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 = 18 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=797057.02..797057.02 rows=1 width=190) (actual time=10962.224..10962.249 rows=100 loops=1) Buffers: shared hit=1569390 read=306324 written=78 -> Sort (cost=797057.02..797057.02 rows=1 width=190) (actual time=10962.222..10962.234 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=1569390 read=306324 written=78 -> Merge Join (cost=381593.57..797057.01 rows=1 width=190) (actual time=8601.692..10957.202 rows=4685 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=1569382 read=306324 written=78 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=7806 width=30) (actual time=0.244..1112.884 rows=7953 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 18)) Rows Removed by Filter: 1992047 Buffers: shared hit=19754 read=26987 written=17 -> Sort (cost=381593.06..385591.78 rows=1599488 width=168) (actual time=8601.055..8952.106 rows=1602616 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1395164 read=274262 written=61 -> Nested Loop (cost=2.00..216772.39 rows=1599488 width=168) (actual time=0.098..5968.947 rows=1602640 loops=1) Buffers: shared hit=1395164 read=274262 written=61 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.057..106.357 rows=20033 loops=1) Join Filter: (nation.n_regionkey = region.r_regionkey) Rows Removed by Join Filter: 79967 Buffers: shared hit=2181 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.008..0.010 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=0.040..91.225 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=0.007..35.172 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.019..0.019 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=0.005..0.009 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=0.016..0.271 rows=80 loops=20033) Index Cond: (ps_suppkey = supplier.s_suppkey) Buffers: shared hit=1392983 read=274262 written=61 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.059..0.059 rows=1 loops=6342) Buffers: shared hit=154464 read=5075 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.038..0.057 rows=2 loops=6342) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=154464 read=5075 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.002 rows=1 loops=6342) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6342 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.025..0.053 rows=4 loops=6342) Buffers: shared hit=148122 read=5075 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.022..0.044 rows=4 loops=6342) Buffers: shared hit=97388 read=5073 -> Index Scan using pk_partsupp on partsupp partsupp_1 (cost=0.43..13.75 rows=4 width=8) (actual time=0.015..0.016 rows=4 loops=6342) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=21151 read=5073 -> 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=25368) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=76237 -> 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=25368) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=50734 read=2 Planning time: 5.306 ms Execution time: 11006.077 ms (68 rows) COMMIT; COMMIT