>attached</em> to the index on the parent using
     <code class="command">ALTER INDEX .. ATTACH PARTITION</code>.  Once indexes for all
     partitions are attached to the parent index, the parent index is marked
     valid automatically.  Example:
</p><pre class="programlisting">
CREATE INDEX measurement_usls_idx ON ONLY measurement (unitsales);

CREATE INDEX CONCURRENTLY measurement_usls_200602_idx
    ON measurement_y2006m02 (unitsales);
ALTER INDEX measurement_usls_idx
    ATTACH PARTITION measurement_