Re: Plannner favoring nested loop

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От Tom Lane
Тема Re: Plannner favoring nested loop
Дата
Msg-id 19019.1178573853@sss.pgh.pa.us
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Ответ на Plannner favoring nested loop  (Abu Mushayeed <abumushayeed@yahoo.com>)
Ответы Re: Plannner favoring nested loop  (Abu Mushayeed <abumushayeed@yahoo.com>)
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Abu Mushayeed <abumushayeed@yahoo.com> writes:
>   I am trying to determine if I can make the planner see that nested loop is very expensive while it is trying to do
anplan for a query and not pick that route.  

If it's doing that when it shouldn't, it's probably because it's
underestimated the number of rows in the outer relation.  Look to your
stats settings.

            regards, tom lane

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