protected virtual void ProcessGroupOperators(StringBuilder sb, List<GroupResultOperator> groupBy)
{
if (groupBy.Count > 1)
throw new FrameworkException("More than one group operator!?");
else if (groupBy.Count == 1)
{
var group = groupBy[0];
sb.AppendLine("GROUP BY");
sb.AppendLine(GetSqlExpression(group.KeySelector));
}
}