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 '%TIN' 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=819501.77..819501.78 rows=1 width=190) (actual time=12572.790..12572.829 rows=100 loops=1) Buffers: shared hit=1666818 read=210649 -> Sort (cost=819501.77..819501.78 rows=1 width=190) (actual time=12572.787..12572.814 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=1666818 read=210649 -> Merge Join (cost=395240.92..819501.76 rows=1 width=190) (actual time=8435.778..12563.020 rows=4674 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1678 Buffers: shared hit=1666810 read=210649 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7913 width=30) (actual time=0.139..1976.165 rows=7933 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 8)) Rows Removed by Filter: 1992067 Buffers: shared hit=5250 read=41491 -> Sort (cost=395240.86..399233.87 rows=1597205 width=168) (actual time=8435.063..9057.323 rows=1603846 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475236kB Buffers: shared hit=1505817 read=165036 -> Nested Loop (cost=1.56..230671.90 rows=1597205 width=168) (actual time=0.087..6026.297 rows=1604080 loops=1) Buffers: shared hit=1505817 read=165036 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.068..146.451 rows=20051 loops=1) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 79949 Buffers: shared hit=1599 read=582 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.008..0.015 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=0.055..126.374 rows=100000 loops=1) Hash Cond: (public.supplier.s_nationkey = public.nation.n_nationkey) Buffers: shared hit=1598 read=582 -> Seq Scan on supplier (cost=0.00..3179.00 rows=100000 width=142) (actual time=0.008..47.431 rows=100000 loops=1) Buffers: shared hit=1597 read=582 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.024..0.024 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..0.013 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=0.019..0.269 rows=80 loops=20051) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1504218 read=164454 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.101..0.101 rows=1 loops=6352) Buffers: shared hit=155743 read=4122 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.065..0.097 rows=2 loops=6352) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=155743 read=4122 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.003..0.005 rows=1 loops=6352) Filter: (r_name = 'AMERICA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6352 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.043..0.090 rows=4 loops=6352) Buffers: shared hit=149391 read=4122 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.038..0.072 rows=4 loops=6352) Buffers: shared hit=98575 read=4122 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.025..0.027 rows=4 loops=6352) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22206 read=4122 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.009..0.010 rows=1 loops=25408) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=76369 -> 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=25408) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=50816 Total runtime: 12653.715 ms (67 rows) COMMIT; COMMIT