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 = 23 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=825908.17..825908.17 rows=1 width=190) (actual time=10570.123..10570.161 rows=100 loops=1) Buffers: shared hit=1776483 read=96117 -> Sort (cost=825908.17..825908.17 rows=1 width=190) (actual time=10570.119..10570.140 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=1776483 read=96117 -> Merge Join (cost=395548.83..825908.16 rows=1 width=190) (actual time=7424.306..10562.595 rows=4638 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1582 Buffers: shared hit=1776475 read=96117 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8017 width=30) (actual time=0.196..1412.171 rows=7932 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 23)) Rows Removed by Filter: 1992068 Buffers: shared hit=10062 read=36679 -> Sort (cost=395548.83..399548.83 rows=1600000 width=168) (actual time=7423.373..7961.951 rows=1602625 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1612946 read=56480 -> Nested Loop (cost=1.56..230671.71 rows=1600000 width=168) (actual time=0.135..4646.702 rows=1602640 loops=1) Buffers: shared hit=1612946 read=56480 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.084..131.701 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..0.016 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=0.061..113.132 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..41.364 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.026..0.026 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..0.012 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=0.017..0.203 rows=80 loops=20033) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1610765 read=56480 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.071..0.071 rows=1 loops=6220) Buffers: shared hit=153467 read=2958 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.045..0.068 rows=2 loops=6220) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=153467 read=2958 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.003 rows=1 loops=6220) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6220 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.029..0.063 rows=4 loops=6220) Buffers: shared hit=147247 read=2958 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.025..0.051 rows=4 loops=6220) Buffers: shared hit=97487 read=2958 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.016..0.018 rows=4 loops=6220) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22700 read=2958 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.007..0.007 rows=1 loops=24880) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=74787 -> 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=24880) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=49760 Total runtime: 10649.581 ms (67 rows) COMMIT; COMMIT