JPQL Like Case Insensitive

If that is only what you want and you are using Spring Data JPA you don't need to write a query.

List<User> findByNameContainingIgnoreCase(String name);

Else you need to wrap the name attribute with % before you pass it to the method (putting those directly in the query will simply not work). Or don't use a query but use a specification or the Criteria API to create the query.

You can use the concat operator:

@Query("select u from User u where lower(u.name) like lower(concat('%', ?1,'%'))")
public List<User> findByNameFree(String name);

or with a named parameter:

@Query("select u from User u where lower(u.name) like lower(concat('%', :nameToFind,'%'))")
public List<User> findByNameFree(@Param("nameToFind") String name);

(Tested with Spring Boot 1.4.3)

I am using Spring Boot 2.1.6, You can define query methods using Containing, Contains, and IsContaining as below:

List<User> findByNameContaining(String name);
List<User> findByNameContains(String name);
List<User> findByNameIsContaining(String name);

Case Insensitivity:

List<User> findByNameContainingIgnoreCase(String name);

OR you can also define as below as well:

@Query("select u from User u where lower(u.name) like lower(concat('%', :name,'%'))")
public List<User> findByName(@Param("name") String name);

The @Param annotation is important here because we're using a named parameter.

Without using concat and using TypedQuery:

  TypedQuery<Baptism> query = entityManager.createQuery("SELECT d FROM " + Baptism.class.getSimpleName()
                            + " d JOIN d.person p WHERE UPPER(p.lastName) LIKE UPPER(:ln)", Baptism.class);
                    query.setParameter("ln", "%" + ln + "%");