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https://issues.apache.org/jira/browse/ARROW-15357?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Li updated ARROW-15357:
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Labels: query-engine (was: )
> [C++] Directly support nested field refs in exec plan
> -----------------------------------------------------
>
> Key: ARROW-15357
> URL: https://issues.apache.org/jira/browse/ARROW-15357
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: David Li
> Priority: Major
> Labels: query-engine
>
> ARROW-14658 added support for nested field refs, but aggregations, joins,
> etc. cannot directly use them (you must first project, then aggregate). The
> node implementations resolve a field ref into a field path, but then throw
> away all but the first index, and so they end up referencing the wrong field
> (the top-level field instead of the nested one). To implement this, we should
> take care we don't slow down the common case of no nested field refs.
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