protected override Expression VisitAggregate(AggregateExpression aggregate)
{
this.WriteAggregateName(aggregate.AggregateName);
this.Write("(");
if (aggregate.IsDistinct)
{
this.Write("DISTINCT ");
}
if (aggregate.Argument != null)
{
this.VisitValue(aggregate.Argument);
}
else if (RequiresAsteriskWhenNoArgument(aggregate.AggregateName))
{
this.Write("*");
}
this.Write(")");
return(aggregate);
}
protected override Expression VisitAggregate(AggregateExpression aggregate)
{
this.hasAggregate = true;
return(aggregate);
}
protected virtual Expression VisitAggregate(AggregateExpression aggregate)
{
var arg = this.Visit(aggregate.Argument);
return(this.UpdateAggregate(aggregate, aggregate.Type, aggregate.AggregateName, arg, aggregate.IsDistinct));
}
protected virtual bool CompareAggregate(AggregateExpression a, AggregateExpression b)
{
return(a.AggregateName == b.AggregateName && this.Compare(a.Argument, b.Argument));
}