Stephen Friedrich <stephen.friedrich@fortis-it.de> writes:
> Or do you mean that the last rule that
> gets evaluated will determine the result, even if it's where clause evaluates
> to false?
Right. In effect, the last one in alphabetical order will always
determine the result, whether it's the one that does the useful insert
or not.
> Thanks I'll try that. Yet I have only some dozen cdrs at any time, so
> I doubt it will make a big difference?
Perhaps not, but it's worth checking.
regards, tom lane