which often is
      permanently empty.
     </P
></LI
><LI
><P
>      Allow nested <TT
CLASS="LITERAL"
>EXISTS</TT
> queries to be optimized properly (Tom
      Lane)
     </P
></LI
><LI
><P
>      Fix array- and path-creating functions to ensure padding bytes are
      zeroes (Tom Lane)
     </P
><P
>      This avoids some situations where the planner will think that
      semantically-equal constants are not equal, resulting in poor
      optimization.
     </P
></LI
><LI
><P
>      Fix <TT
CLASS="COMMAN