更新在MySQL工作台中工作但不在Java代码中的查询

时间:2018-04-11 07:45:20

标签: java mysql mysql-workbench mysql-error-1064

我创建了一个查询,我想在同一个表中使用内部查询更新某些列。并且查询在MySQL工作台中工作正常,但如果我在java中使用相同的查询,那么它会给我一个错误,如

expecting "set", found 'INNER'

这是我创建的查询。

UPDATE table1 t1  
INNER JOIN (SELECT MAX(time)  
            FROM table1 WHERE id = 1) t2  
  ON t1.time = t2.time 
SET t1.fromUserId=305, 
    t1.toUserId=306,
    t1.type='Positive', 
    t1.subcategoryId=508, 
    t1.isDeleted=false,
    t1.isNotify=true;

Java代码

   @Override
    public void methodName(DTOClass dtoClass) throws DatabaseException {
        logger.info("*******************In save-update ******************");
        StringBuilder saveQuery = new StringBuilder();
        try {
            saveQuery.append(" UPDATE table1 t1    INNER JOIN (SELECT MAX(time)  FROM table1 ");
            saveQuery.append(" WHERE id = :addedBy) t2  ON t1.time = t2.time ");
            saveQuery.append(" SET t1.fromUserId=:fromUserId, t1.toUserId=:toUserId, t1.type=:type, ");
            saveQuery.append( " t1.subcategoryId=:subcategoryId, t1.isDeleted=false, t1.isNotify=:isNotify ");
            logger.info(saveQuery.toString());
            Query query = getCurrentSession().createQuery(saveQuery.toString());
            query.setParameter("addedBy", dtoClass.getAddedBy());
            query.setParameter("fromUserId", dtoClass.getFromUserId());
            query.setParameter("toUserId", dtoClass.getToUserId());
            query.setParameter("type", dtoClass.getType());
            query.setParameter("subcategoryId", dtoClass.getSubcategoryId());
            query.setParameter("isNotify", dtoClass.getIsNotify());

            query.executeUpdate();

        } catch (Exception exception) {
            logger.error(exception.getMessage(), exception);
            throw new DatabaseException(ResourceManager.getProperty(EXCEPTION_DAO_USER));

        }

    }

有人可以帮忙。 提前谢谢!

2 个答案:

答案 0 :(得分:1)

从你的代码getCurrentSession().createQuery(saveQuery.toString());我猜你正在使用一些JPA实现(spring或者什么?加入更新在JPQL中不可用(https://docs.oracle.com/javaee/6/tutorial/doc/bnbtl.html#bnbud

因此,您可以尝试将其作为本机mysql查询发送。我不确定这样做的确切方法是什么,因为我现在没有这样的项目,但我相信它是这样的: getCurrentSession().createNativeQuery(saveQuery.toString()); 然后它应该工作,但它有点打败使用JPA的目的:)

所以我猜你应该像上面提到的那样修改查询:

update table1 set fromUserId=305, toUserId=306 where time = (SELECT MAX(time)  FROM table1 WHERE id = 1);

答案 1 :(得分:0)

你可以试试这个:

update A
set A.fromUserId=305, 
    A.toUserId=306,
    A.type='Positive', 
    A.subcategoryId=508, 
    A.isDeleted=false,
    A.isNotify=true
from table1  A
inner join (SELECT MAX(time) as bTime  FROM table1 WHERE id = 1) B
on (A.time = (B.bTime))