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 = 'INDONESIA' and n2.n_name = 'BRAZIL') or (n1.n_name = 'BRAZIL' and n2.n_name = 'INDONESIA') ) 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=2357130.26..2359025.43 rows=58313 width=64) (actual time=93036.007..93069.532 rows=4 loops=1) Buffers: shared hit=1004722 read=427480 dirtied=1060 written=1885 -> Sort (cost=2357130.26..2357276.04 rows=58313 width=64) (actual time=93024.713..93035.870 rows=58049 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: 9700kB Buffers: shared hit=1004722 read=427480 dirtied=1060 written=1885 -> Hash Join (cost=895215.60..2352514.34 rows=58313 width=64) (actual time=46295.240..92670.883 rows=58049 loops=1) Hash Cond: ((lineitem.l_suppkey = supplier.s_suppkey) AND (n1.n_nationkey = supplier.s_nationkey)) Buffers: shared hit=1004714 read=427480 dirtied=1060 written=1885 -> Hash Join (cost=890536.60..2317804.30 rows=1457817 width=72) (actual time=46176.220..88945.100 rows=1462291 loops=1) Hash Cond: (lineitem.l_orderkey = orders.o_orderkey) Buffers: shared hit=1002532 read=427480 dirtied=1060 written=1885 -> Bitmap Heap Scan on lineitem (cost=385971.24..1730270.86 rows=18237308 width=20) (actual time=15471.582..34319.876 rows=18247443 loops=1) Recheck Cond: ((l_shipdate >= '1995-01-01'::date) AND (l_shipdate <= '1996-12-31'::date)) Buffers: shared hit=742671 read=374289 dirtied=1060 written=1885 -> Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx (cost=0.00..381411.91 rows=18237308 width=0) (actual time=14811.247..14811.247 rows=18320255 loops=1) Index Cond: ((l_shipdate >= '1995-01-01'::date) AND (l_shipdate <= '1996-12-31'::date)) Buffers: shared read=49815 -> Hash (cost=489502.50..489502.50 rows=1205029 width=60) (actual time=30704.023..30704.023 rows=1205285 loops=1) Buckets: 131072 Batches: 1 Memory Usage: 108288kB Buffers: shared hit=259861 read=53191 -> Hash Join (cost=15638.06..489502.50 rows=1205029 width=60) (actual time=533.137..29578.457 rows=1205285 loops=1) Hash Cond: (orders.o_custkey = customer.c_custkey) Buffers: shared hit=259861 read=53191 -> Seq Scan on orders (cost=0.00..405283.20 rows=15074920 width=8) (actual time=0.018..5420.022 rows=15015000 loops=1) Buffers: shared hit=201760 read=52774 -> Hash (cost=14139.26..14139.26 rows=119904 width=60) (actual time=533.027..533.027 rows=120188 loops=1) Buckets: 16384 Batches: 1 Memory Usage: 10799kB Buffers: shared hit=58101 read=417 -> Nested Loop (cost=905.09..14139.26 rows=119904 width=60) (actual time=17.846..456.323 rows=120188 loops=1) Buffers: shared hit=58101 read=417 -> Nested Loop (cost=0.00..28.00 rows=2 width=60) (actual time=0.098..0.367 rows=2 loops=1) Join Filter: (((n1.n_name = 'INDONESIA'::bpchar) AND (n2.n_name = 'BRAZIL'::bpchar)) OR ((n1.n_name = 'BRAZIL'::bpchar) AND (n2.n_name = 'INDONESIA'::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=0.018..0.033 rows=25 loops=1) Buffers: shared hit=2 -> Materialize (cost=0.00..1.38 rows=25 width=30) (actual time=0.001..0.004 rows=25 loops=25) Buffers: shared hit=1 -> Seq Scan on nation n2 (cost=0.00..1.25 rows=25 width=30) (actual time=0.005..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=23.792..208.819 rows=60094 loops=2) Recheck Cond: (c_nationkey = n2.n_nationkey) Buffers: shared hit=58098 read=417 -> Bitmap Index Scan on customer_c_nationkey_c_custkey_idx (cost=0.00..890.09 rows=60000 width=0) (actual time=15.879..15.879 rows=60094 loops=2) Index Cond: (c_nationkey = n2.n_nationkey) Buffers: shared hit=2 read=333 -> Hash (cost=3179.00..3179.00 rows=100000 width=8) (actual time=117.641..117.641 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=0.015..72.628 rows=100000 loops=1) Buffers: shared hit=2179 Total runtime: 93106.944 ms (53 rows) COMMIT; COMMIT