he behavior of the topmost
    <TT
CLASS="COMMAND"
>SELECT</TT
>, which we don't want.  However,
    collapsing the query tree is an optimization that the rewrite
    system doesn't have to concern itself with.
   </P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN56724"
>38.2.2. View Rules in Non-<TT
CLASS="COMMAND"
>SELECT</TT
> Statements</A
></H2
><P
>    Two details of the query tree aren't touched in the description of
    view rules above. These are the command type and the result relatio