James Taylor created PHOENIX-1902:
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             Summary: Do not perform conflict detection for append-only tables
                 Key: PHOENIX-1902
                 URL: https://issues.apache.org/jira/browse/PHOENIX-1902
             Project: Phoenix
          Issue Type: Sub-task
            Reporter: James Taylor
            Assignee: Thomas D'Silva


When a table is declared as write-once/append-only (IMMUTABLE_ROWS=true), then 
we should disable the conflict detection being done by Tephra as there can be 
no conflicts. This is a much lighter weight model that relies on Tephra mainly 
to:
- filter rows for failed (and unabortable) transactions.
- not show transactional data until it has successfully been committed.



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