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MDEV-21495: Conditional jump or move depends on uninitialised value in sel_arg_range_seq_next

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Initialize the parameter PARAM::max_key_part when we iterate over the ranges to get estimates
from EITS.
This commit is contained in:
Varun Gupta
2020-05-26 01:50:46 +05:30
parent cb9c49a9b2
commit 76f4ae8295
4 changed files with 43 additions and 0 deletions
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12
mysql-test/t/selectivity.test
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@ -1266,5 +1266,17 @@ set optimizer_switch= @save_optimizer_switch;
set optimizer_use_condition_selectivity= @save_optimizer_use_condition_selectivity;
drop table t1,t2;
--echo #
--echo # MDEV-21495: Conditional jump or move depends on uninitialised value in sel_arg_range_seq_next
--echo #
CREATE TABLE t1(a INT, b INT);
INSERT INTO t1 SELECT seq, seq from seq_1_to_100;
set optimizer_use_condition_selectivity=4;
ANALYZE TABLE t1 PERSISTENT FOR ALL;
SELECT * from t1 WHERE a = 5 and b = 5;
set optimizer_use_condition_selectivity= @save_optimizer_use_condition_selectivity;
drop table t1;
--echo # End of 10.1 tests