MySQL Bugs: #73840: SYSTEM_TIME_ZONE is truncated at 29 characters

Bug #73840	SYSTEM_TIME_ZONE is truncated at 29 characters
Submitted:	8 Sep 2014 17:02	Modified:	8 Sep 2014 22:40
Reporter:	Eric U	Email Updates:
Status:	Verified	Impact on me:	None
Category:	MySQL Server: DML	Severity:	S3 (Non-critical)
Version:	5.5/5.6/5.7	OS:	Microsoft Windows
Assigned to:		CPU Architecture:	Any

Description:
On Windows Server 2003 R2 or Windows 2008 R2 when the OS timezone is set to a value that is longer than 29 characters, e.g. "E. South America Daylight Time" (Brasilia) or "Central European Standard Time" (Sarajevo), the SYSTEM_TIME_ZONE global variable on the MySQL server only contains the first 29 characters.  In both examples of these time zones, the final 'e' character is removed.

This is a problem because in Connector J, TimeUtil.java expects the full 30 character names, as shown at http://bazaar.launchpad.net/~mysql/connectorj/5.1/view/head:/src/com/mysql/jdbc/TimeUtil.j...

A default install of MySQL has global and session time zones set to SYSTEM.  A workaround for this issue is to set the default-time-zone in the my.ini file.

The length of the VARIABLE_VALUE column in GLOBAL_VARIABLES is 1024, so does not appear to be caused by that.

How to repeat:
Check that the "SYSTEM" timezone is being used in a MySQL server that is installed on Windows Server 2003 or 2008 (I did not test Win 2012).

Set OS timezone to "(GMT -03:00) Brasilia" and restart MySQL service if it was already running.

Run:
select * from GLOBAL_VARIABLES where variable_name="SYSTEM_TIME_ZONE";

The actual result is that "E. South America Standard Tim" is returned.
The expected result is that "E. South America Standard Time" should be returned.

Screenshot showing output of query and also confirming MySQL version

Attachment: MySQLTimeZoneTruncated.PNG (image/png, text), 52.84 KiB.

C:\dbs>net start mysqld56
The MySQLD56 service is starting..
The MySQLD56 service was started successfully.

C:\dbs>56

C:\dbs>c:\dbs\5.6\bin\mysql -uroot --port=3560 --debug-info --prompt="mysql 5.6 > "
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.21 Source distribution

Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

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

mysql 5.6 > USE INFORMATION_SCHEMA
Database changed
mysql 5.6 > select * from GLOBAL_VARIABLES where variable_name="SYSTEM_TIME_ZONE";
+------------------+-------------------------------+
| VARIABLE_NAME    | VARIABLE_VALUE                |
+------------------+-------------------------------+
| SYSTEM_TIME_ZONE | E. South America Standard Tim |
+------------------+-------------------------------+
1 row in set (0.00 sec)

mysql 5.6 > DESC GLOBAL_VARIABLES\G
*************************** 1. row ***************************
  Field: VARIABLE_NAME
   Type: varchar(64)
   Null: NO
    Key:
Default:
  Extra:
*************************** 2. row ***************************
  Field: VARIABLE_VALUE
   Type: varchar(1024)
   Null: YES
    Key:
Default: NULL
  Extra:
2 rows in set (0.03 sec)

mysql 5.6 > exit
Bye

C:\dbs>tzutil /g
E. South America Standard Time_dstoff
C:\dbs>

Thank you for the bug report.

Any update on the fix?