Jim Nasby <Jim(dot)Nasby(at)BlueTreble(dot)com> writes:
> Is there a reason not to allow $SUBJECT? Specifically, it'd be nice to
> be able to do something like WHEN tag LIKE 'ALTER%'.
Seems like it would be a seriously bad idea for such an expression to be
able to invoke arbitrary SQL code. What if it calls a user-defined
function that tries to do DDL?
regards, tom lane