>
> So I guess really can't get worked up about the idea of propagating
> this information through the type system.  Even suppose we eventually
> take the steps you suggesting and make it so that varchar(30) ||
> varchar(40) yields varchar(70).  What good is that?

I see main sense in enhancing warning system in plpgsql - or other SQL
PL languages. When you use % reftypes - then there are potential risk
so space (variable, column) isn't well dimensioned.

Pavel

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