BEGIN; BEGIN EXPLAIN (ANALYZE, BUFFERS) select sum(l_extendedprice * l_discount) as revenue from lineitem where l_shipdate >= date '1995-01-01' and l_shipdate < cast(date '1995-01-01' + interval '1 year' as date) and l_discount between 0.06 - 0.01 and 0.06 + 0.01 and l_quantity < 25; QUERY PLAN ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Aggregate (cost=1481682.58..1481682.59 rows=1 width=8) (actual time=18523.268..18523.269 rows=1 loops=1) Buffers: shared hit=762626 read=277467 dirtied=858 written=1626 -> Bitmap Heap Scan on lineitem (cost=192170.67..1477637.31 rows=809055 width=8) (actual time=6741.710..18330.425 rows=796312 loops=1) Recheck Cond: ((l_shipdate >= '1995-01-01'::date) AND (l_shipdate < '1996-01-01'::date)) Filter: ((l_discount >= 0.05::double precision) AND (l_discount <= 0.07::double precision) AND (l_quantity < 25::double precision)) Rows Removed by Filter: 8317546 Heap Blocks: exact=1015207 Buffers: shared hit=762626 read=277467 dirtied=858 written=1626 -> Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx (cost=0.00..191968.40 rows=9212384 width=0) (actual time=5854.326..5854.326 rows=9215273 loops=1) Index Cond: ((l_shipdate >= '1995-01-01'::date) AND (l_shipdate < '1996-01-01'::date)) Buffers: shared hit=4177 read=20709 written=24 Planning time: 3.239 ms Execution time: 18530.611 ms (13 rows) COMMIT; COMMIT