<LI
><P
>        Improve heuristics for determining the types of unknown values
        (Tom Lane)
       </P
><P
>        The longstanding rule that an unknown constant might have the
        same type as the value on the other side of the operator using it
        is now applied when considering polymorphic operators, not only
        for simple operator matches.
       </P
></LI
><LI
><P
>        Warn about creating casts to or from domain types (Robert Haas)
       </P
><P
>        Such casts have no ef