How to change Authorization Scheme on runtime in Oracle APEX

  first make select list item  P4_AUTHORIZTION_SCHEMA

that will contain all Authorization available for your APP

 

use this code as source 

 

select a.d, a.r from (

    select APEX_200200.wwv_flow_lang.system_message('MUST_NOT_BE_PUBLIC_USER') d,'MUST_NOT_BE_PUBLIC_USER' r, 1 

    from dual

    union all

    select APEX_200200.wwv_flow_escape.html(substr(name,1,50)),to_char(id), 1

    from APEX_200200.wwv_flow_security_schemes where flow_id = :APP_ID

    union all

    select '{'||APEX_200200.wwv_flow_lang.system_message('NOT_W_ARGUMENT',APEX_200200.wwv_flow_escape.html(substr(name,1,50)))||'}' d,

     '!'||to_char(id) r, 2

    from   APEX_200200.wwv_flow_security_schemes

    where flow_id = :APP_ID

    order by 3,1) a

and make process to update Application Authorization 

UPDATE APEX_200200.wwv_flows 

SET SECURITY_SCHEME =:P4_AUTHORIZTION_SCHEMA

where ID = :APP_ID;

--
thanks