Re: syntax question

On 6/3/21 12:01 PM, Bruce Momjian wrote:
> On Thu, Jun 3, 2021 at 08:58:03PM +0200, Marc Millas wrote:
>> Hi,
>>
>> within a function, I want to create another function.
>> no pb.
>> but if I write:
>> declare bidule text;
>> begin
>> bidule:='myfunc';
>> create function bidule() ...
>>
>>
>> it does create a function named bidule and not myfunc.
>> so I am obviously missing something too obvious.
>
> You can't create functions inside of functions; same for procedures.
>

Sure you can:

CREATE OR REPLACE FUNCTION public.test_fnc()
RETURNS void
LANGUAGE plpgsql
AS $function$
DECLARE
bidule text;
BEGIN
bidule:='myfunc';
EXECUTE 'create function ' || bidule || '() RETURNS void language
plpgsql AS $fnc$ BEGIN END; $fnc$ ';
END;

$function$

select test_fnc();
test_fnc
----------

\df myfunc
List of functions
Schema | Name | Result data type | Argument data types | Type
--------+--------+------------------+---------------------+------
public | myfunc | void | | func

Whether you should is another question.

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com