 crash if there had been a <TT
CLASS="LITERAL"
>BEFORE
      ROW</TT
> trigger fired for the same update.
     </P
></LI
><LI
><P
>      Fix performance problem when constructing a large, lossy bitmap
      (Tom Lane)
     </P
></LI
><LI
><P
>      Fix join selectivity estimation for unique columns (Tom Lane)
     </P
><P
>      This fixes an erroneous planner heuristic that could lead to poor
      estimates of the result size of a join.
     </P
></LI
><LI
><P
>      Fix nested PlaceHolderVar expressions 