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

["Benjamin Lerer (Jira)" <ji...@apache.org>]

Benjamin Lerer created CASSANDRA-15435:
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             Summary: 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


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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