Manfred Koizar <[EMAIL PROTECTED]> 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 ---------------------------(end of broadcast)--------------------------- TIP 9: the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match