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 = 38 and p_type like '%TIN' and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'ASIA' 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 = 'ASIA' ) order by s_acctbal desc, n_name, s_name, p_partkey LIMIT 100; QUERY PLAN ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Limit (cost=826106.90..826106.91 rows=1 width=190) (actual time=12604.118..12604.149 rows=100 loops=1) Buffers: shared hit=1662709 read=216369 written=865 -> Sort (cost=826106.90..826106.91 rows=1 width=190) (actual time=12604.114..12604.130 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=1662709 read=216369 written=865 -> Merge Join (cost=395548.02..826106.89 rows=1 width=190) (actual time=8993.675..12595.119 rows=4809 loops=1) Merge Cond: (part.p_partkey = public.partsupp.ps_partkey) Join Filter: (public.partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1657 Buffers: shared hit=1662701 read=216369 written=865 -> Index Scan using pk_part on part (cost=0.00..102473.47 rows=8068 width=30) (actual time=0.598..1658.753 rows=8148 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 38)) Rows Removed by Filter: 1991852 Buffers: shared hit=758 read=45983 -> Sort (cost=395548.01..399548.01 rows=1600000 width=168) (actual time=8992.484..9596.289 rows=1602418 loops=1) Sort Key: public.partsupp.ps_partkey Sort Method: quicksort Memory: 474939kB Buffers: shared hit=1503296 read=166386 written=865 -> Nested Loop (cost=1.56..230670.89 rows=1600000 width=168) (actual time=0.143..6923.572 rows=1602960 loops=1) Buffers: shared hit=1503296 read=166386 written=865 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.088..167.540 rows=20037 loops=1) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 79963 Buffers: shared hit=2181 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.009..0.017 rows=1 loops=1) Filter: (r_name = 'ASIA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=1 -> Hash Join (cost=1.56..4555.56 rows=100000 width=168) (actual time=0.060..145.130 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=0.014..49.735 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=0.006..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=0.022..0.308 rows=80 loops=20037) Index Cond: (ps_suppkey = public.supplier.s_suppkey) Buffers: shared hit=1501115 read=166386 written=865 SubPlan 1 -> Aggregate (cost=49.85..49.86 rows=1 width=4) (actual time=0.082..0.082 rows=1 loops=6466) Buffers: shared hit=158647 read=4000 -> Nested Loop (cost=0.00..49.84 rows=1 width=4) (actual time=0.052..0.079 rows=2 loops=6466) Join Filter: (public.nation.n_regionkey = public.region.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=158647 read=4000 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.003..0.004 rows=1 loops=6466) Filter: (r_name = 'ASIA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6466 -> Nested Loop (cost=0.00..48.73 rows=4 width=8) (actual time=0.034..0.073 rows=4 loops=6466) Buffers: shared hit=152181 read=4000 -> Nested Loop (cost=0.00..47.61 rows=4 width=8) (actual time=0.030..0.058 rows=4 loops=6466) Buffers: shared hit=100453 read=4000 -> Index Scan using pk_partsupp on partsupp (cost=0.00..14.45 rows=4 width=8) (actual time=0.020..0.022 rows=4 loops=6466) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22710 read=4000 -> Index Scan using pk_supplier on supplier (cost=0.00..8.28 rows=1 width=8) (actual time=0.008..0.008 rows=1 loops=25864) Index Cond: (s_suppkey = public.partsupp.ps_suppkey) Buffers: shared hit=77743 -> Index Scan using pk_nation on nation (cost=0.00..0.27 rows=1 width=8) (actual time=0.002..0.003 rows=1 loops=25864) Index Cond: (n_nationkey = public.supplier.s_nationkey) Buffers: shared hit=51728 Total runtime: 12664.973 ms (67 rows) COMMIT; COMMIT