Re: Bad query plan when you add many OR conditions

Tom Lane <[email protected]> Fri, 10 Jan 2020 10:18:02 -0500

Newsgroups	gmane.comp.db.postgresql.performance
Message-ID	<[email protected]>

Marco Colli <[email protected]> writes:
> As you can see it is a *index scan* and not an *index only* scan... I don't
> understand why. The index includes all the fields used by the query... so
> an index only scan should be possible.

Huh?  The query is "select * from ...", so it retrieves *all* columns
of the table.

			regards, tom lane