Max Vaschenko <max(at)nino(dot)ru> writes:
> All seems ok, but how about next ?
> SELECT upd('aaa',null);
> <null>
This is fixed in 7.1. It's unfixable in prior releases because the
old function manager only maintained one argument-is-null flag for a
function call ... so *all* the arguments are taken as null if any are.
regards, tom lane