EF="functions-info.html#FUNCTIONS-INFO-CATALOG-TABLE"
><TT
CLASS="LITERAL"
>COLLATION
        FOR</TT
></A
> on expressions (Peter Eisentraut)
       </P
><P
>        This returns a string representing the collation of the expression.
       </P
></LI
><LI
><P
>        Add <A
HREF="functions-info.html#FUNCTIONS-INFO-SCHEMA-TABLE"
><CODE
CLASS="FUNCTION"
>pg_opfamily_is_visible()</CODE
></A
>
        (Josh Kupershmidt)
       </P
></LI
><LI
><P
>        Add a <TT
CLASS="TYPE"
>numeric</TT
> variant of <A
HRE