Spring data JPA and parameters that can be null

Question

My understanding is, that with Spring data JPA I cannot have a query method to fetch all rows where a column equals a given non-null method parameter and use the same method

Answer 1

In my case membershipNumber is nullable, and I have handled it this way. This will handle all the cases where table.membershipNumber is null too.

      @Query(value = "SELECT pr FROM ABCTable pr " +
            "WHERE LOWER(pr.xyz) = LOWER(:xyz) " +
            "and LOWER(pr.subscriptionReference) = LOWER(:subscriptionReference) " +
            "and pr.billId = :billId " +
            "and ((pr.membershipNumber = :membershipId) or (pr.membershipNumber = null and :membershipId = null))")
    List getSomething (@Param("xyz") String xyz,
                                                 @Param("subscriptionReference") String subscriptionReference,
                                                 @Param("billId") Integer billId,
                                                 @Param("membershipId") String membershipNumber);