feat: feed 조회 시 university_id, category_id, pinned, created_date 기준 복합 인덱스 추가하여 조회 성능 개선

src/main/java/com/team/buddyya/feed/repository/FeedRepository.java

@@ -4,16 +4,41 @@
 import com.team.buddyya.feed.domain.Feed;
 import com.team.buddyya.student.domain.Student;
 import com.team.buddyya.student.domain.University;
+
+import java.time.LocalDateTime;
 import java.util.List;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
 import org.springframework.stereotype.Repository;
 
 @Repository
 public interface FeedRepository extends JpaRepository<Feed, Long> {
 
-    Page<Feed> findAllByUniversityAndCategory(University university, Category category, Pageable pageable);
+    @Query("""
+        SELECT f
+        FROM Feed f
+        WHERE f.university = :university
+          AND f.category   = :category
+        ORDER BY f.pinned DESC, f.createdDate DESC
+    """)
+    Page<Feed> findFeedsByUnivAndCategory(@Param("university") University university,
+                                          @Param("category") Category category,
+                                          Pageable pageable);
+
+
+    @Query("""
+        SELECT f
+        FROM Feed f
+        WHERE f.university = :university
+          AND f.category = :category
+        ORDER BY f.likeCount DESC, f.createdDate DESC
+    """)
+    Page<Feed> findPopularFeedsByUnivAndCategory(@Param("university") University university,
+                                                 @Param("category") Category category,
+                                                 Pageable pageable);
 
     Page<Feed> findAllByStudent(Student student, Pageable pageable);
 
@@ -29,4 +54,4 @@ Page<Feed> findByLikeCountGreaterThanEqualAndUniversity(
             University university,
             Pageable pageable
     );
-}
+}

src/main/java/com/team/buddyya/feed/service/FeedService.java

@@ -107,10 +107,15 @@ Page<Feed> getFeedsByUniversityAndCategory(FeedListRequest request, Pageable pag
         Category category = categoryService.getCategory(request.category());
         Pageable customPageable = PageRequest.of(
                 pageable.getPageNumber(),
-                pageable.getPageSize(),
-                getSortBy(category)
+                pageable.getPageSize()
         );
-        return feedRepository.findAllByUniversityAndCategory(university, category, customPageable);
+        Page<Feed> feeds;
+        if (category.getName().equals("POPULAR")) {
+            feeds = feedRepository.findPopularFeedsByUnivAndCategory(university, category, customPageable);
+        } else {
+            feeds = feedRepository.findFeedsByUnivAndCategory(university, category, customPageable);
+        }
+        return feeds;
     }
 
     @Transactional(readOnly = true)

src/main/resources/db/migration/V32__Add_feed_university_category_pinned_created_index.sql

@@ -0,0 +1,2 @@
+CREATE INDEX idx_feed_uni_cat_order
+    ON feed (university_id, category_id, pinned DESC, created_date DESC);