You are very close to a standalone test case. Please create such. Then post it on
bugs.mysql.com .
> -----Original Message-----
> From: GF [mailto:ganfab@stripped]
> Sent: Friday, June 15, 2012 12:45 AM
> To: Rick James
> Cc: Shawn Green; mysql@stripped
> Subject: Re: Foreign key and uppercase / lowercase values
>
> I think the following might give complete information (I removed some
> columns not involved in the problem)
>
> Server version: 5.1.49-3 (Debian)
>
> SET collation_connection = utf8_unicode_ci; Query OK, 0 rows affected
> (0.00 sec)
>
>
>
> show variables like '%colla%';
> +----------------------+-----------------+
> | Variable_name | Value |
> +----------------------+-----------------+
> | collation_connection | utf8_unicode_ci |
> | collation_database | utf8_unicode_ci |
> | collation_server | utf8_unicode_ci |
> +----------------------+-----------------+
> 3 rows in set (0.00 sec)
>
> show variables like '%char%';
> +--------------------------+----------------------------+
> | Variable_name | Value |
> +--------------------------+----------------------------+
> | character_set_client | utf8 |
> | character_set_connection | utf8 |
> | character_set_database | utf8 |
> | character_set_filesystem | binary |
> | character_set_results | utf8 |
> | character_set_server | utf8 |
> | character_set_system | utf8 |
> | character_sets_dir | /usr/share/mysql/charsets/ |
> +--------------------------+----------------------------+
> 8 rows in set (0.00 sec)
>
>
> select USER_ID from TBL_USER where USER_ID = 'GIUSEPPE';
> +----------+
> | USER_ID |
> +----------+
> | GIUSEPPE |
> +----------+
> 1 row in set (0.00 sec)
>
> select USER_ID from TBL_USER where USER_ID = 'giuseppe';
> +----------+
> | USER_ID |
> +----------+
> | GIUSEPPE |
> +----------+
> 1 row in set (0.00 sec)
>
>
> update TBL_USER set USER_ID = LOWER(USER_ID) where USER_ID =
> 'GIUSEPPE'; ERROR 1451 (23000): Cannot delete or update a parent row: a
> foreign key constraint fails (`myschema`.`TBL_COMMENT`, CONSTRAINT
> `FK4F6E52581590B46E` FOREIGN KEY (`USER_ID`) REFERENCES `TBL_USER`
> (`USER_ID`))
>
>
>
> | TBL_USER | CREATE TABLE `TBL_USER` (
> `USER_ID` varchar(50) COLLATE utf8_unicode_ci NOT NULL,
>
> << cut >>
> PRIMARY KEY (`USER_ID`),
> << cut >>
> ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci |
>
>
>
> | TBL_COMMENT | CREATE TABLE `TBL_COMMENT` (
> << cut >>
> `ID` bigint(20) NOT NULL AUTO_INCREMENT,
> << cut >>
> `USER_ID` varchar(50) COLLATE utf8_unicode_ci DEFAULT NULL,
> << cut >>
> PRIMARY KEY (`ID`),
> << cut >>
> KEY `FK4F6E52581590B46E` (`USER_ID`),
> << cut >>
> CONSTRAINT `FK4F6E52581590B46E` FOREIGN KEY (`USER_ID`) REFERENCES
> `TBL_USER` (`USER_ID`),
> << cut >>
> ) ENGINE=InnoDB AUTO_INCREMENT=7876 DEFAULT CHARSET=utf8
> COLLATE=utf8_unicode_ci |
