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 = 11 and p_type like '%TIN' and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'EUROPE' 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 = 'EUROPE' ) order by s_acctbal desc, n_name, s_name, p_partkey LIMIT 100; QUERY PLAN ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Limit (cost=816409.64..816409.64 rows=1 width=190) (actual time=14035.386..14035.427 rows=100 loops=1) Buffers: shared hit=1643442 read=234010 written=4197 -> Sort (cost=816409.64..816409.64 rows=1 width=190) (actual time=14035.382..14035.408 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=1643442 read=234010 written=4197 -> Merge Join (cost=395240.92..816409.63 rows=1 width=190) (actual time=10213.554..14025.795 rows=4714 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1698 Buffers: shared hit=1643434 read=234010 written=4197 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7835 width=30) (actual time=0.292..1946.332 rows=7961 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 11)) Rows Removed by Filter: 1992039 Buffers: shared hit=3912 read=42829 written=3818 -> Sort (cost=395240.86..399233.87 rows=1597205 width=168) (actual time=10212.864..10675.969 rows=1602629 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1482912 read=186514 -> Nested Loop (cost=1.56..230671.90 rows=1597205 width=168) (actual time=0.143..8376.337 rows=1602640 loops=1) Buffers: shared hit=1482912 read=186514 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.096..198.474 rows=20033 loops=1) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 79967 Buffers: shared hit=2181 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.016..0.024 rows=1 loops=1) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=1 -> Hash Join (cost=1.56..4555.56 rows=100000 width=168) (actual time=0.063..170.993 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=0.008..53.746 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.022..0.022 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=0.007..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=0.029..0.376 rows=80 loops=20033) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1480731 read=186514 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.095..0.095 rows=1 loops=6412) Buffers: shared hit=156610 read=4667 written=379 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.062..0.091 rows=2 loops=6412) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=156610 read=4667 written=379 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.004..0.004 rows=1 loops=6412) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6412 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.042..0.084 rows=4 loops=6412) Buffers: shared hit=150198 read=4667 written=379 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.038..0.068 rows=4 loops=6412) Buffers: shared hit=98902 read=4667 written=379 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.026..0.029 rows=4 loops=6412) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22107 read=4395 written=379 -> 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=25648) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=76795 read=272 -> 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=25648) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51296 Total runtime: 14058.230 ms (67 rows) COMMIT; COMMIT