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 = 8 and p_type like '%NICKEL' 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=821219.57..821219.57 rows=1 width=190) (actual time=45467.395..45467.442 rows=100 loops=1) Buffers: shared hit=1793486 read=87449 written=1691 -> Sort (cost=821219.57..821219.57 rows=1 width=190) (actual time=45467.389..45467.419 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=1793486 read=87449 written=1691 -> Merge Join (cost=395548.32..821219.56 rows=1 width=190) (actual time=35484.917..45450.262 rows=4786 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1707 Buffers: shared hit=1793478 read=87449 written=1691 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7900 width=30) (actual time=0.410..4630.338 rows=8076 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 8)) Rows Removed by Filter: 1991924 Buffers: shared hit=800 read=45941 written=7 -> Sort (cost=395548.32..399548.32 rows=1600000 width=168) (actual time=35483.684..36107.515 rows=1604031 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475236kB Buffers: shared hit=1633614 read=37239 written=1683 -> Nested Loop (cost=1.56..230671.20 rows=1600000 width=168) (actual time=0.394..32266.024 rows=1604080 loops=1) Buffers: shared hit=1633614 read=37239 written=1683 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.092..327.138 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=0.013..0.025 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=0.074..283.175 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=0.016..95.962 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.028..0.028 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=0.126..1.555 rows=80 loops=20051) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1631433 read=37239 written=1683 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.583..0.584 rows=1 loops=6493) Buffers: shared hit=159064 read=4269 written=1 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.401..0.577 rows=2 loops=6493) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=159064 read=4269 written=1 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.039..0.041 rows=1 loops=6493) Filter: (r_name = 'AMERICA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6493 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.257..0.532 rows=4 loops=6493) Buffers: shared hit=152571 read=4269 written=1 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.185..0.352 rows=4 loops=6493) Buffers: shared hit=100627 read=4269 written=1 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.113..0.118 rows=4 loops=6493) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22592 read=4269 written=1 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.056..0.056 rows=1 loops=25972) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=78035 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.043..0.043 rows=1 loops=25972) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51944 Total runtime: 45524.370 ms (67 rows) COMMIT; COMMIT