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 = 24 and p_type like '%BRASS' and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'AMERICA' 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 = 'AMERICA' ) order by s_acctbal desc, n_name, s_name, p_partkey LIMIT 100; QUERY PLAN ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Limit (cost=830468.55..830468.55 rows=1 width=190) (actual time=16940.196..16940.229 rows=100 loops=1) Buffers: shared hit=1859555 read=23677 written=9 -> Sort (cost=830468.55..830468.55 rows=1 width=190) (actual time=16940.191..16940.209 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=1859555 read=23677 written=9 -> Merge Join (cost=395522.09..830468.54 rows=1 width=190) (actual time=12466.574..16929.723 rows=4790 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1796 Buffers: shared hit=1859547 read=23677 written=9 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8134 width=30) (actual time=0.587..1867.908 rows=8040 loops=1) Filter: (((p_type)::text ~~ '%BRASS'::text) AND (p_size = 24)) Rows Removed by Filter: 1991960 Buffers: shared hit=41270 read=5471 written=1 -> Sort (cost=395522.09..399521.49 rows=1599760 width=168) (actual time=12464.391..12996.531 rows=1603947 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475236kB Buffers: shared hit=1656748 read=14105 written=1 -> Nested Loop (cost=1.56..230671.43 rows=1599760 width=168) (actual time=0.091..10286.019 rows=1604080 loops=1) Buffers: shared hit=1656748 read=14105 written=1 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.066..223.927 rows=20051 loops=1) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 79949 Buffers: shared hit=2181 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.009..0.020 rows=1 loops=1) Filter: (r_name = 'AMERICA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=1 -> Hash Join (cost=1.56..4555.56 rows=100000 width=168) (actual time=0.053..196.503 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=0.009..67.060 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.025..0.025 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=0.007..0.013 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=0.041..0.462 rows=80 loops=20051) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1654567 read=14105 written=1 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.177..0.177 rows=1 loops=6586) Buffers: shared hit=161529 read=4101 written=7 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.116..0.173 rows=2 loops=6586) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=161529 read=4101 written=7 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.004..0.005 rows=1 loops=6586) Filter: (r_name = 'AMERICA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6586 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.081..0.165 rows=4 loops=6586) Buffers: shared hit=154943 read=4101 written=7 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.069..0.129 rows=4 loops=6586) Buffers: shared hit=102255 read=4101 written=7 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.048..0.051 rows=4 loops=6586) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=23079 read=4101 written=7 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.018..0.018 rows=1 loops=26344) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=79176 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.007..0.008 rows=1 loops=26344) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=52688 Total runtime: 16968.072 ms (67 rows) COMMIT; COMMIT