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https://issues.apache.org/jira/browse/CASSANDRA-21509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18095610#comment-18095610
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Dmitry Konstantinov commented on CASSANDRA-21509:
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+1
> 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
> Components: Tool/nodetool
> Reporter: Maxim Muzafarov
> Assignee: Maxim Muzafarov
> Priority: Normal
> Fix For: 7.x
>
>
> 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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