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 = 36 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=822017.31..822017.31 rows=1 width=190) (actual time=13115.349..13115.391 rows=100 loops=1) Buffers: shared hit=1721282 read=159563 written=1655 -> Sort (cost=822017.31..822017.31 rows=1 width=190) (actual time=13115.343..13115.369 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=1721282 read=159563 written=1655 -> Merge Join (cost=395548.02..822017.30 rows=1 width=190) (actual time=9650.946..13106.850 rows=4801 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1692 Buffers: shared hit=1721274 read=159563 written=1655 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7964 width=30) (actual time=0.086..1452.064 rows=8069 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 36)) Rows Removed by Filter: 1991931 Buffers: shared hit=41277 read=5464 -> Sort (cost=395548.01..399548.01 rows=1600000 width=168) (actual time=9649.836..10277.658 rows=1603934 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475236kB Buffers: shared hit=1520433 read=150420 written=1655 -> Nested Loop (cost=1.56..230670.89 rows=1600000 width=168) (actual time=0.062..7216.023 rows=1604080 loops=1) Buffers: shared hit=1520433 read=150420 written=1655 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.048..182.081 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=0.005..0.013 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=0.039..157.899 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=0.007..53.961 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.017..0.017 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..0.006 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=0.024..0.320 rows=80 loops=20051) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1518252 read=150420 written=1655 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.085..0.085 rows=1 loops=6493) Buffers: shared hit=159564 read=3679 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.054..0.082 rows=2 loops=6493) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=159564 read=3679 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.004 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=0.035..0.076 rows=4 loops=6493) Buffers: shared hit=153071 read=3679 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.031..0.061 rows=4 loops=6493) Buffers: shared hit=101127 read=3679 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.020..0.022 rows=4 loops=6493) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=23055 read=3679 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.008..0.008 rows=1 loops=25972) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=78072 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.002..0.003 rows=1 loops=25972) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51944 Total runtime: 13188.958 ms (67 rows) COMMIT; COMMIT