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https://issues.apache.org/jira/browse/CASSANDRA-8335?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14216820#comment-14216820
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Brian ONeill edited comment on CASSANDRA-8335 at 11/18/14 9:37 PM:
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That is presently what we do, and exactly our situation.
(the result might have been computed to value X or never computed)
In data flows, it is inconvenient to pass along whether or not there was an
original value during the read. (and it really shouldn't matter)
was (Author: boneill42):
That is presently what we do, and exactly our situation. (result might have
been computed to value X or never computed)
> Support CAS with UPDATE...IF col=val OR NOT EXISTS
> --------------------------------------------------
>
> Key: CASSANDRA-8335
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8335
> Project: Cassandra
> Issue Type: New Feature
> Components: Core
> Reporter: Robert Stupp
> Priority: Minor
> Labels: cas, cql
>
> On the -dev mailing list the RFE to extend UPDATE LWT using something like
> {{UPDATE ... IF col=val ... OR NOT EXISTS}}
> RFE is to add the {{OR NOT EXISTS}} which means either the the {{IF}}
> conditions are met *xor* the row does not exist.
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