> But the select below would never return anything since that 
> TICKETGRANTINGTICKET_ID would be null for us since we are not using any proxy.

Don't believe that's true. The ? parameter placeholder can take a null
value which would be treated by many query engines like an "IS NULL"
where clause. Maybe your platform doesn't do that, but you shouldn't
assume a zero result set based on the query string alone.

M

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