5

我正在尝试使用休眠 3.3.2.GA 执行 sql 本机查询。

我有以下查询。

session.createSQLQuery("SELECT {dept1.*}, {dept2.*} FROM Dept d1, Dept d2 WHERE d1.deptId = d2.deptId").
   addEntity("dept1",com.test.pojo.Dept.class).
   addEntity("dept2",com.test.pojo.Dept.class).
   list();

Dept 类的映射文件是

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
                                   "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.test.pojo.Dept">
  <id column="deptId" name="deptId" type="long">
   <generator class="native"/>
  </id>
  <version name="version" access="field" column="version"></version>
  <property  name="deptName" type="string" column="deptName"/>

  <set name="emps" cascade="all" inverse="true">
     <key column="deptId"></key>
     <one-to-many class="com.test.pojo.Emp"/>
  </set>
</class>
</hibernate-mapping>

但为什么我得到以下错误?它正在将我的查询转换为

选择dept1.**deptId 作为 deptId1_0_,**dept1.**version 作为 version1_0_,**dept1.**deptName 作为 deptName1_0_,**dept2.**deptId 作为 deptId1_1_,**dept2.**version 作为 version1_1_,* *dept2.**deptName 为 deptName1_1_ **来自 Dept d1,Dept d2 WHERE d1.deptId = d2.deptId。

休眠:选择 dept1.deptId 作为 deptId1_0_,dept1.version 作为 version1_0_,dept1.deptName 作为 deptName1_0_,dept2.deptId 作为 deptId1_1_,dept2.version 作为 version1_1_,dept2.deptName 作为 deptName1_1_ FROM Dept d1,Dept d2 WHERE d1.deptId = d2 .deptId 20:43:41,109 WARN JDBCExceptionReporter:100 - SQL 错误:904,SQLState: 42000 20:43:41,109 错误 JDBCExceptionReporter:101 - ORA-00904:“DEPT2”。“DEPTNAME”:无效标识符

Exception in thread "main" org.hibernate.exception.SQLGrammarException: could not execute query
    at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:90)
    at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
    at org.hibernate.loader.Loader.doList(Loader.java:2235)
    at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2129)
    at org.hibernate.loader.Loader.list(Loader.java:2124)
    at org.hibernate.loader.custom.CustomLoader.list(CustomLoader.java:312)
    at org.hibernate.impl.SessionImpl.listCustomQuery(SessionImpl.java:1723)
    at org.hibernate.impl.AbstractSessionImpl.list(AbstractSessionImpl.java:165)
    at org.hibernate.impl.SQLQueryImpl.list(SQLQueryImpl.java:175)
    at com.test.test.Test1.main(Test1.java:96)
Caused by: java.sql.SQLException: ORA-00904: "DEPT2"."DEPTNAME": invalid identifier
    at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
    at oracle.jdbc.ttc7.TTIoer.processError(TTIoer.java:289)
    at oracle.jdbc.ttc7.Oall7.receive(Oall7.java:590)
    at oracle.jdbc.ttc7.TTC7Protocol.doOall7(TTC7Protocol.java:1973)
    at oracle.jdbc.ttc7.TTC7Protocol.parseExecuteDescribe(TTC7Protocol.java:850)
    at oracle.jdbc.driver.OracleStatement.doExecuteQuery(OracleStatement.java:2599)
    at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:2963)
    at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:658)
    at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:584)
    at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:208)
    at org.hibernate.loader.Loader.getResultSet(Loader.java:1812)
    at org.hibernate.loader.Loader.doQuery(Loader.java:697)
    at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259)
    at org.hibernate.loader.Loader.doList(Loader.java:2232)
    ... 7 more
4

2 回答 2

3

它应该是

 session.createSQLQuery(
     "SELECT {dept1.*}, {dept2.*} FROM Dept dept1, Dept dept2 WHERE dept1.deptId = dept2.deptId")
     .addEntity("dept1",com.test.pojo.Dept.class)
     .addEntity("dept2",com.test.pojo.Dept.class)
     .list();

如果您被文档(18.1.4. Returning multiple entities)误导了,那里有一个错误(HHH-2976),请随意投票。

于 2010-12-28T19:42:05.973 回答
1

使用 ORA-XXX 代码尝试 Google。来自http://www.dba-oracle.com/t_ora_00904_string_invalid_identifier.htm

问:我正在运行一条 SQL 语句,但我得到一个 SQL*Plus 错误 ORA-00904 无效标识符。

回答:当 ORA-00904 发生时,您必须输入一个有效的列名,因为它要么丢失要么输入无效。当您在 select 语句中引用无效别名时,最常见的“无效标识符”会发生。Oracle 文档在 ORA-00904 错误中记录了这一点:

于 2010-12-28T19:19:32.550 回答