ent_y2007m11  (cost=0.00..33.12 rows=617 width=0)
               Filter: (logdate &gt;= '2008-01-01'::date)
         -&gt;  Seq Scan on measurement_y2007m12  (cost=0.00..33.12 rows=617 width=0)
               Filter: (logdate &gt;= '2008-01-01'::date)
         -&gt;  Seq Scan on measurement_y2008m01  (cost=0.00..33.12 rows=617 width=0)
               Filter: (logdate &gt;= '2008-01-01'::date)
</pre><p>

    Some or all of the partitions might use index scans instead of
    full-table sequential scans, but t