Using Manual Select placeholders
This article shows you how to define a placeholder for a Manual Select transform and use it in your manual queries. A placeholder is basically a parameter which you can later connect to a filter control on a dashboard.
2. Using a placeholder with SQL
2.1. Defining a placeholder
For this example, create a new data cube using the Manual Select option.
In the Open File dialog, select a SQL Server data connector (e.g., Adventure Works) and click Submit.
In the Script Editor window, enter a parameterized SQL statement where each parameter is enclosed between dollar sign ($) characters. Then click Save.
select * from [Sales].[vSalesPerson] where BusinessEntityId = $BEID$
A Manual Select and Process Result transform appear on the canvas. Double-click the Manual Select transform in order to configure it.
In the Manual Select configuration dialog, click Define Placeholders. In the Define Placeholders dialog, click Add placeholder and then set the following values:
- Set the Identifier to $BEID$
- Set the Parameter Name to Business Entity ID
- Set the Data Type to Number
- Set the Numeric Value to 274
- Select the Is Public checkbox
Click Submit and close the dialogs. Select the Process Result transform on the canvas. Then click Data Preview. You'll see that the records returned by the manual query have been filtered to the Numeric Value (BusinessEntityID = 274).
2.2. Using the placeholder on a dashboard
Next, create a new dashboard to see how to connect this placeholder parameter to a filter control.
Go to the Explore window and expand the data cube that was just created. Drag the SalesYTD measure to the canvas. It will appear as a table visualization. Then drag the FirstName dimension onto the table (Row Header drop region).
Select the table visualization, go to the toolbar, click Filter, and then select Single Number. In the Filter Binding Panel, select the Business Entity ID item. This is the placeholder that was created earlier.
Finally, switch to View mode to use the filter.
3. Using a stored procedure with a placeholder
In order to execute a Stored Procedure in the Script Editor, you need to uncheck the Enable Subquery Optimization checkbox in the Manual Select transform configuration.