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 = 25 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=821690.89..821690.89 rows=1 width=190) (actual time=20110.747..20110.787 rows=100 loops=1) Buffers: shared hit=1642820 read=234354 written=55 -> Sort (cost=821690.89..821690.89 rows=1 width=190) (actual time=20110.743..20110.767 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=1642820 read=234354 written=55 -> Merge Join (cost=395522.09..821690.88 rows=1 width=190) (actual time=14969.838..20098.261 rows=4697 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1647 Buffers: shared hit=1642812 read=234354 written=55 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7914 width=30) (actual time=0.115..2568.682 rows=8073 loops=1) Filter: (((p_type)::text ~~ '%BRASS'::text) AND (p_size = 25)) Rows Removed by Filter: 1991927 Buffers: shared hit=759 read=45982 -> Sort (cost=395522.09..399521.49 rows=1599760 width=168) (actual time=14968.887..15625.231 rows=1604002 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475236kB Buffers: shared hit=1486624 read=184229 written=55 -> Nested Loop (cost=1.56..230671.43 rows=1599760 width=168) (actual time=0.085..11850.632 rows=1604080 loops=1) Buffers: shared hit=1486624 read=184229 written=55 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.066..217.535 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..0.018 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=0.052..190.572 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=0.006..66.658 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=0.006..0.014 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=0.037..0.544 rows=80 loops=20051) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1484443 read=184229 written=55 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.162..0.162 rows=1 loops=6344) Buffers: shared hit=155429 read=4143 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.110..0.158 rows=2 loops=6344) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=155429 read=4143 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.004..0.005 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=0.074..0.150 rows=4 loops=6344) Buffers: shared hit=149085 read=4143 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.064..0.118 rows=4 loops=6344) Buffers: shared hit=98333 read=4143 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.044..0.048 rows=4 loops=6344) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22072 read=4143 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.015..0.016 rows=1 loops=25376) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=76261 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.006..0.006 rows=1 loops=25376) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=50752 Total runtime: 20201.750 ms (67 rows) COMMIT; COMMIT