Re: Dynamic binding issue

Because the function is general and should do the same thing for many
different table.
Unique constraint, each table must have a field with a specific type

Il mar 13 giu 2023, 01:31 Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com> ha
scritto:

> 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
>
>