Adding a DISTINCT clause so we only have users once

src/main/java/org/springframework/samples/petclinic/repository/jpa/JpaOwnerRepositoryImpl.java

@@ -45,7 +45,7 @@ public class JpaOwnerRepositoryImpl implements OwnerRepository {
     public Collection<Owner> findByLastName(String lastName) {
         // using 'join fetch' because a single query should load both owners and pets
         // using 'left join fetch' because it might happen that an owner does not have pets yet
-        Query query = this.em.createQuery("SELECT owner FROM Owner owner left join fetch owner.pets WHERE owner.lastName LIKE :lastName");
+        Query query = this.em.createQuery("SELECT DISTINCT owner FROM Owner owner left join fetch owner.pets WHERE owner.lastName LIKE :lastName");
         query.setParameter("lastName", lastName + "%");
         return query.getResultList();
     }

src/main/java/org/springframework/samples/petclinic/repository/springdatajpa/JpaOwnerRepositoryImpl.java

@@ -43,7 +43,7 @@ public class JpaOwnerRepositoryImpl implements OwnerRepository {
     public Collection<Owner> findByLastName(String lastName) {
         // using 'join fetch' because a single query should load both owners and pets
         // using 'left join fetch' because it might happen that an owner does not have pets yet
-        Query query = this.em.createQuery("SELECT owner FROM Owner owner left join fetch owner.pets WHERE owner.lastName LIKE :lastName");
+        Query query = this.em.createQuery("SELECT DISTINCT owner FROM Owner owner left join fetch owner.pets WHERE owner.lastName LIKE :lastName");
         query.setParameter("lastName", lastName + "%");
         return query.getResultList();
     }