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 = 18 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=808626.53..808626.53 rows=1 width=190) (actual time=11672.258..11672.285 rows=100 loops=1) Buffers: shared hit=1551491 read=320145 written=3303 -> Sort (cost=808626.53..808626.53 rows=1 width=190) (actual time=11672.256..11672.272 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=1551491 read=320145 written=3303 -> Merge Join (cost=381398.14..808626.52 rows=1 width=190) (actual time=8997.815..11666.316 rows=4612 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1571 Buffers: shared hit=1551483 read=320145 written=3303 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=8116 width=30) (actual time=0.090..1242.126 rows=7748 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 18)) Rows Removed by Filter: 1992252 Buffers: shared hit=10852 read=35889 written=119 -> Sort (cost=381397.71..385392.00 rows=1597715 width=168) (actual time=8997.505..9386.278 rows=1602615 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1389322 read=280104 written=3168 -> Nested Loop (cost=2.00..216772.52 rows=1597715 width=168) (actual time=0.114..7243.182 rows=1602640 loops=1) Buffers: shared hit=1389322 read=280104 written=3168 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.061..117.208 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=0.007..0.009 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=0.046..100.746 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=0.008..38.879 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.022..0.022 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..0.008 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=0.018..0.332 rows=80 loops=20033) Index Cond: (ps_suppkey = supplier.s_suppkey) Buffers: shared hit=1387141 read=280104 written=3168 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.064..0.064 rows=1 loops=6183) Buffers: shared hit=151309 read=4152 written=16 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.041..0.062 rows=2 loops=6183) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=151309 read=4152 written=16 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.003 rows=1 loops=6183) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6183 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.027..0.058 rows=4 loops=6183) Buffers: shared hit=145126 read=4152 written=16 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.024..0.048 rows=4 loops=6183) Buffers: shared hit=95662 read=4152 written=16 -> Index Scan using pk_partsupp on partsupp partsupp_1 (cost=0.43..13.75 rows=4 width=8) (actual time=0.016..0.018 rows=4 loops=6183) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=21368 read=4152 written=16 -> 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=24732) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=74294 -> 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=24732) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=49464 Planning time: 6.192 ms Execution time: 11703.366 ms (68 rows) COMMIT; COMMIT