Re: Oddity with view

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От Tom Lane
Тема Re: Oddity with view
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Msg-id 11916.1226341898@sss.pgh.pa.us
обсуждение исходный текст
Ответ на Re: Oddity with view  (Jim 'Decibel!' Nasby)
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Дерево обсуждения
Oddity with view  (Jim 'Decibel!' Nasby, )
 Re: Oddity with view  (Tom Lane, )
  Re: Oddity with view  (Jim 'Decibel!' Nasby, )
   Re: Oddity with view  (Richard Huxton, )
    Re: Oddity with view (now with test case)  (Jim 'Decibel!' Nasby, )
     Re: Oddity with view (now with test case)  (Tom Lane, )
      Re: Oddity with view (now with test case)  (Jim 'Decibel!' Nasby, )
       Re: Oddity with view (now with test case)  (Tom Lane, )
        Re: Oddity with view (now with test case)  (Jim 'Decibel!' Nasby, )
         Re: Oddity with view (now with test case)  (Tom Lane, )
          Re: Oddity with view (now with test case)  (Jim 'Decibel!' Nasby, )
           Re: Oddity with view (now with test case)  (Tom Lane, )
   Re: Oddity with view  (Tom Lane, )
"Jim 'Decibel!' Nasby" <> writes:
> How on earth did the seqscan suddenly take 4x longer? And why is the
> subquery scan then doubling the amount of time again?

Maybe the disk access is less sequential because of the need to fetch
the other table too?

            regards, tom lane

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