PARAM_ADD
db_param_add_set(expr, param, key, value, PARAM_ADD);
select_return_states_hook(PARAM_ADD, &db_param_add);
select_return_states_hook(PARAM_ADD, &db_param_add);
param_has_filter_data(sm) ? PARAM_ADD : PARAM_SET,
param_has_filter_data(sm) ? PARAM_ADD : PARAM_SET,
select_return_states_hook(PARAM_ADD, &db_param_add);