Neville Dipale created ARROW-11061:
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Summary: [Rust] Validate array properties against schema
Key: ARROW-11061
URL: https://issues.apache.org/jira/browse/ARROW-11061
Project: Apache Arrow
Issue Type: Improvement
Reporter: Neville Dipale
We have a problem when it comes to nested arrays, where one could create a
<list[null]<primitive[non-null]>> where the array fields can't be null, but the
list can have null slots.
This creates a lot of work when working with such nested arrays, because we
have to create work-arounds to account for this, and take unnecessarily slower
paths.
I propose that we prevent this problem at the source, by:
* checking that a batch can't be created with arrays that have incompatible
null contracts
* preventing list and struct children from being non-null if any descendant of
such children are null (might be less of an issue for structs)
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