You are viewing a plain text version of this content. The canonical link for it is here.
Posted to github@arrow.apache.org by "sdf-jkl (via GitHub)" <gi...@apache.org> on 2026/03/24 22:28:36 UTC
[I] [Variant] `variant_get(..., List<_>)` non-Struct support [arrow-rs]
sdf-jkl opened a new issue, #9615:
URL: https://github.com/apache/arrow-rs/issues/9615
**Is your feature request related to a problem or challenge? Please describe what you are trying to do.**
<!--
A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
(This section helps Arrow developers understand the context and *why* for this feature, in addition to the *what*)
-->
While working on #9599 @scovich and I noticed that `variant_get(..., List<Int64>)` returns a shredded List<Struct{value, typed_value:Int64}> instead of `List<Int64>`
https://github.com/apache/arrow-rs/pull/9599#discussion_r2984436071
> I believe the newly added test_variant_get_list_like_unsafe_cast_preserves_null_elements unit test confirms the wrong behavior:
Caller passes DataType::List(Arc::new(Field::new("item", DataType::Int64, true))) (= List<Int64>)
But the test expects List<Struct{value, typed_value:Int64}> (= shredded variant array)
**Describe the solution you'd like**
Make `VariantToListArrowRowBuilder` build arrays depending on the requested output type, not just shredded struct.
<!--
A clear and concise description of what you want to happen.
-->
**Describe alternatives you've considered**
<!--
A clear and concise description of any alternative solutions or features you've considered.
-->
**Additional context**
<!--
Add any other context or screenshots about the feature request here.
-->
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: github-unsubscribe@arrow.apache.org.apache.org
For queries about this service, please contact Infrastructure at:
users@infra.apache.org
Re: [I] [Variant] `variant_get(..., List<_>)` non-Struct types support [arrow-rs]
Posted by "liamzwbao (via GitHub)" <gi...@apache.org>.
liamzwbao commented on issue #9615:
URL: https://github.com/apache/arrow-rs/issues/9615#issuecomment-4158678029
This makes sense. Thanks for catching this, @sdf-jkl! I will take a look
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: github-unsubscribe@arrow.apache.org
For queries about this service, please contact Infrastructure at:
users@infra.apache.org
Re: [I] [Variant] `variant_get(..., List<_>)` non-Struct types support [arrow-rs]
Posted by "alamb (via GitHub)" <gi...@apache.org>.
alamb commented on issue #9615:
URL: https://github.com/apache/arrow-rs/issues/9615#issuecomment-4307501041
`label_issue.py` automatically added labels {'parquet-variant'} from #9599
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: github-unsubscribe@arrow.apache.org
For queries about this service, please contact Infrastructure at:
users@infra.apache.org
Re: [I] [Variant] `variant_get(..., List<_>)` non-Struct types support [arrow-rs]
Posted by "alamb (via GitHub)" <gi...@apache.org>.
alamb closed issue #9615: [Variant] `variant_get(..., List<_>)` non-Struct types support
URL: https://github.com/apache/arrow-rs/issues/9615
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: github-unsubscribe@arrow.apache.org
For queries about this service, please contact Infrastructure at:
users@infra.apache.org