s optimizations that might allow view-protected
        data to be exposed to users, for example pushing a clause involving
        an insecure function into the <TT
CLASS="LITERAL"
>WHERE</TT
> clause of the view.
        Such views can be expected to perform more poorly than ordinary
        views.
       </P
></LI
><LI
><P
>        Add a new <A
HREF="sql-createfunction.html"
><TT
CLASS="LITERAL"
>LEAKPROOF</TT
></A
> function
        attribute to mark functions that can safely be pushed down
        into