On Mon, Feb 19, 2007 at 10:16:12AM +0100, Alban Hertroys wrote: > What I'm trying to say is not that it _is_ immutable, but that it > _behaves_ immutable (under said conditions). > > This could imply that if a certain condition is available in a query on > which such a function operates, it would behave immutable. That is precisely why I didn't get the idea upfront that date_trunc() wouldn't be immutable just so. I'll solve it with a date_trunc_utc() wrapper. Thanks to all who chipped in. Something new to learn every day. Karsten -- GPG key ID E4071346 @ wwwkeys.pgp.net E167 67FD A291 2BEA 73BD 4537 78B9 A9F9 E407 1346