Bug #6398 update of primary key fails

• Submitted: 3 Nov 2004 10:57
• Modified: 6 Nov 2004 13:25
• Reporter: Tomas Ulin
• Status: Closed
• Category: MySQL Cluster: Cluster (NDB) storage engine
• Severity: S1 (Critical)
• Version: 4.1.8 bk
• Assigned to: Martin Skold
• CPU Architecture: Any

[3 Nov 2004 10:57] Tomas Ulin

Description:

mysql> create table t1 (a int primary key);
Query OK, 0 rows affected (0.05 sec)

mysql> insert into t1 values (1);
Query OK, 1 row affected (0.00 sec)

mysql> select * from t1;
+---+
| a |
+---+
| 1 |
+---+
1 row in set (0.00 sec)

mysql> update t1 set a=20 where a=1;
Query OK, 1 row affected (0.01 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> select * from t1;
+---+
| a |
+---+
| 1 |
+---+
1 row in set (0.00 sec)

mysql> update t1 set a=a+1;
Query OK, 1 row affected (0.01 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> select * from t1;
+---+
| a |
+---+
| 2 |
+---+
1 row in set (0.03 sec)

How to repeat:
create table t1 (a int primary key);
insert into t1 values (1);
select * from t1;
update t1 set a=20 where a=1;
select * from t1;
update t1 set a=a+1;
select * from t1;

[3 Nov 2004 15:04] Martin Skold

delete_row is using the wrong key when updating as the result of a primary key read.
Changed to read key from old_data for primary_key_updates.