[MDEV-6973] XOR aggregates argument collations Created: 2014-10-29  Updated: 2015-06-09  Resolved: 2015-06-09

Status: Closed
Project: MariaDB Server
Component/s: Character Sets
Affects Version/s: 5.5.40, 10.0.14, 10.1
Fix Version/s: 10.1.6

Type: Bug Priority: Major
Reporter: Alexander Barkov Assignee: Alexander Barkov
Resolution: Fixed Votes: 0
Labels: None


 Description    

mysql> SELECT '10' COLLATE utf8_general_ci XOR '20' COLLATE utf8_unicode_ci;
 
ERROR 1267 (HY000): Illegal mix of collations (utf8_general_ci,EXPLICIT) and (utf8_unicode_ci,EXPLICIT) for operation 'xor'

XOR is a numeric operation. It should not aggregate collations. The above query should return a result without an error.

Notice, the other numeric operations work without problems:

mysql> SELECT '10' COLLATE utf8_general_ci + '20' COLLATE utf8_unicode_ci;
 
+-------------------------------------------------------------+
 
| '10' COLLATE utf8_general_ci + '20' COLLATE utf8_unicode_ci |
 
+-------------------------------------------------------------+
 
|                                                          30 |
 
+-------------------------------------------------------------+
 
1 row in set (0.00 sec)


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