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 = 17 and p_type like '%BRASS' and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'AMERICA' 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 = 'AMERICA' ) order by s_acctbal desc, n_name, s_name, p_partkey LIMIT 100; QUERY PLAN ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Limit (cost=823164.62..823164.62 rows=1 width=190) (actual time=64643.512..64643.554 rows=100 loops=1) Buffers: shared hit=1555584 read=321975 written=80 -> Sort (cost=823164.62..823164.62 rows=1 width=190) (actual time=64643.508..64643.537 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=1555584 read=321975 written=80 -> Merge Join (cost=395548.32..823164.61 rows=1 width=190) (actual time=54852.287..64625.164 rows=4701 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1657 Buffers: shared hit=1555576 read=321975 written=80 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7949 width=30) (actual time=0.183..4699.519 rows=8026 loops=1) Filter: (((p_type)::text ~~ '%BRASS'::text) AND (p_size = 17)) Rows Removed by Filter: 1991974 Buffers: shared hit=756 read=45985 -> Sort (cost=395548.32..399548.32 rows=1600000 width=168) (actual time=54851.798..55509.726 rows=1603851 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475236kB Buffers: shared hit=1399747 read=271106 written=80 -> Nested Loop (cost=1.56..230671.20 rows=1600000 width=168) (actual time=0.133..52129.695 rows=1604080 loops=1) Buffers: shared hit=1399747 read=271106 written=80 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.108..388.532 rows=20051 loops=1) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 79949 Buffers: shared hit=2181 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.010..0.023 rows=1 loops=1) Filter: (r_name = 'AMERICA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=1 -> Hash Join (cost=1.56..4555.56 rows=100000 width=168) (actual time=0.092..334.778 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=0.012..116.099 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.054..0.054 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=0.034..0.042 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=0.158..2.540 rows=80 loops=20051) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1397566 read=271106 written=80 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.543..0.544 rows=1 loops=6358) Buffers: shared hit=155073 read=4884 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.392..0.536 rows=2 loops=6358) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=155073 read=4884 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.035..0.037 rows=1 loops=6358) Filter: (r_name = 'AMERICA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6358 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.266..0.496 rows=4 loops=6358) Buffers: shared hit=148715 read=4884 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.196..0.344 rows=4 loops=6358) Buffers: shared hit=97851 read=4884 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.123..0.127 rows=4 loops=6358) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=21425 read=4884 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.051..0.052 rows=1 loops=25432) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=76426 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.035..0.036 rows=1 loops=25432) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=50864 Total runtime: 64704.886 ms (67 rows) COMMIT; COMMIT