Re: [HACKERS] temporary indexes

Re: [HACKERS] temporary indexes

This is a discussion on Re: [HACKERS] temporary indexes within the Pgsql Performance forums, part of the PostgreSQL category; --> "Kevin Grittner" <Kevin.Grittner@wicourts.gov> writes: > EXISTS works in situations where > you need to compare on multiple columns, so ...

		Unix Technical Forum > Database Server Software > PostgreSQL > Pgsql Performance
Re: [HACKERS] temporary indexes

#1 (permalink)

04-19-2008, 08:12 AM

Tom Lane

Posts: n/a

Re: [HACKERS] temporary indexes

"Kevin Grittner" <Kevin.Grittner@wicourts.gov> writes:
> EXISTS works in situations where
> you need to compare on multiple columns, so it is useful in many
> situations where IN or MIN/MAX techniques just don't work.

IN works fine on multiple columns:

(foo, bar, baz) IN (SELECT x, y, z FROM ...)

regards, tom lane

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