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 = 13 and p_type like '%STEEL' and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'MIDDLE EAST' 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 = 'MIDDLE EAST' ) order by s_acctbal desc, n_name, s_name, p_partkey LIMIT 100; QUERY PLAN ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Limit (cost=828302.22..828302.22 rows=1 width=190) (actual time=11602.797..11602.847 rows=100 loops=1) Buffers: shared hit=1845227 read=31342 written=7 -> Sort (cost=828302.22..828302.22 rows=1 width=190) (actual time=11602.792..11602.824 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=1845227 read=31342 written=7 -> Merge Join (cost=395548.94..828302.21 rows=1 width=190) (actual time=7963.261..11593.803 rows=4675 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1665 Buffers: shared hit=1845219 read=31342 written=7 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8106 width=30) (actual time=0.492..1608.397 rows=7945 loops=1) Filter: (((p_type)::text ~~ '%STEEL'::text) AND (p_size = 13)) Rows Removed by Filter: 1992055 Buffers: shared hit=41793 read=4948 written=4 -> Sort (cost=395548.90..399548.90 rows=1600000 width=168) (actual time=7962.249..8501.373 rows=1601897 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1648158 read=22121 -> Nested Loop (cost=1.56..230671.78 rows=1600000 width=168) (actual time=0.067..5723.241 rows=1603360 loops=1) Buffers: shared hit=1648158 read=22121 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.053..167.498 rows=20042 loops=1) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 79958 Buffers: shared hit=2148 read=33 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.007..0.008 rows=1 loops=1) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=1 -> Hash Join (cost=1.56..4555.56 rows=100000 width=168) (actual time=0.040..144.971 rows=100000 loops=1) Hash Cond: (public.supplier.s_nationkey = public.nation.n_nationkey) Buffers: shared hit=2147 read=33 -> Seq Scan on supplier (cost=0.00..3179.00 rows=100000 width=142) (actual time=0.008..54.183 rows=100000 loops=1) Buffers: shared hit=2146 read=33 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.016..0.016 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..0.005 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=0.021..0.247 rows=80 loops=20042) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1646010 read=22088 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.104..0.104 rows=1 loops=6340) Buffers: shared hit=155268 read=4273 written=3 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.067..0.100 rows=2 loops=6340) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=155268 read=4273 written=3 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.004..0.005 rows=1 loops=6340) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6340 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.044..0.094 rows=4 loops=6340) Buffers: shared hit=148928 read=4273 written=3 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.038..0.074 rows=4 loops=6340) Buffers: shared hit=98208 read=4273 written=3 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.025..0.028 rows=4 loops=6340) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=21990 read=4248 written=3 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.010..0.010 rows=1 loops=25360) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=76218 read=25 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.003..0.004 rows=1 loops=25360) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=50720 Total runtime: 11661.117 ms (67 rows) COMMIT; COMMIT