Ivan Sergio Borgonovo <mail@xxxxxxxxxxxxxxx> writes: > Tom Lane <tgl@xxxxxxxxxxxxx> 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