protected AggregateSubqueryExpression UpdateAggregateSubquery(AggregateSubqueryExpression aggregate, ScalarExpression subquery)
{
if (subquery != aggregate.AggregateAsSubquery)
{
return new AggregateSubqueryExpression(aggregate.GroupByAlias, aggregate.AggregateInGroupSelect, subquery);
}
return aggregate;
}
protected override Expression VisitAggregateSubquery(AggregateSubqueryExpression aggregate)
{
Expression mapped;
if (this.map.TryGetValue(aggregate, out mapped))
{
return mapped;
}
return this.Visit(aggregate.AggregateAsSubquery);
}
protected virtual Expression VisitAggregateSubquery(AggregateSubqueryExpression aggregate)
{
var subquery = (ScalarExpression)this.Visit(aggregate.AggregateAsSubquery);
return this.UpdateAggregateSubquery(aggregate, subquery);
}
protected virtual bool CompareAggregateSubquery(AggregateSubqueryExpression a, AggregateSubqueryExpression b)
{
return this.Compare(a.AggregateAsSubquery, b.AggregateAsSubquery)
&& this.Compare(a.AggregateInGroupSelect, b.AggregateInGroupSelect)
&& a.GroupByAlias == b.GroupByAlias;
}
protected override Expression VisitAggregateSubquery(AggregateSubqueryExpression aggregate)
{
this.aggregates.Add(aggregate);
return base.VisitAggregateSubquery(aggregate);
}