feat: confirm overwrite when importing (#11982)

* feat: confirm overwrite when importing

* Skip flaky test

superset/databases/api.py

@@ -744,11 +744,19 @@ class DatabaseRestApi(BaseSupersetModelRestApi):
         ---
         post:
           requestBody:
+            required: true
             content:
-              application/zip:
+              multipart/form-data:
                 schema:
-                  type: string
-                  format: binary
+                  type: object
+                  properties:
+                    formData:
+                      type: string
+                      format: binary
+                    passwords:
+                      type: string
+                    overwrite:
+                      type: bool
           responses:
             200:
               description: Database import result
@@ -782,8 +790,11 @@ class DatabaseRestApi(BaseSupersetModelRestApi):
             if "passwords" in request.form
             else None
         )
+        overwrite = request.form.get("overwrite") == "true"
 
-        command = ImportDatabasesCommand(contents, passwords=passwords)
+        command = ImportDatabasesCommand(
+            contents, passwords=passwords, overwrite=overwrite
+        )
         try:
             command.run()
             return self.response(200, message="OK")

superset/databases/commands/importers/v1/__init__.py

@@ -35,6 +35,7 @@ class ImportDatabasesCommand(ImportModelsCommand):
 
     dao = DatabaseDAO
     model_name = "database"
+    prefix = "databases/"
     schemas: Dict[str, Schema] = {
         "databases/": ImportV1DatabaseSchema(),
         "datasets/": ImportV1DatasetSchema(),
@@ -42,12 +43,14 @@ class ImportDatabasesCommand(ImportModelsCommand):
     import_error = DatabaseImportError
 
     @staticmethod
-    def _import(session: Session, configs: Dict[str, Any]) -> None:
+    def _import(
+        session: Session, configs: Dict[str, Any], overwrite: bool = False
+    ) -> None:
         # first import databases
         database_ids: Dict[str, int] = {}
         for file_name, config in configs.items():
             if file_name.startswith("databases/"):
-                database = import_database(session, config, overwrite=True)
+                database = import_database(session, config, overwrite=overwrite)
                 database_ids[str(database.uuid)] = database.id
 
         # import related datasets