How to use a PIPELINE in plsql

Hi Experts,

We have a requirement where the 'select person_id from TABLE(abc_pkg.abc_fun(:transactionId)) ORDER BY emp_level' should be used where it returns more than one person (we are using this query in Oracle Apps AME to fetch the list of approvers. So we need to use in this format only).

We have XX_EMP_APPRVR_TBL table where it has list of all employees. So, we need to fetch all person_ids from XX_EMP_APPRVR_TBL using abc_pkg.abc_fun. Here, we heared that we need to use PIPELINE command to achieve the result.

Can anyone please help me on how to create function using PIPELINE

Thanks and Regards,

Sri