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From "Daniele Pirola (JIRA)" <j...@apache.org>
Subject [jira] [Created] (OPENJPA-2488) select with fixed column doesn't run
Date Fri, 11 Apr 2014 12:44:14 GMT
Daniele Pirola created OPENJPA-2488:
---------------------------------------

             Summary: select with fixed column doesn't run
                 Key: OPENJPA-2488
                 URL: https://issues.apache.org/jira/browse/OPENJPA-2488
             Project: OpenJPA
          Issue Type: Bug
    Affects Versions: 2.2.2
            Reporter: Daniele Pirola


Suppose to have a mapped Entity named Dual and want to retrieve the sysdate from the db.
If you try this code:

Timestamp ts;

CriteriaBuilder builder = entityManager.getCriteriaBuilder();
CriteriaQuery<Timestamp> criteria = builder.createQuery(Timestamp.class);
criteria.select(builder.currentTimestamp());
criteria.from(Dual.class);
ts =entityManager.createQuery(criteria).setMaxResults(1).getSingleResult();

openjpa build a query like this:
SELECT CURRENT_TIMESTAMP FROM  WHERE ROWNUM <= ?

without the table Dual specified.
This is the Dual class but the error always happens with other real table:

@Entity
@Table(name = "DUAL")
@Access(AccessType.FIELD)
public class Dual implements Serializable {
    @Id
    @Column(name = "DATE_VALUE")
    @Temporal(TemporalType.TIMESTAMP)
    private Date date;

    public Date getDate() {
        return date;
    }

    public void setDate(Date date) {
        this.date = date;
    }
}




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