MySQL Bugs: #52430: Incorrect key in the error message for duplicate key error involving BINARY type

Bug #52430	Incorrect key in the error message for duplicate key error involving BINARY type
Submitted:	29 Mar 2010 11:01	Modified:	7 Jul 2010 19:02
Reporter:	Nirbhay Choubey	Email Updates:
Status:	Closed	Impact on me:	None
Category:	MySQL Server: Data Types	Severity:	S3 (Non-critical)
Version:	5.5.3-m3	OS:	Any
Assigned to:	Sergei Glukhov	CPU Architecture:	Any
Tags:	5.1.45, 5.5.3-m3, regression

Description:
Server throws incorrect duplicate-key in the error message for duplicate key error
involving multicolumn key of 'BINARY' type. (for mysql-5.5.x)

CREATE TABLE t1(c1 BINARY(10) NOT NULL, c2 BINARY(10) NOT NULL, c3 BINARY(10) NOT NULL, PRIMARY KEY(c1,c2,c3));
INSERT INTO t1 (c1,c2,c3) VALUES('abc','abc','abc');

INSERT INTO t1 (c1,c2,c3) VALUES('abc','abc','abc');
ERROR 1062 (23000): Duplicate entry 'abc\x00\x00\x00\x00\x00\x00\x00-abc\x00\x00\x00\x00\x00\x00\x00-' for key 'PRIMARY'

The above error message do not seem to represent correct duplicate key value.

While if the data-type is changed to VARBINARY, the error message looks fine :

ERROR 1062 (23000): Duplicate entry 'abc-abc-abc' for key 'PRIMARY'

Similarly, if the above set of statements (for BINARY data-type ) is tried on 5.1.45, the error message is : 

ERROR 1062 (23000): Duplicate entry 'abc' for key 'PRIMARY'

Which again looks incorrect to me.

How to repeat:
CREATE TABLE t1(c1 BINARY(10) NOT NULL, c2 BINARY(10) NOT NULL, c3 BINARY(10) NOT NULL, PRIMARY KEY(c1,c2,c3));
INSERT INTO t1 (c1,c2,c3) VALUES('abc','abc','abc');
INSERT INTO t1 (c1,c2,c3) VALUES('abc','abc','abc');

Thank you for the bug report.

Microsoft Windows [Version 6.0.6002]
Copyright (c) 2006 Microsoft Corporation.  All rights reserved.

C:\DBS>50

C:\DBS>c:\dbs\5.0\bin\mysql -uroot --port=3500 --prompt="mysql 5.0 > "
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.0.91-Win X64-log Source distribution

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql 5.0 > use test
Database changed
mysql 5.0 > drop table t1;
Query OK, 0 rows affected (0.06 sec)

mysql 5.0 > CREATE TABLE t1(c1 BINARY(10) NOT NULL, c2 BINARY(10) NOT NULL, c3 BINARY(10) NOT NULL,
    -> PRIMARY KEY(c1,c2,c3));
Query OK, 0 rows affected (0.09 sec)

mysql 5.0 > INSERT INTO t1 (c1,c2,c3) VALUES('abc','abc','abc');
Query OK, 1 row affected (0.00 sec)

mysql 5.0 > INSERT INTO t1 (c1,c2,c3) VALUES('abc','abc','abc');
ERROR 1062 (23000): Duplicate entry 'abc' for key 1
mysql 5.0 > exit
Bye

C:\DBS>51

C:\DBS>c:\dbs\5.1\bin\mysql -uroot --port=3306 --prompt="mysql 5.1 >"
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.1.46-Win X64-log Source distribution

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql 5.1 >use test
Database changed
mysql 5.1 >drop table t1;
Query OK, 0 rows affected (0.00 sec)

mysql 5.1 >CREATE TABLE t1(c1 BINARY(10) NOT NULL, c2 BINARY(10) NOT NULL, c3 BINARY(10) NOT NULL,
    -> PRIMARY KEY(c1,c2,c3));
Query OK, 0 rows affected (0.07 sec)

mysql 5.1 >INSERT INTO t1 (c1,c2,c3) VALUES('abc','abc','abc');
Query OK, 1 row affected (0.00 sec)

mysql 5.1 >INSERT INTO t1 (c1,c2,c3) VALUES('abc','abc','abc');
ERROR 1062 (23000): Duplicate entry 'abc' for key 'PRIMARY'
mysql 5.1 >exit
Bye

C:\DBS>55

C:\DBS>c:\dbs\5.5\bin\mysql -uroot --port=3540 --prompt="mysql 5.5 >"
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.99-m4-Win X64 Source distribution

Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
This software comes with ABSOLUTELY NO WARRANTY. This is free software,
and you are welcome to modify and redistribute it under the GPL v2 license

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql 5.5 >use test
Database changed
mysql 5.5 >drop table t1;
Query OK, 0 rows affected (0.00 sec)

mysql 5.5 >CREATE TABLE t1(c1 BINARY(10) NOT NULL, c2 BINARY(10) NOT NULL, c3 BINARY(10) NOT NULL,
    -> PRIMARY KEY(c1,c2,c3));
Query OK, 0 rows affected (0.05 sec)

mysql 5.5 >INSERT INTO t1 (c1,c2,c3) VALUES('abc','abc','abc');
Query OK, 1 row affected (0.00 sec)

mysql 5.5 >INSERT INTO t1 (c1,c2,c3) VALUES('abc','abc','abc');
ERROR 1062 (23000): Duplicate entry 'abc\x00\x00\x00\x00\x00\x00\x00-abc\x00\x00\x00\x00\x00\x00\x00-' for key 'PRIMARY'
mysql 5.5 >

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/109360

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/109377

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/109379

http://lists.mysql.com/commits/109379 is Ok to push

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/109402

Pushed into 5.5.5-m3 (revid:alik@sun.com-20100615080459-smuswd9ooeywcxuc) (version source revid:alik@sun.com-20100615080459-smuswd9ooeywcxuc) (merge vers: 5.5.5-m3) (pib:16)

Pushed into mysql-next-mr (revid:alik@sun.com-20100615080558-cw01bzdqr1bdmmec) (version source revid:alik@sun.com-20100615080431-gu5icn0anrt47dsx) (pib:16)

Noted in 5.5.5 changelog.

Spurious duplicate-key errors occurred for multiple-column indexes on
columns with the BINARY data type.