1, the data table is not set the primary key
Arranged main keys like
2, in mybits configuration documentation set some of the properties is false
Check in mybatis configuration documentation
enableSelectByPrimaryKey="true"
enableUpdateByPrimaryKey="true"
enableDeleteByPrimaryKey="true"
The property is set to false, if these properties are set to true can be, if not set these properties, its default value is true, then do not ignore it
3, drive version too