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 = 13 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=824412.07..824412.08 rows=1 width=190) (actual time=12752.991..12753.030 rows=100 loops=1) Buffers: shared hit=1838393 read=40489 -> Sort (cost=824412.07..824412.08 rows=1 width=190) (actual time=12752.987..12753.009 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=1838393 read=40489 -> Merge Join (cost=395548.99..824412.06 rows=1 width=190) (actual time=8694.276..12742.876 rows=4750 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1719 Buffers: shared hit=1838385 read=40489 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7982 width=30) (actual time=0.334..1722.237 rows=7972 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 13)) Rows Removed by Filter: 1992028 Buffers: shared hit=41278 read=5463 -> Sort (cost=395548.99..399548.99 rows=1600000 width=168) (actual time=8693.396..9358.889 rows=1602636 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1638770 read=30656 -> Nested Loop (cost=1.56..230671.86 rows=1600000 width=168) (actual time=0.141..6435.401 rows=1602640 loops=1) Buffers: shared hit=1638770 read=30656 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.094..175.821 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=0.009..0.018 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=0.071..152.581 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=0.014..54.588 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.026..0.026 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=0.008..0.018 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..0.284 rows=80 loops=20033) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1636589 read=30656 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.121..0.121 rows=1 loops=6469) Buffers: shared hit=158337 read=4370 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.078..0.116 rows=2 loops=6469) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=158337 read=4370 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.006..0.007 rows=1 loops=6469) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6469 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.052..0.107 rows=4 loops=6469) Buffers: shared hit=151868 read=4370 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.047..0.085 rows=4 loops=6469) Buffers: shared hit=100116 read=4370 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.032..0.034 rows=4 loops=6469) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22347 read=4370 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.011..0.011 rows=1 loops=25876) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=77769 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.004..0.004 rows=1 loops=25876) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51752 Total runtime: 12830.796 ms (67 rows) COMMIT; COMMIT