Viewing TQL Query Results
You view the resulting data in a visual representation in IT Universe Manager. The queries define the structure of the resulting topology map. The view displays only those CIs and relationships that meet the query definition. You can also view the results of a query by clicking the Preview 
button on the toolbar to open a preview display identical to IT Universe Manager. For more details about IT Universe Manager, see IT Universe Manager.
TQL Query Types and Priorities
When you define a TQL query, you define the type of the TQL query in the Type field of the Query Definition Properties dialog box. The following query types are available:
-
View. TQL queries used as the basis for pattern views.
-
Integration. TQL queries used for integrations.
-
Discovery. TQL queries used as the basis for Data Flow Management (DFM) patterns.
-
Template. TQL queries used as the basis for templates.
-
Perspective. TQL queries used as the basis for perspectives.
-
Impact Analysis. TQL queries used as the basis for Impact rules. This is the default type for queries created in Impact Analysis Manager.
-
Enrichment. TQL queries used as the basis for Enrichment rules. This is the default type for queries created in Enrichment Manager.
You cannot change the type of an existing TQL query if it has dependencies (such as views, templates, and so on).
If a query imported though an integration is not assigned a type, it is considered a hidden query and does not appear in the query list in the Modeling Studio. To display hidden queries in the query list, change the setting for hidden queries under General in the User Preferences dialog box. For details, see User Preferences Dialog Box.
You can also set the priority level of a TQL query, which determines how often the query is rerun automatically to include updated information. The following priorities are available:
-
Low. The TQL query is refreshed every 2 minutes.
-
Medium. The TQL query is refreshed every 30 seconds.
-
High. The TQL query is refreshed every 10 seconds.
-
Express. The TQL query is refreshed continuously.
-
Not Active. The TQL query is inactive.
Note The above refresh times are average values.
If you set the priority of a TQL query to Not Active, the query becomes inactive and is not run automatically; however, it can be used for manually building a view.
Base Queries
You can select a base query for a TQL query in the Query Definition Properties dialog box. In this case, the base query is first applied to the entire IT Universe, generating results. The new query is then applied to that subset of the universe, further refining the results. Selecting a base query enables you to filter the query results more finely and generate results more quickly in certain cases.
The base query you select must be both active and persistent for your new query to be active. If the base query is not active and persistent, the new query is automatically assigned a priority of Not Active.
TQL Query Thread Pool
Each TQL query is calculated in a separate thread, taken from a thread pool. If there are many TQL queries being calculated, you can increase the thread pool size to improve performance. Edit the TQL Threads Pool Size setting in the Infrastructure Settings Manager. The pool size can be any integer value between 1 and 64. If no value is entered, the pool size is automatically set to be the number of CPU cores divided by the number of customers (if this number is smaller than 4, it is set to a minimum of 4 threads).