row table%ROWTYPE;

TYPE NUMBER_LIST IS TABLE OF NUMBER;
number_list NUMBER_LIST := NUMBER_LIST();

TYPE FIELD_LIST IS TABLE OF table.field%TYPE;
tmp_n_list FIELD_LIST;

TYPE MAP IS TABLE OF FIELD_LIST INDEX BY BINARY_INTEGER;
map MAP;

result := dbms_sql.execute(cursor_id);
WHILE dbms_sql.fetch_rows(cursor_id) >  0  LOOP
  dbms_sql.column_value(cursor_id,  1 , field_value);
  number_list.EXTEND( 1 , field_value);
END LOOP;

IF NOT map.EXISTS(index) THEN
  map(index) := FIELD_LIST(row.field);
ELSE
  map(index).EXTEND( 1 , row.field);
  /* так тоже не работает :(
  tmp_n_list := map(index);
  tmp_n_list.EXTEND(1, row.field);
  map(index) := tmp_n_list;
  */
END IF;

ORA-06533: Subscript beyond count

  tmp_n_list := map(index);
  tmp_n_list.EXTEND;
  tmp_n_list(tmp_n_list.COUNT) := row.field;
  map(index) := tmp_n_list;