使用 mysql-connector-java jdbc 驱动程序 8.0.18 为 MySQL 8 服务器获取时间戳列的错误值

Question

We have migrated our application from MySQL 5.1.6 to MySQL 8.0.16

While retrieving timestamp column from MySQL 8 server using mysql-connector-java jdbc driver (version 8.0.18, 8.0.19), we are getting incorrect value for the date value which is in daylight saving time (DST).

Both our server hosting java application & MySQL database are in EST.

Here, we have a column created_date having type datetime. It has value '2020-03-17 23:01:54' for a specific row. While retrieving same data through JDBC as:

Timestamp timestamp = resultSet.getTimestamp("created_date"); 

we are getting value as 2020-03-18 00:01:54.0 ie DST is getting applied.

There is a known bug in MySQL: https://dev.mysql.com/doc/connector-j/8.0/en/connector-j-usagenotes-known-issues-limitations.html

It suggest to use add additional parameter in jdbc url serverTimezone=UTC. But we can't use UTC because we want to use deployment specific timezone in our application/database.

Note: We were not facing this issue with MySQL 5.1.

Additional update: While inserting data into database, If I use jdbc url with parameter serverTimezone=UTC, then while retrieving timestamp column I get correct value.

So it seems with serverTimezone=UTC, JDBC driver is not applying DST while storing timestamp in database. So workaround suggested (ie serverTimezone=UTC) seems to be working.

But If I insert data using Load Data Local file command using JDBC url containing serverTimezone=UTC ie

PreparedStatement stmt = connection.prepareStatement("LOAD DATA LOCAL INFILE.....")

it seems serverTimezone=UTC flag is getting ignored & data is getting stored with DST applied timestamp value. So while retrieving timestamp, we are getting incorrect value.

Appreciate any suggestions.

Answer 1

我遇到了同样的问题，并通过安装新版本的 Connector/J 8 驱动程序（8.0.20）解决了这个问题： https ://dev.mysql.com/doc/relnotes/connector-j/8.0/en/news- 8-0-20.html