"Jim C. Nasby" <[EMAIL PROTECTED]> writes:
> So does that mean a hash index could (theoretically) improve the
> performance of a hash join or hash aggregation?
I don't think so --- the whole point of a hash is to do your matching
in-memory, rather than jumping all over the disk for it ...
regards, tom lane
---------------------------(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
