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 0.05 - 0.01 and 0.05 + 0.01 and l_quantity < 25; QUERY PLAN ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Aggregate (cost=1473826.88..1473826.89 rows=1 width=8) (actual time=22142.226..22142.227 rows=1 loops=1) Buffers: shared hit=370362 read=661628 written=1108 -> Bitmap Heap Scan on lineitem (cost=192964.94..1469805.37 rows=804302 width=8) (actual time=9616.297..21967.688 rows=795701 loops=1) Recheck Cond: ((l_shipdate >= '1995-01-01'::date) AND (l_shipdate < '1996-01-01'::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: 8310645 Heap Blocks: exact=1007104 Buffers: shared hit=370362 read=661628 written=1108 -> Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx (cost=0.00..192763.86 rows=9211930 width=0) (actual time=8785.801..8785.801 rows=9142953 loops=1) Index Cond: ((l_shipdate >= '1995-01-01'::date) AND (l_shipdate < '1996-01-01'::date)) Buffers: shared hit=1173 read=23713 written=1069 Planning time: 1.940 ms Execution time: 22155.333 ms (13 rows) COMMIT; COMMIT