无法通过使用hibernate的存储过程获取多个Table实体

时间:2013-01-30 16:19:28

标签: java mysql hibernate stored-procedures

这是我的存储过程

Create PROCEDURE  [dbo].getUserAndEnum

AS

BEGIN

select * from user_master where id =1

select * from enum_master where id = 1

End

用hibernate编写

Session session = HibernateFactory.getSessionFactory().openSession();

Transaction tr = session.beginTransaction();

SQLQuery qr=session.createSQLQuery("getUserAndEnum");

List list = qr.list();

在列表中,我只获取用户对象..我的enum_master行,ID为1

DB

中存在ID为1的P.Senum_master行

感谢。

1 个答案:

答案 0 :(得分:4)

'在hibernate文档中使用存储过程的规则/限制'表明

“该过程必须返回结果集。请注意,由于这些服务器可以返回多个结果集和更新计数,因此Hibernate将迭代结果并将结果集的第一个结果作为其返回值。否则将被丢弃。“ (参考:http://docs.jboss.org/hibernate/orm/3.3/reference/en/html/querysql.html#sp_query

如上所述,您的案例中的第二个结果集将被忽略。

您需要使用jdbc来获取两个结果集。您可以为此单独创建类,或者,hibernate通过其会话的“doWork”和“doReturningWork”方法为您提供执行传统jdbc操作的方法......

一个简单的例子可能是:

List<Object> res = session.doReturningWork(new ReturningWork<List<Object> /*objectType returned*/>() {
            @Override
            /* or object type you need to return to process*/
            public List<Object> execute(Connection conn) throws SQLException 
            {
                CallableStatement cstmt = conn.prepareCall("CALL YOUR_PROCEDURE");
                //Result list that would return ALL rows of ALL result sets
                List<Object> result = new ArrayList<Object>();
                try
                {
                    cstmt.execute();                        

                    ResultSet rs = cstmt.getResultSet(); // First resultset
                    while (rs.next()) {//Read items/rows of first resultset
                        // .
                        // Process rows of first resultset

                        result.add(obj); // add items of resultset 1 to the returning list object
                    }

                    cstmt.getMoreResults(); // Moves to this Statement object's next result, returns true if it is a ResultSet object

                    rs = cstmt.getResultSet(); // Second resultset
                    while (rs.next()) {
                        // .
                        // Process rows of second resultset

                        result.add(obj); // add items of resultset 2 to the returning list object
                    }
                    rs.close();                           
                }
                finally
                {cstmt.close();}

                return result; // this should contain All rows or objects you need for further processing
            }
        });