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 = 30 and p_type like '%TIN' 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=802343.38..802343.39 rows=1 width=190) (actual time=6928.578..6928.603 rows=100 loops=1) Buffers: shared hit=1805514 read=76084 written=157 -> Sort (cost=802343.38..802343.39 rows=1 width=190) (actual time=6928.577..6928.591 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=1805514 read=76084 written=157 -> Merge Join (cost=381649.99..802343.37 rows=1 width=190) (actual time=4501.127..6923.448 rows=4809 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1734 Buffers: shared hit=1805506 read=76084 written=157 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=7938 width=30) (actual time=0.309..1169.920 rows=8008 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 30)) Rows Removed by Filter: 1991992 Buffers: shared hit=756 read=45985 written=33 -> Sort (cost=381649.56..385649.56 rows=1600000 width=168) (actual time=4500.424..4825.896 rows=1603025 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1644522 read=25757 written=121 -> Nested Loop (cost=2.00..216772.44 rows=1600000 width=168) (actual time=0.064..3329.619 rows=1603360 loops=1) Buffers: shared hit=1644522 read=25757 written=121 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.053..92.158 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=0.005..0.005 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=0.041..78.673 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..31.398 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=0.004..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=0.013..0.141 rows=80 loops=20042) Index Cond: (ps_suppkey = supplier.s_suppkey) Buffers: shared hit=1642341 read=25757 written=121 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.054..0.054 rows=1 loops=6543) Buffers: shared hit=160228 read=4342 written=3 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.035..0.052 rows=2 loops=6543) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=160228 read=4342 written=3 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.002 rows=1 loops=6543) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6543 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.023..0.049 rows=4 loops=6543) Buffers: shared hit=153685 read=4342 written=3 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.021..0.040 rows=4 loops=6543) Buffers: shared hit=101341 read=4342 written=3 -> Index Scan using pk_partsupp on partsupp partsupp_1 (cost=0.43..13.75 rows=4 width=8) (actual time=0.014..0.016 rows=4 loops=6543) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22686 read=4342 written=3 -> 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=26172) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=78655 -> Index Scan using pk_nation on nation nation_1 (cost=0.14..0.16 rows=1 width=8) (actual time=0.001..0.001 rows=1 loops=26172) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=52344 Planning time: 4.862 ms Execution time: 6946.638 ms (68 rows) COMMIT; COMMIT