Re: Dynamic binding issue

On 6/12/23 15:13, Lorusso Domenico wrote:
> Hello guys,
> I'm a problem with dynamic sql.
> I am trying to write a generic function that is able to read and update
> a table based on some data coming from e previous record.
> Here the example
> _sqlStr=format('select *
>   from  %1$s.%2$s
>   where (' || array_to_string(_activeRec.pk_columns_list, ',') || ') in
> (select ' ||
>   'row($1[''' || array_to_string(_activeRec.pk_columns_list,
> '''],$1[''') || ''']))'
>   , _activeRec.name_of_schema, _activeRec.main_table);
>
> execute _sqlStr using oldRec into _rec;
>
> My problem is oldRec is a type record, so the substitution performed by
> execute fails, because it can't recognize the field if the variable is
> record and not a specific composite record type.

Why not use a row type?:

https://www.postgresql.org/docs/current/plpgsql-declarations.html#PLPGSQL-DECLARATION-ROWTYPES

>
> I suppose this is a recurrent question, but I can't find a solution...
>
> --
> Domenico L.

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