Rolf =?iso-8859-1?q?=D8stvik?= <[EMAIL PROTECTED]> writes:
> I have a simple query which uses 32ms on 7.4.14 and 1015ms on 8.2.0.

There's something awfully strange about that 8.2 plan --- if it knew
that it'd have to scan all of uut_result_subset (which it should have
known, if the stats were up-to-date), why did it use an indexscan
rather than a seqscan?  Are you sure you haven't tweaked any parameters
you didn't tell us about, such as setting enable_seqscan = off?

                        regards, tom lane

---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
       choose an index scan if your joining column's datatypes do not
       match

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