ikke i stand til at skrive store data med UTL_FILE.PUT_LINE

UTL_FILE-dokumentationen siger :

Du bliver nødt til at skrive CLOB stykke for stykke. Noget som dette:

DECLARE
  v_clob CLOB;
  v_clob_length INTEGER;
  pos INTEGER := 1;
  buffer VARCHAR2(32767);
  amount BINARY_INTEGER := 32760;
  prodFeed_file utl_file.file_type;
BEGIN
  prodFeed_file := UTL_FILE.FOPEN ('CSV_DIR', 'productFeedLargo.xml', 'w', 32767);
  v_clob := l_xmltype.getClobVal;
  v_clob_length := length(v_clob);

  WHILE pos < v_clob_length LOOP
    dbms_lob.read(v_clob, amount, pos, buffer);
    utl_file.put(prodFeed_file , char_buffer);
    utl_file.fflush(prodFeed_file);
    pos := pos + amount;
  END LOOP;

  utl_file.fclose(prodFeed_file);

END;
/