How can I add columns dynamically to a Spring Data JPA @Query

Question

Consider the following method on a Spring Data JPA interface:

@Query(\"select distinct :columnName from Item i\")
List findByName(@Param(\"columnName         


        

Answer 1

You can't. You'll have to implement such a method by yourself. And you won't be able to use parameters: you'll have to use String concatenation or the criteria API. What you'll pass won't be a column name but a field/property name. And it won't return a List, since you only select one field.