Clemens Eisserer <linuxhippy@xxxxxxxxx> Friday 08 April 2011 23:44:21 > Hi, > > I have a query where I UNION several select statements which return > IDs of type INTEGER. > > This works well, if the IDs don't need to be sorted: > > SELECT id FROM table WHERE id IN ((select id FROM table WHERE ...) UNION > > (SELECT id FROM table_ WHERE ....)) > > However I need the result the UNIONs to be sorted, so I tried the following: > > SELECT id FROM table WHERE id IN (SELECT col0 FROM ((select id FROM table > > WHERE ...) UNION (SELECT id FROM table_ WHERE ....)) AS col0 ORDER BY > > col0 OFFSET X LIMIT Y) > > FEHLER: Operator existiert nicht: integer = record > ERROR: Operator does not exist: integer = record > LINE 1: Select id FROM table WHERE id IN (Select col0 FROM ... > > Is there any way to get the results of UNIONs sorted, without > converting it to record? > > Thanks, Clemens > > PS: I know the query looks really stupid, however the queries I UNION > are auto-generated SQL. > I don't have much choice here to write the query more efficient :/ May you try construct like this: SELECT i FROM (/* Your query example: */ SELECT i from v1 union select i from v2) as alias order by i; ? -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
