'with caller privileges' has no effect in triggers

[Khalyutin]

fb.5 & fb.4 'with caller privileges' has no effect in triggers

(no this error in stored procedure )

tested in linux & windows FB3, FB4 & FB5
work on FB3. exception on FB4 & FB5

example under windows:

rem cd C:\TOOLSET\Firebird\Firebird_3_0
rem cd C:\TOOLSET\Firebird\Firebird_4_0

cd C:\TOOLSET\Firebird\Firebird_5_0

isql

connect 'd:\database\FB5\my_database.fdb' user 'SYSDBA' ; 
drop user my_user;
drop  database;

create database 'd:\database\FB5\my_database.fdb' user 'SYSDBA'  page_size 8192 default character set UTF8;
set term ^;

create user my_user password 'my_pass' ^
commit work ^

create table my_table
( my_num   integer
, my_data  varchar(255)
) ^
commit work ^
insert into my_table(my_num , my_data) values (1, 'qwerty') ^
commit work ^

create table my_table_2
( my_num   integer
, my_data  varchar(255)
) ^
grant all on table my_table_2 to user my_user ^
commit work ^

create or alter trigger my_table_2_trigger  
    for      my_table_2
    active   before insert or update or delete 
    position 100 
as
   declare variable nm$check_ok     integer;
begin     

        execute statement 'select first 1 1 from my_table ' 
              with caller privileges  
                    into: nm$check_ok;             

end ^
grant all    on table my_table_2 to trigger my_table_2_trigger ^
grant select on table my_table   to trigger my_table_2_trigger ^  -- <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

commit work ^


connect 'd:\database\FB5\my_database.fdb' user 'my_user' ^ 
insert into my_table_2(my_num , my_data) values (1234, 'qwerty') ^

-- in FB5 and FB4
-- Statement failed, SQLSTATE = 28000
-- no permission for SELECT access to TABLE MY_TABLE
-- -Effective user is MY_USER
-- -At trigger 'MY_TABLE_2_TRIGGER' line: 12, col: 13

commit work ^
select * from my_table_2 ^

-- in FB 3 :
-- MY_NUM MY_DATA
-- ===================================
-- 1234 qwerty