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 = 47 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=804637.48..804637.48 rows=1 width=190) (actual time=7682.346..7682.371 rows=100 loops=1) Buffers: shared hit=1778826 read=102295 written=3094 -> Sort (cost=804637.48..804637.48 rows=1 width=190) (actual time=7682.343..7682.357 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=1778826 read=102295 written=3094 -> Merge Join (cost=381554.45..804637.47 rows=1 width=190) (actual time=5160.125..7676.266 rows=4828 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1672 Buffers: shared hit=1778818 read=102295 written=3094 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=8040 width=30) (actual time=0.472..1192.479 rows=8094 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 47)) Rows Removed by Filter: 1991906 Buffers: shared hit=3130 read=43611 written=420 -> Sort (cost=381554.03..385551.87 rows=1599136 width=168) (actual time=5158.887..5502.735 rows=1603859 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 475236kB Buffers: shared hit=1617274 read=53579 written=2626 -> Nested Loop (cost=2.00..216772.17 rows=1599136 width=168) (actual time=0.071..3810.085 rows=1604080 loops=1) Buffers: shared hit=1617274 read=53579 written=2626 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.053..103.625 rows=20051 loops=1) Join Filter: (nation.n_regionkey = region.r_regionkey) Rows Removed by Join Filter: 79949 Buffers: shared hit=2181 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.006..0.009 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=0.043..88.002 rows=100000 loops=1) Hash Cond: (supplier.s_nationkey = nation.n_nationkey) Buffers: shared hit=2180 -> Seq Scan on supplier (cost=0.00..3179.00 rows=100000 width=142) (actual time=0.007..34.192 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.021..0.021 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=0.004..0.008 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=0.015..0.163 rows=80 loops=20051) Index Cond: (ps_suppkey = supplier.s_suppkey) Buffers: shared hit=1615093 read=53579 written=2626 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.057..0.057 rows=1 loops=6500) Buffers: shared hit=158414 read=5105 written=48 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.036..0.055 rows=2 loops=6500) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=158414 read=5105 written=48 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.002 rows=1 loops=6500) Filter: (r_name = 'AMERICA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6500 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.024..0.051 rows=4 loops=6500) Buffers: shared hit=151914 read=5105 written=48 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.022..0.042 rows=4 loops=6500) Buffers: shared hit=99914 read=5105 written=48 -> Index Scan using pk_partsupp on partsupp partsupp_1 (cost=0.43..13.75 rows=4 width=8) (actual time=0.015..0.017 rows=4 loops=6500) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=21767 read=5105 written=48 -> Index Scan using pk_supplier on supplier supplier_1 (cost=0.29..8.31 rows=1 width=8) (actual time=0.005..0.005 rows=1 loops=26000) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=78147 -> 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=26000) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=52000 Planning time: 5.998 ms Execution time: 7701.079 ms (68 rows) COMMIT; COMMIT