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 = 27 and p_type like '%NICKEL' 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=805109.07..805109.07 rows=1 width=190) (actual time=9523.420..9523.457 rows=100 loops=1) Buffers: shared hit=1773692 read=104896 written=2370 -> Sort (cost=805109.07..805109.07 rows=1 width=190) (actual time=9523.417..9523.445 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=1773692 read=104896 written=2370 -> Merge Join (cost=381398.14..805109.06 rows=1 width=190) (actual time=6500.676..9516.403 rows=4780 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1679 Buffers: shared hit=1773684 read=104896 written=2370 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=8026 width=30) (actual time=0.269..1312.817 rows=8068 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 27)) Rows Removed by Filter: 1991932 Buffers: shared hit=756 read=45985 -> Sort (cost=381397.71..385392.00 rows=1597715 width=168) (actual time=6498.075..7096.252 rows=1602635 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 474854kB Buffers: shared hit=1615139 read=54287 written=2370 -> Nested Loop (cost=2.00..216772.52 rows=1597715 width=168) (actual time=0.113..4544.930 rows=1602640 loops=1) Buffers: shared hit=1615139 read=54287 written=2370 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.062..115.783 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..0.013 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=0.045..98.823 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=0.009..37.302 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.018..0.018 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=0.017..0.199 rows=80 loops=20033) Index Cond: (ps_suppkey = supplier.s_suppkey) Buffers: shared hit=1612958 read=54287 written=2370 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.062..0.062 rows=1 loops=6459) Buffers: shared hit=157789 read=4624 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.040..0.060 rows=2 loops=6459) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=157789 read=4624 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.003 rows=1 loops=6459) Filter: (r_name = 'EUROPE'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6459 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.027..0.056 rows=4 loops=6459) Buffers: shared hit=151330 read=4624 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.024..0.045 rows=4 loops=6459) Buffers: shared hit=99660 read=4622 -> Index Scan using pk_partsupp on partsupp partsupp_1 (cost=0.43..13.75 rows=4 width=8) (actual time=0.016..0.018 rows=4 loops=6459) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22030 read=4622 -> 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=25836) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=77630 -> 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=25836) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=51670 read=2 Planning time: 5.957 ms Execution time: 9592.732 ms (68 rows) COMMIT; COMMIT