public virtual IList<IExpression> GetSelectExprListWithoutAlias()
{
if (selectExprList == null || selectExprList.IsEmpty())
{
return new List<IExpression>(0);
}
IList<IExpression> list = new List<IExpression>(selectExprList.Count);
foreach (var p in selectExprList)
{
if (p != null && p.Key != null)
{
list.Add(p.Key);
}
}
return list;
}