chore: Add types hints and set created_timestamp in sql registry (#3033)

* chore: Add types for some methods in the sql registry

Signed-off-by: Achal Shah <achals@gmail.com>

* created_timestamp

Signed-off-by: Achal Shah <achals@gmail.com>

Author: achals

sdk/python/feast/infra/registry_stores/sql.py

@@ -688,15 +688,16 @@ def _apply_object(
         self,
         table: Table,
         project: str,
-        id_field_name,
-        obj,
-        proto_field_name,
-        name=None,
+        id_field_name: str,
+        obj: Any,
+        proto_field_name: str,
+        name: Optional[str] = None,
     ):
         self._maybe_init_project_metadata(project)
 
         name = name or obj.name if hasattr(obj, "name") else None
         assert name, f"name needs to be provided for {obj}"
+
         with self.engine.connect() as conn:
             update_datetime = datetime.utcnow()
             update_time = int(update_datetime.timestamp())
@@ -721,9 +722,16 @@ def _apply_object(
                 )
                 conn.execute(update_stmt)
             else:
+                obj_proto = obj.to_proto()
+
+                if hasattr(obj_proto, "meta") and hasattr(
+                    obj_proto.meta, "created_timestamp"
+                ):
+                    obj_proto.meta.created_timestamp.FromDatetime(update_datetime)
+
                 values = {
                     id_field_name: name,
-                    proto_field_name: obj.to_proto().SerializeToString(),
+                    proto_field_name: obj_proto.SerializeToString(),
                     "last_updated_timestamp": update_time,
                     "project_id": project,
                 }

sdk/python/tests/unit/test_sql_registry.py

@@ -168,6 +168,9 @@ def test_apply_entity_success(sql_registry):
         and entity.tags["team"] == "matchmaking"
     )
 
+    # After the first apply, the created_timestamp should be the same as the last_update_timestamp.
+    assert entity.created_timestamp == entity.last_updated_timestamp
+
     sql_registry.delete_entity("driver_car_id", project)
     assert_project_uuid(project, project_uuid, sql_registry)
     entities = sql_registry.list_entities(project)
@@ -256,6 +259,9 @@ def test_apply_feature_view_success(sql_registry):
         and feature_view.entities[0] == "fs1_my_entity_1"
     )
 
+    # After the first apply, the created_timestamp should be the same as the last_update_timestamp.
+    assert feature_view.created_timestamp == feature_view.last_updated_timestamp
+
     sql_registry.delete_feature_view("my_feature_view_1", project)
     feature_views = sql_registry.list_feature_views(project)
     assert len(feature_views) == 0