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 = 13 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=802783.11..802783.12 rows=1 width=190) (actual time=12509.223..12509.259 rows=100 loops=1) Buffers: shared hit=1790930 read=89290 written=186 -> Sort (cost=802783.11..802783.12 rows=1 width=190) (actual time=12509.220..12509.245 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=1790930 read=89290 written=186 -> Merge Join (cost=381650.08..802783.10 rows=1 width=190) (actual time=9676.021..12502.679 rows=4773 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1715 Buffers: shared hit=1790922 read=89290 written=186 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=7949 width=30) (actual time=0.562..1059.320 rows=8067 loops=1) Filter: (((p_type)::text ~~ '%NICKEL'::text) AND (p_size = 13)) Rows Removed by Filter: 1991933 Buffers: shared hit=46656 read=85 written=2 -> Sort (cost=381649.66..385649.66 rows=1600000 width=168) (actual time=9674.164..10174.292 rows=1602820 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 475045kB Buffers: shared hit=1585817 read=84462 written=51 -> Nested Loop (cost=2.00..216772.53 rows=1600000 width=168) (actual time=0.080..7751.841 rows=1603360 loops=1) Buffers: shared hit=1585817 read=84462 written=51 -> Nested Loop (cost=1.56..5806.62 rows=20000 width=164) (actual time=0.061..162.378 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..0.008 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..138.449 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..47.660 rows=100000 loops=1) Buffers: shared hit=2179 -> Hash (cost=1.25..1.25 rows=25 width=34) (actual time=0.020..0.020 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..0.009 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=0.025..0.345 rows=80 loops=20042) Index Cond: (ps_suppkey = supplier.s_suppkey) Buffers: shared hit=1583636 read=84462 written=51 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.065..0.065 rows=1 loops=6488) Buffers: shared hit=158449 read=4743 written=133 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.043..0.063 rows=2 loops=6488) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=158449 read=4743 written=133 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.003 rows=1 loops=6488) Filter: (r_name = 'MIDDLE EAST'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6488 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.029..0.059 rows=4 loops=6488) Buffers: shared hit=151961 read=4743 written=133 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.026..0.049 rows=4 loops=6488) Buffers: shared hit=100057 read=4743 written=133 -> Index Scan using pk_partsupp on partsupp partsupp_1 (cost=0.43..13.75 rows=4 width=8) (actual time=0.019..0.021 rows=4 loops=6488) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=22070 read=4734 written=133 -> 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=25952) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=77987 read=9 -> 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=25952) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=51904 Planning time: 7.556 ms Execution time: 12531.517 ms (68 rows) COMMIT; COMMIT