[jira] [Created] (CASSANDRA-21415) Document COPY TO limitation for control characters in text columns

["Arvind Kandpal (Jira)" <ji...@apache.org>]

Arvind Kandpal created CASSANDRA-21415:
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             Summary: Document COPY TO limitation for control characters in text columns
                 Key: CASSANDRA-21415
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-21415
             Project: Apache Cassandra
          Issue Type: Improvement
            Reporter: Arvind Kandpal


COPY TO does not support control characters in text column values 
per RFC 4180. This is currently undocumented. Users with text columns 
containing newlines, carriage returns, null bytes, or other 
non-printable characters get silent data corruption on round-trip 
via COPY FROM with no warning.

This ticket tracks a documentation update to cqlsh.adoc clearly 
calling out this limitation and directing users to DSBulk, Spark, 
or sstableloader for such use cases.



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