ReadOnlyCollection <Expression> values; // either select or expressions are assigned
/// <summary>
///
/// </summary>
/// <param name="expression"></param>
/// <param name="select"></param>
public InExpression(Expression expression, SelectExpression select)
: base(DbExpressionType.In, typeof(bool), select)
{
this.expression = expression;
}
/// <summary>
///
/// </summary>
/// <param name="type"></param>
/// <param name="select"></param>
public ScalarExpression(Type type, SelectExpression select)
: base(DbExpressionType.Scalar, type, select)
{
}
/// <summary>
///
/// </summary>
/// <param name="select"></param>
public ExistsExpression(SelectExpression select)
: base(DbExpressionType.Exists, typeof(bool), select)
{
}
/// <summary>
///
/// </summary>
/// <param name="eType"></param>
/// <param name="type"></param>
/// <param name="select"></param>
protected SubqueryExpression(DbExpressionType eType, Type type, SelectExpression select)
: base(eType, type)
{
System.Diagnostics.Debug.Assert(eType == DbExpressionType.Scalar || eType == DbExpressionType.Exists || eType == DbExpressionType.In);
this.select = select;
}
/// <summary>
///
/// </summary>
/// <param name="select"></param>
/// <param name="groupBy"></param>
/// <returns></returns>
public static SelectExpression SetGroupBy(this SelectExpression select, IEnumerable <Expression> groupBy)
{
return(new SelectExpression(select.Alias, select.Columns, select.From, select.Where, select.OrderBy, groupBy, select.IsDistinct, select.Skip, select.Take));
}
/// <summary>
///
/// </summary>
/// <param name="select"></param>
/// <param name="columns"></param>
/// <returns></returns>
public static SelectExpression SetColumns(this SelectExpression select, IEnumerable <ColumnDeclaration> columns)
{
return(new SelectExpression(select.Alias, columns.OrderBy(c => c.Name), select.From, select.Where, select.OrderBy, select.GroupBy, select.IsDistinct, select.Skip, select.Take));
}
/// <summary>
///
/// </summary>
/// <param name="source"></param>
/// <param name="projector"></param>
public ProjectionExpression(SelectExpression source, Expression projector)
: this(source, projector, null)
{
}
/// <summary>
///
/// </summary>
/// <param name="select"></param>
/// <returns></returns>
protected virtual Expression VisitSelect(SelectExpression select)
{
this.Write(select.QueryText);
return(select);
}
