private ValueKind AnalyzeMember(MemberExpression node)
{
// check if it is subquery stored in local variable; if yes, retrieve the value and convert to constant
IQueryable subQuery;
if (LinqExpressionHelper.CheckSubQueryInLocalVariable(node, out subQuery))
{
AnalyzeNode(subQuery.Expression); // we need to visit it as well, to process sub-query nodes
return(ValueKind.Db);
}
if (node.Type.IsSubclassOf(typeof(LinqLiteralBase)))
{
return(ValueKind.Constant);
}
if (node.Type == typeof(SequenceDefinition))
{
return(ValueKind.Constant);
}
//regular member access node
var exprValueKind = this.AnalyzeNode(node.Expression);
AddCacheKey(node.Member.Name);
if (node.Member.IsStaticMember())
{
return(ValueKind.Local);
}
else
{
return(exprValueKind); //same as mexp.Expression's valueKind
}
}
//Detect and retrieve sub-query in local variable
protected override Expression VisitMember(MemberExpression node)
{
IQueryable subQuery;
if (LinqExpressionHelper.CheckSubQueryInLocalVariable(node, out subQuery))
{
var newExpr = Visit(subQuery.Expression);
return(newExpr);
}
return(base.VisitMember(node));
}
