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 = 22 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=826306.62..826306.62 rows=1 width=190) (actual time=47555.477..47555.514 rows=100 loops=1) Buffers: shared hit=1819359 read=56800 written=2949 -> Sort (cost=826306.62..826306.62 rows=1 width=190) (actual time=47555.472..47555.495 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=1819359 read=56800 written=2949 -> Merge Join (cost=395548.32..826306.61 rows=1 width=190) (actual time=35516.493..47538.079 rows=4678 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1646 Buffers: shared hit=1819351 read=56800 written=2949 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8027 width=30) (actual time=2.088..5546.350 rows=7830 loops=1) Filter: (((p_type)::text ~~ '%STEEL'::text) AND (p_size = 22)) Rows Removed by Filter: 1992170 Buffers: shared hit=4118 read=42623 written=1973 -> Sort (cost=395548.32..399548.32 rows=1600000 width=168) (actual time=35513.505..36284.663 rows=1603360 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1660115 read=10164 written=793 -> Nested Loop (cost=1.56..230671.20 rows=1600000 width=168) (actual time=0.097..32514.613 rows=1603360 loops=1) Buffers: shared hit=1660115 read=10164 written=793 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.078..326.927 rows=20042 loops=1) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 79958 Buffers: shared hit=2085 read=96 written=11 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.012..0.013 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=0.056..282.161 rows=100000 loops=1) Hash Cond: (public.supplier.s_nationkey = public.nation.n_nationkey) Buffers: shared hit=2084 read=96 written=11 -> Seq Scan on supplier (cost=0.00..3179.00 rows=100000 width=142) (actual time=0.009..99.192 rows=100000 loops=1) Buffers: shared hit=2083 read=96 written=11 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.019..0.019 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..0.010 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=0.131..1.570 rows=80 loops=20042) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1658030 read=10068 written=782 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.744..0.744 rows=1 loops=6324) Buffers: shared hit=155118 read=4013 written=183 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.527..0.736 rows=2 loops=6324) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=155118 read=4013 written=183 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.048..0.049 rows=1 loops=6324) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6324 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.342..0.683 rows=4 loops=6324) Buffers: shared hit=148794 read=4013 written=183 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.231..0.431 rows=4 loops=6324) Buffers: shared hit=98202 read=4013 written=183 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.131..0.137 rows=4 loops=6324) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22178 read=4010 written=183 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.070..0.071 rows=1 loops=25296) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=76024 read=3 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.060..0.061 rows=1 loops=25296) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=50592 Total runtime: 47638.642 ms (67 rows) COMMIT; COMMIT