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 = 14 and p_type like '%COPPER' 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=805663.66..805663.66 rows=1 width=190) (actual time=12741.850..12741.870 rows=100 loops=1) Buffers: shared hit=1458204 read=419116 written=15606 -> Sort (cost=805663.66..805663.66 rows=1 width=190) (actual time=12741.848..12741.857 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=1458204 read=419116 written=15606 -> Merge Join (cost=381648.19..805663.65 rows=1 width=190) (actual time=10365.067..12736.647 rows=4667 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1705 Buffers: shared hit=1458196 read=419116 written=15606 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=8022 width=30) (actual time=0.167..1151.048 rows=7972 loops=1) Filter: (((p_type)::text ~~ '%COPPER'::text) AND (p_size = 14)) Rows Removed by Filter: 1992028 Buffers: shared hit=2875 read=43866 written=175 -> Sort (cost=381647.76..385647.76 rows=1600000 width=168) (actual time=10364.490..10718.671 rows=1603289 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1300349 read=369930 written=15417 -> Nested Loop (cost=2.00..216770.64 rows=1600000 width=168) (actual time=0.068..8069.259 rows=1603360 loops=1) Buffers: shared hit=1300349 read=369930 written=15417 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.053..116.213 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=0.006..0.006 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=0.039..100.497 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..37.357 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.018..0.018 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=0.002..0.006 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=0.018..0.374 rows=80 loops=20042) Index Cond: (ps_suppkey = supplier.s_suppkey) Buffers: shared hit=1298168 read=369930 written=15417 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.057..0.057 rows=1 loops=6372) Buffers: shared hit=154972 read=5320 written=14 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.037..0.055 rows=2 loops=6372) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=154972 read=5320 written=14 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.002 rows=1 loops=6372) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6372 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.024..0.051 rows=4 loops=6372) Buffers: shared hit=148600 read=5320 written=14 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.022..0.042 rows=4 loops=6372) Buffers: shared hit=97624 read=5320 written=14 -> 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=6372) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=21032 read=5320 written=14 -> Index Scan using pk_supplier on supplier supplier_1 (cost=0.29..8.31 rows=1 width=8) (actual time=0.005..0.005 rows=1 loops=25488) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=76592 -> 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=25488) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=50976 Planning time: 6.139 ms Execution time: 12791.561 ms (68 rows) COMMIT; COMMIT