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 = 19 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=809329.50..809329.50 rows=1 width=190) (actual time=10025.509..10025.549 rows=100 loops=1) Buffers: shared hit=1803211 read=76323 written=1626 -> Sort (cost=809329.50..809329.50 rows=1 width=190) (actual time=10025.507..10025.539 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=1803211 read=76323 written=1626 -> Merge Join (cost=381650.08..809329.49 rows=1 width=190) (actual time=6792.249..10017.524 rows=4859 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1633 Buffers: shared hit=1803203 read=76323 written=1626 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=8116 width=30) (actual time=0.152..1389.079 rows=8121 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 19)) Rows Removed by Filter: 1991879 Buffers: shared hit=4395 read=42346 written=496 -> Sort (cost=381649.66..385649.66 rows=1600000 width=168) (actual time=6791.571..7315.238 rows=1602280 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1643002 read=26424 written=1056 -> Nested Loop (cost=2.00..216772.53 rows=1600000 width=168) (actual time=0.146..4533.131 rows=1602640 loops=1) Buffers: shared hit=1643002 read=26424 written=1056 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.084..123.650 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=0.009..0.012 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=0.062..105.203 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=0.012..40.434 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.028..0.028 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..0.011 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=0.019..0.194 rows=80 loops=20033) Index Cond: (ps_suppkey = supplier.s_suppkey) Buffers: shared hit=1640821 read=26424 written=1056 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.075..0.075 rows=1 loops=6492) Buffers: shared hit=155806 read=7553 written=74 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.052..0.073 rows=2 loops=6492) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=155806 read=7553 written=74 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.003 rows=1 loops=6492) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6492 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.036..0.068 rows=4 loops=6492) Buffers: shared hit=149314 read=7553 written=74 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.034..0.058 rows=4 loops=6492) Buffers: shared hit=97378 read=7553 written=74 -> Index Scan using pk_partsupp on partsupp partsupp_1 (cost=0.43..13.75 rows=4 width=8) (actual time=0.025..0.027 rows=4 loops=6492) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=19328 read=7553 written=74 -> Index Scan using pk_supplier on supplier supplier_1 (cost=0.29..8.31 rows=1 width=8) (actual time=0.007..0.007 rows=1 loops=25968) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=78050 -> 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=25968) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=51936 Planning time: 8.645 ms Execution time: 10060.180 ms (68 rows) COMMIT; COMMIT