*******Problem in VO Extension .........(Not Eo based VO)

Question

Hi all ,
I need to display the new columnin my page ,so i am moving to extend the VO ,whicjh is not entity based ,,,,,
I followed all the steps in jdeveloper,,
after adding extended vo in the first step,,,,
i am getting the parent vo query in the Second Step ,,,,and then moving to third step
it shows create Variable ,,,,,,,clicked on next ,,,,,then in the it displaying the Error ,,,,,
Each row in the Query Result Columns must be mapped to a Unique Query Attribute in the Mapped Entity Coulmns.
please suggest me how to overcome this
Thanks in advance
Kashyap

Answer 1

Hi ,
you might be extending the VO to add new attribute on VO so that you can display a new field on the screen right? ,because in your scenario when u reach to parent vo query in the second Step there u need to modify the query by adding a new required column in select statement ,and then in next step it will generate the view attribute by itself ,if you dont require to make changes in query then there is no purpose of VO extesnion which is not based on EO bcz all attributes will be available as usual .So please modify the query only to get the new view attribute ,all other things will be take care by itself.
Thanks
Pratap