我收到错误“无效列名”

Question

<?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.vijay.Transfee" table="TRXN_FEE_TABLE"> 
<meta attribute="class-description"> 
This class contains the course details. 
</meta> 
<id name="Tcode" type="string" column="TRXN_FEE_CODE" > 
    </id> 
<property name="Icode" type="string" column ="INSTCODE" /> 
<property name="Pcode" type="string" column ="PRODUCT_CODE" /> 
<property name="Tcode1" type="string" column ="TRANSACTION_CODE" /> 
<property name="rebate_code1" type="string" column="REBATE_CODE"/> 
</class> 
<sql-query name="F_SP" callable="true"> 
    <return alias="fee" class="com.vijay.Transfee"> 
     <return-property name="rebate_code1" column="REBATE_CODE"/> 
    </return> 
    { call Feeproc1(?) } 
</sql-query> 
</hibernate-mapping> 

---

package com.vijay; 
import org.hibernate.Query; 
import org.hibernate.Session; 
import org.hibernate.SessionFactory; 
import org.hibernate.Transaction; 
import org.hibernate.cfg.Configuration; 

import java.util.*; 

public class A { 

    public static void main(String[] args){ 

     Configuration config = new Configuration(); 
     SessionFactory factory = config.configure().buildSessionFactory(); 
     System.out.println(">>>>>>>>1"); 
     Session session = factory.openSession(); 
     Transaction tx = session.beginTransaction(); 
     Query query = (Query)session.getNamedQuery("F_SP"); 
     System.out.println(">>>>>>>>2"); 
     List result = query.list(); 
     System.out.println(query.list()); 
     Iterator it=result.iterator(); 
     while(it.hasNext()) 
     { 
      Object[] sublist1 = (Object[])it.next(); 
      System.out.println(">>>>>>>>3"); 
      String Trx = (String)sublist1[0]; 
      System.out.println(">>>>>>>>4"); 
      System.out.println(Trx); 
     } 
     System.out.println(">>>>>>>>5"); 
     System.out.println(result); 
} 
} 

我调用存储过程，只是打印一个我打电话，但它显示了以下错误

  
    Exception in thread "main" org.hibernate.exception.GenericJDBCException: could not execute query 
     at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:140) 
     at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:128) 
     at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66) 
     at org.hibernate.loader.Loader.doList(Loader.java:2536) 
     at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2276) 
     at org.hibernate.loader.Loader.list(Loader.java:2271) 
     at org.hibernate.loader.custom.CustomLoader.list(CustomLoader.java:316) 
     at org.hibernate.impl.SessionImpl.listCustomQuery(SessionImpl.java:1842) 
     at org.hibernate.impl.AbstractSessionImpl.list(AbstractSessionImpl.java:165) 
     at org.hibernate.impl.SQLQueryImpl.list(SQLQueryImpl.java:157) 
     at com.vijay.A.main(A.java:24) 
    Caused by: java.sql.SQLException: Invalid column name 
     at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:113) 
     at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:147) 
     at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:209) 
     at oracle.jdbc.driver.OracleStatement.getColumnIndex(OracleStatement.java:3325) 
     at oracle.jdbc.driver.OracleResultSetImpl.findColumn(OracleResultSetImpl.java:1926) 
     at oracle.jdbc.driver.OracleResultSet.getString(OracleResultSet.java:1515) 
     at org.hibernate.type.descriptor.sql.VarcharTypeDescriptor$2.doExtract(VarcharTypeDescriptor.java:61) 
     at org.hibernate.type.descriptor.sql.BasicExtractor.extract(BasicExtractor.java:64) 
     at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:254) 
     at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:250) 
     at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:230) 
     at org.hibernate.type.AbstractStandardBasicType.hydrate(AbstractStandardBasicType.java:331) 
     at org.hibernate.loader.Loader.extractKeysFromResultSet(Loader.java:668) 
     at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:606) 
     at org.hibernate.loader.Loader.doQuery(Loader.java:829) 
     at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:274) 
     at org.hibernate.loader.Loader.doList(Loader.java:2533) 
     ... 7 more 

CREATE OR REPLACE PROCEDURE LYCAMONEY.Feeproc1(p_cursor OUT sys_refcursor) 
as rebate_code1 varchar2(20); 
begin 

    rebate_code1 := null; 
    open p_cursor for 
    select REBATE_CODE into rebate_code1 from TRXN_FEE_TABLE; 

dbms_output.put_line(rebate_code1); 

end; 
/

任何人都可以帮助我解决这个问题......并且也发布正确的方法如果

Answer 1

那么，你的存储过程对于初学者来说是错误的。它应该是：

open p_cursor for 
    select REBATE_CODE from TRXN_FEE_TABLE; 

这是错误的，因为ref cursor是一个指向查询的指针。它实际上并不提取任何数据。

但我不认为这是给你的错误。