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 = 38 and p_type like '%NICKEL' and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'ASIA' 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 = 'ASIA' ) order by s_acctbal desc, n_name, s_name, p_partkey LIMIT 100; QUERY PLAN --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Limit (cost=810550.75..810550.75 rows=1 width=190) (actual time=8519.704..8519.731 rows=100 loops=1) Buffers: shared hit=1679925 read=198939 -> Sort (cost=810550.75..810550.75 rows=1 width=190) (actual time=8519.693..8519.712 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=1679925 read=198939 -> Merge Join (cost=381649.95..810550.74 rows=1 width=190) (actual time=6227.072..8514.800 rows=4725 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1733 Buffers: shared hit=1679917 read=198939 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=8162 width=30) (actual time=0.847..826.012 rows=8024 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 38)) Rows Removed by Filter: 1991976 Buffers: shared hit=41278 read=5463 -> Sort (cost=381649.50..385649.50 rows=1600000 width=168) (actual time=6225.034..6635.253 rows=1602842 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 474939kB Buffers: shared hit=1480923 read=188759 -> Nested Loop (cost=2.00..216772.37 rows=1600000 width=168) (actual time=0.136..4103.734 rows=1602960 loops=1) Buffers: shared hit=1480923 read=188759 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.090..101.507 rows=20037 loops=1) Join Filter: (nation.n_regionkey = region.r_regionkey) Rows Removed by Join Filter: 79963 Buffers: shared hit=4 read=2177 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.011..0.023 rows=1 loops=1) Filter: (r_name = 'ASIA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=1 -> Hash Join (cost=1.56..4555.56 rows=100000 width=168) (actual time=0.058..87.641 rows=100000 loops=1) Hash Cond: (supplier.s_nationkey = nation.n_nationkey) Buffers: shared hit=3 read=2177 -> Seq Scan on supplier (cost=0.00..3179.00 rows=100000 width=142) (actual time=0.003..39.450 rows=100000 loops=1) Buffers: shared hit=2 read=2177 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.029..0.029 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..0.013 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..0.179 rows=80 loops=20037) Index Cond: (ps_suppkey = supplier.s_suppkey) Buffers: shared hit=1480919 read=186582 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.045..0.045 rows=1 loops=6458) Buffers: shared hit=157716 read=4717 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.029..0.043 rows=2 loops=6458) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=157716 read=4717 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.001..0.002 rows=1 loops=6458) Filter: (r_name = 'ASIA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6458 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.020..0.040 rows=4 loops=6458) Buffers: shared hit=151258 read=4717 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.018..0.032 rows=4 loops=6458) Buffers: shared hit=99594 read=4717 -> Index Scan using pk_partsupp on partsupp partsupp_1 (cost=0.43..13.75 rows=4 width=8) (actual time=0.014..0.015 rows=4 loops=6458) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22213 read=4445 -> Index Scan using pk_supplier on supplier supplier_1 (cost=0.29..8.31 rows=1 width=8) (actual time=0.003..0.003 rows=1 loops=25832) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=77381 read=272 -> 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=25832) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=51664 Planning time: 8.654 ms Execution time: 8538.310 ms (68 rows) COMMIT; COMMIT