Paddy Horan created ARROW-3540:
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Summary: [Rust] Incorporate BooleanArray into PrimitiveArray
Key: ARROW-3540
URL: https://issues.apache.org/jira/browse/ARROW-3540
Project: Apache Arrow
Issue Type: New Feature
Components: Rust
Reporter: Paddy Horan
Assignee: Paddy Horan
Currently we have a specific implementation for `BooleanArray` (bit-packing),
but due to the `ArrowPrimitiveType` trait which we use as a trait bound in many
places `PrimitiveArray<bool>` is still a valid type. `make_array` actually
uses `PrimitiveArray<bool>` which may be a bug but would be fixed by this issue
anyway.
I propose move the implementation of `BooleanArray` into
`PrimitiveArray<bool>`, this would allow us to use the `ArrayPrimitiveType`
trait as a bound more consistently. i.e. `PrimitiveArrayBuilder<T>` could
return `PrimitiveArray<T>` instead of having a separate `BooleanArrayBuilder`.
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