HQL查询以使用in子句查找数据

Question

I am trying to access the certain data using in clause but the following exception

unexpected token: Customer near line 1, column 81 [from app.com.db.DTO.SmsSourceDTO as sms where sms.description in ( Registered Customer,External DB,Birthday)]

displayed

SmsSourceDTO.java

   @Table(name = "sms_source_tbl")
    public class SmsSourceDTO implements Serializable {

        private Integer id;
        private String description;
   }

.

TestHql.java

       listOfSelectedDatabase  = {Registered Customer,External DB,Birthday};

      String hqlString = "from SmsSourceDTO as sms where sms.description in(" + listOfSelectedDatabase  +")";
        getResultSetByHQL(hqlString));

       protected List getResultSetByHQL(String hql) throws DataBaseException {
            Query query = null;

            query = getHbSession().createQuery(hql);
            session = null;
            return query.list();
       }

while debugging I got the following query => from SmsSourceDTO as sms where sms.description in ( Registered Customer,External DB,Birthday)

Can anybody help.

Answer 1

You are trying to add a parameter list to an HQL query. I recommend you to use hibernate parameter binding to do this.

So first, if you want to include a list of string values, creates it before using

List<String> listOfSelectedDatabase = Arrays.asList("Registered Customer", "External DB", "Birthday");

instead

listOfSelectedDatabase = {Registered Customer,External DB,Birthday};

Then creates a param in HQL query and provide its value as follows:

String hqlString = "from SmsSourceDTO as sms where sms.description in (:paramList)";
Query query = session.createQuery(hqlString);
query.setParameterList("paramList", listOfSelectedDatabase);

Finally, what is this session = null; for? I don't get the point of that sentence.