Deletion of PSA and Change Log data using an ABAP program

Hi All,

As a part of house keeping activities, i know how to clean up PSA data and Change log data using manual deletion( deleting requests after selection) and also using process chain after adding the Deletion of PSA data and Deletion of Changelog data process types.

I came to know that there is one more method to delete the PSA and change Log data by using ABAP program.Can somebody clear my doubt what is that program?where to maintain?Is it maintained in any routine?Infact i have searched in google,but i am unable to get the information.Kindly send me some input.

We have to do this activity once in a month.We have so many DSOs and PSAs.

Your reply is kindly awaited.

Regards

Mohan C Reddy