Thanks. So it is possible to use both JPA & low level API.  

I tried it out , works like a charm but @ retrieval of specific object I ran 
into prob you see
in my JPA, all my Entities are by long ID. How is possible for me to access 
id using Key ?  How may I refer keys using id & vice versa?? 

        @Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;

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