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 '%COPPER' 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=816449.43..816449.43 rows=1 width=190) (actual time=22536.150..22536.194 rows=100 loops=1) Buffers: shared hit=1657367 read=220383 written=42 -> Sort (cost=816449.43..816449.43 rows=1 width=190) (actual time=22536.147..22536.169 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=1657367 read=220383 written=42 -> Merge Join (cost=395374.30..816449.42 rows=1 width=190) (actual time=17021.821..22525.085 rows=4689 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1700 Buffers: shared hit=1657359 read=220383 written=42 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7832 width=30) (actual time=0.360..2741.506 rows=8044 loops=1) Filter: (((p_type)::text ~~ '%COPPER'::text) AND (p_size = 49)) Rows Removed by Filter: 1991956 Buffers: shared hit=756 read=45985 -> Sort (cost=395374.30..399370.35 rows=1598418 width=168) (actual time=17019.723..17630.712 rows=1603330 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1499757 read=170522 written=42 -> Nested Loop (cost=1.56..230671.61 rows=1598418 width=168) (actual time=0.181..14316.677 rows=1603360 loops=1) Buffers: shared hit=1499757 read=170522 written=42 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.141..225.876 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=0.018..0.020 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=0.101..195.855 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=0.027..67.513 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.034..0.034 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=0.009..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=0.041..0.670 rows=80 loops=20042) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1497576 read=170522 written=42 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.199..0.199 rows=1 loops=6389) Buffers: shared hit=156846 read=3876 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.137..0.194 rows=2 loops=6389) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=156846 read=3876 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.008..0.008 rows=1 loops=6389) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6389 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.090..0.182 rows=4 loops=6389) Buffers: shared hit=150457 read=3876 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.079..0.151 rows=4 loops=6389) Buffers: shared hit=99345 read=3876 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.054..0.057 rows=4 loops=6389) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22530 read=3876 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.021..0.022 rows=1 loops=25556) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=76815 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.006..0.007 rows=1 loops=25556) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51112 Total runtime: 22611.637 ms (67 rows) COMMIT; COMMIT