Re:

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От Tom Lane
Тема Re:
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Msg-id 20565.1072369734@sss.pgh.pa.us
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Ответ на  ("Michael Rothschild" <michael.r@corigin.co.il>)
Список pgsql-performance
"Michael Rothschild" <michael.r@corigin.co.il> writes:
> Based on what I saw (and maybe I didn't see enough) it seems that the
> optimizer will always decide to repeatedly scan the whole row set
> returned by sub selects in the context of an IN clause sequentially,

What version were you looking at?

            regards, tom lane

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