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 = 11 and p_type like '%TIN' 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=820289.66..820289.66 rows=1 width=190) (actual time=23036.377..23036.414 rows=100 loops=1) Buffers: shared hit=1840019 read=38943 written=9 -> Sort (cost=820289.66..820289.66 rows=1 width=190) (actual time=23036.373..23036.391 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=1840019 read=38943 written=9 -> Merge Join (cost=395374.30..820289.65 rows=1 width=190) (actual time=17039.470..23021.909 rows=4717 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1699 Buffers: shared hit=1840011 read=38943 written=9 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7929 width=30) (actual time=0.167..2479.275 rows=7961 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 11)) Rows Removed by Filter: 1992039 Buffers: shared hit=41276 read=5465 written=4 -> Sort (cost=395374.30..399370.35 rows=1598418 width=168) (actual time=17038.045..17685.642 rows=1604060 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475236kB Buffers: shared hit=1641758 read=29095 written=3 -> Nested Loop (cost=1.56..230671.61 rows=1598418 width=168) (actual time=0.086..12504.638 rows=1604080 loops=1) Buffers: shared hit=1641758 read=29095 written=3 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.071..222.378 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=0.008..0.017 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=0.058..192.090 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=0.013..62.913 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=0.005..0.011 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=0.046..0.579 rows=80 loops=20051) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1639577 read=29095 written=3 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.298..0.299 rows=1 loops=6416) Buffers: shared hit=156977 read=4383 written=2 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.210..0.293 rows=2 loops=6416) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=156977 read=4383 written=2 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.012..0.014 rows=1 loops=6416) Filter: (r_name = 'AMERICA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6416 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.143..0.276 rows=4 loops=6416) Buffers: shared hit=150561 read=4383 written=2 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.129..0.239 rows=4 loops=6416) Buffers: shared hit=99233 read=4383 written=2 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.087..0.090 rows=4 loops=6416) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22101 read=4383 written=2 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.035..0.035 rows=1 loops=25664) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=77132 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.007..0.008 rows=1 loops=25664) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51328 Total runtime: 23102.497 ms (67 rows) COMMIT; COMMIT