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 = 35 and p_type like '%STEEL' and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'MIDDLE EAST' 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 = 'MIDDLE EAST' ) order by s_acctbal desc, n_name, s_name, p_partkey LIMIT 100; QUERY PLAN --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Limit (cost=802781.04..802781.05 rows=1 width=190) (actual time=9758.713..9758.748 rows=100 loops=1) Buffers: shared hit=1652222 read=227380 written=537 -> Sort (cost=802781.04..802781.05 rows=1 width=190) (actual time=9758.711..9758.732 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=1652222 read=227380 written=537 -> Merge Join (cost=381554.45..802781.03 rows=1 width=190) (actual time=6886.889..9752.365 rows=4749 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1714 Buffers: shared hit=1652214 read=227380 written=537 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=7993 width=30) (actual time=0.122..1186.591 rows=8078 loops=1) Filter: (((p_type)::text ~~ '%STEEL'::text) AND (p_size = 35)) Rows Removed by Filter: 1991922 Buffers: shared hit=757 read=45984 written=68 -> Sort (cost=381554.03..385551.87 rows=1599136 width=168) (actual time=6885.554..7497.011 rows=1603351 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1493302 read=176977 written=464 -> Nested Loop (cost=2.00..216772.17 rows=1599136 width=168) (actual time=0.080..4798.028 rows=1603360 loops=1) Buffers: shared hit=1493302 read=176977 written=464 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.070..102.183 rows=20042 loops=1) Join Filter: (nation.n_regionkey = region.r_regionkey) Rows Removed by Join Filter: 79958 Buffers: shared hit=2181 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.007..0.008 rows=1 loops=1) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=1 -> Hash Join (cost=1.56..4555.56 rows=100000 width=168) (actual time=0.047..87.263 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..34.028 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=0.003..0.009 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..0.214 rows=80 loops=20042) Index Cond: (ps_suppkey = supplier.s_suppkey) Buffers: shared hit=1491121 read=176977 written=464 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.056..0.056 rows=1 loops=6463) Buffers: shared hit=158155 read=4419 written=5 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.036..0.054 rows=2 loops=6463) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=158155 read=4419 written=5 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.002 rows=1 loops=6463) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6463 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.024..0.050 rows=4 loops=6463) Buffers: shared hit=151692 read=4419 written=5 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.021..0.042 rows=4 loops=6463) Buffers: shared hit=99988 read=4419 written=5 -> Index Scan using pk_partsupp on partsupp partsupp_1 (cost=0.43..13.75 rows=4 width=8) (actual time=0.015..0.016 rows=4 loops=6463) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22290 read=4419 written=5 -> 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=25852) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=77698 -> 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=25852) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=51704 Planning time: 5.733 ms Execution time: 9817.238 ms (68 rows) COMMIT; COMMIT