On Tue, 6 May 2003, Tom Lane wrote:
> > It would be nice to add support for multi-column IN..
> > WHERE (a, b, c) IN (SELECT a, b, c ...)
>
> RTFM...
Maybe he did read the manual:
6.15.3. IN (subquery form)
expression IN (subquery)
The right-hand side of this form of IN is a parenthesized subquery, which
must return exactly one column.
--
/Dennis
