Gregory Stark <[EMAIL PROTECTED]> writes:
> What if the equivalence class is in more than one place in the ORDER BY?
That's not a problem. ORDER BY 1,1 is not different from ORDER BY 1,
even if the referenced expression is volatile, because the secondary
sort key is useless anyway.
> And what w
"Tom Lane" <[EMAIL PROTECTED]> writes:
> select random() as a, random() as b from foo order by b, a;
>
> And it definitely seems the wrong thing for the last one.
Ouch.
> What I'm thinking of doing is adding a field to EquivalenceClass that
> carries the ressortgroupref of the originating
