[GitHub] keith-turner opened a new issue #527: Add set if non-existant operation

[GitBox <gi...@apache.org>]

keith-turner opened a new issue #527: Add set if non-existant operation
URL: https://github.com/apache/fluo/issues/527
 
 
   A transactional operation to only set a value if does not exists would be useful.  When this could be used, it would avoid a read/get in the transaction.  This would be useful for a load transaction that checks if something does not exist.  It would also be useful for implementing a queue.
   
   I think this could be implemented in the 1st phase of two phase commit when locking row/columns.  The conditional mutation that acquires the lock could do the empty check as part of its other checks.
   

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