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 = 36 and p_type like '%TIN' 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=830047.77..830047.78 rows=1 width=190) (actual time=13197.634..13197.668 rows=100 loops=1) Buffers: shared hit=1820019 read=57987 written=4068 -> Sort (cost=830047.77..830047.78 rows=1 width=190) (actual time=13197.630..13197.647 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=1820019 read=57987 written=4068 -> Merge Join (cost=395548.94..830047.76 rows=1 width=190) (actual time=8964.854..13187.364 rows=4735 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1700 Buffers: shared hit=1820011 read=57987 written=4068 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8149 width=30) (actual time=0.166..2098.755 rows=8069 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 36)) Rows Removed by Filter: 1991931 Buffers: shared hit=9350 read=37391 written=3366 -> Sort (cost=395548.90..399548.90 rows=1600000 width=168) (actual time=8963.648..9488.627 rows=1602480 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1652341 read=17085 written=405 -> Nested Loop (cost=1.56..230671.78 rows=1600000 width=168) (actual time=0.128..6945.391 rows=1602640 loops=1) Buffers: shared hit=1652341 read=17085 written=405 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.076..203.316 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=0.008..0.018 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=0.057..176.947 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=0.010..62.068 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.024..0.024 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=0.003..0.012 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=0.028..0.300 rows=80 loops=20033) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1650160 read=17085 written=405 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.113..0.113 rows=1 loops=6435) Buffers: shared hit=158320 read=3511 written=297 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.073..0.109 rows=2 loops=6435) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=158320 read=3511 written=297 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.005..0.006 rows=1 loops=6435) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6435 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.047..0.100 rows=4 loops=6435) Buffers: shared hit=151885 read=3511 written=297 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.041..0.080 rows=4 loops=6435) Buffers: shared hit=100405 read=3511 written=297 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.027..0.030 rows=4 loops=6435) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=23035 read=3511 written=297 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.011..0.011 rows=1 loops=25740) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=77370 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.003..0.004 rows=1 loops=25740) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51480 Total runtime: 13225.959 ms (67 rows) COMMIT; COMMIT