spring data jpa : native query

spring-data-jpa/src/main/java/com/example/springdatajpa/repository/MemberProjection.java

@@ -0,0 +1,8 @@
+package com.example.springdatajpa.repository;
+
+public interface MemberProjection {
+
+    Long getId();
+    String getUsername();
+    String getTeamName();
+}

spring-data-jpa/src/main/java/com/example/springdatajpa/repository/MemberRepository.java

@@ -72,4 +72,12 @@ public interface MemberRepository extends JpaRepository<Member, Long>, MemberRep
 //    List<UsernameOnlyDto> findProjectionsByUsername(@Param("username") String username);
     <T> List<T> findProjectionsByUsername(@Param("username") String username, Class<T> type);
 
+    @Query(value = "select * from member where username = ?", nativeQuery = true)
+    Member findByNativeQuery(String username);
+
+    @Query(value = "select m.member_id as id, m.username, t.name as teamName " +
+            "from member m left join team t",
+            countQuery = "select count(*) from member",
+            nativeQuery = true)
+    Page<MemberProjection> findByNativeProjection(Pageable pageable);
 }

spring-data-jpa/src/test/java/com/example/springdatajpa/repository/MemberRepositoryTest.java

@@ -383,5 +383,33 @@ public class MemberRepositoryTest {
             System.out.println("nestedClosedProjections.getTeam().getName() = " + nestedClosedProjection.getTeam().getName());
         }
     }
+
+    @Test
+    void nativeQuery() {
+        // given
+        Team teamA = new Team("teamA");
+        em.persist(teamA);
+
+        Member member1 = new Member("member1", 0, teamA);
+        Member member2 = new Member("member2", 0, teamA);
+        em.persist(member1);
+        em.persist(member2);
+
+        em.flush();
+        em.clear();
+
+        // when
+        Member result = memberRepository.findByNativeQuery("member1");
+        System.out.println("result = " + result);
+
+        Page<MemberProjection> results = memberRepository.findByNativeProjection(PageRequest.of(0, 10));
+        List<MemberProjection> content = results.getContent();
+        for (MemberProjection memberProjection : content) {
+            System.out.println("memberProjection.getUsername() = " + memberProjection.getUsername());
+            System.out.println("memberProjection.getTeamName() = " + memberProjection.getTeamName());
+        }
+    }
+    
+    
 }