Here is the mtr test,
CREATE TABLE t1 (a INT);
|
INSERT INTO t1 VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), (10);
|
set optimizer_use_condition_selectivity=4;
|
CREATE FUNCTION f1() RETURNS INT DETERMINISTIC
|
BEGIN
|
SET @cnt := @cnt + 1;
|
RETURN 1;
|
END;|
|
SET @cnt := 0;
|
SELECT * FROM t1 WHERE a = f1();
|
a
|
1
|
SELECT @cnt;
|
@cnt
|
2
|
SET @cnt := 0;
|
set optimizer_use_condition_selectivity=1;
|
SELECT * FROM t1 WHERE a = f1();
|
a
|
1
|
drop table t1;
|
drop function f1;
|
cc igorpsergey
- relates to
-
MDEV-15253
Default optimizer setting changes for MariaDB 10.4
-
-
Closed
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