Re: Optimizer generates bad plans.

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От Bruce Momjian
Тема Re: Optimizer generates bad plans.
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Msg-id 200209192209.g8JM96L03130@candle.pha.pa.us
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Ответ на Optimizer generates bad plans.  (Kris Jurka <jurka@ejurka.com>)
Ответы Re: Optimizer generates bad plans.  (Kris Jurka <books@ejurka.com>)
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Congratulations.  That is the largest plan I have ever seen.  ;-)

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Kris Jurka wrote:
> While adding schema support to the JDBC Driver, I came across a query 
> which occasionally generates some spectacularly bad plans.  I have 
> attached the query and explain analyze outputs against today's cvs head 
> for queries that take between 9 and 845941 msec.  In the JDBC Driver I 
> will specify a reasonable join order using explicit JOINs, but I thought 
> someone might be interested in a test case for the optimizer.

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
359-1001+  If your life is a hard drive,     |  13 Roberts Road +  Christ can be your backup.        |  Newtown Square,
Pennsylvania19073
 


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