Re: cross column correlation revisted

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От Andrew Dunstan
Тема Re: cross column correlation revisted
Дата
Msg-id 4C3DCAF3.4000401@dunslane.net
обсуждение исходный текст
Ответ на Re: cross column correlation revisted  (Tom Lane <tgl@sss.pgh.pa.us>)
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Tom Lane wrote:
> If the combination of columns is actually interesting, there might well
> be an index in place, or the DBA might be willing to create it.  

I'm having a hard time imagining an interesting case where that wouldn't 
be so.

> For
> that matter, have you considered the idea of examining the index
> contents to derive the statistics?  Might work better than trying to get
> numbers via ANALYZE.
>
>   

Sounds like a good idea.

cheers

andrew


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