BEGIN; BEGIN EXPLAIN (ANALYZE, BUFFERS) select supp_nation, cust_nation, l_year, sum(volume) as revenue from ( select n1.n_name as supp_nation, n2.n_name as cust_nation, extract(year from l_shipdate) as l_year, l_extendedprice * (1 - l_discount) as volume from supplier, lineitem, orders, customer, nation n1, nation n2 where s_suppkey = l_suppkey and o_orderkey = l_orderkey and c_custkey = o_custkey and s_nationkey = n1.n_nationkey and c_nationkey = n2.n_nationkey and ( (n1.n_name = 'INDIA' and n2.n_name = 'ARGENTINA') or (n1.n_name = 'ARGENTINA' and n2.n_name = 'INDIA') ) and l_shipdate between date '1995-01-01' and date '1996-12-31' ) as shipping group by supp_nation, cust_nation, l_year order by supp_nation, cust_nation, l_year; QUERY PLAN ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- GroupAggregate (cost=2372008.11..2373916.44 rows=58718 width=64) (actual time=90081.514..90113.395 rows=4 loops=1) Buffers: shared hit=745158 read=695990 written=6334 -> Sort (cost=2372008.11..2372154.90 rows=58718 width=64) (actual time=90071.454..90080.888 rows=58989 loops=1) Sort Key: n1.n_name, n2.n_name, (date_part('year'::text, (lineitem.l_shipdate)::timestamp without time zone)) Sort Method: quicksort Memory: 9832kB Buffers: shared hit=745158 read=695990 written=6334 -> Hash Join (cost=899921.60..2367357.20 rows=58718 width=64) (actual time=44599.837..89762.717 rows=58989 loops=1) Hash Cond: ((lineitem.l_suppkey = supplier.s_suppkey) AND (n1.n_nationkey = supplier.s_nationkey)) Buffers: shared hit=745150 read=695990 written=6334 -> Hash Join (cost=895242.60..2332438.27 rows=1467958 width=72) (actual time=44488.679..86429.804 rows=1463429 loops=1) Hash Cond: (lineitem.l_orderkey = orders.o_orderkey) Buffers: shared hit=742968 read=695990 written=6334 -> Bitmap Heap Scan on lineitem (cost=387271.52..1740922.00 rows=18364165 width=20) (actual time=16596.436..36586.505 rows=18246746 loops=1) Recheck Cond: ((l_shipdate >= '1995-01-01'::date) AND (l_shipdate <= '1996-12-31'::date)) Buffers: shared hit=431761 read=692624 written=5939 -> Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx (cost=0.00..382680.48 rows=18364165 width=0) (actual time=15877.518..15877.518 rows=18448242 loops=1) Index Cond: ((l_shipdate >= '1995-01-01'::date) AND (l_shipdate <= '1996-12-31'::date)) Buffers: shared read=49815 written=15 -> Hash (cost=492803.29..492803.29 rows=1213423 width=60) (actual time=27891.454..27891.454 rows=1200924 loops=1) Buckets: 131072 Batches: 1 Memory Usage: 107896kB Buffers: shared hit=311207 read=3366 written=395 -> Hash Join (cost=15638.06..492803.29 rows=1213423 width=60) (actual time=537.330..27141.517 rows=1200924 loops=1) Hash Cond: (orders.o_custkey = customer.c_custkey) Buffers: shared hit=311207 read=3366 written=395 -> Seq Scan on orders (cost=0.00..408106.27 rows=15179927 width=8) (actual time=0.014..4914.166 rows=15015000 loops=1) Buffers: shared hit=253108 read=3199 written=395 -> Hash (cost=14139.26..14139.26 rows=119904 width=60) (actual time=537.187..537.187 rows=120056 loops=1) Buckets: 16384 Batches: 1 Memory Usage: 10787kB Buffers: shared hit=58099 read=167 -> Nested Loop (cost=905.09..14139.26 rows=119904 width=60) (actual time=21.088..454.081 rows=120056 loops=1) Buffers: shared hit=58099 read=167 -> Nested Loop (cost=0.00..28.00 rows=2 width=60) (actual time=0.071..0.418 rows=2 loops=1) Join Filter: (((n1.n_name = 'INDIA'::bpchar) AND (n2.n_name = 'ARGENTINA'::bpchar)) OR ((n1.n_name = 'ARGENTINA'::bpchar) AND (n2.n_name = 'INDIA'::bpchar))) Rows Removed by Join Filter: 623 Buffers: shared hit=3 -> Index Scan using pk_nation on nation n1 (cost=0.00..12.63 rows=25 width=30) (actual time=0.011..0.031 rows=25 loops=1) Buffers: shared hit=2 -> Materialize (cost=0.00..1.38 rows=25 width=30) (actual time=0.001..0.003 rows=25 loops=25) Buffers: shared hit=1 -> Seq Scan on nation n2 (cost=0.00..1.25 rows=25 width=30) (actual time=0.003..0.008 rows=25 loops=1) Buffers: shared hit=1 -> Bitmap Heap Scan on customer (cost=905.09..6455.63 rows=60000 width=8) (actual time=23.404..207.514 rows=60028 loops=2) Recheck Cond: (c_nationkey = n2.n_nationkey) Buffers: shared hit=58096 read=167 -> Bitmap Index Scan on customer_c_nationkey_c_custkey_idx (cost=0.00..890.09 rows=60000 width=0) (actual time=15.165..15.165 rows=60028 loops=2) Index Cond: (c_nationkey = n2.n_nationkey) Buffers: shared hit=169 read=167 -> Hash (cost=3179.00..3179.00 rows=100000 width=8) (actual time=110.722..110.722 rows=100000 loops=1) Buckets: 16384 Batches: 1 Memory Usage: 3907kB Buffers: shared hit=2179 -> Seq Scan on supplier (cost=0.00..3179.00 rows=100000 width=8) (actual time=0.013..68.849 rows=100000 loops=1) Buffers: shared hit=2179 Total runtime: 90140.391 ms (53 rows) COMMIT; COMMIT