Re: Planner choosing NestedLoop, although it is slower...

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От Tom Lane
Тема Re: Planner choosing NestedLoop, although it is slower...
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Msg-id 18737.1310510362@sss.pgh.pa.us
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Ответ на Re: Planner choosing NestedLoop, although it is slower...  (Mario Splivalo <mario.splivalo@megafon.hr>)
Ответы Re: Planner choosing NestedLoop, although it is slower...  (Mario Splivalo <mario.splivalo@megafon.hr>)
Re: Planner choosing NestedLoop, although it is slower...  (Mario Splivalo <mario.splivalo@megafon.hr>)
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Mario Splivalo <mario.splivalo@megafon.hr> writes:
> On 07/12/2011 10:04 PM, Tom Lane wrote:
>> What you need to look into is why the estimated join size is 9400 rows
>> when the actual join size is zero.  Are both tables ANALYZEd?  Are you
>> intentionally selecting rows that have no join partners?

> Yes, both tables have been ANALYZEd. What do you mean, intentilnaly
> selecting rows taht have no join partners?

I'm wondering why the actual join size is zero.  That seems like a
rather unexpected case for a query like this.

            regards, tom lane

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