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 = 39 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=807912.65..807912.66 rows=1 width=190) (actual time=7127.664..7127.688 rows=100 loops=1) Buffers: shared hit=1854892 read=24773 -> Sort (cost=807912.65..807912.66 rows=1 width=190) (actual time=7127.661..7127.674 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=1854892 read=24773 -> Merge Join (cost=381649.95..807912.64 rows=1 width=190) (actual time=4868.928..7122.872 rows=4788 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1712 Buffers: shared hit=1854884 read=24773 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=8094 width=30) (actual time=0.081..1072.690 rows=8078 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 39)) Rows Removed by Filter: 1991922 Buffers: shared hit=39090 read=7651 -> Sort (cost=381649.50..385649.50 rows=1600000 width=168) (actual time=4868.179..5200.797 rows=1602623 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1656792 read=12634 -> Nested Loop (cost=2.00..216772.37 rows=1600000 width=168) (actual time=0.166..3218.893 rows=1602640 loops=1) Buffers: shared hit=1656792 read=12634 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.105..95.873 rows=20033 loops=1) Join Filter: (nation.n_regionkey = region.r_regionkey) Rows Removed by Join Filter: 79967 Buffers: shared hit=2178 read=3 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.006..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=0.074..82.025 rows=100000 loops=1) Hash Cond: (supplier.s_nationkey = nation.n_nationkey) Buffers: shared hit=2177 read=3 -> Seq Scan on supplier (cost=0.00..3179.00 rows=100000 width=142) (actual time=0.007..33.421 rows=100000 loops=1) Buffers: shared hit=2176 read=3 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.045..0.045 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..0.020 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=0.013..0.137 rows=80 loops=20033) Index Cond: (ps_suppkey = supplier.s_suppkey) Buffers: shared hit=1654614 read=12631 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.055..0.055 rows=1 loops=6500) Buffers: shared hit=159002 read=4488 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.036..0.053 rows=2 loops=6500) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=159002 read=4488 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.002 rows=1 loops=6500) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6500 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.024..0.050 rows=4 loops=6500) Buffers: shared hit=152502 read=4488 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.022..0.041 rows=4 loops=6500) Buffers: shared hit=100502 read=4488 -> Index Scan using pk_partsupp on partsupp partsupp_1 (cost=0.43..13.75 rows=4 width=8) (actual time=0.015..0.017 rows=4 loops=6500) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22376 read=4488 -> Index Scan using pk_supplier on supplier supplier_1 (cost=0.29..8.31 rows=1 width=8) (actual time=0.005..0.005 rows=1 loops=26000) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=78126 -> Index Scan using pk_nation on nation nation_1 (cost=0.14..0.16 rows=1 width=8) (actual time=0.001..0.001 rows=1 loops=26000) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=52000 Planning time: 4.620 ms Execution time: 7171.215 ms (68 rows) COMMIT; COMMIT