public virtual OrderByExpression Combine(OrderByExpression other)
{
if (other == null)
{
return(this);
}
var result = this;
foreach (var orderByExpression in other.Iterate().Reverse())
{
result = new ThenOrderByExpression(result, orderByExpression.Expression, orderByExpression.Descending);
}
return(result);
}
private SelectExpression(
ProjectionExpression projection,
TableExpression table,
Expression predicate,
OrderByExpression orderBy,
Expression offset,
Expression limit,
bool isDistinct,
Expression grouping,
bool isWindowed)
{
Projection = projection ?? throw new ArgumentNullException(nameof(projection));
Table = table;
Predicate = predicate;
OrderBy = orderBy;
Offset = offset;
Limit = limit;
IsDistinct = isDistinct;
Grouping = grouping;
IsWindowed = isWindowed;
}
public ThenOrderByExpression(OrderByExpression previous, Expression expression, bool descending)
: base(expression, descending)
{
Previous = previous ?? throw new ArgumentNullException(nameof(previous));
}
public SqlWindowFunctionExpression(SqlFunctionExpression function, OrderByExpression ordering)
{
Function = function ?? throw new ArgumentNullException(nameof(function));
Ordering = ordering ?? throw new ArgumentNullException(nameof(ordering));
}
public SelectExpression UpdateOrderBy(OrderByExpression orderBy)
{
return(new SelectExpression(Projection, Table, Predicate, orderBy, Offset, Limit, IsDistinct, Grouping, IsWindowed));
}