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 = 11 and p_type like '%TIN' and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'AMERICA' 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 = 'AMERICA' ) order by s_acctbal desc, n_name, s_name, p_partkey LIMIT 100; QUERY PLAN --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Limit (cost=878992.37..878992.38 rows=1 width=190) (actual time=9641.341..9641.364 rows=100 loops=1) Buffers: shared hit=177901 read=212069 written=4883 -> Sort (cost=878992.37..878992.38 rows=1 width=190) (actual time=9641.340..9641.351 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=177901 read=212069 written=4883 -> Merge Join (cost=465676.21..878992.36 rows=1 width=190) (actual time=7661.217..9636.403 rows=4717 loops=1) Merge Cond: (part.p_partkey = partsupp.ps_partkey) Join Filter: (partsupp.ps_supplycost = (SubPlan 1)) Rows Removed by Join Filter: 1699 Buffers: shared hit=177893 read=212069 written=4883 -> Index Scan using pk_part on part (cost=0.43..102473.43 rows=7828 width=30) (actual time=0.085..1155.671 rows=7961 loops=1) Filter: (((p_type)::text ~~ '%TIN'::text) AND (p_size = 11)) Rows Removed by Filter: 1992039 Buffers: shared hit=3068 read=43673 written=210 -> Sort (cost=465675.78..469675.54 rows=1599904 width=168) (actual time=7660.349..7789.945 rows=1604060 loops=1) Sort Key: partsupp.ps_partkey Sort Method: quicksort Memory: 475236kB Buffers: shared hit=20225 read=161636 written=4640 -> Hash Join (cost=3852.20..300809.24 rows=1599904 width=168) (actual time=159.423..6476.750 rows=1604080 loops=1) Hash Cond: (partsupp.ps_suppkey = supplier.s_suppkey) Buffers: shared hit=20225 read=161636 written=4640 -> Seq Scan on partsupp (cost=0.00..250958.00 rows=8000000 width=12) (actual time=0.002..3792.794 rows=8000000 loops=1) Buffers: shared hit=9324 read=161634 written=4640 -> Hash (cost=3602.20..3602.20 rows=20000 width=164) (actual time=159.281..159.281 rows=20051 loops=1) Buckets: 32768 Batches: 1 Memory Usage: 4153kB Buffers: shared hit=10901 read=2 -> Nested Loop (cost=332.07..3602.20 rows=20000 width=164) (actual time=0.354..147.749 rows=20051 loops=1) Buffers: shared hit=10901 read=2 -> Hash Join (cost=1.07..2.47 rows=5 width=30) (actual time=0.020..0.041 rows=5 loops=1) Hash Cond: (nation.n_regionkey = region.r_regionkey) Buffers: shared hit=2 -> Seq Scan on nation (cost=0.00..1.25 rows=25 width=34) (actual time=0.002..0.004 rows=25 loops=1) Buffers: shared hit=1 -> Hash (cost=1.06..1.06 rows=1 width=4) (actual time=0.010..0.010 rows=1 loops=1) Buckets: 1024 Batches: 1 Memory Usage: 9kB Buffers: shared hit=1 -> Seq Scan on region (cost=0.00..1.06 rows=1 width=4) (actual time=0.005..0.006 rows=1 loops=1) Filter: (r_name = 'AMERICA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=1 -> Bitmap Heap Scan on supplier (cost=331.00..679.95 rows=4000 width=142) (actual time=0.261..28.709 rows=4010 loops=5) Recheck Cond: (s_nationkey = nation.n_nationkey) Rows Removed by Index Recheck: 95990 Heap Blocks: lossy=10895 Buffers: shared hit=10899 read=2 -> Bitmap Index Scan on supplier_s_nationkey_s_suppkey_brin_idx (cost=0.00..330.00 rows=4000 width=0) (actual time=0.249..0.249 rows=23040 loops=5) Index Cond: (s_nationkey = nation.n_nationkey) Buffers: shared hit=4 read=2 SubPlan 1 -> Aggregate (cost=48.83..48.84 rows=1 width=4) (actual time=0.059..0.059 rows=1 loops=6416) Buffers: shared hit=154600 read=6760 written=33 -> Nested Loop (cost=0.86..48.83 rows=1 width=4) (actual time=0.038..0.054 rows=2 loops=6416) Join Filter: (nation_1.n_regionkey = region_1.r_regionkey) Rows Removed by Join Filter: 2 Buffers: shared hit=154600 read=6760 written=33 -> Seq Scan on region region_1 (cost=0.00..1.06 rows=1 width=4) (actual time=0.002..0.003 rows=1 loops=6416) Filter: (r_name = 'AMERICA'::bpchar) Rows Removed by Filter: 4 Buffers: shared hit=6415 read=1 -> Nested Loop (cost=0.86..47.71 rows=4 width=8) (actual time=0.027..0.050 rows=4 loops=6416) Buffers: shared hit=148185 read=6759 written=33 -> Nested Loop (cost=0.72..47.04 rows=4 width=8) (actual time=0.025..0.041 rows=4 loops=6416) Buffers: shared hit=96857 read=6759 written=33 -> Index Scan using pk_partsupp on partsupp partsupp_1 (cost=0.43..13.75 rows=4 width=8) (actual time=0.019..0.020 rows=4 loops=6416) Index Cond: (part.p_partkey = ps_partkey) Buffers: shared hit=19725 read=6759 written=33 -> Index Scan using pk_supplier on supplier supplier_1 (cost=0.29..8.31 rows=1 width=8) (actual time=0.004..0.004 rows=1 loops=25664) Index Cond: (s_suppkey = partsupp_1.ps_suppkey) Buffers: shared hit=77132 -> 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=25664) Index Cond: (n_nationkey = supplier_1.s_nationkey) Buffers: shared hit=51328 Planning time: 4.606 ms Execution time: 9658.444 ms (75 rows) COMMIT; COMMIT