jian he <jian.universal...@gmail.com> writes: > column "salary" int data type works fine. But it does not work if the > "salary" column data type is numeric.
Your problem is that numeric is not a primitive C type:
> PG_RETURN_BOOL(DatumGetNumericCopy(salary) > limit);
That is comparing two pointers-to-numerics, not the values of
the numerics. You'd need to invoke numeric_cmp() if you
want a sensible result.
regards, tom lane
