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 = 34 and p_type like '%BRASS' 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=886125.00..886125.01 rows=1 width=190) (actual time=8024.727..8024.749 rows=100 loops=1) Buffers: shared hit=166205 read=223841 -> Sort (cost=886125.00..886125.01 rows=1 width=190) (actual time=8024.725..8024.743 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=166205 read=223841 -> Merge Join (cost=465676.21..886124.99 rows=1 width=190) (actual time=6098.198..8020.066 rows=4762 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1653 Buffers: shared hit=166197 read=223841 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=8013 width=30) (actual time=0.201..1126.280 rows=7977 loops=1) Filter: (((p_type)::text ~~ '%BRASS'::text) AND (p_size = 34)) Rows Removed by Filter: 1992023 Buffers: shared hit=758 read=45983 -> Sort (cost=465675.78..469675.54 rows=1599904 width=168) (actual time=6097.373..6226.516 rows=1603234 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=8726 read=173135 -> Hash Join (cost=3852.20..300809.24 rows=1599904 width=168) (actual time=195.154..5029.906 rows=1603360 loops=1) Hash Cond: (partsupp.ps_suppkey = supplier.s_suppkey) Buffers: shared hit=8726 read=173135 -> Seq Scan on partsupp (cost=0.00..250958.00 rows=8000000 width=12) (actual time=0.003..2644.863 rows=8000000 loops=1) Buffers: shared hit=2 read=170956 -> Hash (cost=3602.20..3602.20 rows=20000 width=164) (actual time=195.020..195.020 rows=20042 loops=1) Buckets: 32768 Batches: 1 Memory Usage: 4144kB Buffers: shared hit=8724 read=2179 -> Nested Loop (cost=332.07..3602.20 rows=20000 width=164) (actual time=0.364..183.246 rows=20042 loops=1) Buffers: shared hit=8724 read=2179 -> Hash Join (cost=1.07..2.47 rows=5 width=30) (actual time=0.023..0.047 rows=5 loops=1) Hash Cond: (nation.n_regionkey = region.r_regionkey) Buffers: shared hit=2 -> Seq Scan on nation (cost=0.00..1.25 rows=25 width=34) (actual time=0.002..0.009 rows=25 loops=1) Buffers: shared hit=1 -> Hash (cost=1.06..1.06 rows=1 width=4) (actual time=0.010..0.010 rows=1 loops=1) Buckets: 1024 Batches: 1 Memory Usage: 9kB Buffers: shared hit=1 -> 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 -> Bitmap Heap Scan on supplier (cost=331.00..679.95 rows=4000 width=142) (actual time=0.267..35.682 rows=4008 loops=5) Recheck Cond: (s_nationkey = nation.n_nationkey) Rows Removed by Index Recheck: 95992 Heap Blocks: lossy=10895 Buffers: shared hit=8722 read=2179 -> Bitmap Index Scan on supplier_s_nationkey_s_suppkey_brin_idx (cost=0.00..330.00 rows=4000 width=0) (actual time=0.240..0.240 rows=23040 loops=5) Index Cond: (s_nationkey = nation.n_nationkey) Buffers: shared hit=4 read=2 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.054..0.054 rows=1 loops=6415) Buffers: shared hit=156713 read=4723 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.033..0.049 rows=2 loops=6415) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=156713 read=4723 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.003 rows=1 loops=6415) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6415 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.022..0.045 rows=4 loops=6415) Buffers: shared hit=150298 read=4723 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.020..0.035 rows=4 loops=6415) Buffers: shared hit=98978 read=4723 -> Index Scan using pk_partsupp on partsupp partsupp_1 (cost=0.43..13.75 rows=4 width=8) (actual time=0.014..0.016 rows=4 loops=6415) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22115 read=4451 -> 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=25660) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=76863 read=272 -> Index Scan using pk_nation on nation nation_1 (cost=0.14..0.16 rows=1 width=8) (actual time=0.001..0.002 rows=1 loops=25660) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=51320 Planning time: 8.422 ms Execution time: 8035.366 ms (75 rows) COMMIT; COMMIT