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Posted to commits@cassandra.apache.org by "Benjamin Lerer (Jira)" <ji...@apache.org> on 2019/12/09 10:07:00 UTC

[jira] [Updated] (CASSANDRA-15435) SELECT JSON does not return the correct value for empty blobs

     [ https://issues.apache.org/jira/browse/CASSANDRA-15435?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Benjamin Lerer updated CASSANDRA-15435:
---------------------------------------
    Test and Documentation Plan: Unit tests
                         Status: Patch Available  (was: In Progress)

> SELECT JSON does not return the correct value for empty blobs
> -------------------------------------------------------------
>
>                 Key: CASSANDRA-15435
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-15435
>             Project: Cassandra
>          Issue Type: Bug
>          Components: CQL/Interpreter
>            Reporter: Benjamin Lerer
>            Assignee: Ekaterina Dimitrova
>            Priority: Normal
>         Attachments: 0001-Patch-applied-successfully.patch, Screen Shot 2019-11-27 at 9.24.23 AM.png, Screen Shot 2019-11-27 at 9.25.09 AM.png, Screen Shot 2019-11-27 at 9.25.37 AM.png, Screen Shot 2019-11-27 at 9.26.09 AM.png, Screen Shot 2019-11-27 at 9.26.20 AM.png, Screen Shot 2019-11-27 at 9.26.33 AM.png
>
>
> In an attempt to fix the side effect of a problem CASSANDRA-13868 was committed in 2.2.11, 3.0.15, 3.11.1 and trunk.
> This patch introduced an issue on how empty values were rendered by {{SELECT JSON}} queries.
> Instead of returning the correct value for the type a null value was now returned.
> A user detected that problem for text column and opened CASSANDRA-14245 to request a fix for that problem. Unfortunately, I misunderstood the problem and the fix did not solve the real problem. It only made the code return 'an empty string instead of null values.
> The proper fix is to rollback the changes made for CASSANDRA-13868 and CASSANDRA-14245.
> Some unit tests also need to be added to test the behavior.



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