How to get worker id

Hello Team,

I have run the GDF report, based on the GDF report I'm trying to run the below script.

script AP_DISCARD_LINE_SEL.sql

How to get Worker_id & No_of_workers

Mandatory parameters:

    1.  Worker_id     : Id of worker

    2.  No_of_workers : total number of workers

    3.  Table_owner   : Owner of table AP_INVOICE_LINES_ALL (Eg AP)

    4.  Batch_size    : number of records a worker should process at a time

    5.  p_start_Date and

   6.  p_end_Date 

Regards

Vijay