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From Maciej Miklas <mac.mik...@googlemail.com>
Subject CQL 3.0 - UPDATE Statement - how it works?
Date Wed, 25 Apr 2012 11:18:27 GMT
CQL will have UPDATE future, I am trying to understand how this could work.

Every write is an append to SSTable, UPDATE would need to change data, but
only if it exists, and this is problematic, since we have distributed
system.

Is UPDATE special kind of insert, which changes given data only if it
already exists? Will be UPDATE resolved first during read operation
(SSTable merge)?


Thanks,
Maciej

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