ERROR 1271 (HY000): Illegal Mix Of Collations for Operation 'concat' in MySQL 5.1 Versions

(Doc ID 1563850.1)

Last updated on MARCH 08, 2017

Applies to:

MySQL Server - Version 5.1 and later
Information in this document applies to any platform.
Only affects versions 5.1 and earlier. Will not be fixed in 5.1 version.


On : 5.1 version, Character Sets and Localization

When attempting to replicate data inserted via a function after character set change,
the following error occurs.

ERROR 1271 (HY000): Illegal mix of collations for operation 'concat'

The issue can be reproduced at will with the following steps:
1. Set database character set to utf8
2. Create and replicate a function
3. Insert data using function and check error on slave

The issue has the following business impact:
Due to this issue, users cannot easily replicate data after character set change .


 Changes in the character set and/or collation.


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