crepererum opened a new pull request, #4437:
URL: https://github.com/apache/arrow-datafusion/pull/4437
# Which issue does this PR close?
Closes #4435.
# Rationale for this change
It would be nice to get the typed "original" error, even when it is wrapped
into a chain of `ExternalError`, `ArrowError`, `Arc` etc. The original error
could be used to generate HTTP status codes in certain situations, e.g.
"resource exhausted".
# What changes are included in this PR?
```rust
impl DataFusionError {
/// Get underlying error.
///
/// This may be the same as `self`.
pub fn find_root(&self) -> &Self {...}
}
```
# Are these changes tested?
- `test_find_root_error`
# Are there any user-facing changes?
New method for `DataFusionError`.
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