Hi, I have a volatile function that returns multiple rows. It may also return nothing. Now, I want to write an SQL statement that calls this function until it returns an empty result set and returns all the rows.
So, in principle I want to: WITH RECURSIVE t AS ( SELECT * FROM xx() UNION ALL SELECT * FROM xx() ) SELECT * FROM t; But that's not recursive because the union all part lacks a reference to t. Next I tried this: WITH RECURSIVE t AS ( SELECT * FROM xx() UNION ALL SELECT * FROM xx() WHERE EXISTS (SELECT 1 FROM t) ) SELECT * FROM t; But the reference to t is not allowed in a subquery. What's the best (or at least a working) way to achieve what I want? I can do it in plpgsql. But that would mean to accumulate the complete result in memory first, right? I need to avoid that. Thanks, Torsten -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
