List of approver for ALL user in SRM

Hi All,

I want to find list of user and their approvers set up in SRM system.

I know that for INDIVIDUAL users and SC #, the approver can be found using the below functional module

a) BBP_PDH_WFL_APPROVER_GET

b) BBP_PDH_WFL_APPROVAL_SIMULATE

c) BBP_READ_ATTRIBUTES

But I want a table which will list ALL of the USER and their respective approvers.

Thanks in advance

Venkatesh