"Mason Hale" <[EMAIL PROTECTED]> writes:
> I'm getting some unexpected results with a NOT IN query -- this is on 8.2.5.

If there are any NULLs in subscription.last_feed_download_task_id, that
NOT IN will not behave the way you are expecting.  You might want to
filter the nulls out of the subselect result ...

                        regards, tom lane

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