Configuring Allowing Null Values

If all the fields in the database row for the aggregate object are null, then, by default, TopLink places null in the appropriate source object, as opposed to filling an aggregate object with null values.

Using TopLink Workbench

To allow a mapping to contain a null value, use this procedure.

1. Select the mapped attribute in the Navigator. Its properties appear in the Editor.

2. Click the General tab. The General tab appears.

   Figure 47-1 General Tab, Allow Null Option

   
   Description of "Figure 47-1 General Tab, Allow Null Option"
   
   

Select the Allows Null option to allow this mapping to contain a null value.