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Re: 9.2 and index only scans

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2012/8/26 Tom Lane <tgl@xxxxxxxxxxxxx>:
> Pavel Stehule <pavel.stehule@xxxxxxxxx> writes:
>> is possible use seqscan for index?
>
> No, not for a normal indexscan --- concurrent page splits would break
> it.
>

and what about seq scan for prefetch index - and processing should be
random, but over pages in cache?

Pavel

> VACUUM can do that, mainly because it doesn't care if it visits some
> entries twice (and even then, it has to add a lot of pushups to ensure
> it doesn't miss any entries).
>
>                         regards, tom lane


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