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https://issues.apache.org/jira/browse/CALCITE-4787?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17418748#comment-17418748
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Julian Hyde commented on CALCITE-4787:
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The initial PR is just a proof-of-concept. It seems that the real PR will touch
hundreds of files, and also require dependent projects (who have written their
own rules) to make changes. So this will be a very breaking change.
> Evaluate use of Immutables instead of ImmutableBeans
> ----------------------------------------------------
>
> Key: CALCITE-4787
> URL: https://issues.apache.org/jira/browse/CALCITE-4787
> Project: Calcite
> Issue Type: Improvement
> Reporter: Jacques Nadeau
> Assignee: Jacques Nadeau
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
> In the creation of CALCITE-3328, [Immutables|https://immutables.github.io/]
> was discussed as an alternative to a custom implementation. This ticket is to
> evaluate the impact to the codebase of changing. Ideally, introduction of
> immutables would both add flexibility and reduce the amount of code
> associated with these classes.
> Immutables works via annotation processor which means that it is should be
> relatively seamless to build systems and IDEs.
> The switch would also make it easier to work with these objects types in the
> context of aot compilation tools like GraalVM.
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