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Re: syntax question

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On 6/3/21 1:01 PM, Marc Millas wrote:
thanks Adrian, exactly what I was missing :-)

about knowing if I should...
We have to create a set of triggers (insert, update, delete) within a huge set of tables. and that list of tables, and structure of them  can be customized, maintained, ... so we were looking for a standard script to automatize the building of the whole thing, taking list of columns  and constraints (for PK) directly from pg_catalog.
Now it works :-)

but.. why do you ask that question ? is there any king of hidden wolf we didnt see ?

See David Johnston's answer. Nested quoting will drive you to drink(or drink more):)




Marc MILLAS
Senior Architect
+33607850334
www.mokadb.com <http://www.mokadb.com>



On Thu, Jun 3, 2021 at 9:11 PM Adrian Klaver <adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@xxxxxxxxxxx>> wrote:

    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.klaver@xxxxxxxxxxx <mailto:adrian.klaver@xxxxxxxxxxx>



--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx





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