public virtual Expression VisitOrdering(OrderingExpression node)
{
return base.VisitExtension(node);
}
public override Expression VisitOrdering(OrderingExpression ordering)
{
string value;
switch ((CqlExpressionType)ordering.NodeType)
{
case CqlExpressionType.OrderDescending:
value = _translations[ordering.Selector] + " DESC";
break;
case CqlExpressionType.OrderAscending:
value = _translations[ordering.Selector] + " ASC";
break;
default:
throw new CqlLinqException("Unexpected ordering type encountered: " + ordering.NodeType.ToString());
}
_translations[ordering] = value;
return ordering;
}
protected override Expression VisitChildren(ExpressionVisitor visitor)
{
bool changed = false;
var selectClause = (SelectClauseExpression) visitor.Visit(_selectClause);
changed |= selectClause != _selectClause;
int count = _whereClause.Count;
var wheres = new RelationExpression[count];
for (int i = 0; i < count; i++)
{
wheres[i] = (RelationExpression) visitor.Visit(_whereClause[i]);
changed |= wheres[i] != _whereClause[i];
}
count = _orderBy.Count;
var order = new OrderingExpression[count];
for (int i = 0; i < count; i++)
{
order[i] = (OrderingExpression) visitor.Visit(_orderBy[i]);
changed |= order[i] != _orderBy[i];
}
return changed
? new SelectStatementExpression(_type, selectClause, _tableName, wheres, order, _limit,
_allowFiltering)
: this;
}