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 = 29 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=805451.04..805451.05 rows=1 width=190) (actual time=9831.932..9831.958 rows=100 loops=1) Buffers: shared hit=1649523 read=226112 written=1020 -> Sort (cost=805451.04..805451.05 rows=1 width=190) (actual time=9831.930..9831.946 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=1649523 read=226112 written=1020 -> Merge Join (cost=381398.14..805451.03 rows=1 width=190) (actual time=7296.008..9824.839 rows=4676 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1629 Buffers: shared hit=1649515 read=226112 written=1020 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=8035 width=30) (actual time=0.547..1251.638 rows=8058 loops=1) Filter: (((p_type)::text ~~ '%BRASS'::text) AND (p_size = 29)) Rows Removed by Filter: 1991942 Buffers: shared hit=2392 read=44349 written=922 -> Sort (cost=381397.71..385392.00 rows=1597715 width=168) (actual time=7294.891..7657.573 rows=1603330 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1493019 read=177260 written=13 -> Nested Loop (cost=2.00..216772.52 rows=1597715 width=168) (actual time=0.076..5113.356 rows=1603360 loops=1) Buffers: shared hit=1493019 read=177260 written=13 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.059..106.112 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=0.045..89.576 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..31.520 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.022..0.022 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..0.004 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=0.015..0.228 rows=80 loops=20042) Index Cond: (ps_suppkey = supplier.s_suppkey) Buffers: shared hit=1490838 read=177260 written=13 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.057..0.057 rows=1 loops=6305) Buffers: shared hit=154104 read=4503 written=85 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.037..0.055 rows=2 loops=6305) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=154104 read=4503 written=85 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.002 rows=1 loops=6305) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6305 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.024..0.051 rows=4 loops=6305) Buffers: shared hit=147799 read=4503 written=85 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.022..0.040 rows=4 loops=6305) Buffers: shared hit=97359 read=4503 written=85 -> Index Scan using pk_partsupp on partsupp partsupp_1 (cost=0.43..13.75 rows=4 width=8) (actual time=0.015..0.017 rows=4 loops=6305) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=21573 read=4503 written=85 -> Index Scan using pk_supplier on supplier supplier_1 (cost=0.29..8.31 rows=1 width=8) (actual time=0.005..0.005 rows=1 loops=25220) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=75786 -> Index Scan using pk_nation on nation nation_1 (cost=0.14..0.16 rows=1 width=8) (actual time=0.002..0.002 rows=1 loops=25220) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=50440 Planning time: 5.809 ms Execution time: 9867.159 ms (68 rows) COMMIT; COMMIT