On 20 August 2011 15:34, Bruce Momjian <[email protected]> wrote: > Actually, using UNION instead of UNION ALL does prevent some infinite > loops:
While that is worth pointing out, it cannot be recommended as a way of preventing infinite recursion; after all, all 5 WITH RECURSIVE examples in the docs use UNION ALL. It's just a different way of specifying a terminating condition that isn't likely to be applicable to more complicated rCTEs. -- Peter Geoghegan http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training and Services -- Sent via pgsql-hackers mailing list ([email protected]) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
