BEGIN; BEGIN EXPLAIN (ANALYZE, BUFFERS) select sum(l_extendedprice * l_discount) as revenue from lineitem where l_shipdate >= date '1994-01-01' and l_shipdate < cast(date '1994-01-01' + interval '1 year' as date) and l_discount between 0.04 - 0.01 and 0.04 + 0.01 and l_quantity < 25; QUERY PLAN ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Aggregate (cost=1474142.95..1474142.96 rows=1 width=8) (actual time=27727.681..27727.682 rows=1 loops=1) Buffers: shared hit=268960 read=765967 written=1565 -> Bitmap Heap Scan on lineitem (cost=192313.06..1472167.89 rows=395011 width=8) (actual time=7542.757..27533.862 rows=397127 loops=1) Recheck Cond: ((l_shipdate >= '1994-01-01'::date) AND (l_shipdate < '1995-01-01'::date)) Filter: ((l_discount >= 0.03::double precision) AND (l_discount <= 0.05::double precision) AND (l_quantity < 25::double precision)) Rows Removed by Filter: 8711026 Buffers: shared hit=268960 read=765967 written=1565 -> Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx (cost=0.00..192214.31 rows=9199948 width=0) (actual time=6860.747..6860.747 rows=9163162 loops=1) Index Cond: ((l_shipdate >= '1994-01-01'::date) AND (l_shipdate < '1995-01-01'::date)) Buffers: shared hit=52 read=24814 written=2 Total runtime: 27736.057 ms (11 rows) COMMIT; COMMIT