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 = 28 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=805548.75..805548.76 rows=1 width=190) (actual time=12598.954..12598.986 rows=100 loops=1) Buffers: shared hit=1601799 read=277108 written=4390 -> Sort (cost=805548.75..805548.76 rows=1 width=190) (actual time=12598.951..12598.972 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=1601799 read=277108 written=4390 -> Merge Join (cost=381398.14..805548.74 rows=1 width=190) (actual time=9312.123..12591.958 rows=4755 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1684 Buffers: shared hit=1601791 read=277108 written=4390 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=8038 width=30) (actual time=0.069..1352.543 rows=8029 loops=1) Filter: (((p_type)::text ~~ '%BRASS'::text) AND (p_size = 28)) Rows Removed by Filter: 1991971 Buffers: shared hit=757 read=45984 written=259 -> Sort (cost=381397.71..385392.00 rows=1597715 width=168) (actual time=9311.451..9978.355 rows=1603247 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1443789 read=226490 written=4101 -> Nested Loop (cost=2.00..216772.52 rows=1597715 width=168) (actual time=0.068..6031.751 rows=1603360 loops=1) Buffers: shared hit=1443789 read=226490 written=4101 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.058..113.929 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..0.008 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=0.043..97.915 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..37.022 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.020..0.020 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..0.011 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=0.017..0.273 rows=80 loops=20042) Index Cond: (ps_suppkey = supplier.s_suppkey) Buffers: shared hit=1441608 read=226490 written=4101 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.070..0.070 rows=1 loops=6439) Buffers: shared hit=157245 read=4634 written=30 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.046..0.068 rows=2 loops=6439) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=157245 read=4634 written=30 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.003 rows=1 loops=6439) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6439 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.030..0.064 rows=4 loops=6439) Buffers: shared hit=150806 read=4634 written=30 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.027..0.054 rows=4 loops=6439) Buffers: shared hit=99295 read=4633 written=30 -> Index Scan using pk_partsupp on partsupp partsupp_1 (cost=0.43..13.75 rows=4 width=8) (actual time=0.018..0.020 rows=4 loops=6439) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=21857 read=4633 written=30 -> Index Scan using pk_supplier on supplier supplier_1 (cost=0.29..8.31 rows=1 width=8) (actual time=0.007..0.007 rows=1 loops=25756) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=77438 -> 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=25756) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=51511 read=1 Planning time: 5.842 ms Execution time: 12664.357 ms (68 rows) COMMIT; COMMIT