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From: Claudio Freire <[email protected]>
To: David G. Johnston <[email protected]>
Cc: Johan Fredriksson <[email protected]>
Cc: postgres performance list <[email protected]>
Subject: Re: Performance problems with 9.2.15
Date: Thu, 21 Jul 2016 18:12:47 -0300
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On Thu, Jul 21, 2016 at 3:29 PM, David G. Johnston
<[email protected]> wrote:
> On Thu, Jul 21, 2016 at 2:24 PM, Claudio Freire <[email protected]>
> wrote:
>>
>> That cross join doesn't look right. It has no join condition.
>
>
> That is that the definition of a "CROSS JOIN"...
>
> David J.

Well, maybe it shouldn't be.

A cross join I mean.

I see the query and a cross join there doesn't make much sense.

There's no filtering of the output rows on the where clause either
AFAICT, and it's producing a lot of intermediate rows that don't seem
to be necessary. That was my point.


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