Question

I use this query on mysql (every record within tbl1 has a list of records within tbl2):

select tbl1.id, tbl2.id from parenttable1 tbl1 join childtable2 tbl2 on tbl1.id = tbl2.tbl1Id

and the result is true but when I use this as a Native Query (javax.persistence.EntityManager#createNativeQuery()) within my application the tbl2.id is repeated. what is the problem?

the result is something like this:

id   id
11   1
11   1
22   3
33   4
44   5
44   5
44   5

but i expect:

id   id
11   1
11   2
22   3
33   4
44   5
44   6
44   7

my code is something like this:


List<MyDTO> foundList = (List<MyDTO>) entityManager.createNativeQuery("the query above",
MyDTO.class).getResultList();


Answer 1

Thanks a lot for you inspirations. The problem was that @Id existed on id field of parent table instead of id field of child table (within DTO)!