
>NULL</TT
> if
     there is no available update path.  The path is shown in textual form
     with <TT
CLASS="LITERAL"
>--</TT
> separators.  You can use
     <TT
CLASS="LITERAL"
>regexp_split_to_array(path,'--')</TT
> if you prefer an array
     format.
    </P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN55114"
>35.15.5. Extension Example</A
></H2
><P
>     Here is a complete example of an <ACRONYM
CLASS="ACRONYM"
>SQL</ACRONYM
>-only
     extension, a two-element composite type that can s