he command string given
    to <TT
CLASS="COMMAND"
>EXECUTE</TT
> or one of its variants.  If you need to
    insert a varying value into such a command, do so as part of
    constructing the string value, or use <TT
CLASS="LITERAL"
>USING</TT
>, as illustrated in
    <A
HREF="plpgsql-statements.html#PLPGSQL-STATEMENTS-EXECUTING-DYN"
>Section 40.5.4</A
>.
   </P
><P
>    Variable substitution currently works only in <TT
CLASS="COMMAND"
>SELECT</TT
>,
    <TT
CLASS="COMMAND"
>INSERT</TT
>, <TT
CLASS="COMMAND