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https://issues.apache.org/jira/browse/CASSANDRA-12107?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sharvanath Pathak reassigned CASSANDRA-12107:
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Assignee: Sharvanath Pathak
> Fix range scans for table with live static rows
> -----------------------------------------------
>
> Key: CASSANDRA-12107
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12107
> Project: Cassandra
> Issue Type: Bug
> Components: CQL
> Reporter: Sharvanath Pathak
> Assignee: Sharvanath Pathak
> Fix For: 3.0.9, 3.8
>
> Attachments: 12107-3.0.txt, repro
>
>
> We were seeing some weird behaviour with limit based scan queries. In
> particular, we see the following:
> {noformat}
> $ cqlsh -k sd -e "consistency local_quorum; SELECT uuid, token(uuid) FROM
> files WHERE token(uuid) >= token('6b470c3e43ee06d1') limit 2"
> Consistency level set to LOCAL_QUORUM.
> uuid | system.token(uuid)
> ------------------+----------------------
> 6b470c3e43ee06d1 | -9218823070349964862
> 484b091ca97803cd | -8954822859271125729
> (2 rows)
> $ cqlsh -k sd -e "consistency local_quorum; SELECT uuid, token(uuid) FROM
> files WHERE token(uuid) > token('6b470c3e43ee06d1') limit 1"
> Consistency level set to LOCAL_QUORUM.
> uuid | system.token(uuid)
> ------------------+----------------------
> c348aaec2f1e4b85 | -9218781105444826588
> {noformat}
> In the table uuid is partition key, and it has a clustering key as well.
> So the uuid "c348aaec2f1e4b85" should be the second one in the limit query.
> After some investigation, it seems to me like the issue is in the way
> DataLimits handles static rows. Here is a patch for trunk
> (https://github.com/sharvanath/cassandra/commit/9a460d40e55bd7e3604d987ed4df5c8c2e03ffdc)
> which seems to fix it for me. Please take a look, seems like a pretty
> critical issue to me.
> I have forked the dtests for it as well. However, since trunk has some
> failures already, I'm not fully sure how to infer the results.
> http://cassci.datastax.com/view/Dev/view/sharvanath/job/sharvanath-fixScan-dtest/
> http://cassci.datastax.com/view/Dev/view/sharvanath/job/sharvanath-fixScan-testall/
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