Document COPY TO limitation for control characters in text columns
COPY TO does not support control characters in text column values per RFC 4180. This patch documents the limitation in the cqlsh reference, including the security risks and alternative tools for data migration.
patch by Arvind Kandpal; reviewed by Brad Schoening, Stefan Miklosovic for CASSANDRA-21415
Co-authored-by: Copilot Autofix powered by AI 175728472+Copilot@users.noreply.github.com