업로드 시 같은 uid로 업로드하지 못하게 조건 추가

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();
+  }
 }