/// <summary>
///
/// </summary>
/// <param name="type"></param>
/// <param name="alias"></param>
/// <param name="name"></param>
public ColumnExpression(Type type, TableAlias alias, string name)
: base(DbExpressionType.Column, type)
{
this.alias = alias;
this.name = name;
}
/// <summary>
///
/// </summary>
/// <param name="nodeType"></param>
/// <param name="type"></param>
/// <param name="alias"></param>
protected AliasedExpression(DbExpressionType nodeType, Type type, TableAlias alias)
: base(nodeType, type)
{
this.alias = alias;
}
/// <summary>
///
/// </summary>
/// <param name="alias"></param>
/// <param name="name"></param>
public TableExpression(TableAlias alias, string name)
: base(DbExpressionType.Table, typeof(void), alias)
{
this.name = name;
}
/// <summary>
///
/// </summary>
/// <param name="select"></param>
/// <param name="newAlias"></param>
/// <returns></returns>
public static SelectExpression AddRedundantSelect(this SelectExpression select, TableAlias newAlias)
{
var newColumns = select.Columns.Select(d => new ColumnDeclaration(d.Name, new ColumnExpression(d.Expression.Type, newAlias, d.Name)));
var newFrom = new SelectExpression(newAlias, select.Columns, select.From, select.Where, select.OrderBy, select.GroupBy, select.IsDistinct, select.Skip, select.Take);
return(new SelectExpression(select.Alias, newColumns, newFrom, null, null, null, false, null, null));
}
