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 = 15 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=793091.08..793091.08 rows=1 width=190) (actual time=9273.057..9273.090 rows=100 loops=1) Buffers: shared hit=1780118 read=97124 written=112 -> Sort (cost=793091.08..793091.08 rows=1 width=190) (actual time=9273.056..9273.078 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=1780118 read=97124 written=112 -> Merge Join (cost=381398.14..793091.07 rows=1 width=190) (actual time=6592.188..9267.557 rows=4670 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1677 Buffers: shared hit=1780110 read=97124 written=112 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=7718 width=30) (actual time=0.016..1018.628 rows=7959 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 15)) Rows Removed by Filter: 1992041 Buffers: shared hit=41277 read=5464 written=3 -> Sort (cost=381397.71..385392.00 rows=1597715 width=168) (actual time=6590.730..7143.340 rows=1603977 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 475236kB Buffers: shared hit=1583600 read=87253 written=103 -> Nested Loop (cost=2.00..216772.52 rows=1597715 width=168) (actual time=0.066..4475.971 rows=1604080 loops=1) Buffers: shared hit=1583600 read=87253 written=103 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.051..110.857 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=0.005..0.011 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=0.041..94.616 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..36.081 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.020..0.020 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..0.005 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=0.017..0.196 rows=80 loops=20051) Index Cond: (ps_suppkey = supplier.s_suppkey) Buffers: shared hit=1581419 read=87253 written=103 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.061..0.062 rows=1 loops=6347) Buffers: shared hit=155233 read=4407 written=6 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.039..0.059 rows=2 loops=6347) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=155233 read=4407 written=6 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.002 rows=1 loops=6347) Filter: (r_name = 'AMERICA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6347 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.027..0.056 rows=4 loops=6347) Buffers: shared hit=148886 read=4407 written=6 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.024..0.046 rows=4 loops=6347) Buffers: shared hit=98110 read=4407 written=6 -> Index Scan using pk_partsupp on partsupp partsupp_1 (cost=0.43..13.75 rows=4 width=8) (actual time=0.017..0.018 rows=4 loops=6347) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=21805 read=4407 written=6 -> 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=25388) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=76305 -> 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=25388) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=50776 Planning time: 6.026 ms Execution time: 9315.880 ms (68 rows) COMMIT; COMMIT