.  Also, some parameters
     require superuser permission to change via <TT
CLASS="COMMAND"
>SET</TT
> or
     <TT
CLASS="COMMAND"
>ALTER</TT
>.
    </P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="CONFIG-SETTING-EXAMINING"
>18.1.4. Examining Parameter Settings</A
></H2
><P
>     The <A
HREF="sql-show.html"
>SHOW</A
>
     command allows inspection of the current values of all parameters.
    </P
><P
>     The virtual table <TT
CLASS="STRUCTNAME"
>pg_settings</TT
> also allows
     displaying an