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https://issues.apache.org/jira/browse/CALCITE-4633?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde resolved CALCITE-4633.
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Resolution: Not A Problem
For reasons explained above, trimming fields from a distinct UNION would change
the semantics of the query. Marking 'not a problem'. (If you know of some
specific cases where it is safe to trim fields, feel free to re-open.)
> Enable RelFieldTrimmer to trim fields on a distinct UNION
> ---------------------------------------------------------
>
> Key: CALCITE-4633
> URL: https://issues.apache.org/jira/browse/CALCITE-4633
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.26.0
> Reporter: Sean Broeder
> Assignee: Sean Broeder
> Priority: Major
>
> Should be able to push a project to trim fields on top of distinct union
> without changing results.
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