[MDEV-19905] REPEAT statement_list has one more iteration Created: 2019-06-28  Updated: 2019-06-29  Resolved: 2019-06-29

Status: Closed
Project: MariaDB Server
Component/s: Data Definition - Procedure, Server
Affects Version/s: 10.3.16
Fix Version/s: 10.3.17

Type: Bug Priority: Major
Reporter: Anel Husakovic Assignee: Anel Husakovic
Resolution: Not a Bug Votes: 0
Labels: None


 Description   

Based on comment of a question in KB open question.
There is different result in 10.2 and 10.3 for REPEAT
stated here:

DELETE FROM t1;
 
 
 
DELIMITER //
 
 
 
CREATE PROCEDURE dorepeat(p1 INT)
 
  BEGIN
 
    SET @x = 0;
 
    REPEAT 
      SET @x = @x + 1; 
      INSERT INTO t1 VALUES ("");
 
    UNTIL @x >= p1 
    END REPEAT;
 
  END
 
//
 
 
 
CALL dorepeat(100)//
 
 
 
SELECT @x//
 
DELIMITER ;
 
SELECT * FROM t1;
 
DROP TABLE t1;

In 10.2 we are obtaining like so:

MariaDB [test]> SELECT @x//
 
+------+
 
| @x   |
 
+------+
 
|  100 |
 
+------+
 
1 row in set (0.001 sec)

and in 10.3 we are obtaining bug (one more iteration), like so:

MariaDB [test]> SELECT @x//
 
+------+
 
| @x   |
 
+------+
 
|  101 |
 
+------+
 
1 row in set (0.000 sec)



 Comments   
Comment by Anel Husakovic [ 2019-06-29 ]

I really cannot reproduce it (day after obtaining this bug). Don't know which settings I used to obtain the same.

For now I will close MDEV. If by chance, I figure it out what happened during my test phase, I will reopen it again.

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