GORM 执行更新查询

【问题标题】：GORM executeUpdate queryGORM 执行更新查询
【发布时间】：2018-02-04 04:00:26
【问题描述】：

如何为以下 SQL 查询编写 GORM executeUpdate 查询

UPDATE student_marks sm SET
    sm.totalMarks = sm.theoryMarks + sm.homeAssignmentMarks
WHERE
    sm.homeAssignmentMarks IS NOT NULL
        AND sm.theoryMarks IS NOT NULL
            AND sm.theoryMarks = sm.totalMarks
                AND sm.examHeldIn = 6;

这里的 theoryMarks 和 homeAssignmentMarks 是字符串。

【问题讨论】：

标签： grails hql grails-orm

【解决方案1】：

def map = [:]
map.examHeldInt = 6

StudentMarks.executeUpdate("""
    UPDATE StudentMarks sm SET
        sm.totalMarks = CAST(sm.theoryMarks AS int) + CAST(sm.homeAssignmentMarks AS int)
    WHERE
        sm.homeAssignmentMarks IS NOT NULL
            AND sm.theoryMarks IS NOT NULL
                AND sm.theoryMarks = sm.totalMarks
                    AND sm.examHeldIn = :examHeldIn""", map)

像上面这样你需要将字符串大小写为 int 以便能够添加它们查找强制转换和连接

【讨论】：