JPA Entity attribute names missing in generated JSON

Question

I am using JPA and and Jackson is used for generating JSON

Emp.java

@Entity
@NamedQuery(name = \"Emp.findAll\", 
           query = \"select o.empNo, o.         


        

Answer 1

The difference is that in the query select o.empNo, o.empName from Emp o you select specific entity fields and the every result row is an Object[]. Thus that array of the specified properties.

The second query select o from Emp o selects the entire entity with all its fields, and what you see is the JSON-marashalled entity.