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Re: Index optimization ?

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Bo Lorentsen <bl@xxxxxxxxxxx> writes:
> To me it sounds like an index lookup is a one time a query (not per row) 
> thing, but I don't understand why.

I can't explain it any more clearly than Florian did:
http://archives.postgresql.org/pgsql-general/2005-01/msg00769.php

			regards, tom lane

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