 expanded as normal,
    but another unexpanded range-table entry is added to the query
    to represent the view in its capacity as the result relation.</P
><P
>    The problem that now arises is how to identify the rows to be
    updated in the view. Recall that when the result relation
    is a table, a special <ACRONYM
CLASS="ACRONYM"
>CTID</ACRONYM
> entry is added to the target
    list to identify the physical locations of the rows to be updated.
    This does not work if the result relation is a vie