public void SelectParse1()
        {
            XElement el     = XElement.Parse(@"<f>select [System.Id], [Phoenix.DueDate], [Phoenix.MagicDueDate], [System.WorkItemType], [System.State], [System.Title], [System.IterationPath] 
from WorkItems 
where ([System.State] = 'New' 
    or [System.State] = 'Active') 
    and ([System.AssignedTo] = 'Ventsislav Mladenov' or [System.TeamProject] = @project) 
order by [System.Id]</f>");
            var      parser = new LexalParser(el.Value);
            var      nodes  = parser.ProcessSelect();

            Console.WriteLine(nodes);
            Assert.Equal("[System.Id], [Phoenix.DueDate], [Phoenix.MagicDueDate], [System.WorkItemType], [System.State], [System.Title], [System.IterationPath]", nodes.ToString());
        }
        public List <string> GetSelectColumns()
        {
            var parser = new LexalParser(this.QueryText);

            return(parser.ProcessSelect().Select(x => x.ColumnName).ToList());
        }