IDOC related to workflow task

Question

Is there any table or report which gives IDOC nos related to workflow task?

Answer 1

Sreedevi, it depends what you want (where you start from), so please be more specific in your question next time (or if this doesn't answer your question).
If you have a work item number and want to know the IDoc number you can use function module SAP_WAPI_OBJECTS_IN_WORKITEM to get a list of all object references. Then you have to process it from there. You can make a flexible solution which is compatible with future added IDoc types by checking the object type of each object returned and traversing the inheritance hierarchy until you get to object type IDOC. Then you know it is an IDoc, and you can find the IDoc number as the key of the object. Or you can hardcode supported object types using a CASE or IF statement. The flexible solution would be much more fun to program in my opinion.
If you have an IDoc number and want to find work items you have to go the other way. That means starting with object type IDOC, finding all the inherited object types and for each of these using function module SAP_WAPI_WORKITEMS_TO_OBJECT. Again, another possibility is to hardcode the list of object types you want to check.
The table Rose told you about, HRS1201, contains no IDoc numbers, but it contains all the tasks with the methods they use. So actually you can use that to find all the object types you need to check (whether they are inherited from IDOC), since all work items will refer to a task definition.