[jira] [Commented] (CASSANDRA-21509) Enforcing uniqueness of paramLabel across command options

["Maxim Muzafarov (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-21509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18095604#comment-18095604 ] 

Maxim Muzafarov commented on CASSANDRA-21509:
---------------------------------------------

https://pre-ci.cassandra.apache.org/job/cassandra/625/

> Enforcing uniqueness of paramLabel across command options
> ---------------------------------------------------------
>
>                 Key: CASSANDRA-21509
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-21509
>             Project: Apache Cassandra
>          Issue Type: Task
>            Reporter: Maxim Muzafarov
>            Assignee: Maxim Muzafarov
>            Priority: Normal
>
> On trunk, paramLabel is display-only: duplicate labels cause no parsing or behavioral problem, only ambiguous help output which some time confuses a command usage.
> The uniqueness rule such as "paramLabels must be unique within a command across options, aliases, and positionals is a new convention this ticket introduces, not an existing invariant being violated. Its purpose is forward-looking: CEP-38 turns these labels into wire keys for cql commands. Enforcing the convention on trunk now means no new commands can introduce collisions.



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