dc.executeStatement("alter table workflow_task add constraint FK_workflow_task_asset foreign key (webasset) references identifier(id)");
dc.executeStatement("ALTER TABLE workflow_task MODIFY status varchar(36)");
dc.executeStatement("ALTER TABLE workflow_task MODIFY assigned_to varchar(36)");
dc.executeStatement("alter table workflow_task add constraint FK_workflow_assign foreign key (assigned_to) references cms_role(id)");
dc.executeStatement("alter table workflow_task add constraint FK_workflow_step foreign key (status) references workflow_step(id)");
dc.executeStatement("alter table workflow_scheme add constraint FK_wf_scheme_action foreign key (entry_action_id) references workflow_action(id)");
dc.executeStatement("ALTER TABLE workflow_history add workflow_action_id varchar(36)");
dc.executeStatement("create index wf_histroy_action_idx on workflow_history(workflow_action_id)");
dc.executeStatement("ALTER TABLE workflow_history add workflow_step_id varchar(36)");
dc.executeStatement("create index wf_histroy_step_idx on workflow_history(workflow_step_id)");