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Nested Schema Projection #5148

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tustvold opened this issue Nov 29, 2023 · 1 comment · Fixed by #5149
Closed

Nested Schema Projection #5148

tustvold opened this issue Nov 29, 2023 · 1 comment · Fixed by #5149
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arrow Changes to the arrow crate enhancement Any new improvement worthy of a entry in the changelog parquet Changes to the parquet crate

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@tustvold
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tustvold commented Nov 29, 2023 •
edited

Is your feature request related to a problem or challenge? Please describe what you are trying to do.

Currently we only provide APIs for projecting root columns of an arrow schema, that is there is no easy mechanism to project parts of nested columns. This is despite both the arrow-json reader and parquet readers supporting this.

This lack of support has come up a few times recently:

I would like an API that makes it easy to perform nested projection on a schema

Describe alternatives you've considered

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@tustvold tustvold added the enhancement Any new improvement worthy of a entry in the changelog label Nov 29, 2023
@tustvold tustvold mentioned this issue Nov 29, 2023
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@alamb alamb added the parquet Changes to the parquet crate label Nov 29, 2023
tustvold added a commit that referenced this issue Nov 29, 2023
@tustvold
Support nested schema projection (#5148) (#5149)
6d4b8bb 
* Support nested schema projection

* Tweak doc

* Review feedback
@tustvold tustvold added the arrow Changes to the arrow crate label Jan 5, 2024
@tustvold
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tustvold commented Jan 5, 2024

label_issue.py automatically added labels {'arrow'} from #5149

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Support nested schema projection (#5148) tustvold/arrow-rs
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@alamb @tustvold