perf(export): export generates unnecessary files content (#26765)

tests/unit_tests/datasets/commands/export_test.py

@@ -88,9 +88,22 @@ def test_export(session: Session) -> None:
         extra=json.dumps({"warning_markdown": "*WARNING*"}),
     )
 
-    export = list(
-        ExportDatasetsCommand._export(sqla_table)  # pylint: disable=protected-access
+    export = [
+        (file[0], file[1]())
+        for file in list(
+            ExportDatasetsCommand._export(
+                sqla_table
+            )  # pylint: disable=protected-access
+        )
+    ]
+
+    payload = sqla_table.export_to_dict(
+        recursive=True,
+        include_parent_ref=False,
+        include_defaults=True,
+        export_uuids=True,
     )
+
     assert export == [
         (
             "datasets/my_database/my_table.yaml",
@@ -114,7 +127,7 @@ extra:
   warning_markdown: '*WARNING*'
 normalize_columns: false
 always_filter_main_dttm: false
-uuid: null
+uuid: {payload['uuid']}
 metrics:
 - metric_name: cnt
   verbose_name: null
@@ -129,12 +142,12 @@ metrics:
 columns:
 - column_name: profit
   verbose_name: null
-  is_dttm: null
-  is_active: null
+  is_dttm: false
+  is_active: true
   type: INTEGER
   advanced_data_type: null
-  groupby: null
-  filterable: null
+  groupby: true
+  filterable: true
   expression: revenue-expenses
   description: null
   python_date_format: null
@@ -143,47 +156,47 @@ columns:
 - column_name: ds
   verbose_name: null
   is_dttm: 1
-  is_active: null
+  is_active: true
   type: TIMESTAMP
   advanced_data_type: null
-  groupby: null
-  filterable: null
+  groupby: true
+  filterable: true
   expression: null
   description: null
   python_date_format: null
   extra: null
 - column_name: user_id
   verbose_name: null
-  is_dttm: null
-  is_active: null
+  is_dttm: false
+  is_active: true
   type: INTEGER
   advanced_data_type: null
-  groupby: null
-  filterable: null
+  groupby: true
+  filterable: true
   expression: null
   description: null
   python_date_format: null
   extra: null
 - column_name: expenses
   verbose_name: null
-  is_dttm: null
-  is_active: null
+  is_dttm: false
+  is_active: true
   type: INTEGER
   advanced_data_type: null
-  groupby: null
-  filterable: null
+  groupby: true
+  filterable: true
   expression: null
   description: null
   python_date_format: null
   extra: null
 - column_name: revenue
   verbose_name: null
-  is_dttm: null
-  is_active: null
+  is_dttm: false
+  is_active: true
   type: INTEGER
   advanced_data_type: null
-  groupby: null
-  filterable: null
+  groupby: true
+  filterable: true
   expression: null
   description: null
   python_date_format: null