Массовое изменение свойств функций на VOLATILE

DO $$
declare
_rec  record;
_args text;
s text;
begin
 for _rec in (
 --113
SELECT
      n.nspname AS schema
      ,proname AS fname
      --,proargnames AS args
      --,t.typname AS return_type
      --,d.description
      --,pg_get_functiondef(p.oid) as definition
      ,sum(1) over(partition by n.nspname||'.'||proname) as rn
  FROM pg_proc p
  JOIN pg_type t
    ON p.prorettype = t.oid
  LEFT OUTER
  JOIN pg_description d
    ON p.oid = d.objoid
  LEFT OUTER
  JOIN pg_namespace n
    ON n.oid = p.pronamespace
 WHERE n.nspname not in ('pg_catalog','pkg_process','pkg_user_management') and
       provolatile='s'
       and proname not in ('getphotoids','fnc_get_dict_element','f_increment_num')
 ) loop
  SELECT pg_get_function_identity_arguments((_rec.schema||'.'||_rec.fname)::regproc) into _args;
  s:='alter function '||_rec.schema||'.'||_rec.fname||'('||_args||') VOLATILE;';
  raise notice '%',s;
  execute s;
 end loop;
END
$$

alter function pkg_get_cabinet.get_zas_mrg_guest_list(INOUT refcur refcursor, in_comment_id integer) VOLATILE;

postgres стек ошибки с указанием строки

do language plpgsql $$
declare
  l_message_text text;
  l_excp_context text;
begin

.... код

exception
when others then
    GET STACKED DIAGNOSTICS
      l_message_text = MESSAGE_TEXT,
      l_excp_context := PG_EXCEPTION_CONTEXT;  
    raise notice 'message text: >> % <<', l_message_text;
    raise notice 'exception stack: >> % <<', l_excp_context;
 end;
$$