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 = 18 and p_type like '%NICKEL' and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'ASIA' 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 = 'ASIA' ) order by s_acctbal desc, n_name, s_name, p_partkey LIMIT 100; QUERY PLAN --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Limit (cost=806691.40..806691.41 rows=1 width=190) (actual time=11655.989..11656.015 rows=100 loops=1) Buffers: shared hit=1709200 read=163684 written=182 -> Sort (cost=806691.40..806691.41 rows=1 width=190) (actual time=11655.985..11656.002 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=1709200 read=163684 written=182 -> Merge Join (cost=381650.08..806691.39 rows=1 width=190) (actual time=9157.313..11649.895 rows=4612 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1609 Buffers: shared hit=1709192 read=163684 written=182 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=8049 width=30) (actual time=0.086..1090.629 rows=7748 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 18)) Rows Removed by Filter: 1992252 Buffers: shared hit=34069 read=12672 written=16 -> Sort (cost=381649.66..385649.66 rows=1600000 width=168) (actual time=9156.915..9543.840 rows=1602920 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 474939kB Buffers: shared hit=1526209 read=143473 written=152 -> Nested Loop (cost=2.00..216772.53 rows=1600000 width=168) (actual time=0.142..6972.734 rows=1602960 loops=1) Buffers: shared hit=1526209 read=143473 written=152 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.084..184.558 rows=20037 loops=1) Join Filter: (nation.n_regionkey = region.r_regionkey) Rows Removed by Join Filter: 79963 Buffers: shared hit=2181 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.009..0.012 rows=1 loops=1) Filter: (r_name = 'ASIA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=1 -> Hash Join (cost=1.56..4555.56 rows=100000 width=168) (actual time=0.059..157.485 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=0.011..54.902 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.027..0.027 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=0.005..0.013 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=0.024..0.302 rows=80 loops=20037) Index Cond: (ps_suppkey = supplier.s_suppkey) Buffers: shared hit=1524028 read=143473 written=152 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.067..0.067 rows=1 loops=6221) Buffers: shared hit=148914 read=7539 written=14 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.045..0.065 rows=2 loops=6221) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=148914 read=7539 written=14 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.003 rows=1 loops=6221) Filter: (r_name = 'ASIA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6221 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.032..0.061 rows=4 loops=6221) Buffers: shared hit=142693 read=7539 written=14 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.029..0.051 rows=4 loops=6221) Buffers: shared hit=92925 read=7539 written=14 -> Index Scan using pk_partsupp on partsupp partsupp_1 (cost=0.43..13.75 rows=4 width=8) (actual time=0.022..0.024 rows=4 loops=6221) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=18152 read=7539 written=14 -> Index Scan using pk_supplier on supplier supplier_1 (cost=0.29..8.31 rows=1 width=8) (actual time=0.005..0.006 rows=1 loops=24884) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=74773 -> 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=24884) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=49768 Planning time: 8.736 ms Execution time: 11697.252 ms (68 rows) COMMIT; COMMIT