mysql> SELECT '10' COLLATE utf8_general_ci XOR '20' COLLATE utf8_unicode_ci;
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ERROR 1267 (HY000): Illegal mix of collations (utf8_general_ci,EXPLICIT) and (utf8_unicode_ci,EXPLICIT) for operation 'xor'
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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;
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+-------------------------------------------------------------+
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| '10' COLLATE utf8_general_ci + '20' COLLATE utf8_unicode_ci |
|
+-------------------------------------------------------------+
|
| 30 |
|
+-------------------------------------------------------------+
|
1 row in set (0.00 sec)
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Bug
Major