Go-gorm中的MS SQL日期时间表示

Title says it all. I'm using gorm (golang orm) to connect to a MS SQL db.

time.Time gets me datetime2 which is a different dataType. Any suggestions?

Structure:

type (
    ACDepartements struct {
        DEPTID              int         `gorm:"column:DEPTID;primary_key;not null;"`
        DEPTNAME            string      `gorm:"column:DEPTNAME;size:30;"`
        SUPDEPTID           int         `gorm:"column:SUPDEPTID;not null;"`
        InheritParentSch    int16       `gorm:"column:InheritParentSch;size:5;"`
        InheritDeptSch      int16       `gorm:"column:InheritDeptSch;"`
        InheritDeptSchClass int16       `gorm:"column:InheritDeptSchClass;"`
        AutoSchPlan         int16       `gorm:"column:AutoSchPlan;"`
        InLate              int16       `gorm:"column:InLate;"`
        OutEarly            int16       `gorm:"column:OutEarly;"`
        InheritDeptRule     int16       `gorm:"column:InheritDeptRule;"`
        MinAutoSchInterval  int         `gorm:"column:MinAutoSchInterval;"`
        RegisterOT          int16       `gorm:"column:RegisterOT;"`
        DefaultSchId        int         `gorm:"column:DefaultSchId;not null;"`
        ATT                 int16       `gorm:"column:ATT;"`
        Holiday             int16       `gorm:"column:Holiday;"`
        OverTime            int16       `gorm:"column:OverTime;"`
        ChangeOperator      string      `gorm:"size:50;"`
        ChangeTime          time.Time
        CreateOperator      string      `gorm:"size:50;"`
        CreateTime          time.Time
        DeleteOperator      string      `gorm:"size:50;"`
        DeleteTime          time.Time
        Status              int     
        Code                string      `gorm:"size:50;"`
        Type                string      `gorm:"size:50;"`
        Invalidate          time.Time
    }
)

Connection:

func buildAcDB() *gorm.DB {
    connectionString  := os.Getenv("MS_SQL")

    acDB, err := gorm.Open("mssql", connectionString)

    if err != nil {
        panic("Failed to create connection pool. Error: " + err.Error())
    }
    gorm.DefaultCallback.Create().Remove("mssql:set_identity_insert")

    return acDB
}

Server:

func Start(db *gorm.DB, acDB *gorm.DB) {

Other stuff......

defer acDB.Close()

acDB.AutoMigrate(microlab.ACDepartements{})

}

Problem:

If I check the data structure of my created table, time variables have datetime2 instead of datetime as I want. Also int16 are int instead of smallint but I guess that doesn't matter that much.