In reply to dave_59:
@dave_59 - I am aware of the solution with the existing syntax. But the scenario there was different. At that time, I wanted a unique address value for ‘every’ new sequence item that was generated. So we choose to have a static queue that has one instance and is visible to all sequence items.
Now, I want unique elements in a multi-dimensional array ‘contained within a single’ sequence item. The unique constraint addresses this situation (but the above solution does not). How were you dealing with this situation upto now?