On Tue, Apr 23, 2013 at 09:57:27AM -0700, David Fetter wrote: > Folks, > > While testing the upcoming FILTER clause for aggregates, Erik Rijkers > uncovered a long-standing bug in $subject, namely that this case > wasn't handled. Please find attached a patch by Andrew Gierth and > myself which fixes this issue and adds a regression test to ensure it > remains fixed.
Please see below results when I run the regression test query on git master, REL_9_2_STABLE, and REL9_1_STABLE, respectively: $ psql postgres psql (9.3devel) Type "help" for help. shackle@postgres:5493=# SELECT array_agg(a COLLATE "C" ORDER BY b COLLATE "POSIX") FROM (VALUES ('foo','bar')) v(a,b); ERROR: collation mismatch between explicit collations "C" and "POSIX" LINE 1: SELECT array_agg(a COLLATE "C" ORDER BY b COLLATE "POSIX") F... ^ $ psql postgres psql (9.2.4) Type "help" for help. shackle@postgres:5492=# SELECT array_agg(a COLLATE "C" ORDER BY b COLLATE "POSIX") FROM (VALUES ('foo','bar')) v(a,b); ERROR: collation mismatch between explicit collations "C" and "POSIX" LINE 1: SELECT array_agg(a COLLATE "C" ORDER BY b COLLATE "POSIX") F... ^ $ psql postgres psql (9.1.9) Type "help" for help. shackle@postgres:5491=# SELECT array_agg(a COLLATE "C" ORDER BY b COLLATE "POSIX") FROM (VALUES ('foo','bar')) v(a,b); ERROR: collation mismatch between explicit collations "C" and "POSIX" LINE 1: SELECT array_agg(a COLLATE "C" ORDER BY b COLLATE "POSIX") F... ^ Cheers, David. -- David Fetter <da...@fetter.org> http://fetter.org/ Phone: +1 415 235 3778 AIM: dfetter666 Yahoo!: dfetter Skype: davidfetter XMPP: david.fet...@gmail.com iCal: webcal://www.tripit.com/feed/ical/people/david74/tripit.ics Remember to vote! Consider donating to Postgres: http://www.postgresql.org/about/donate -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers