[SCN REFACTOR] replace flash back snapshot and remove read snapshot session

src/sql/engine/ob_physical_plan.cpp

@@ -115,6 +115,8 @@ ObPhysicalPlan::ObPhysicalPlan(MemoryContext &mem_context /* = CURRENT_CONTEXT *
     contain_pl_udf_or_trigger_(false),
     ddl_schema_version_(0),
     ddl_table_id_(0),
+    ddl_execution_id_(0),
+    ddl_task_id_(0),
     is_packed_(false),
     has_instead_of_trigger_(false)
 {
@@ -738,7 +740,9 @@ OB_SERIALIZE_MEMBER(ObPhysicalPlan,
                     contain_pl_udf_or_trigger_,
                     is_packed_,
                     has_instead_of_trigger_,
-                    is_plain_insert_);
+                    is_plain_insert_,
+                    ddl_execution_id_,
+                    ddl_task_id_);
 
 int ObPhysicalPlan::set_table_locations(const ObTablePartitionInfoArray &infos,
                                         ObSchemaGetterGuard &schema_guard)