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 = 37 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=803856.08..803856.08 rows=1 width=190) (actual time=13677.050..13677.073 rows=100 loops=1) Buffers: shared hit=1664431 read=213589 written=1376 -> Sort (cost=803856.08..803856.08 rows=1 width=190) (actual time=13677.047..13677.056 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=1664431 read=213589 written=1376 -> Merge Join (cost=381648.19..803856.07 rows=1 width=190) (actual time=10976.328..13670.883 rows=4758 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1675 Buffers: shared hit=1664423 read=213589 written=1376 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=7976 width=30) (actual time=0.284..1243.248 rows=8051 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 37)) Rows Removed by Filter: 1991949 Buffers: shared hit=20179 read=26562 written=845 -> Sort (cost=381647.76..385647.76 rows=1600000 width=168) (actual time=10975.537..11384.367 rows=1602068 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1488009 read=181417 written=353 -> Nested Loop (cost=2.00..216770.64 rows=1600000 width=168) (actual time=0.092..7908.441 rows=1602640 loops=1) Buffers: shared hit=1488009 read=181417 written=353 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.057..127.956 rows=20033 loops=1) Join Filter: (nation.n_regionkey = region.r_regionkey) Rows Removed by Join Filter: 79967 Buffers: shared hit=2163 read=18 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.007..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..110.247 rows=100000 loops=1) Hash Cond: (supplier.s_nationkey = nation.n_nationkey) Buffers: shared hit=2162 read=18 -> Seq Scan on supplier (cost=0.00..3179.00 rows=100000 width=142) (actual time=0.007..38.021 rows=100000 loops=1) Buffers: shared hit=2161 read=18 -> 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=0.003..0.006 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=0.020..0.363 rows=80 loops=20033) Index Cond: (ps_suppkey = supplier.s_suppkey) Buffers: shared hit=1485846 read=181399 written=353 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.067..0.067 rows=1 loops=6433) Buffers: shared hit=156235 read=5610 written=178 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.044..0.064 rows=2 loops=6433) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=156235 read=5610 written=178 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.003 rows=1 loops=6433) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6433 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.030..0.060 rows=4 loops=6433) Buffers: shared hit=149802 read=5610 written=178 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.028..0.051 rows=4 loops=6433) Buffers: shared hit=98340 read=5608 written=178 -> Index Scan using pk_partsupp on partsupp partsupp_1 (cost=0.43..13.75 rows=4 width=8) (actual time=0.019..0.021 rows=4 loops=6433) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=21041 read=5579 written=178 -> 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=25732) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=77299 read=29 -> 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=25732) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=51462 read=2 Planning time: 4.642 ms Execution time: 13717.778 ms (68 rows) COMMIT; COMMIT