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 = 29 and p_type like '%BRASS' 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=806105.16..806105.16 rows=1 width=190) (actual time=8059.451..8059.482 rows=100 loops=1) Buffers: shared hit=1833772 read=41863 written=23 -> Sort (cost=806105.16..806105.16 rows=1 width=190) (actual time=8059.447..8059.461 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=1833772 read=41863 written=23 -> Merge Join (cost=381650.08..806105.15 rows=1 width=190) (actual time=5731.637..8053.005 rows=4676 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1629 Buffers: shared hit=1833764 read=41863 written=23 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=8034 width=30) (actual time=0.989..1036.359 rows=8058 loops=1) Filter: (((p_type)::text ~~ '%BRASS'::text) AND (p_size = 29)) Rows Removed by Filter: 1991942 Buffers: shared hit=46725 read=16 -> Sort (cost=381649.66..385649.66 rows=1600000 width=168) (actual time=5730.115..6097.687 rows=1603330 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1632624 read=37655 written=22 -> Nested Loop (cost=2.00..216772.53 rows=1600000 width=168) (actual time=0.104..3926.866 rows=1603360 loops=1) Buffers: shared hit=1632624 read=37655 written=22 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.083..103.203 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=0.009..0.009 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=0.063..87.936 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=0.014..34.778 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.031..0.031 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=0.014..0.171 rows=80 loops=20042) Index Cond: (ps_suppkey = supplier.s_suppkey) Buffers: shared hit=1630443 read=37655 written=22 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.065..0.065 rows=1 loops=6305) Buffers: shared hit=154415 read=4192 written=1 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.042..0.063 rows=2 loops=6305) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=154415 read=4192 written=1 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.003 rows=1 loops=6305) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6305 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.028..0.059 rows=4 loops=6305) Buffers: shared hit=148110 read=4192 written=1 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.024..0.048 rows=4 loops=6305) Buffers: shared hit=97670 read=4192 written=1 -> Index Scan using pk_partsupp on partsupp partsupp_1 (cost=0.43..13.75 rows=4 width=8) (actual time=0.017..0.019 rows=4 loops=6305) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=21884 read=4192 written=1 -> 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=25220) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=75786 -> Index Scan using pk_nation on nation nation_1 (cost=0.14..0.16 rows=1 width=8) (actual time=0.002..0.002 rows=1 loops=25220) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=50440 Planning time: 8.549 ms Execution time: 8106.628 ms (68 rows) COMMIT; COMMIT