Re: syntax question - Mailing list pgsql-general

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@aklaver.com 
> <mailto:adrian.klaver@aklaver.com>> 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@aklaver.com <mailto:adrian.klaver@aklaver.com>
> 


-- 
Adrian Klaver
adrian.klaver@aklaver.com