Question

同样的查询在mysql workbrench中运行正常，但是当我在程序中运行它没有结果甚至没有错误。真的不知道如何解决这个问题。

我正在使用hibernate 5.0.0和mysql连接器5.0.5

Dao看起来像那样：

Session session = null;
    Transaction tx = null;

    try {
        session = HibernateAnnotationUtil.getSessionFactory().openSession();
        tx = session.beginTransaction();
        String hql = "UPDATE cms_asset SET `value` = CASE application_structure_id "
                + "WHEN (select id from application_structure where `name` = ? and cms_id = ?) THEN ? "
                + "WHEN (select id from application_structure where `name` = ? and cms_id = ?) THEN ? "
                + "WHEN (select id from application_structure where `name` = ? and cms_id = ?) THEN ? "
                + "WHEN (select id from application_structure where `name` = ? and cms_id = ?) THEN ? "
                + "WHEN (select id from application_structure where `name` = ? and cms_id = ?) THEN ? "
                + "WHEN (select id from application_structure where `name` = ? and cms_id = ?) THEN ? "
                + "WHEN (select id from application_structure where `name` = ? and cms_id = ?) THEN ? "
                + "WHEN (select id from application_structure where `name` = ? and cms_id = ?) THEN ? "
                + "WHEN (select id from application_structure where `name` = ? and cms_id = ?) THEN ? "
                + "ELSE `value` END WHERE application_structure_id > 0;";
        Query query = session.createSQLQuery(hql);
        query.setParameter(0, "asd");
        ...
        query.setParameter(26, "asd2");
        Integer result = query.executeUpdate();
        tx.commit();
        if(result > 0){
            return true;
        }else {
            return false;
        }   

    } catch (Exception e) {
        try {
            tx.rollback();
        } catch (RuntimeException rbe) {
            rbe.printStackTrace();
        }
        e.printStackTrace();
        return null;
    } finally {
        if (session != null) {
            session.close();
        }
    }

Answer 1

据我记得你要使用SQLQuery接口来处理Native SQL Updates。 E.g。

    SQLQuery query = session.createSQLQuery(hql);
    query.setParameter(0, "asd");
    ...
    query.setParameter(26, "asd2");
    Integer result = query.executeUpdate();

否则您可能希望使用Custom SQL Annotations。但是HQL是最好的选择。

Answer 2

问题的解决方法是将引擎表从InnoDB更改为MyISAM，然后更新工作正常。

更新查询，工作正常，但不是我dao类

2 个答案: