Fetch List Using DTO projections using a Constructor Expression and JPQL

Question

Perform a search on DisabScreenRequest and fetch its child details also. Using DTO projections using a Constructor Expression and JPQL.

The parent entity with a child

Answer 1

AFAIK, you can't use constructor expression which take a Collection.

See the JPA 2.2 Spec, section 4.14 BNF, read about the constructor expression:

constructor_expression ::=
    NEW constructor_name ( constructor_item {, constructor_item}* )
constructor_item ::=
    single_valued_path_expression |
    scalar_expression |
    aggregate_expression |
    identification_variable