fenfeng9 opened a new pull request, #48939:
URL: https://github.com/apache/arrow/pull/48939
### Rationale for this change
`FileReader::ReadTable` previously returned `Status` and required callers to
pass an `out` parameter.
### What changes are included in this PR?
Introduce `Result<std::shared_ptr<Table>>` returning API to allow clearer
error propagation:
- Add new Result-returning `ReadTable()` methods
- Deprecate the old Status versions
- Migrate all callers to use the new API
### Are these changes tested?
Yes.
### Are there any user-facing changes?
Yes.
Status version FileReader::ReadTable has been deprecated.
```cpp
virtual ::arrow::Status ReadTable(std::shared_ptr<::arrow::Table>* out);
virtual ::arrow::Status ReadTable(const std::vector<int>& column_indices,
std::shared_ptr<::arrow::Table>* out);
```
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