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 '%NICKEL' and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'EUROPE' 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 = 'EUROPE' ) order by s_acctbal desc, n_name, s_name, p_partkey LIMIT 100; QUERY PLAN --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Limit (cost=806200.79..806200.80 rows=1 width=190) (actual time=10263.899..10263.932 rows=100 loops=1) Buffers: shared hit=1662847 read=213356 written=129 -> Sort (cost=806200.79..806200.80 rows=1 width=190) (actual time=10263.896..10263.916 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=1662847 read=213356 written=129 -> Merge Join (cost=381554.45..806200.78 rows=1 width=190) (actual time=7193.530..10257.388 rows=4727 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1636 Buffers: shared hit=1662839 read=213356 written=129 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=8081 width=30) (actual time=0.186..1372.068 rows=8076 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 8)) Rows Removed by Filter: 1991924 Buffers: shared hit=2568 read=44173 written=26 -> Sort (cost=381554.03..385551.87 rows=1599136 width=168) (actual time=7191.770..7702.445 rows=1602612 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1504642 read=164784 written=100 -> Nested Loop (cost=2.00..216772.17 rows=1599136 width=168) (actual time=0.107..4862.245 rows=1602640 loops=1) Buffers: shared hit=1504642 read=164784 written=100 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.061..102.283 rows=20033 loops=1) Join Filter: (nation.n_regionkey = region.r_regionkey) Rows Removed by Join Filter: 79967 Buffers: shared hit=2181 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.006..0.010 rows=1 loops=1) Filter: (r_name = 'EUROPE'::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..87.637 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..34.334 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.019..0.019 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..0.007 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..0.216 rows=80 loops=20033) Index Cond: (ps_suppkey = supplier.s_suppkey) Buffers: shared hit=1502461 read=164784 written=100 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.064..0.064 rows=1 loops=6363) Buffers: shared hit=155629 read=4399 written=3 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.041..0.062 rows=2 loops=6363) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=155629 read=4399 written=3 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.003 rows=1 loops=6363) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6363 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.027..0.058 rows=4 loops=6363) Buffers: shared hit=149266 read=4399 written=3 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.025..0.049 rows=4 loops=6363) Buffers: shared hit=98362 read=4399 written=3 -> 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=6363) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=21875 read=4399 written=3 -> Index Scan using pk_supplier on supplier supplier_1 (cost=0.29..8.31 rows=1 width=8) (actual time=0.006..0.007 rows=1 loops=25452) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=76487 -> 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=25452) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=50904 Planning time: 5.355 ms Execution time: 10299.300 ms (68 rows) COMMIT; COMMIT