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Queries 93

Creating a Query in vFoglight

Ensure that the Data Source ID field’s value is <default>.

Add any Required Parameters needed by the query.

These are values that are supplied at run time, usually from a context input.

Select the Object Type by clicking the drop-down arrow at the right of this field.

Choose the object from the drop-down list.

A list of all the objects known to the running vFoglight instance appears. You’ll

be able to browse this object as soon as you have set the path in the next step.

Note This list box responds to keystrokes. You can type a letter and be taken right to the

desired entry.

Searches normally start from the root (/), so ensure that Root Path, Root contains

a slash (/).

Objects are grouped at some level down from the root. Choose the object you

want from the drop-down list in the with Path field. You might need to set the

Max Search Depth field as well.

You can have the query return aggregate values by setting Aggregations and

Identifying Values.

You can filter results by specifying a value for N, either by giving it a specific

value or by declaring a parameter that returns a value.

You can sort the returned result by choosing one or more items in a list.

You can use a Where clause to use a condition to limit the returned objects to the

ones that match the criterion.

You can test the query by clicking the Test button at the top of the Edit pane.

The Query Results dialog appears, showing the name or names of the servers

returned by the query and, in this case, the Data Type of the object, which is Host.

The Valu e field is empty because there is no numerical value associated with

objects. Simple types have values, objects do not.

Note You can see that the query did return a list of objects by clicking the expand icon (+)

at the left any host name in the

Query Results dialog. When you do, you’ll see that

some properties of the host, such as its topologyObjectId and

topologyObjectVersionId, have numerical values, while others, such as

agents,

which are themselves objects, do not.

The

Query Results dialog allows you to see all the properties of the object, which is

useful if you want to determine their names for use later on.

Note The topologyObjectId and topologyObjectVersionId properties mentioned in the

previous note should not be used to select a particular object. If you do need to use

a specific object in a custom view during a running session it is better to set an

additional context value of type Data, type in a name for the Key, and navigate to the

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