row-by-row approach is necessary, but it can be inefficient. If it is

possible for the foreign server to determine which rows should be

modified without actually retrieving them, and if there are no local

triggers which would affect the operation, then it is possible to

arrange things so that the entire operation is performed on the remote

server. The interfaces described below make this possible.

structures which would affect the operation (row-level local triggers

or <literal>WITH CHECK OPTION</literal> constraints from parent views),

then it is possible to arrange things so that the entire operation is

performed on the remote server. The interfaces described below make

this possible.

</para>

<para>