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https://issues.apache.org/jira/browse/CASSANDRA-21415?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18085625#comment-18085625
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Stefan Miklosovic commented on CASSANDRA-21415:
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+1
> 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
> Components: Documentation
> Reporter: Arvind Kandpal
> Assignee: Arvind Kandpal
> Priority: Low
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> 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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