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 = 11 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=821042.54..821042.55 rows=1 width=190) (actual time=17473.092..17473.130 rows=100 loops=1) Buffers: shared hit=1687692 read=190197 written=2238 -> Sort (cost=821042.54..821042.55 rows=1 width=190) (actual time=17473.088..17473.108 rows=100 loops=1) Sort Key: public.supplier.s_acctbal, public.nation.n_name, public.supplier.s_name, part.p_partkey Sort Method: top-N heapsort Memory: 51kB Buffers: shared hit=1687692 read=190197 written=2238 -> Merge Join (cost=395522.09..821042.53 rows=1 width=190) (actual time=12653.482..17461.164 rows=4756 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1670 Buffers: shared hit=1687684 read=190197 written=2238 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7898 width=30) (actual time=0.529..2158.281 rows=7980 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 11)) Rows Removed by Filter: 1992020 Buffers: shared hit=23516 read=23225 written=1852 -> Sort (cost=395522.09..399521.49 rows=1599760 width=168) (actual time=12652.151..13410.688 rows=1602579 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1507139 read=162287 -> Nested Loop (cost=1.56..230671.43 rows=1599760 width=168) (actual time=0.150..9438.386 rows=1602640 loops=1) Buffers: shared hit=1507139 read=162287 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.093..179.277 rows=20033 loops=1) Join Filter: (public.nation.n_regionkey = public.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=0.014..0.029 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=0.063..154.925 rows=100000 loops=1) Hash Cond: (public.supplier.s_nationkey = public.nation.n_nationkey) Buffers: shared hit=2180 -> Seq Scan on supplier (cost=0.00..3179.00 rows=100000 width=142) (actual time=0.011..47.595 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.030..0.030 rows=25 loops=1) Buckets: 1024 Batches: 1 Memory Usage: 2kB Buffers: shared hit=1 -> Seq Scan on nation (cost=0.00..1.25 rows=25 width=34) (actual time=0.008..0.017 rows=25 loops=1) Buffers: shared hit=1 -> Index Scan using partsupp_ps_suppkey_idx on partsupp (cost=0.00..10.44 rows=80 width=12) (actual time=0.033..0.432 rows=80 loops=20033) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1504958 read=162287 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.147..0.147 rows=1 loops=6426) Buffers: shared hit=157029 read=4685 written=386 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.099..0.142 rows=2 loops=6426) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=157029 read=4685 written=386 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.005..0.006 rows=1 loops=6426) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6426 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.069..0.134 rows=4 loops=6426) Buffers: shared hit=150603 read=4685 written=386 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.060..0.107 rows=4 loops=6426) Buffers: shared hit=99195 read=4685 written=386 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.042..0.045 rows=4 loops=6426) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22202 read=4413 written=375 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.013..0.014 rows=1 loops=25704) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=76993 read=272 written=11 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.005..0.005 rows=1 loops=25704) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51408 Total runtime: 17627.088 ms (67 rows) COMMIT; COMMIT