Function to check whether DS is exists or not in QUERY D365FO

QueryBuildDataSource findFirstDsForTable(Query _q, TableId _tableId)

{

    QueryBuildDataSource ds;

    int i;

    for (i = 1; i <= _q.dataSourceCount(); i++)

    {

        ds = _q.dataSourceNo(i);

        if (ds.table() == _tableId)

        {

            return ds;

        }

    }

    return null;

}