Tatsuo Ishii <ishii@xxxxxxxxxxxxxx> writes: > So can I say "if a function is marked IMMUTABLE, then it should never > modify database"? Is there any counter example? > It seems if above is correct, I can say STABLE functions should never > modify databases as well. Both of those things are explicitly stated here: http://developer.postgresql.org/pgdocs/postgres/xfunc-volatility.html regards, tom lane -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
