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 = 12 and p_type like '%BRASS' 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=821319.09..821319.09 rows=1 width=190) (actual time=14285.898..14285.941 rows=100 loops=1) Buffers: shared hit=1673814 read=202060 -> Sort (cost=821319.09..821319.09 rows=1 width=190) (actual time=14285.892..14285.918 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=1673814 read=202060 -> Merge Join (cost=395548.02..821319.08 rows=1 width=190) (actual time=10266.016..14274.750 rows=4684 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1655 Buffers: shared hit=1673806 read=202060 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7947 width=30) (actual time=0.674..1886.082 rows=7897 loops=1) Filter: (((p_type)::text ~~ '%BRASS'::text) AND (p_size = 12)) Rows Removed by Filter: 1992103 Buffers: shared hit=2682 read=44059 -> Sort (cost=395548.01..399548.01 rows=1600000 width=168) (actual time=10264.741..10903.953 rows=1602586 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474939kB Buffers: shared hit=1515459 read=154223 -> Nested Loop (cost=1.56..230670.89 rows=1600000 width=168) (actual time=0.144..6939.142 rows=1602960 loops=1) Buffers: shared hit=1515459 read=154223 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.091..176.830 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..154.329 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=0.015..53.598 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.027..0.027 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=0.022..0.308 rows=80 loops=20037) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1513278 read=154223 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.097..0.097 rows=1 loops=6339) Buffers: shared hit=155665 read=3778 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.062..0.093 rows=2 loops=6339) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=155665 read=3778 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.003..0.004 rows=1 loops=6339) Filter: (r_name = 'ASIA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6339 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.040..0.086 rows=4 loops=6339) Buffers: shared hit=149326 read=3778 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.035..0.068 rows=4 loops=6339) Buffers: shared hit=98614 read=3778 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.023..0.025 rows=4 loops=6339) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22425 read=3778 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.009..0.009 rows=1 loops=25356) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=76189 -> 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=25356) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=50712 Total runtime: 14373.243 ms (67 rows) COMMIT; COMMIT