Horton

Re: Group-count estimation statistics

Tom Lane <tgl@sss.pgh.pa.us>

View thread View on postgr.es
From: Tom Lane <tgl@sss.pgh.pa.us>
To: Manfred Koizar <mkoi-pg@aon.at>
Cc: pgsql-hackers@postgresql.org
Date: 2005-01-31T19:40:08Z
Lists: pgsql-hackers 
Manfred Koizar <mkoi-pg@aon.at> writes:
> That's not what I meant.  I tried to say that if we have a GROUP BY
> several columns and one of these columns alone has more than N/10
> distinct values, there's no way to get less than that many groups.

Oh, I see, you want a "max" calculation in there too.  Seems reasonable.
Any objections?

			regards, tom lane