Details
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Bug
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Status: Closed (View Workflow)
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Major
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Resolution: Duplicate
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10.2.12, 10.3.4
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None
Description
In MySQL 5.6 stored routines are aware of metadata changes, and automatic re-prepare happens in a similar fashion as with prepared statements, see e.g.:
http://alexandernozdrin.blogspot.de/2012/09/mysql-56-handling-metadata-changes-in.html
MariaDB stored procedures are not aware of metadata changes though.
Example:
Setup:
MariaDB [test]> CREATE TABLE t1(a INT);
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Query OK, 0 rows affected (0.04 sec)
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MariaDB [test]> insert into t1 values(1),(2),(3);
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Query OK, 3 rows affected (0.02 sec)
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Records: 3 Duplicates: 0 Warnings: 0
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MariaDB [test]> CREATE PROCEDURE p1() SELECT * FROM t1;
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Query OK, 0 rows affected (0.00 sec)
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MariaDB [test]> call p1();
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+------+
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| a |
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+------+
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| 1 |
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| 2 |
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| 3 |
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+------+
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3 rows in set (0.01 sec)
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Query OK, 0 rows affected (0.01 sec)
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MariaDB [test]> ALTER TABLE t1 ADD COLUMN b INT DEFAULT -1;
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Query OK, 0 rows affected (0.02 sec)
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Records: 0 Duplicates: 0 Warnings: 0
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Now calling the procedure again in the same session
MySQL 5.6 returns:
MySQL[test]> call p1();
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+------+------+
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| a | b |
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+------+------+
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| 1 | -1 |
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| 2 | -1 |
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| 3 | -1 |
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+------+------+
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3 rows in set (0.00 sec)
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Query OK, 0 rows affected (0.00 sec)
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MariaDB does not notice the schema change though, and so the procedure still returns only one column instead of two when called from the same session as before:
MariaDB [test]> call p1();
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+------+
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| a |
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+------+
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| 1 |
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| 2 |
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| 3 |
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+------+
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3 rows in set (0.00 sec)
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Query OK, 0 rows affected (0.00 sec)
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Attachments
Issue Links
- duplicates
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- Confirmed
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