTS/ Also s/NOT IN and // (anti-joins are not used for NOT IN due to the awkward semantics of nulls). Should possibly also mention the fact that some outer joins can be planned as anti-joins too. -- Andrew (irc:RhodiumToad) -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
