private SqlExpression FilterHaving(SqlExpression havingExpression, IList<SqlExpression> aggregates,
IQueryContext context)
{
if (havingExpression is SqlBinaryExpression) {
var binary = (SqlBinaryExpression) havingExpression;
var expType = binary.ExpressionType;
var newLeft = FilterHaving(binary.Left, aggregates, context);
var newRight = FilterHaving(binary.Right, aggregates, context);
return SqlExpression.Binary(newLeft, expType, newRight);
}
// Not logical so determine if the expression is an aggregate or not
if (havingExpression.HasAggregate(context)) {
// Has aggregate functions so we must WriteByte this expression on the
// aggregate list.
aggregates.Add(havingExpression);
var name = new ObjectName(FunctionTableName, String.Format("HAVINGAGG_{0}", aggregates.Count));
return SqlExpression.Reference(name);
}
return havingExpression;
}