ANSI SQL allows at most one OUT parameter for a function (which can be
used instead of having the function return a value via the usual means).
OK, so that answers my question above: a single OUT parameter should be
equated to an ordinary return value, not a RECORD, so as to emulate this
aspect of the spec.
Shouldn't you have the spec in one hand while designing this feature? :D
Chris
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TIP 9: the planner will ignore your desire to choose an index scan if your
joining column's datatypes do not match
