如何在 MySQL 8 的 JDBC 连接字符串中设置 SQL 模式？

Question

I recently upgraded my MySQL instance from 5.7 to 8.0. I connected to my old instance using JDBC and a connection string that looked like this:

jdbc:mysql://[host:port]/[database]/?sessionVariables=sql_mode=''

Answer 1

It seems to be a bug in MySQL Connector/J. I have raised a bug report for it:

https://bugs.mysql.com/bug.php?id=92485

Answer 2

Try this for MySQL 8.0 in your JDBC connection string:

jdbc:mysql://[host:port]/[database]/?sessionVariables=&&sql_mode=''

eg

jdbc:mysql://localhost:3306/dbName?sessionVariables=&&sql_mode=''

For MySQL 7.0 in your JDBC connection string:

jdbc:mysql://[host:port]/[database]/?sessionVariables=sql_mode=''

eg

jdbc:mysql://localhost:3306/dbName?sessionVariables=sql_mode=''

Answer 3

我认为这可能是因为 sql_mode 中没有任何内容。

Answer 4

I faced the same problem with an old project and setting sessionVariables=sql_mode=''<\/code> didn't work in my case. It was totally ignored. Finally I found this bug report<\/a> and its explanation: