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 = 29 and p_type like '%TIN' and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'MIDDLE EAST' 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 = 'MIDDLE EAST' ) order by s_acctbal desc, n_name, s_name, p_partkey LIMIT 100; QUERY PLAN --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Limit (cost=807570.72..807570.72 rows=1 width=190) (actual time=7115.221..7115.245 rows=100 loops=1) Buffers: shared hit=1829792 read=48264 written=1 -> Sort (cost=807570.72..807570.72 rows=1 width=190) (actual time=7115.218..7115.232 rows=100 loops=1) Sort Key: supplier.s_acctbal, nation.n_name, supplier.s_name, part.p_partkey Sort Method: top-N heapsort Memory: 51kB Buffers: shared hit=1829792 read=48264 written=1 -> Merge Join (cost=381649.99..807570.71 rows=1 width=190) (actual time=4962.970..7110.075 rows=4745 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1658 Buffers: shared hit=1829784 read=48264 written=1 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=8071 width=30) (actual time=0.678..988.198 rows=8044 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 29)) Rows Removed by Filter: 1991956 Buffers: shared hit=41278 read=5463 -> Sort (cost=381649.56..385649.56 rows=1600000 width=168) (actual time=4961.568..5304.102 rows=1603224 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1632372 read=37907 written=1 -> Nested Loop (cost=2.00..216772.44 rows=1600000 width=168) (actual time=0.069..3442.169 rows=1603360 loops=1) Buffers: shared hit=1632372 read=37907 written=1 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.054..97.369 rows=20042 loops=1) Join Filter: (nation.n_regionkey = region.r_regionkey) Rows Removed by Join Filter: 79958 Buffers: shared hit=1837 read=344 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.006..0.006 rows=1 loops=1) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=1 -> Hash Join (cost=1.56..4555.56 rows=100000 width=168) (actual time=0.040..83.684 rows=100000 loops=1) Hash Cond: (supplier.s_nationkey = nation.n_nationkey) Buffers: shared hit=1836 read=344 -> Seq Scan on supplier (cost=0.00..3179.00 rows=100000 width=142) (actual time=0.006..34.502 rows=100000 loops=1) Buffers: shared hit=1835 read=344 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.017..0.017 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..0.006 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=0.013..0.148 rows=80 loops=20042) Index Cond: (ps_suppkey = supplier.s_suppkey) Buffers: shared hit=1630535 read=37563 written=1 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.051..0.051 rows=1 loops=6403) Buffers: shared hit=156134 read=4894 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.033..0.049 rows=2 loops=6403) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=156134 read=4894 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.002 rows=1 loops=6403) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6403 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.022..0.045 rows=4 loops=6403) Buffers: shared hit=149731 read=4894 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.020..0.037 rows=4 loops=6403) Buffers: shared hit=98507 read=4894 -> Index Scan using pk_partsupp on partsupp partsupp_1 (cost=0.43..13.75 rows=4 width=8) (actual time=0.014..0.015 rows=4 loops=6403) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22025 read=4412 -> Index Scan using pk_supplier on supplier supplier_1 (cost=0.29..8.31 rows=1 width=8) (actual time=0.004..0.004 rows=1 loops=25612) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=76482 read=482 -> 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=25612) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=51224 Planning time: 5.177 ms Execution time: 7166.591 ms (68 rows) COMMIT; COMMIT