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https://issues.apache.org/jira/browse/CASSANDRA-6623?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13885136#comment-13885136
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Csaba Seres commented on CASSANDRA-6623:
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Dear Sylvain Lebresne,
Sorry for the late reply but we had much work to finish. Thank you for your
respond. We wanted to use lightweight transaction as a semaphore (to lock a row
or a Column Family). We would have used the TTL to guarantee a time limit for
processes. As the null problem is only in CQL3 table, we use Compact Storage
table for timed semaphores.
Best Regards,
Csaba Seres
> Null in a cell caused by expired TTL does not work with IF clause (in CQL3)
> ---------------------------------------------------------------------------
>
> Key: CASSANDRA-6623
> URL: https://issues.apache.org/jira/browse/CASSANDRA-6623
> Project: Cassandra
> Issue Type: Bug
> Components: Tests
> Environment: One cluster with two nodes on a Linux and a Windows
> system. cqlsh 4.1.0 | Cassandra 2.0.4 | CQL spec 3.1.1 | Thrift protocol
> 19.39.0. CQL3 Column Family
> Reporter: Csaba Seres
> Priority: Minor
> Fix For: 2.0.4
>
>
> IF onecell=null clause does not work if the onecell has got its null value
> from an expired TTL. If onecell is updated with null value (UPDATE) then IF
> onecell=null works fine.
> This bug is not present when you create a table with COMPACT STORAGE
> directive.
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