BW on HANA: Deleting PSAs and Change Logs

Dear Colleagues,

Can somebody help me with deletion of PSAs and Change Logs in BW on HANA system?

I wanted to know how this can be done using Process Chains or manually.

Further, I have the names of technical tables of selected PSAs and Change Logs derived from HANA Stuido.

Will writing a delete statement on such tables help me with removing the change logs and PSAs?

Thank you.

Warm Regards,

Harshad.