How do I get the index of VARRAY items after converting to a table

Question

In the following example I create a VARRAY with 3 items.

TEST@XE> select t1, t2.* from
  2  (select \'X\' as t1 from dual UNION select \'Y\' from dual) t1         


        

Answer 1

I'm wondering why nobody came up with this, so I'm answering my own question

select t1, t2.* from 
(select 'X' as t1 from dual UNION select 'Y' from dual) t1, 
(select ROWNUM rn, COLUMN_VALUE from table (sys.odcivarchar2list('a', 'b', 'c'))) t2

T1          RN COLUMN_VALUE
--- ---------- --------------------
X            1 a
X            2 b
X            3 c
Y            1 a
Y            2 b
Y            3 c

The question remains however, whether this is actually guaranteed to work 100%