Alvaro Herrera wrote: > Now, the hard question is deciding what to keep track of. I don't > think MCV makes much sense, because what's the MCV of two columns?
The combination that occurs most often. -- Peter Eisentraut http://developer.postgresql.org/~petere/ ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match
