>

    are that the materialized view cannot subsequently be directly updated
    and that the query used to create the materialized view is stored in
    exactly the same way that a view's query is stored, so that fresh data
    can be generated for the materialized view with:

</P><PRE
CLASS="PROGRAMLISTING"
>REFRESH MATERIALIZED VIEW mymatview;</PRE
><P>

    The information about a materialized view in the
    <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> system catalogs is exactly
    the same as it is