andrew wrote: > I want to use a UDF to filter tuples t that are generated after a > join. More specifially, I have a UDF foo(record), which computes a > value for a given tuple. I can do the filtering before the join. > e.g.: > > select * from A, B where foo(A)<2 and A.a=B.b;
What makes you think that the filtering happens before the join here? And why would it matter? The results should be all the same. -- Peter Eisentraut http://developer.postgresql.org/~petere/ ---------------------------(end of broadcast)--------------------------- TIP 4: Have you searched our list archives? http://archives.postgresql.org
