MySQL的CURRENT_TIMESTAMP给我所有0

如果我运行下面的查询：MySQL的CURRENT_TIMESTAMP给我所有0

ALTER TABLE `price_s` ADD COLUMN `ts` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP AFTER `price_s_id` ;

新列将与0000-00-00 00:00:00填充。在修改该列之前，此列中的值不会更新为当前时间戳，即ON UPDATE CURRENT_TIMESTAMP似乎正常工作。

如果我运行：

SELECT version() , @@time_zone , @@system_time_zone , NOW() , UTC_TIMESTAMP()

我：

'5.5.15', '+10:00', 'EST', '2012-08-23 14:56:59', '2012-08-23 04:56:59'

我想UTC时间存储在列ts，我该怎么做呢？

不知道这是否是相关的，我试图生成mysql.time_zone*表：

Miranda-Macbook: ./mysql_tzinfo_to_sql /usr/share/zoneinfo | ./mysql -p -u root mysql 
Enter password: Warning: Unable to load '/usr/share/zoneinfo/+VERSION' as time zone. Skipping it. 

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. 
Warning: Unable to load '/usr/share/zoneinfo/iso3166.tab' as time zone. Skipping it. 
Warning: Unable to load '/usr/share/zoneinfo/zone.tab' as time zone. Skipping it.

感谢@Sameer和@Marc B. 现在我明白时间戳以上（本article的帮助下）它已经存储在UTC，所以我需要的其实是：

SET time_zone = 'SYSTEM'; 
UPDATE tablename SET ts=now()

来源

2012-08-23 Miranda

我希望您不要指望当您添加该列时表中的现有行将获取当前时间戳。现有的行将获得值0.插入的任何新行都将具有当前的时间戳。对于现有的行，您需要运行一次性更新命令。 – Sameer

INSERT INTO yourtable (ts) VALUES (now()) 
UPDATE yourtable SET ts=now()

只要无论你是小号tuffing到ts字段是一个有效的mysql时间戳字符串（yyyy-mm-dd hh:mm:ss）它不关心时区是什么。这只与转换或检索有关 - mysql datefields本身没有时区的概念，它们只是某些日期/时间数据的存储库。

来源

2012-08-23 05:08:43

MySQL的CURRENT_TIMESTAMP给我所有0

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