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https://issues.apache.org/jira/browse/CASSANDRA-16439?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17283345#comment-17283345
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David Capwell edited comment on CASSANDRA-16439 at 2/11/21, 8:21 PM:
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was (Author: dcapwell):
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> Reduce new reserved keywords introduced since 3.0
> -------------------------------------------------
>
> Key: CASSANDRA-16439
> URL: https://issues.apache.org/jira/browse/CASSANDRA-16439
> Project: Cassandra
> Issue Type: Improvement
> Components: CQL/Syntax
> Reporter: Jon Meredith
> Assignee: Jon Meredith
> Priority: Normal
> Fix For: 4.0-beta
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> Building on CASSANDRA-16398, for users upgrading from 3.0 to 4.0 there have
> been a few new reserved keywords added that can cause problems with schema
> changes and queries in existing applications. Reducing the number of new
> reserved words makes upgrades easier for users.
> {code:java}
> K_DEFAULT
> K_MBEAN
> K_MBEANS
> K_NEGATIVE_INFINITY
> K_NEGATIVE_NAN
> K_POSITIVE_INFINITY
> K_POSITIVE_NAN
> K_REPLACE
> K_SCHEMA
> K_UNSET
> {code}
> I think they can all be removed from the ReservedWords lists (where present)
> and added to {{basic_unreserved_keyword}} with the exception of the {\{NAN}}
> and \{{INFINITY}} as there could be ambiguity between a selected field and a
> nan/infinity literal.
> To validate I've written a test that extracts the keywords from the parser
> tokens and verifies that any non-reserved keywords can be used as table and
> column names for regular tables and materialized views. It isn't exhaustive
> but provides a good sense check.
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