Looping through fields

Hello

I wonder if there is a possibility to not
only loop through record's with a FOR loop,
but also loop through the record itselfs.
Meaning something like that:

FOR record IN SELECT * FROM table LOOP

FOR each field IN record LOOP

return all field values

END LOOP

END LOOP

I fear I have to read the systems table to
get all field names and then read one field
after another from the record with the names
from the systems table?

Regards
elf