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 = 43 and p_type like '%TIN' and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'ASIA' 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 = 'ASIA' ) order by s_acctbal desc, n_name, s_name, p_partkey LIMIT 100; QUERY PLAN ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Limit (cost=822416.52..822416.52 rows=1 width=190) (actual time=46456.899..46456.941 rows=100 loops=1) Buffers: shared hit=1758474 read=115778 written=3697 -> Sort (cost=822416.52..822416.52 rows=1 width=190) (actual time=46456.896..46456.924 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=1758474 read=115778 written=3697 -> Merge Join (cost=395548.32..822416.51 rows=1 width=190) (actual time=37772.388..46442.538 rows=4664 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1609 Buffers: shared hit=1758466 read=115778 written=3697 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7930 width=30) (actual time=0.067..4179.645 rows=7966 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 43)) Rows Removed by Filter: 1992034 Buffers: shared hit=11118 read=35623 written=2589 -> Sort (cost=395548.32..399548.32 rows=1600000 width=168) (actual time=37768.868..38492.003 rows=1602446 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474939kB Buffers: shared hit=1592918 read=76764 written=859 -> Nested Loop (cost=1.56..230671.20 rows=1600000 width=168) (actual time=0.200..33873.043 rows=1602960 loops=1) Buffers: shared hit=1592918 read=76764 written=859 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.093..339.767 rows=20037 loops=1) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 79963 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 = 'ASIA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=1 -> Hash Join (cost=1.56..4555.56 rows=100000 width=168) (actual time=0.067..295.396 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=0.016..100.062 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..0.014 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=0.130..1.635 rows=80 loops=20037) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1590737 read=76764 written=859 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.450..0.450 rows=1 loops=6273) Buffers: shared hit=154430 read=3391 written=249 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.315..0.444 rows=2 loops=6273) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=154430 read=3391 written=249 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.031..0.033 rows=1 loops=6273) Filter: (r_name = 'ASIA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6273 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.204..0.407 rows=4 loops=6273) Buffers: shared hit=148157 read=3391 written=249 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.151..0.285 rows=4 loops=6273) Buffers: shared hit=97973 read=3391 written=249 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.095..0.100 rows=4 loops=6273) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22564 read=3391 written=249 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.044..0.044 rows=1 loops=25092) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=75409 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.028..0.029 rows=1 loops=25092) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=50184 Total runtime: 46540.407 ms (67 rows) COMMIT; COMMIT