Question

Example:

@Entity
class Table_A{
    @Id
    @generatedValue
    private long ID;

    @Column
    private String name;

    @Transient
    private String otherName;

    // getters and setters

    public long getID()
    { return ID;}
    public void setID(long ID)
    { this.ID = ID;}

     public String getName()
    { return Name;}
    public void setName(String name)
    { this.name = name;}

    public String getOtherName()
    { return otherName;}
    public void setOtherName(String otherName)
    { this.otherName = otherName;}
}

Query Example:

String sql = "SELECT Table_A.*, otherName 
FROM Table_A INNER JOIN Other_Table ON Table_A.id = Other_Table.id";

List<Table_A> = em.createNativeQuery(sql, Table_A.class).getResultList();

NOTE:

“otherName” column is a field of Other_Table.

Other_Table is not an Entity

PROBLEM:

the problem is, I can’t store the “otherName” column result to the @Transient field of the Table_A entity. Is there any way of doing this? It always returns null.

Answer 1

The problem is that you’ve used the form of createNativeQuery that expects to be able to place the result directly into your class Table_A – but of course the otherName won’t map.

If you use the other form of createNativeQuery, that uses a named @SqlResultSetMapping, you might be able to get the value of otherName into a @ColumnResult that you can use. Have a look at the example here.

I’m afraid you’ll still probably have to manually call setOtherName() at some point though 🙁