diff options
Diffstat (limited to 'mysql-test/main/secondary_key_costs.result')
| -rw-r--r-- | mysql-test/main/secondary_key_costs.result | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/mysql-test/main/secondary_key_costs.result b/mysql-test/main/secondary_key_costs.result index 55c84705..dbdaaa3e 100644 --- a/mysql-test/main/secondary_key_costs.result +++ b/mysql-test/main/secondary_key_costs.result @@ -80,3 +80,38 @@ json_detailed(json_extract(@trace, '$**.considered_access_paths')) ] ] drop table t1, name, flag2; +select @@optimizer_adjust_secondary_key_costs; +@@optimizer_adjust_secondary_key_costs + +set @@optimizer_adjust_secondary_key_costs=7; +select @@optimizer_adjust_secondary_key_costs; +@@optimizer_adjust_secondary_key_costs +adjust_secondary_key_cost,disable_max_seek,disable_forced_index_in_group_by +set @@optimizer_adjust_secondary_key_costs=default; +# +# MDEV-33306 Optimizer choosing incorrect index in 10.6, 10.5 but not in 10.4 +# +create table t1 (a int primary key, b int, c int, d int, key(b),key(c)) engine=innodb; +insert into t1 select seq, mod(seq,10), mod(seq,2), seq from seq_1_to_50000; +explain select b, sum(d) from t1 where c=0 group by b; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index c b 5 NULL # Using where +select b, sum(d) from t1 where c=0 group by b; +b sum(d) +0 125025000 +2 124985000 +4 124995000 +6 125005000 +8 125015000 +set @@optimizer_adjust_secondary_key_costs="disable_forced_index_in_group_by"; +explain select b, sum(d) from t1 where c=0 group by b; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL c NULL NULL NULL # Using where; Using temporary; Using filesort +select b, sum(d) from t1 where c=0 group by b; +b sum(d) +0 125025000 +2 124985000 +4 124995000 +6 125005000 +8 125015000 +drop table t1; |