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 = 10 and p_type like '%TIN' 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=832363.72..832363.73 rows=1 width=190) (actual time=18530.822..18530.860 rows=100 loops=1) Buffers: shared hit=1738288 read=136601 written=47 -> Sort (cost=832363.72..832363.73 rows=1 width=190) (actual time=18530.819..18530.843 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=1738288 read=136601 written=47 -> Merge Join (cost=395522.09..832363.71 rows=1 width=190) (actual time=12542.116..18517.947 rows=4618 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1688 Buffers: shared hit=1738280 read=136601 written=47 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8181 width=30) (actual time=0.043..2985.583 rows=7869 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 10)) Rows Removed by Filter: 1992131 Buffers: shared hit=987 read=45754 written=11 -> Sort (cost=395522.09..399521.49 rows=1599760 width=168) (actual time=12541.692..13252.062 rows=1602632 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1582911 read=86515 written=34 -> Nested Loop (cost=1.56..230671.43 rows=1599760 width=168) (actual time=0.159..10128.185 rows=1602640 loops=1) Buffers: shared hit=1582911 read=86515 written=34 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.086..219.115 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=0.009..0.020 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=0.065..192.875 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..63.138 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.028..0.028 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..0.012 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..0.460 rows=80 loops=20033) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1580730 read=86515 written=34 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.215..0.215 rows=1 loops=6306) Buffers: shared hit=154382 read=4332 written=2 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.144..0.210 rows=2 loops=6306) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=154382 read=4332 written=2 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.006..0.007 rows=1 loops=6306) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6306 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.101..0.200 rows=4 loops=6306) Buffers: shared hit=148076 read=4332 written=2 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.084..0.156 rows=4 loops=6306) Buffers: shared hit=97628 read=4332 written=2 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.056..0.060 rows=4 loops=6306) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=21799 read=4332 written=2 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.022..0.022 rows=1 loops=25224) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=75829 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.009..0.009 rows=1 loops=25224) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=50448 Total runtime: 18618.155 ms (67 rows) COMMIT; COMMIT