-1.1--2.0.sql</TT
> are
     available, <TT
CLASS="COMMAND"
>ALTER EXTENSION</TT
> will apply them in sequence if an
     update to version <TT
CLASS="LITERAL"
>2.0</TT
> is requested when <TT
CLASS="LITERAL"
>1.0</TT
> is
     currently installed.
    </P
><P
>     <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> doesn't assume anything about the properties
     of version names: for example, it does not know whether <TT
CLASS="LITERAL"
>1.1</TT
>
     follows <TT
CLASS="LITERAL"
>1.0</TT
>.  It just matches 