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 = 8 and p_type like '%TIN' and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'AMERICA' 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 = 'AMERICA' ) order by s_acctbal desc, n_name, s_name, p_partkey LIMIT 100; QUERY PLAN --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Limit (cost=799900.75..799900.75 rows=1 width=190) (actual time=16940.502..16940.542 rows=100 loops=1) Buffers: shared hit=1399066 read=478401 written=369 -> Sort (cost=799900.75..799900.75 rows=1 width=190) (actual time=16940.498..16940.524 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=1399066 read=478401 written=369 -> Merge Join (cost=381650.08..799900.74 rows=1 width=190) (actual time=13978.502..16933.813 rows=4674 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1678 Buffers: shared hit=1399058 read=478401 written=369 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=7875 width=30) (actual time=0.178..1300.136 rows=7933 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 8)) Rows Removed by Filter: 1992067 Buffers: shared hit=2190 read=44551 written=58 -> Sort (cost=381649.66..385649.66 rows=1600000 width=168) (actual time=13977.983..14453.343 rows=1603846 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 475236kB Buffers: shared hit=1245331 read=425522 written=304 -> Nested Loop (cost=2.00..216772.53 rows=1600000 width=168) (actual time=0.096..10609.863 rows=1604080 loops=1) Buffers: shared hit=1245331 read=425522 written=304 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.076..170.201 rows=20051 loops=1) Join Filter: (nation.n_regionkey = region.r_regionkey) Rows Removed by Join Filter: 79949 Buffers: shared hit=2181 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.008..0.013 rows=1 loops=1) Filter: (r_name = 'AMERICA'::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..147.080 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=0.016..49.565 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.026..0.026 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=0.022..0.488 rows=80 loops=20051) Index Cond: (ps_suppkey = supplier.s_suppkey) Buffers: shared hit=1243150 read=425522 written=304 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.077..0.077 rows=1 loops=6352) Buffers: shared hit=151537 read=8328 written=7 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.050..0.075 rows=2 loops=6352) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=151537 read=8328 written=7 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.003 rows=1 loops=6352) Filter: (r_name = 'AMERICA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6352 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.036..0.071 rows=4 loops=6352) Buffers: shared hit=145185 read=8328 written=7 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.033..0.061 rows=4 loops=6352) Buffers: shared hit=94369 read=8328 written=7 -> Index Scan using pk_partsupp on partsupp partsupp_1 (cost=0.43..13.75 rows=4 width=8) (actual time=0.025..0.027 rows=4 loops=6352) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=18000 read=8328 written=7 -> Index Scan using pk_supplier on supplier supplier_1 (cost=0.29..8.31 rows=1 width=8) (actual time=0.007..0.008 rows=1 loops=25408) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=76369 -> 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=25408) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=50816 Planning time: 9.048 ms Execution time: 16987.201 ms (68 rows) COMMIT; COMMIT