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 = 34 and p_type like '%COPPER' 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=829498.50..829498.50 rows=1 width=190) (actual time=42707.044..42707.079 rows=100 loops=1) Buffers: shared hit=1534256 read=343342 written=45 -> Sort (cost=829498.50..829498.50 rows=1 width=190) (actual time=42707.040..42707.065 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=1534256 read=343342 written=45 -> Merge Join (cost=395548.32..829498.49 rows=1 width=190) (actual time=38794.848..42697.288 rows=4709 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1652 Buffers: shared hit=1534248 read=343342 written=45 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8108 width=30) (actual time=3.466..1590.046 rows=7947 loops=1) Filter: (((p_type)::text ~~ '%COPPER'::text) AND (p_size = 34)) Rows Removed by Filter: 1992053 Buffers: shared hit=41262 read=5479 -> Sort (cost=395548.32..399548.32 rows=1600000 width=168) (actual time=38790.708..39398.718 rows=1603952 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475236kB Buffers: shared hit=1337166 read=333687 written=45 -> Nested Loop (cost=1.56..230671.20 rows=1600000 width=168) (actual time=3.647..36236.128 rows=1604080 loops=1) Buffers: shared hit=1337166 read=333687 written=45 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=2.164..324.419 rows=20051 loops=1) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 79949 Buffers: shared hit=2181 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.202..0.214 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=1.945..278.697 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=0.546..87.461 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=1.361..1.361 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=1.332..1.337 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=0.094..1.751 rows=80 loops=20051) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1334985 read=333687 written=45 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.126..0.126 rows=1 loops=6361) Buffers: shared hit=155820 read=4176 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.086..0.122 rows=2 loops=6361) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=155820 read=4176 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.005..0.006 rows=1 loops=6361) Filter: (r_name = 'AMERICA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6361 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.059..0.114 rows=4 loops=6361) Buffers: shared hit=149459 read=4176 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.045..0.083 rows=4 loops=6361) Buffers: shared hit=98571 read=4176 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.031..0.034 rows=4 loops=6361) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22114 read=4176 -> 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=25444) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=76457 -> 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=25444) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=50888 Total runtime: 42753.117 ms (67 rows) COMMIT; COMMIT