问题
If I'm making a connection to MySQL with serverTimezone=UTC in my connection URL, will that change the @@session.time_zone variable for my connection to MySQL? Or is the only way to alter @@session.time_zone through issuing a SET time_zone... statement? I was lead to believe that the combination of serverTimezone=UTC and useLegacyDateTimeCode=false would set the @@session.time_zone to UTC (or whatever timezone I passed in as an argument to serverTimezone) but testing this behaviour with MySQL Connector/J seems to indicate it does not.
回答1:
As I said in a comment, I was facing the same problem -- needed to find a way of doing @@session.time_zone = '+0:00' without a SQL statement, by configuring the JDBC driver instead.
Here's the solution if you're using properties (Dropwizard and maybe Spring):
sessionTimeZone: UTC
useLegacyDatetimeCode: false
Or just append it to the JDBC connection URL: ?sessionTimeZone=UTC&useLegacyDatetimeCode=false
The connector's documentation doesn't mention it at all (and that's probably why there are so many answers pointing towards 'serverTimezone' and others.
回答2:
If you want your MySQL to be configured UTC :
SET @@global.time_zone = '+00:00';
So every automatic update of datetime and everytime you connect to the database, @@session.time_zone will be set to @@global.time_zone.
Reboot and reconnection of the DB could be needed.
If you're just interested by the modification of the timezone of your session :
SET @@session.time_zone = '+00:00';
You need to do this after every connection.
来源：https://stackoverflow.com/questions/51196041/does-servertimezone-param-change-session-time-zone-in-mysql