HaoYang670 opened a new issue, #1643:
URL: https://github.com/apache/arrow-rs/issues/1643
**Is your feature request related to a problem or challenge? Please describe
what you are trying to do.**
There is no test or example covering `UnionArray::from(data: ArrayData)`. We
need to add some.
```rust
impl From<ArrayData> for UnionArray {
fn from(data: ArrayData) -> Self {
let mut boxed_fields = vec![];
for cd in data.child_data() {
boxed_fields.push(make_array(cd.clone()));
}
Self { data, boxed_fields }
}
}
```
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