src/main/java/com/kamco/cd/training/dataset/service/DatasetService.java

@@ -208,6 +208,13 @@ public class DatasetService {
     Long datasetUid = null; // master id 값, 등록하면서 가져올 예정
 
     try {
+      // 같은 uid 로 등록한 파일이 있는지 확인
+      Long existsCnt =
+          datasetCoreService.findDatasetByUidExistsCnt(addReq.getFileName().replace(".zip", ""));
+      if (existsCnt > 0) {
+        return new ResponseObj(ApiResponseCode.DUPLICATE_DATA, "이미 등록된 회차 데이터 파일입니다. 확인 부탁드립니다.");
+      }
+
       // 압축 해제
       FIleChecker.unzip(addReq.getFileName(), addReq.getFilePath());
 

src/main/java/com/kamco/cd/training/postgres/core/DatasetCoreService.java

@@ -246,4 +246,8 @@ public class DatasetCoreService
   public void insertDatasetValObj(DatasetObjRegDto objRegDto) {
     datasetObjRepository.insertDatasetValObj(objRegDto);
   }
+
+  public Long findDatasetByUidExistsCnt(String uid) {
+    return datasetRepository.findDatasetByUidExistsCnt(uid);
+  }
 }

src/main/java/com/kamco/cd/training/postgres/repository/dataset/DatasetRepositoryCustom.java

@@ -24,4 +24,6 @@ public interface DatasetRepositoryCustom {
   Long insertDatasetMngData(DatasetMngRegDto mngRegDto);
 
   List<String> findDatasetUid(List<Long> datasetIds);
+
+  Long findDatasetByUidExistsCnt(String uid);
 }

src/main/java/com/kamco/cd/training/postgres/repository/dataset/DatasetRepositoryImpl.java

@@ -247,4 +247,13 @@ public class DatasetRepositoryImpl implements DatasetRepositoryCustom {
   public List<String> findDatasetUid(List<Long> datasetIds) {
     return queryFactory.select(dataset.uid).from(dataset).where(dataset.id.in(datasetIds)).fetch();
   }
+
+  @Override
+  public Long findDatasetByUidExistsCnt(String uid) {
+    return queryFactory
+        .select(dataset.id.count())
+        .from(dataset)
+        .where(dataset.uid.eq(uid))
+        .fetchOne();
+  }
 }