2010/8/29 Tom Lane <tgl@sss.pgh.pa.us>:
> Martijn van Oosterhout <kleptog@svana.org> writes:
>> On Sun, Aug 29, 2010 at 11:23:29AM -0400, Tom Lane wrote:
>>> It has nothing to do with boolean operators, just double evaluation.
>
>> I was wondering, wouldn't it be possible to avoid the double evaluation
>> by simply creating an extra slot for the intermediate value.
>
> Possibly, but the trick would be to figure out when to evaluate the
> values so that it would still behave the same as without inlining.
> I don't think the existing Param mechanism could do this without
> some additional help.
>
maybe subject for ToDo?
Regards
Pavel Stehule
> regards, tom lane
>
