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 = '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=812292.96..812292.96 rows=1 width=190) (actual time=13919.689..13919.734 rows=100 loops=1) Buffers: shared hit=1809915 read=67814 written=273 -> Sort (cost=812292.96..812292.96 rows=1 width=190) (actual time=13919.685..13919.714 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=1809915 read=67814 written=273 -> Merge Join (cost=395548.94..812292.95 rows=1 width=190) (actual time=9750.545..13910.299 rows=4715 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1707 Buffers: shared hit=1809907 read=67814 written=273 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7703 width=30) (actual time=0.055..1923.283 rows=7922 loops=1) Filter: (((p_type)::text ~~ '%BRASS'::text) AND (p_size = 11)) Rows Removed by Filter: 1992078 Buffers: shared hit=757 read=45984 written=44 -> Sort (cost=395548.90..399548.90 rows=1600000 width=168) (actual time=9749.504..10440.304 rows=1602638 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1651827 read=17599 written=225 -> Nested Loop (cost=1.56..230671.78 rows=1600000 width=168) (actual time=0.168..6948.184 rows=1602640 loops=1) Buffers: shared hit=1651827 read=17599 written=225 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.088..189.360 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=0.011..0.021 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=0.066..164.239 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..56.767 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.033..0.033 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..0.011 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=0.026..0.305 rows=80 loops=20033) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1649646 read=17599 written=225 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.104..0.104 rows=1 loops=6422) Buffers: shared hit=157323 read=4231 written=4 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.069..0.100 rows=2 loops=6422) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=157323 read=4231 written=4 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.004..0.005 rows=1 loops=6422) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6422 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.047..0.093 rows=4 loops=6422) Buffers: shared hit=150901 read=4231 written=4 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.041..0.075 rows=4 loops=6422) Buffers: shared hit=99525 read=4231 written=4 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.027..0.029 rows=4 loops=6422) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22334 read=4231 written=4 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.010..0.010 rows=1 loops=25688) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=77191 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.003..0.003 rows=1 loops=25688) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51376 Total runtime: 14006.001 ms (67 rows) COMMIT; COMMIT