How to get response message

[Rama Krishnan]

Hi All,

I am want to delete old records using function so my senior has function
like below but I want to get response of this particular inside query
wheter it is successful or failure

How to get response of the function status

 create or replace function data_purge() returns void as$$
Declare
Begin
Drop table test_old;
Create table test_old as select * from sales where bill_date<now()
-interval '1 year';

Delete table sales where sales_id in (select sales_id from test_old;

End;
$$ language plpgsql;