为什么 Hibernate 抛出无效列异常？ 我的查询在 Oracle 中运行良好，但在 Java 代码中抛出异常

Question

Constants.java

 public static  final String A=" SELECT  name as teamName,location as bookingLoc FROM table where emp_ps_id = :empPSID and rownum<2" ;

 public static  final String A=" SELECT  name as team,location as booking FROM table where emp_ps_id = :empPSID and rownum<2" ;

If I use these queries with Hibernate, first one throws an invalid column name exception and the second one produces correct result.

 public Details getDetails(final String psid) {
        final String finalQuery = Constants.A;
        return (Details) entityManager.createNativeQuery(finalQuery, Details.class)
                .setParameter("empPSID", psid)
                .getSingleResult();
    }

Answer 1

As no explicit query mapping is given, the implicit mapping is taking place and thus the aliased names and types in the query (those after as such as teamName ) needs to correspond to fields on the result class Details .

Synchronizing the aliased names and types between the query and result class will fix the problem. Note that every fields on the result class needs to be delivered by the query.