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 '%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=816431.52..816431.53 rows=1 width=190) (actual time=11884.418..11884.447 rows=100 loops=1) Buffers: shared hit=1665337 read=211789 written=438 -> Sort (cost=816431.52..816431.53 rows=1 width=190) (actual time=11884.414..11884.431 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=1665337 read=211789 written=438 -> Merge Join (cost=395548.02..816431.51 rows=1 width=190) (actual time=8369.562..11876.775 rows=4662 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1682 Buffers: shared hit=1665329 read=211789 written=438 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7823 width=30) (actual time=0.039..1546.994 rows=7922 loops=1) Filter: (((p_type)::text ~~ '%BRASS'::text) AND (p_size = 11)) Rows Removed by Filter: 1992078 Buffers: shared hit=758 read=45983 written=400 -> Sort (cost=395548.01..399548.01 rows=1600000 width=168) (actual time=8369.124..9032.385 rows=1604073 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475236kB Buffers: shared hit=1509358 read=161495 -> Nested Loop (cost=1.56..230670.89 rows=1600000 width=168) (actual time=0.078..6060.274 rows=1604080 loops=1) Buffers: shared hit=1509358 read=161495 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.063..154.668 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=0.007..0.018 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=0.051..134.433 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..50.668 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.022..0.022 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=0.005..0.009 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=0.020..0.270 rows=80 loops=20051) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1507177 read=161495 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.077..0.077 rows=1 loops=6344) Buffers: shared hit=155213 read=4311 written=38 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.049..0.074 rows=2 loops=6344) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=155213 read=4311 written=38 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.003 rows=1 loops=6344) Filter: (r_name = 'AMERICA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6344 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.033..0.069 rows=4 loops=6344) Buffers: shared hit=148869 read=4311 written=38 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.029..0.056 rows=4 loops=6344) Buffers: shared hit=98117 read=4311 written=38 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.019..0.021 rows=4 loops=6344) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=21853 read=4311 written=38 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.007..0.008 rows=1 loops=25376) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=76264 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.002..0.002 rows=1 loops=25376) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=50752 Total runtime: 11943.101 ms (67 rows) COMMIT; COMMIT