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 = 9 and p_type like '%NICKEL' 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=804979.45..804979.46 rows=1 width=190) (actual time=11747.969..11747.993 rows=100 loops=1) Buffers: shared hit=1527028 read=348928 written=29 -> Sort (cost=804979.45..804979.46 rows=1 width=190) (actual time=11747.966..11747.978 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=1527028 read=348928 written=29 -> Merge Join (cost=381554.45..804979.44 rows=1 width=190) (actual time=8868.594..11741.669 rows=4661 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1657 Buffers: shared hit=1527020 read=348928 written=29 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=8049 width=30) (actual time=0.044..1228.359 rows=7886 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 9)) Rows Removed by Filter: 1992114 Buffers: shared hit=756 read=45985 -> Sort (cost=381554.03..385551.87 rows=1599136 width=168) (actual time=8867.173..9443.254 rows=1603256 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1373553 read=296726 written=29 -> Nested Loop (cost=2.00..216772.17 rows=1599136 width=168) (actual time=0.080..6635.350 rows=1603360 loops=1) Buffers: shared hit=1373553 read=296726 written=29 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.068..105.635 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=0.007..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=0.052..90.261 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=0.011..33.744 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: 10kB Buffers: shared hit=1 -> Seq Scan on nation (cost=0.00..1.25 rows=25 width=34) (actual time=0.004..0.012 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=0.017..0.305 rows=80 loops=20042) Index Cond: (ps_suppkey = supplier.s_suppkey) Buffers: shared hit=1371372 read=296726 written=29 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.062..0.062 rows=1 loops=6318) Buffers: shared hit=152711 read=6217 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.040..0.060 rows=2 loops=6318) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=152711 read=6217 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.002 rows=1 loops=6318) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6318 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.027..0.056 rows=4 loops=6318) Buffers: shared hit=146393 read=6217 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.025..0.047 rows=4 loops=6318) Buffers: shared hit=95849 read=6217 -> Index Scan using pk_partsupp on partsupp partsupp_1 (cost=0.43..13.75 rows=4 width=8) (actual time=0.018..0.020 rows=4 loops=6318) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=19891 read=6217 -> 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=25272) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=75958 -> 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=25272) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=50544 Planning time: 6.536 ms Execution time: 11817.319 ms (68 rows) COMMIT; COMMIT