Last approver of purchase requisition linked to workflow

Question

Hi Guys,
Im writting a report to display retrospectively the usernames of the last approvers of a company's purchase requisitions for auditing purposes.
After searching the forum I found a way to do this:
1) use SAP_WAPI_WORKITEMS_TO_OBJECT to retrieve the Workitem Id of PR.
2) read table SWWWIHEAD with TOP WI_ID as the workitem id and WI_TYPE as W and WI_STAT not equal to Completed
3) use SWWWIHEAD-WI_ID from previous step in SAP_WAPI_WORKITEM_RECIPIENTS to get the recipients.
Does this sound right to you?
should not wi_stat be EQUAL to 'completed' instead?
why can I not just do  select wi_agent from SWWWIHEAD after getting wi_id from the first step?
Thanks in advance for your help.

Answer 1

after tracing SAP_WAPI_WORKITEMS_TO_OBJECT and SAP_WAPI_WORKITEM_RECIPIENTS I found a few tables but I dont know exactly what they are used for.
Could I maybe get the last approver from table SWWVEAGENT (AGENT_ID) coming from swiwiobjct like this:
  SELECT SINGLE wi_id
  INTO ls_wi_id
  FROM swiwiobjct
  WHERE
  objtype = 'BUS2105' AND
  objkey = l_objkey AND
  wi_stat = 'COMPLETED' AND
  wi_lan = 'E' AND
  wi_type = 'F'
  SELECT SINGLE wi_id
  INTO ls_wi_id
  FROM swwveagent
  WHERE
  wi_id = ls_wi_id