protected override Expression VisitSubquery(SubqueryExpression subquery)
{
if (((subquery.NodeType == ((ExpressionType)0x3f0)) || (subquery.NodeType == ((ExpressionType)0x3f2))) && (subquery.Select != null))
{
Debug.Assert(subquery.Select.Columns.Count == 1);
this.MarkColumnAsUsed(subquery.Select.Alias, subquery.Select.Columns[0].Name);
}
return(base.VisitSubquery(subquery));
}
protected override Expression VisitSubquery(SubqueryExpression subquery)
{
IList <OrderExpression> gatheredOrderings = this.gatheredOrderings;
this.gatheredOrderings = null;
Expression expression = base.VisitSubquery(subquery);
this.gatheredOrderings = gatheredOrderings;
return(expression);
}
protected virtual Expression VisitSubquery(SubqueryExpression subquery)
{
switch (subquery.NodeType)
{
case ((ExpressionType)0x3f0):
return(this.VisitScalar((ScalarExpression)subquery));
case ((ExpressionType)0x3f1):
return(this.VisitExists((ExistsExpression)subquery));
case ((ExpressionType)0x3f2):
return(this.VisitIn((InExpression)subquery));
}
return(subquery);
}
protected virtual bool CompareSubquery(SubqueryExpression a, SubqueryExpression b)
{
if (a.NodeType == b.NodeType)
{
switch (a.NodeType)
{
case ((ExpressionType)0x3f0):
return(this.CompareScalar((ScalarExpression)a, (ScalarExpression)b));
case ((ExpressionType)0x3f1):
return(this.CompareExists((ExistsExpression)a, (ExistsExpression)b));
case ((ExpressionType)0x3f2):
return(this.CompareIn((InExpression)a, (InExpression)b));
}
}
return(false);
}
protected override Expression VisitSubquery(SubqueryExpression subquery)
{
return(subquery);
}
