STRICT functions return NULL if any of their inputs are NULL according to the manual, so that they need not be executed at all.
Unless it is a Set Returning Function, in which case a NULL input is not reduced nor does it to appear to be handled as a special case in the executor function scan code. So a function that is both STRICT and SET RETURNING will return rows. Presumably this is just a case of missing documentation? -- Simon Riggs http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
