Thank you Philip for the answer.

regarding option b)

> b) if there's more to it, dynamically build up the EXECUTE BLOCK as you did
> above, then execute the whole thing as a statement (keeping in mind that you
> need to build up a statement that looks like:
>
> execute block (parameter names and types...) returns (column names and
> types...) as
> begin
> for select ... into ... do suspend;
> end

When I dynamically build the EXECUTE BLOCK it will have different columns number for each execution. Because of that I will be not possible to execute it as a statement since when I am executing it as a statement I would also have to define the returning columns, right?