Re: Strange behaviour on function

yes!!
I solved using quote_nullable on hrec[k].

I was convinced string || NULL --> string

but I'm wrong.

Thanks!!

Il giorno mer 5 lug 2023 alle ore 15:53 Erik Wienhold <ewie(at)ewie(dot)name> ha
scritto:

> > On 05/07/2023 14:23 CEST Lorusso Domenico <domenico(dot)l76(at)gmail(dot)com>
> wrote:
> >
> > Hello guys,
> > here a simple function
> >
> > CREATE OR REPLACE FUNCTION bind_action(
> > sqlstr text,
> > hrec hstore)
> > RETURNS text
> > LANGUAGE 'plpgsql'
> > COST 100
> > immutable PARALLEL SAFE
> > AS $BODY$
> > declare
> > _sqlstr text=sqlstr;
> > _k text;
> > _debug text;
> > begin
> > _debug= '--Start' || _sqlstr;
> > foreach _k in array akeys(hrec) loop
> > _debug =_debug || format($$
> > hstore: %s %s
> > sqlStr:$$, _k, hrec[_k]);
> > _sqlstr=replace(_sqlstr, ':'||_k||':', hrec[_k]);
> > _debug =_debug || _sqlstr;
> >
> > end loop;
> >
> > raise notice 'final %',_debug;
> > return _sqlstr;
> > end;
> > $BODY$;
> >
> > and here a simple test
> > do
> > $$
> > declare
> > sqlstr text=':id::bignt,:surpa:,:disfa:';
> > hs hstore;
> > begin
> > hs['id']=789;
> > hs['disfa']='ssssssss';
> > raise notice '%',bind_action(sqlstr,hs);
> > end;
> > $$;
> >
> > and it works.
> > But...
> > When I call this function in a function called by a trigger it down't
> work
> > _debug variable becomes null, also _sqlstr becomes null...
>
> Does the hstore contain nulls? Function replace returns null in that case.
>
> Please show us the trigger, its function, and a reproducer.
>
> --
> Erik
>

--
Domenico L.

per stupire mezz'ora basta un libro di storia,
io cercai di imparare la Treccani a memoria... [F.d.A.]