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https://issues.apache.org/jira/browse/ARROW-8666?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17361229#comment-17361229
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Bryan Cutler commented on ARROW-8666:
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[~lidavidm] can this be closed then, or are there further API improvements
needed?
> [Java] DenseUnionVector has no way to set offset/validity directly
> ------------------------------------------------------------------
>
> Key: ARROW-8666
> URL: https://issues.apache.org/jira/browse/ARROW-8666
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Java
> Affects Versions: 0.17.0
> Reporter: David Li
> Priority: Major
>
> You can set the type ID manually, but you cannot set the offset or validity
> directly. Ideally, we'd have an API like Python that lets us build it
> directly from constituent vectors and the offsets/type IDs.
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