On Fri, Dec 31, 2010 at 12:34:50AM -0500, Robert Haas wrote: > On Thu, Dec 30, 2010 at 8:35 PM, Noah Misch <n...@leadboat.com> wrote: > > 4. A FuncExpr node has answers given by the bitwise-AND of its funcexempt > > field > > and the answers from its first argument. > > Why its first argument?
funcexempt would only be nonzero for FuncExpr of length coercion casts. Those have the subject datum as a first argument, typmod as second, and is-explicit boolean as third. The other arguments are effectively already validated. That brings up a point -- the exemptor function also needs an is-explicit argument, as that affects the decision for some types. -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
