Richard Broersma <richard.broer...@gmail.com> writes: > Can anyone one explain why a "WITH RECURSIVE" query has the same > results regardless whether UNION or UNION ALL is specified?
Well, if the rows are all different anyway, UNION isn't going to
eliminate any ...
regards, tom lane
--
Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-sql
