> Thanks. That was what i was looking for. It's been real useful!
> I also put this other line to handle the inverse case (NULL = field)
>
> | NULL_P '=' a_expr
> { $$ = makeA_Expr(ISNULL, NULL, $3, NULL); }
This leads to a shift/reduce conflict in yacc. I've been working on this
a bit, and have modified gram.y (so far just in my local copy) to allow
Jose's syntax and to allow the same syntax in a constraint declaration.
But this variant may be tougher to do correctly...
- Tom
