     ALL</TT
> for himself, or <TT
CLASS="LITERAL"
>ALTER DATABASE ... RESET ALL</TT
> for
      a database he owns, this would remove all special parameter settings
      for the user or database, even ones that are only supposed to be
      changeable by a superuser.  Now, the <TT
CLASS="COMMAND"
>ALTER</TT
> will only
      remove the parameters that the user has permission to change.
     </P
></LI
><LI
><P
>      Avoid possible crash during backend shutdown if shutdown occurs
      when a <TT
CLASS="LI