BEGIN; BEGIN EXPLAIN (ANALYZE, BUFFERS) select sum(l_extendedprice * l_discount) as revenue from lineitem where l_shipdate >= date '1997-01-01' and l_shipdate < cast(date '1997-01-01' + interval '1 year' as date) and l_discount between 0.07 - 0.01 and 0.07 + 0.01 and l_quantity < 24; QUERY PLAN ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Aggregate (cost=1481846.45..1481846.46 rows=1 width=8) (actual time=17167.072..17167.072 rows=1 loops=1) Buffers: shared hit=333341 read=706448 written=378 -> Bitmap Heap Scan on lineitem (cost=192335.69..1477987.59 rows=771772 width=8) (actual time=4400.312..17001.223 rows=761910 loops=1) Recheck Cond: ((l_shipdate >= '1997-01-01'::date) AND (l_shipdate < '1998-01-01'::date)) Filter: ((l_discount >= 0.06::double precision) AND (l_discount <= 0.08::double precision) AND (l_quantity < 24::double precision)) Rows Removed by Filter: 8351095 Heap Blocks: exact=1014916 Buffers: shared hit=333341 read=706448 written=378 -> Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx (cost=0.00..192142.74 rows=9220618 width=0) (actual time=3908.904..3908.904 rows=9212081 loops=1) Index Cond: ((l_shipdate >= '1997-01-01'::date) AND (l_shipdate < '1998-01-01'::date)) Buffers: shared read=24873 written=46 Planning time: 1.777 ms Execution time: 17177.030 ms (13 rows) COMMIT; COMMIT