"Jens Reufsteck" <[email protected]> writes:
> I’ve got a lengthy query, that doesn't finish in reasonable time (i.e.
> 10min+). I suspect, that the query optimizer miscalculates the number of
> rows for part of the query.
> ...
> We're using postgres 9.0.4.

Try 9.0.5.  There was a bug fixed in this area.

                        regards, tom lane

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