org.hibernate.exception.GenericJDBCException：执行此代码时无法执行查询异常

Question

`

Hi, I am getting above Exception while executing this function.Here i am trying to fetch distinct of a particular column. Please help me solve this issue...`.Thanks in advance.

public List<Object[]> findDistinctProductBrand(){
    SQLQuery squery =null;
    try{
        Session session= sessionFactory.openSession();
        squery =(SQLQuery) session.createSQLQuery("select distinct product_brand from ecm_product").addEntity(EcmProduct.class).list();

    }catch(Exception e){
        System.out.println("Exception in ProductDaoImpl inside findDistinctproductBrand "+e);
    }
    return squery.list();
}  

Answer 1

I think you need to use Transformers in ur code . give it a Try:

String sql = "select distinct product_brand from ecm_product";
//or     String sql = "select distinct(product_brand) from ecm_product";//no difference actually
SQLQuery query = session.createSQLQuery(sql);
query.setResultTransformer(Criteria.ALIAS_TO_ENTITY_MAP);
List results = query.list();

and you may follow this

Let me know if it works.