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 = 9 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=827625.78..827625.79 rows=1 width=190) (actual time=17772.715..17772.744 rows=100 loops=1) Buffers: shared hit=1600554 read=272672 written=287 -> Sort (cost=827625.78..827625.79 rows=1 width=190) (actual time=17772.712..17772.728 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=1600554 read=272672 written=287 -> Merge Join (cost=395522.09..827625.77 rows=1 width=190) (actual time=13558.208..17762.540 rows=4639 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1593 Buffers: shared hit=1600546 read=272672 written=287 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8062 width=30) (actual time=0.310..2023.978 rows=7844 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 9)) Rows Removed by Filter: 1992156 Buffers: shared hit=9468 read=37273 -> Sort (cost=395522.09..399521.49 rows=1599760 width=168) (actual time=13557.269..14141.451 rows=1602847 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474939kB Buffers: shared hit=1437644 read=232038 written=287 -> Nested Loop (cost=1.56..230671.43 rows=1599760 width=168) (actual time=0.179..10999.006 rows=1602960 loops=1) Buffers: shared hit=1437644 read=232038 written=287 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.091..211.496 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=0.008..0.020 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=0.068..186.136 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=0.014..61.928 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=0.031..0.504 rows=80 loops=20037) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1435463 read=232038 written=287 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.127..0.127 rows=1 loops=6232) Buffers: shared hit=153434 read=3361 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.083..0.123 rows=2 loops=6232) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=153434 read=3361 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.004..0.005 rows=1 loops=6232) Filter: (r_name = 'ASIA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6232 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.056..0.116 rows=4 loops=6232) Buffers: shared hit=147202 read=3361 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.048..0.091 rows=4 loops=6232) Buffers: shared hit=97346 read=3361 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.033..0.035 rows=4 loops=6232) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22448 read=3361 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.012..0.012 rows=1 loops=24928) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=74898 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.005..0.005 rows=1 loops=24928) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=49856 Total runtime: 17841.445 ms (67 rows) COMMIT; COMMIT