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 = 35 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=825359.66..825359.66 rows=1 width=190) (actual time=18572.759..18572.806 rows=100 loops=1) Buffers: shared hit=1645131 read=237530 written=177 -> Sort (cost=825359.66..825359.66 rows=1 width=190) (actual time=18572.755..18572.783 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=1645131 read=237530 written=177 -> Merge Join (cost=395548.99..825359.65 rows=1 width=190) (actual time=13873.281..18561.827 rows=4803 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1757 Buffers: shared hit=1645123 read=237530 written=177 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8006 width=30) (actual time=0.399..2219.652 rows=8068 loops=1) Filter: (((p_type)::text ~~ '%BRASS'::text) AND (p_size = 35)) Rows Removed by Filter: 1991932 Buffers: shared hit=758 read=45983 -> Sort (cost=395548.99..399548.99 rows=1600000 width=168) (actual time=13871.722..14602.280 rows=1603949 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475236kB Buffers: shared hit=1483370 read=187483 written=177 -> Nested Loop (cost=1.56..230671.86 rows=1600000 width=168) (actual time=0.087..10299.124 rows=1604080 loops=1) Buffers: shared hit=1483370 read=187483 written=177 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.072..216.852 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=0.017..0.031 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=0.049..190.049 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..59.349 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.019..0.019 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..0.009 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=0.032..0.470 rows=80 loops=20051) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1481189 read=187483 written=177 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.127..0.127 rows=1 loops=6560) Buffers: shared hit=160995 read=4064 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.083..0.123 rows=2 loops=6560) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=160995 read=4064 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.006..0.007 rows=1 loops=6560) Filter: (r_name = 'AMERICA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6560 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.054..0.113 rows=4 loops=6560) Buffers: shared hit=154435 read=4064 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.046..0.088 rows=4 loops=6560) Buffers: shared hit=101955 read=4064 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.031..0.033 rows=4 loops=6560) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=23080 read=4064 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.012..0.012 rows=1 loops=26240) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=78875 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.004..0.005 rows=1 loops=26240) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=52480 Total runtime: 18638.226 ms (67 rows) COMMIT; COMMIT