2010/3/29 Marko Tiikkaja <marko.tiikk...@cs.helsinki.fi>: > On 2010-03-29 11:19 +0200, Pavel Stehule wrote: >> postgres=# explain select a from a left join b on true;
you have a true. I forgot SELECT DISTINCT regards Pavel > > This is effectively a cross join and it would give wrong answers. Try > SELECT a FROM a LEFT JOIN b ON a.a = b.b; > > > Regards, > Marko Tiikkaja > -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
