----- "Scott Marlowe" <scott.marlowe@gmail.com> escreveu:
> You do know that indexes in postgresql are not "covering" right?
> I.e.
> after hitting the index, the db then has to hit the table to see if
> those rows are in fact visible. So there's no such thing in pgsql,
> at
> the moment, as an index only scan.
That was just an estimation of effort to reach a tuple through seqscan X indexscan. In both cases the tuple have to be
checked,sure.
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