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 = 14 and p_type like '%STEEL' and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'MIDDLE EAST' 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 = 'MIDDLE EAST' ) order by s_acctbal desc, n_name, s_name, p_partkey LIMIT 100; QUERY PLAN ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Limit (cost=831893.08..831893.08 rows=1 width=190) (actual time=17339.996..17340.041 rows=100 loops=1) Buffers: shared hit=1656599 read=223336 written=8842 -> Sort (cost=831893.08..831893.08 rows=1 width=190) (actual time=17339.992..17340.022 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=1656599 read=223336 written=8842 -> Merge Join (cost=395548.94..831893.07 rows=1 width=190) (actual time=12388.982..17327.202 rows=4779 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1696 Buffers: shared hit=1656591 read=223336 written=8842 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8196 width=30) (actual time=0.437..2396.904 rows=8024 loops=1) Filter: (((p_type)::text ~~ '%STEEL'::text) AND (p_size = 14)) Rows Removed by Filter: 1991976 Buffers: shared hit=765 read=45976 written=1567 -> Sort (cost=395548.90..399548.90 rows=1600000 width=168) (actual time=12388.169..13062.445 rows=1603246 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1497210 read=173069 written=7128 -> Nested Loop (cost=1.56..230671.78 rows=1600000 width=168) (actual time=0.102..10165.340 rows=1603360 loops=1) Buffers: shared hit=1497210 read=173069 written=7128 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.087..215.983 rows=20042 loops=1) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 79958 Buffers: shared hit=2181 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.008..0.009 rows=1 loops=1) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=1 -> Hash Join (cost=1.56..4555.56 rows=100000 width=168) (actual time=0.068..187.871 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=0.020..63.695 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.027..0.027 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..0.008 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=0.032..0.460 rows=80 loops=20042) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1495029 read=173069 written=7128 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.145..0.145 rows=1 loops=6475) Buffers: shared hit=158616 read=4291 written=147 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.097..0.140 rows=2 loops=6475) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=158616 read=4291 written=147 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.007..0.007 rows=1 loops=6475) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6475 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.065..0.130 rows=4 loops=6475) Buffers: shared hit=152141 read=4291 written=147 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.057..0.104 rows=4 loops=6475) Buffers: shared hit=100341 read=4291 written=147 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.036..0.039 rows=4 loops=6475) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22496 read=4291 written=147 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.014..0.014 rows=1 loops=25900) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=77845 -> 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=25900) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51800 Total runtime: 17403.460 ms (67 rows) COMMIT; COMMIT