List of Values (LOVs), are used to assist the report consumer when refreshing a prompted report. LOVs display the values for a prompted filter by running a Select Distinct command for the object being filtered.
By default,all dimension and detail objects created in a universe have LOCs attached to them.It's important to disable LOVs if the full list of values can't be displayed within 3 seconds.Slow-loading LOVs will have a negative impact on the user and the overall acceptance of the report will be affected.
Custom list of values can be created if default LOV is slow to load.
Viewing or Editing a List of Values
Following are the steps for editing a LOV associated with an existing object:
1.Double-click an object in a universe to launch the Edit properties window.
2.Click the Properties tab to view the LOV properties.
Tips for Editing a List of Values
- Uncheck the Associate a List of Values checkbox to disable the LOV of the selected object.This should be done when a LOV takes more than a couple of seconds to load when the object is used in a prompt filter.
- Click display to show the actual list of values of the selected object.This button can be used as a performance test for loading the values.
- Click Edit to launch the query panel to modify the Select Distinct statement created by default.Apply filters or modify the result objects of the LOV to improve the LOV performance.
Additional List of Values Settings
The following settings are enabled or disabled by checking or unchecking the associated checkbox:
- Allow users to Edit This List of Values
- Automatic Refresh Before Use
- Hierarchical Display
- Export With Universe
- Delegate Search