Marc Tardif <admin@wtbwts.com> writes:
> I'm not sure I understand what is "qpqual" in your explanation. Once the
> first indexscan is performed, is a temporary table created (in-file or
> in-memory) containing the relevant tuples?
No, it's all done on-the-fly as each tuple is scanned.
> is the remaining part of the WHERE
> clause re-evaluated again and again for each of the found tuples in the
> first indexscan?
That's what I said.
regards, tom lane