On Fri, Jan 12, 2007 at 11:55:07AM +0100, Mario Weilguni wrote:
> to_char(timestamp, 'yyyy') should be constant and marked immutable,
> or am I wrong here? Or is it not marked immutable because of possible
> changes on date_format?
AIUI, to_char is not immutable because it can be effected by external
variables, like LC_TIME.
As it is though, I'm not sure why you're using to_char here, surely
extract or date_truc would be more appropriate?
Have a nice day,
--
Martijn van Oosterhout <kleptog@svana.org> http://svana.org/kleptog/
> From each according to his ability. To each according to his ability to litigate.