Re: improve docs on min()/max() performance

Patch applied. Thanks.

---------------------------------------------------------------------------

Neil Conway wrote:
> This patch adds a note to the documentation describing why the
> performance of min() and max() is slow when applied to the entire table,
> and suggesting the simple workaround most experienced Pg users
> eventually learn about (SELECT xyz ... ORDER BY xyz LIMIT 1).
>
> Any suggestions on improving the wording of this section would be
> welcome.
>
> Cheers,
>
> Neil
> --
> Neil Conway <neilc(at)samurai(dot)com> || PGP Key ID: DB3C29FC
>
>

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