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 = 47 and p_type like '%COPPER' 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=801170.94..801170.95 rows=1 width=190) (actual time=11615.814..11615.849 rows=100 loops=1) Buffers: shared hit=1676769 read=202336 written=4926 -> Sort (cost=801170.94..801170.95 rows=1 width=190) (actual time=11615.811..11615.834 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=1676769 read=202336 written=4926 -> Merge Join (cost=381650.08..801170.93 rows=1 width=190) (actual time=8765.670..11609.006 rows=4714 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1729 Buffers: shared hit=1676761 read=202336 written=4926 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=7907 width=30) (actual time=0.134..1307.061 rows=8019 loops=1) Filter: (((p_type)::text ~~ '%COPPER'::text) AND (p_size = 47)) Rows Removed by Filter: 1991981 Buffers: shared hit=757 read=45984 written=53 -> Sort (cost=381649.66..385649.66 rows=1600000 width=168) (actual time=8765.160..9222.334 rows=1603316 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1521758 read=148521 written=4866 -> Nested Loop (cost=2.00..216772.53 rows=1600000 width=168) (actual time=0.072..5970.744 rows=1603360 loops=1) Buffers: shared hit=1521758 read=148521 written=4866 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.059..135.253 rows=20042 loops=1) Join Filter: (nation.n_regionkey = region.r_regionkey) Rows Removed by Join Filter: 79958 Buffers: shared hit=2181 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.006..0.007 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=0.046..116.437 rows=100000 loops=1) Hash Cond: (supplier.s_nationkey = nation.n_nationkey) Buffers: shared hit=2180 -> Seq Scan on supplier (cost=0.00..3179.00 rows=100000 width=142) (actual time=0.008..43.712 rows=100000 loops=1) Buffers: shared hit=2179 -> 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=0.003..0.007 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=0.019..0.266 rows=80 loops=20042) Index Cond: (ps_suppkey = supplier.s_suppkey) Buffers: shared hit=1519577 read=148521 written=4866 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.070..0.071 rows=1 loops=6443) Buffers: shared hit=154246 read=7831 written=7 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.047..0.068 rows=2 loops=6443) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=154246 read=7831 written=7 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.002 rows=1 loops=6443) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6443 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.033..0.064 rows=4 loops=6443) Buffers: shared hit=147803 read=7831 written=7 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.031..0.054 rows=4 loops=6443) Buffers: shared hit=96259 read=7831 written=7 -> Index Scan using pk_partsupp on partsupp partsupp_1 (cost=0.43..13.75 rows=4 width=8) (actual time=0.022..0.024 rows=4 loops=6443) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=18786 read=7831 written=7 -> Index Scan using pk_supplier on supplier supplier_1 (cost=0.29..8.31 rows=1 width=8) (actual time=0.006..0.006 rows=1 loops=25772) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=77473 -> Index Scan using pk_nation on nation nation_1 (cost=0.14..0.16 rows=1 width=8) (actual time=0.001..0.002 rows=1 loops=25772) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=51544 Planning time: 5.897 ms Execution time: 11680.604 ms (68 rows) COMMIT; COMMIT