andrew wrote: > But the function foo() would produce different values for the two > queries, so the result will be different. > A simple example is foo() computes the sum of all the integer fields > of the input record.
OK, I see now where you're getting at. You want to combine the record type of A and B into one. Then the proposed solution is right. -- 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
