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https://issues.apache.org/jira/browse/ORC-450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17478850#comment-17478850
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Riza Suminto commented on ORC-450:
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The related PR has been merged to main branch. This Jira can be resolved.
> [C++] Support selecting list indices without materializing list items
> ---------------------------------------------------------------------
>
> Key: ORC-450
> URL: https://issues.apache.org/jira/browse/ORC-450
> Project: ORC
> Issue Type: Improvement
> Components: C++
> Reporter: Quanlong Huang
> Priority: Major
>
> As we don't have a type id for index field of list type, if we just want to
> get the list indices, we have to select the type id of the whole array, which
> cause unneccessary materializaion on the array item.
> The offset stream is stored sperately with the content stream. We are able to
> just materialize the list indices.
> We may need new interfaces in RowReaderOptions to specifiy this.
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