BEGIN; BEGIN EXPLAIN (ANALYZE, BUFFERS) select s_acctbal, s_name, n_name, p_partkey, p_mfgr, s_address, s_phone, s_comment from part, supplier, partsupp, nation, region where p_partkey = ps_partkey and s_suppkey = ps_suppkey and p_size = 7 and p_type like '%TIN' and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'AMERICA' and ps_supplycost = ( select min(ps_supplycost) from partsupp, supplier, nation, region where p_partkey = ps_partkey and s_suppkey = ps_suppkey and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'AMERICA' ) order by s_acctbal desc, n_name, s_name, p_partkey LIMIT 100; QUERY PLAN --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Limit (cost=801054.22..801054.22 rows=1 width=190) (actual time=15260.218..15260.248 rows=100 loops=1) Buffers: shared hit=1264529 read=614168 written=13155 -> Sort (cost=801054.22..801054.22 rows=1 width=190) (actual time=15260.215..15260.236 rows=100 loops=1) Sort Key: supplier.s_acctbal, nation.n_name, supplier.s_name, part.p_partkey Sort Method: top-N heapsort Memory: 51kB Buffers: shared hit=1264529 read=614168 written=13155 -> Merge Join (cost=381398.14..801054.21 rows=1 width=190) (actual time=12338.868..15253.896 rows=4754 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1651 Buffers: shared hit=1264521 read=614168 written=13155 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=7923 width=30) (actual time=0.029..1211.873 rows=8133 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 7)) Rows Removed by Filter: 1991867 Buffers: shared hit=8097 read=38644 written=438 -> Sort (cost=381397.71..385392.00 rows=1597715 width=168) (actual time=12338.473..12861.722 rows=1603839 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 475236kB Buffers: shared hit=1100027 read=570826 written=12650 -> Nested Loop (cost=2.00..216772.52 rows=1597715 width=168) (actual time=0.088..10619.608 rows=1604080 loops=1) Buffers: shared hit=1100027 read=570826 written=12650 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.072..143.997 rows=20051 loops=1) Join Filter: (nation.n_regionkey = region.r_regionkey) Rows Removed by Join Filter: 79949 Buffers: shared hit=2178 read=3 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.007..0.013 rows=1 loops=1) Filter: (r_name = 'AMERICA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=1 -> Hash Join (cost=1.56..4555.56 rows=100000 width=168) (actual time=0.061..126.164 rows=100000 loops=1) Hash Cond: (supplier.s_nationkey = nation.n_nationkey) Buffers: shared hit=2177 read=3 -> Seq Scan on supplier (cost=0.00..3179.00 rows=100000 width=142) (actual time=0.010..45.405 rows=100000 loops=1) Buffers: shared hit=2176 read=3 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.025..0.025 rows=25 loops=1) Buckets: 1024 Batches: 1 Memory Usage: 10kB Buffers: shared hit=1 -> Seq Scan on nation (cost=0.00..1.25 rows=25 width=34) (actual time=0.003..0.007 rows=25 loops=1) Buffers: shared hit=1 -> Index Scan using partsupp_ps_suppkey_idx on partsupp (cost=0.43..9.75 rows=80 width=12) (actual time=0.020..0.496 rows=80 loops=20051) Index Cond: (ps_suppkey = supplier.s_suppkey) Buffers: shared hit=1097849 read=570823 written=12650 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.065..0.065 rows=1 loops=6405) Buffers: shared hit=156397 read=4698 written=67 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.042..0.063 rows=2 loops=6405) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=156397 read=4698 written=67 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.002 rows=1 loops=6405) Filter: (r_name = 'AMERICA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6405 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.028..0.059 rows=4 loops=6405) Buffers: shared hit=149992 read=4698 written=67 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.026..0.049 rows=4 loops=6405) Buffers: shared hit=98752 read=4698 written=67 -> Index Scan using pk_partsupp on partsupp partsupp_1 (cost=0.43..13.75 rows=4 width=8) (actual time=0.018..0.019 rows=4 loops=6405) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=21741 read=4697 written=67 -> Index Scan using pk_supplier on supplier supplier_1 (cost=0.29..8.31 rows=1 width=8) (actual time=0.006..0.006 rows=1 loops=25620) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=77011 read=1 -> Index Scan using pk_nation on nation nation_1 (cost=0.14..0.16 rows=1 width=8) (actual time=0.001..0.002 rows=1 loops=25620) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=51240 Planning time: 6.836 ms Execution time: 15299.397 ms (68 rows) COMMIT; COMMIT