Merge pull request #161 from potenup-dekk/DK-412

[PERF] 통합 덱 조회 쿼리 성능 최적화 및 실행 계획 개선(#DK-412)

Author: SungRyulCho

src/main/java/com/dekk/deck/infrastructure/jpa/DeckJpaRepository.java

@@ -11,23 +11,20 @@
 public interface DeckJpaRepository extends JpaRepository<Deck, Long> {
 
     @Query("SELECT d FROM Deck d JOIN DeckMember dm ON d.id = dm.deckId "
-            + "WHERE dm.userId = :userId AND d.deckType = :deckType "
-            + "AND dm.deletedAt IS NULL AND d.deletedAt IS NULL")
+            + "WHERE dm.userId = :userId AND d.deckType = :deckType")
     Optional<Deck> findByUserIdAndDeckType(@Param("userId") Long userId, @Param("deckType") DeckType deckType);
 
-    @Query("SELECT d FROM Deck d JOIN DeckMember dm ON d.id = dm.deckId " + "WHERE d.id = :id AND dm.userId = :userId "
-            + "AND dm.deletedAt IS NULL AND d.deletedAt IS NULL")
+    @Query("SELECT d FROM Deck d JOIN DeckMember dm ON d.id = dm.deckId " + "WHERE d.id = :id AND dm.userId = :userId")
     Optional<Deck> findByIdAndMemberUserId(@Param("id") Long id, @Param("userId") Long userId);
 
     @Query("SELECT d FROM Deck d JOIN DeckMember dm ON d.id = dm.deckId "
             + "WHERE dm.userId = :userId AND d.deckType != :deckType "
-            + "AND dm.deletedAt IS NULL AND d.deletedAt IS NULL "
             + "ORDER BY d.createdAt DESC")
     List<Deck> findByUserIdAndDeckTypeNotOrderByCreatedAtDesc(
             @Param("userId") Long userId, @Param("deckType") DeckType deckType);
 
-    @Query("SELECT d FROM Deck d JOIN DeckMember dm ON d.id = dm.deckId " + "WHERE dm.userId = :userId "
-            + "AND dm.deletedAt IS NULL AND d.deletedAt IS NULL "
+    @Query("SELECT d FROM Deck d JOIN DeckMember dm ON d.id = dm.deckId "
+            + "WHERE dm.userId = :userId "
             + "ORDER BY CASE WHEN d.deckType = :defaultType THEN 0 ELSE 1 END, d.createdAt DESC")
     List<Deck> findAllByUserIdOrderByTypeAndCreatedAtDesc(
             @Param("userId") Long userId, @Param("defaultType") DeckType defaultType);

src/main/resources/db/migration/V9__optimize_deck_indexes.sql

@@ -0,0 +1,4 @@
+DROP INDEX IF EXISTS idx_decks_user_id;
+DROP INDEX IF EXISTS idx_deck_cards_deck_id;
+DROP INDEX IF EXISTS idx_deck_members_deck_id;
+