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 = 49 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=825559.20..825559.20 rows=1 width=190) (actual time=17162.797..17162.841 rows=100 loops=1) Buffers: shared hit=1639561 read=239770 written=10185 -> Sort (cost=825559.20..825559.20 rows=1 width=190) (actual time=17162.794..17162.819 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=1639561 read=239770 written=10185 -> Merge Join (cost=395548.94..825559.19 rows=1 width=190) (actual time=11892.064..17151.042 rows=4745 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1688 Buffers: shared hit=1639553 read=239770 written=10185 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8037 width=30) (actual time=0.341..2492.676 rows=7994 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 49)) Rows Removed by Filter: 1992006 Buffers: shared hit=757 read=45984 written=8441 -> Sort (cost=395548.90..399548.90 rows=1600000 width=168) (actual time=11891.197..12622.709 rows=1603979 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475236kB Buffers: shared hit=1482162 read=188691 written=848 -> Nested Loop (cost=1.56..230671.78 rows=1600000 width=168) (actual time=0.101..8908.814 rows=1604080 loops=1) Buffers: shared hit=1482162 read=188691 written=848 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.083..202.658 rows=20051 loops=1) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 79949 Buffers: shared hit=204 read=1977 written=96 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.009..0.020 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=0.069..176.474 rows=100000 loops=1) Hash Cond: (public.supplier.s_nationkey = public.nation.n_nationkey) Buffers: shared hit=203 read=1977 written=96 -> Seq Scan on supplier (cost=0.00..3179.00 rows=100000 width=142) (actual time=0.012..69.993 rows=100000 loops=1) Buffers: shared hit=202 read=1977 written=96 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.030..0.030 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..0.014 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=0.027..0.403 rows=80 loops=20051) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1481958 read=186714 written=752 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.169..0.169 rows=1 loops=6433) Buffers: shared hit=156634 read=5095 written=896 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.119..0.164 rows=2 loops=6433) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=156634 read=5095 written=896 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.006..0.007 rows=1 loops=6433) Filter: (r_name = 'AMERICA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6433 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.087..0.154 rows=4 loops=6433) Buffers: shared hit=150201 read=5095 written=896 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.079..0.127 rows=4 loops=6433) Buffers: shared hit=98737 read=5095 written=896 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.057..0.060 rows=4 loops=6433) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22114 read=4382 written=803 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.015..0.015 rows=1 loops=25732) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=76623 read=713 written=93 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.005..0.005 rows=1 loops=25732) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51464 Total runtime: 17275.600 ms (67 rows) COMMIT; COMMIT