## MyBatis version
## Database vendor and version
mysql 5.7
## Test case or example project
## Steps to reproduce
mysql db column type
my pojo type
mybatis xml config
I use the collection lable and the oftype is Long
then i find my gradeName type was changed
I set the grade type is String ,here i saw ,it was Long ,and the same as collection oftype ;
my navicat result table is
## Actual result
so error
i did not know why it was happened
if i change the collection oftype to String , It will be ok。
## Expected result
please help me