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https://issues.apache.org/jira/browse/CASSANDRA-17617?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17553506#comment-17553506
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Berenguer Blasi commented on CASSANDRA-17617:
---------------------------------------------
||PR||CI||
|[3.11|https://github.com/apache/cassandra/pull/1679]|[j8|https://app.circleci.com/pipelines/github/bereng/cassandra/684/workflows/5a872292-e0c3-4695-b4e8-f8e024da101a]|
|[4.0|https://github.com/apache/cassandra/pull/1680]|[j8|https://app.circleci.com/pipelines/github/bereng/cassandra/681/workflows/c48d3dd4-a9b9-47f8-8369-c600b91a8e70]
[j11|https://app.circleci.com/pipelines/github/bereng/cassandra/681/workflows/f867d2e9-2077-4937-97fe-8ea5bedba3e7]|
|[4.1|https://github.com/apache/cassandra/pull/1681]|[j8|https://app.circleci.com/pipelines/github/bereng/cassandra/682/workflows/846f8436-4c18-4ce4-95ca-e621a2626372]
[j11|https://app.circleci.com/pipelines/github/bereng/cassandra/682/workflows/dbb38461-9153-49c2-a149-19647adff094]|
|[trunk|https://github.com/apache/cassandra/pull/1664]|[j8|https://app.circleci.com/pipelines/github/bereng/cassandra/685/workflows/83581109-4037-46ae-87dd-6a17d44f1ee8]
[j11|https://app.circleci.com/pipelines/github/bereng/cassandra/685/workflows/8a813d5a-7bec-4ec6-a95f-7683c72bfe01]|
> CQLSH unicode control character list is too liberal
> ---------------------------------------------------
>
> Key: CASSANDRA-17617
> URL: https://issues.apache.org/jira/browse/CASSANDRA-17617
> Project: Cassandra
> Issue Type: Improvement
> Components: CQL/Interpreter
> Reporter: Tanuj Nayak
> Assignee: Tanuj Nayak
> Priority: Normal
> Fix For: 3.11.x, 4.0.x, 4.1-rc
>
>
> It appears that the list of escaped unicode control characters
> [here|https://github.com/apache/cassandra/blob/53a67ff2c36d90d337aba1409498de29931d4279/pylib/cqlshlib/formatting.py#L32]
> is a bit too liberal. It seems to include characters such as '1' (0x31) and
> '0' (0x30) which do not need to be escaped. It seems that the actual range
> should be 0x00 - 0x1F and 0x7F+ as corroborated [by this
> page|https://en.wikipedia.org/wiki/Unicode_control_characters].
>
> This causes unnecessary escaping and regex substitutions on the CQLSH end
> whenever common characters such as any punctuation or a 0 or a 1 appear in
> the text column of a table. One might notice that a table with a text column
> filled with 2's will take much less time to print than one with all 0's for
> this reason.
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