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 = 28 and p_type like '%TIN' and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'EUROPE' 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 = 'EUROPE' ) order by s_acctbal desc, n_name, s_name, p_partkey LIMIT 100; QUERY PLAN --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Limit (cost=808108.11..808108.11 rows=1 width=190) (actual time=9627.791..9627.814 rows=100 loops=1) Buffers: shared hit=1679099 read=198863 -> Sort (cost=808108.11..808108.11 rows=1 width=190) (actual time=9627.789..9627.797 rows=100 loops=1) Sort Key: supplier.s_acctbal, nation.n_name, supplier.s_name, part.p_partkey Sort Method: top-N heapsort Memory: 52kB Buffers: shared hit=1679099 read=198863 -> Merge Join (cost=381649.99..808108.10 rows=1 width=190) (actual time=7603.988..9622.864 rows=4772 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1659 Buffers: shared hit=1679091 read=198863 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=8085 width=30) (actual time=0.324..976.637 rows=8149 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 28)) Rows Removed by Filter: 1991851 Buffers: shared hit=41278 read=5463 -> Sort (cost=381649.56..385649.56 rows=1600000 width=168) (actual time=7603.207..7883.958 rows=1602424 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1480735 read=188691 -> Nested Loop (cost=2.00..216772.44 rows=1600000 width=168) (actual time=0.151..4018.375 rows=1602640 loops=1) Buffers: shared hit=1480735 read=188691 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.090..104.044 rows=20033 loops=1) Join Filter: (nation.n_regionkey = region.r_regionkey) Rows Removed by Join Filter: 79967 Buffers: shared hit=4 read=2177 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.010..0.012 rows=1 loops=1) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=1 -> Hash Join (cost=1.56..4555.56 rows=100000 width=168) (actual time=0.064..89.607 rows=100000 loops=1) Hash Cond: (supplier.s_nationkey = nation.n_nationkey) Buffers: shared hit=3 read=2177 -> Seq Scan on supplier (cost=0.00..3179.00 rows=100000 width=142) (actual time=0.004..41.833 rows=100000 loops=1) Buffers: shared hit=2 read=2177 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.031..0.031 rows=25 loops=1) Buckets: 1024 Batches: 1 Memory Usage: 10kB Buffers: shared hit=1 -> Seq Scan on nation (cost=0.00..1.25 rows=25 width=34) (actual time=0.004..0.010 rows=25 loops=1) Buffers: shared hit=1 -> Index Scan using partsupp_ps_suppkey_idx on partsupp (cost=0.43..9.75 rows=80 width=12) (actual time=0.014..0.177 rows=80 loops=20033) Index Cond: (ps_suppkey = supplier.s_suppkey) Buffers: shared hit=1480731 read=186514 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.043..0.043 rows=1 loops=6431) Buffers: shared hit=157078 read=4709 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.028..0.041 rows=2 loops=6431) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=157078 read=4709 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.002 rows=1 loops=6431) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6431 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.019..0.038 rows=4 loops=6431) Buffers: shared hit=150647 read=4709 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.017..0.029 rows=4 loops=6431) Buffers: shared hit=99199 read=4709 -> Index Scan using pk_partsupp on partsupp partsupp_1 (cost=0.43..13.75 rows=4 width=8) (actual time=0.013..0.014 rows=4 loops=6431) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22152 read=4437 -> Index Scan using pk_supplier on supplier supplier_1 (cost=0.29..8.31 rows=1 width=8) (actual time=0.003..0.003 rows=1 loops=25724) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=77047 read=272 -> Index Scan using pk_nation on nation nation_1 (cost=0.14..0.16 rows=1 width=8) (actual time=0.001..0.001 rows=1 loops=25724) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=51448 Planning time: 9.042 ms Execution time: 9671.196 ms (68 rows) COMMIT; COMMIT