Re: select from composite type

ah ehm.. I solved, it was very easy but I believed it should use the
from clause...

execute 'select ($1).* ' using _attribute into _r;

Il giorno mar 6 feb 2024 alle ore 01:01 Lorusso Domenico <
domenico(dot)l76(at)gmail(dot)com> ha scritto:

> here an example (the actual case in more complex, but the point it's the
> same)
>
> do $$
> declare
> _attribute_list temp1.my_type[];
> _attribute temp1.my_type;
>
> _r record;
> begin
> _attribute_list=array[row(1,'Hello') , row(2,'Goodbye')];
>
> _attribute= row(1,'Doh!!!!');
>
> raise notice '%', _attribute_list;
>
> for _r in execute 'select * from unnest($1) where foo=1' using
> _attribute_list loop
> raise notice '%', _r;
> end loop;
>
> --Error
> execute 'select * from $1' using _attribute into _r;
>
> raise notice '%', _r;
> end;
> $$;
>
> So I able to manage an array of complex type (why I use an array, because
> in a previous answer the community suggest to me to use an array to pass a
> list of information instead of temporary table), but I can't do the same
> thing with just an element.
>
> Of course I can set an element as part of an array with just that element
> but. it's sad...
>
>
> Il giorno lun 5 feb 2024 alle ore 01:48 David G. Johnston <
> david(dot)g(dot)johnston(at)gmail(dot)com> ha scritto:
>
>> On Sun, Feb 4, 2024 at 5:39 PM Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>
>> wrote:
>>
>>>
>>> >
>>> > attribute_list is an array of composite type (with 20 fields).
>>>
>>> I am trying to wrap my head around "array of composite type". Please
>>> provide an example.
>>>
>>
>> ARRAY[ (1,2)::point, (3,4)::point ]::point[]
>>
>> The main problem is the concept of writing "from($1)" in any query makes
>> no sense, you cannot parameterize a from clause directly like that. You
>> have to put the value somewhere an expression is directly allowed.
>>
>> David J.
>>
>
>
> --
> Domenico L.
>
> per stupire mezz'ora basta un libro di storia,
> io cercai di imparare la Treccani a memoria... [F.d.A.]
>

--
Domenico L.

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