mysql convert_tz 命令返回 NULL

Question

我在 mysql 中遇到 convert_tz 返回 null 的问题。

mysql --version
mysql  Ver 14.14 Distrib 5.6.11, for osx10.7 (x86_64) using  EditLine wrapper 

我阅读了手册 http://dev.mysql.com/doc/refman/5.5/en/time-zone-support.html我运行了这个命令: bash-3.2# mysql_tzinfo_to_sql/usr/share/zoneinfo | mysql -u root -p mysql 输入密码:警告:无法加载“/usr/share/zoneinfo/+VERSION”作为时区。跳过它。

Warning: Unable to load '/usr/share/zoneinfo/Asia/Riyadh87' as time zone. Skipping it.
Warning: Unable to load '/usr/share/zoneinfo/Asia/Riyadh88' as time zone. Skipping it.
Warning: Unable to load '/usr/share/zoneinfo/Asia/Riyadh89' as time zone. Skipping it.
Warning: Unable to load '/usr/share/zoneinfo/Mideast/Riyadh87' as time zone. Skipping it.
Warning: Unable to load '/usr/share/zoneinfo/Mideast/Riyadh88' as time zone. Skipping it.
Warning: Unable to load '/usr/share/zoneinfo/Mideast/Riyadh89' as time zone. Skipping it.
ERROR 1406 (22001) at line 38916: Data too long for column 'Abbreviation' at row 1

然后，我使用 mysql 运行了这个命令。 选择 CONVERT_TZ('2004-01-01 12:00:00','GMT','EST');返回空值。我可以确认 mysql.time_zone_transition_type 表有 GMT 和 EST 条目。

Answer 1

解决此问题的另一种方法是将 mysql_tzinfo 导出到文本文件进行编辑:

$ mysql_tzinfo_to_sql /usr/share/zoneinfo > tzinfo.sql

找到有问题的行，在我的例子中是第 38982 行，它是从第 38982 行到 38984 行的拆分查询:

INSERT INTO time_zone_transition_type (Time_zone_id, Transition_type_id, Offset, Is_DST,    Abbreviation) VALUES (@time_zone_id, 0, 0, 0, 'Local time zone must be set--see zic manual page');

将其更改为:

INSERT INTO time_zone_transition_type (Time_zone_id, Transition_type_id, Offset, Is_DST, Abbreviation) VALUES (@time_zone_id, 0, 0, 0, 'UNSET');

保存文件并将其插入到您的 mysql 数据库中:

$ cat tzinfo.sql | mysql -u root mysql

来源:http://dev.mysql.com/doc/refman/4.1/en/time-zone-support.html
已在 MacOS 10.9.3、MySQL 5.6.15 上测试