Re: select count(*) status these days

On 19/10/10 11:15, Dennis Gearon wrote:
> I'm about to launch an in house 'Aplpha' stage project. One of the marketing driven outputs on the page is filled by a:
>
> SELECT
>    COUNT(*)
> WHERE
>    date_field IS NOT NULL AND
>    date_field>  :todays_date;
>
> Last I heard, this kind of query is kind of slow on Postgres in particular, (Love postgres otherwise). Is this still true?

That depends on the selectivity of your where clause, nothing else. If 
date_field is indexed and pretty selective, it'll be quick.

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