/// <summary>
/// Represents a column in the select statement.
/// </summary>
/// <param name="arg">Is an aliased mapped column.</param>
public Column(OfChainer arg)
: this(arg as Chainer)
{
// set column name
if (arg != null)
{
_columnName = arg.Column.ColumnName;
}
SetArgType(arg);
}
internal ByArgument(OfChainer arg)
: base(arg)
{
if (CheckNull(Arg(() => arg, arg)))
{
Build = arg.Build;
_dbColumn = arg.Column;
_column = arg.Column.ColumnName;
_alias = arg.Column.OfAlias;
JoinType = Wall.ByType.MappedColumn;
}
SetArgType(arg);
}
internal ScalarArgument(OfChainer arg)
: this(arg as Chainer)
{
SetArgType(arg);
}
internal NonSelectColumnArgument(OfChainer arg)
: this(arg as Chainer)
{
SetArgType(arg);
}
internal FunctionArgument(OfChainer arg)
: this(arg as Chainer)
{
SetArgType(arg);
}
internal AggregateArgument(OfChainer arg)
: this(arg as Chainer)
{
SetArgType(arg);
}
internal OrderingArgument(OfChainer arg)
: this(arg as Chainer)
{
SetArgType(arg);
}
/// <summary>
/// Specifies that the values in the specified column should be sorted in ascending order. ASC is the default sort order. Null values are treated as the lowest possible values.
/// </summary>
/// <param name="column">Is a column expression consisting of a table alias and a mapped column on which to sort the query result set.</param>
public static OrderedChainer AsAsc(this OfChainer column)
{
return(new OrderedChainer(column, SortOrder.Asc));
}
internal ValueScalarArgument(OfChainer arg)
: base(arg)
{
}
internal NumericArgument(OfChainer arg)
: this(arg as Chainer)
{
SetArgType(arg);
}
/// <summary>
/// Defines the column collation.
/// </summary>
/// <param name="column">A column.</param>
/// <param name="collation">A collaction name.</param>
public static CollateChainer Collate(this OfChainer column, string collation = "DATABASE_DEFAULT")
{
return(new CollateChainer(column, collation));
}
