VendorDatabaseIdProvider should not return null databaseId

[jpragma]

If there is a problem retrieving database product name, then VendorDatabaseIdProvider.getDatabaseId simply returns null. This causes " org.apache.ibatis.binding.BindingException: Parameter '_databaseId' not found" when calling a mapper that references this databaseId.

It would be probably much better throwing RuntimeException in this case.

[harawata]

There may be a reason for the current implementation, but I would look into it if you could provide a test case that replicate the BindingException.
These pages may help you create a test case.

• https://github.com/mybatis/mybatis-3/wiki/Unit-Test
• https://github.com/harawata/mybatis-issues

Thank you for the report!

[harawata]

Hello @jpragma ,

I now realize that this is a duplicate of #3296 .
It was fixed in 3.5.17.

Thank you for the report!