Michael Glaesemann wrote: > > On Feb 19, 2007, at 18:04 , Alban Hertroys wrote: > >> Michael Glaesemann wrote: >>> >>> On Feb 18, 2007, at 20:29 , Karsten Hilbert wrote: >>> >>>> What I don't understand, however, is exactly *why* date_trunc is not >>>> immutable ? >>> >>> I believe it's because the result of date_trunc depends on the time zone >>> setting for the session. >> >> I understand the reasoning, but _under the conditions_ it is being used >> by the OP it could have been immutable, right? > > *Under the conditions* doesn't really make sense wrt immutable > functions. Immutable means is immutable under all conditions. 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. -- Alban Hertroys alban@xxxxxxxxxxxxxxxxx magproductions b.v. T: ++31(0)534346874 F: ++31(0)534346876 M: I: www.magproductions.nl A: Postbus 416 7500 AK Enschede // Integrate Your World //
