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 0.05 - 0.01 and 0.05 + 0.01 and l_quantity < 25; QUERY PLAN ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Aggregate (cost=1477698.24..1477698.25 rows=1 width=8) (actual time=21183.852..21183.852 rows=1 loops=1) Buffers: shared hit=434380 read=602261 dirtied=970 written=1511 -> Bitmap Heap Scan on lineitem (cost=192055.57..1473715.26 rows=796596 width=8) (actual time=7744.993..21011.985 rows=795668 loops=1) Recheck Cond: ((l_shipdate >= '1997-01-01'::date) AND (l_shipdate < '1998-01-01'::date)) Filter: ((l_discount >= 0.04::double precision) AND (l_discount <= 0.06::double precision) AND (l_quantity < 25::double precision)) Rows Removed by Filter: 8306647 Heap Blocks: exact=1011768 Buffers: shared hit=434380 read=602261 dirtied=970 written=1511 -> Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx (cost=0.00..191856.42 rows=9191986 width=0) (actual time=7012.294..7012.294 rows=9183725 loops=1) Index Cond: ((l_shipdate >= '1997-01-01'::date) AND (l_shipdate < '1998-01-01'::date)) Buffers: shared hit=582 read=24291 written=777 Planning time: 2.166 ms Execution time: 21190.368 ms (13 rows) COMMIT; COMMIT