On Wed, Jul 20, 2016 at 06:03:08PM -0400, Tom Lane wrote: > Greg Stark <st...@mit.edu> writes: > > But I think I agree that it's surprising that the collate clause isn't > > working in the ORDER BY on a column produced by a UNION. Certainly > > that's where people usually want to put it. > > See this ancient comment in transformSetOperationStmt: > > * For now, we don't support resjunk sort clauses on the output of a > * setOperation tree --- you can only use the SQL92-spec options of > * selecting an output column by name or number. Enforce by checking that > * transformSortClause doesn't add any items to tlist. > > Perhaps sometime we ought to make an effort to relax that.
Oh, I didn't see that above the error block. -- Bruce Momjian <br...@momjian.us> http://momjian.us EnterpriseDB http://enterprisedb.com + As you are, so once was I. As I am, so you will be. + + Ancient Roman grave inscription + -- Sent via pgsql-hackers mailing list (firstname.lastname@example.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers