Configuration Manager Result Sets
Updated: October 28, 2009
Applies To: System Center Configuration Manager 2007, System Center Configuration Manager 2007 R2, System Center Configuration Manager 2007 R3, System Center Configuration Manager 2007 SP1, System Center Configuration Manager 2007 SP2
In Configuration Manager 2007, the result set of a query contains one or more instances that match the specified criteria of the
SELECT statement. The result instances are either
Generic class instances or instances of the class that is specified in the FROM clause.
__Generic Class Results
The results of a
JOIN operation are returned in either an instance of a class specified in the query or an instance of the __
Generic class. If a single class is implied by the property list in the SELECT statement, the results are returned as instances of that class. If there are multiple classes, the results are returned as instances of the __Generic class.
Generic class is a generic container for the results of
JOIN operations and
COUNT operations. This class has no set definition. Its properties depend on its use at the time. For
JOIN results, the properties are embedded objects representing the classes specified in the query, as the following example shows.
SELECT * FROM SMS_Package AS Pack
INNER JOIN SMS_Program AS Prog
ON Pack.PackageID = Prog.PackageID
The following example shows the __Generic class result of the above query.
For COUNT results, the instance includes a Count property, as the following class shows.
Actual Class Instance Results
The class instances that are returned in a result set contain both system and class properties. However, embedded and lazy properties are not returned.
The system properties include those for the specified class and its derived classes. Because not all system properties are relevant to all queries, the value of a particular system property can be null.
The class properties that are returned depend on whether you specify a property list or the asterisk. If you specify a property list containing one or more class properties, the returned instance contains only the properties in the list. The property list should include the key properties for the class. When you invoke a query that does not specify key properties in the property list, the result set contains incomplete and therefore incorrect values for the system properties,