Move the items from the Available items list to the Selected items list to add Click the + symbol to expand the Items using this item class with drill to detail

Maintaining Items and Item Classes 9-27 to the database which selects the distinct set of values for the item. If there is a large number of values in the database, retrieving the list can take some time. The End User Layer has a record of the length of time it takes to retrieve the values. If this length of time is greater than 15 seconds, Discoverer displays a warning. You can change this limit in Discoverer Plus under Tools | Options | Query Governor. ■ If the item you want to display a list of values for exists in more than one folder, choose the item in the folder that has the least number of rows. This will return the list of values in the shortest amount of time. How to view the list of values for an item class To view the list of values associated with an item class:

1.

Display the Workarea: Data tab . 2. Click the + symbol to expand the item class whose list of values you want to view. This reveals two items under the item class: ■ List of values ■ Items using this item class 3. Click the + symbol to expand the List of values object to display the list of values for the item class. Figure 9–21 Workarea: Item classes tab displaying a list of values Notes ■ Discoverer may warn you that retrieving the list of values may take a long time. When you retrieve a list of values, Discoverer submits a SELECT DISTINCT query to the database which selects the distinct set of values for the item. If there is a large number of values in the database, retrieving the list can take some time. The End User Layer has a record of the length of time it takes to retrieve the values. If this length of time is greater than 15 seconds, Discoverer displays a warning. You can change this limit in Discoverer Plus under Tools | Options | Query Governor. 9-28 Oracle Fusion Middleware Administrators Guide for Oracle Business Intelligence Discoverer How to delete items and item classes To delete items and item classes:

1.

Select the items or item classes to delete as follows: ■ select the items to delete from the Workarea: Data tab ■ select the item classes to delete from the Workarea: Data tab You can select more than one item or item class at a time by holding down the Ctrl key and clicking another one. 2. Choose Edit | Delete to open the Confirm Delete dialog . 3. optional To see the objects that might be affected by deleting the items or item classes you selected for deletion: a. Click Impact to display the Impact dialog . Figure 9–22 The Impact dialog The Impact dialog enables you to review the other EUL objects that might be affected when you delete an item or item class. Note: The Impact dialog does not show the impact on workbooks saved to the file system in .dis files.

b. optional Select a row in the Impact dialog to view text at the bottom of the

list, indicating what affect the current action will have on the EUL object.

c. Click Close when you have finished reviewing the impact that the deletion

will have.

4. Click Yes to confirm you want to delete the selected items or item classes.

About improving performance when end users select parameter values in worksheets You can improve Discoverer’s performance when end users select values for a parameter, by assigning an indexed item to the folder item on which the parameter is based.