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 = 2 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=822932.93..822932.94 rows=1 width=190) (actual time=19775.688..19775.732 rows=100 loops=1) Buffers: shared hit=1799775 read=77902 written=3182 -> Sort (cost=822932.93..822932.94 rows=1 width=190) (actual time=19775.684..19775.704 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=1799775 read=77902 written=3182 -> Merge Join (cost=395374.30..822932.92 rows=1 width=190) (actual time=13946.662..19761.175 rows=4707 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1654 Buffers: shared hit=1799767 read=77902 written=3182 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=7996 width=30) (actual time=3.858..2905.484 rows=7914 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 2)) Rows Removed by Filter: 1992086 Buffers: shared hit=8757 read=37984 written=138 -> Sort (cost=395374.30..399370.35 rows=1598418 width=168) (actual time=13942.522..14597.107 rows=1603935 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 475236kB Buffers: shared hit=1634586 read=36267 written=3035 -> Nested Loop (cost=1.56..230671.61 rows=1598418 width=168) (actual time=1.142..11792.175 rows=1604080 loops=1) Buffers: shared hit=1634586 read=36267 written=3035 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=1.113..222.323 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..0.020 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=1.100..192.969 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=1.027..64.989 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.035..0.035 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=0.006..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=0.046..0.545 rows=80 loops=20051) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1632405 read=36267 written=3035 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.210..0.211 rows=1 loops=6361) Buffers: shared hit=156424 read=3651 written=9 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.135..0.205 rows=2 loops=6361) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=156424 read=3651 written=9 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.007..0.009 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=0.095..0.193 rows=4 loops=6361) Buffers: shared hit=150063 read=3651 written=9 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.085..0.163 rows=4 loops=6361) Buffers: shared hit=99175 read=3651 written=9 -> 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=6361) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22684 read=3651 written=9 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.023..0.024 rows=1 loops=25444) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=76491 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.005..0.006 rows=1 loops=25444) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=50888 Total runtime: 19836.805 ms (67 rows) COMMIT; COMMIT