Ivan Sergio Borgonovo <mail(at)webthatworks(dot)it> writes:
> Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>> Huh. The only way I can see for that to happen is if the datatypes
>> involved aren't hashable. What's the datatypes of the two columns
>> being compared, anyway?
> thanks to svn I'd say you're right... one column was int the other
> bigint.
Ah. 8.3 can hash certain cross-type comparisons (including that one)
but prior versions won't.
regards, tom lane