kosiew opened a new issue, #17066:
URL: https://github.com/apache/datafusion/issues/17066
**Summary:**
To simplify the developer experience for downstream users of DataFusion and
promote API consistency, we propose re-exporting the `object_store` crate from
DataFusion, similar to the existing re-export of the `arrow` crate.
**Problem Statement:**
Currently, downstream crates that rely on `DataFusionError::ObjectStore` (or
other exposed types from the `object_store` crate) must manually add
`object_store` to their own `Cargo.toml`. This introduces unnecessary friction
and potential for version mismatches, since `object_store` is already a
transitive dependency of DataFusion.
**Justification:**
* `object_store::Error` is wrapped directly in
`DataFusionError::ObjectStore`, making `object_store` effectively part of
DataFusion's public API.
* Downstream crates often need to import types such as `ObjectStoreError`,
`ObjectStoreUrl`, etc.
* Re-exporting the crate would allow users to write:
```rust
use datafusion::object_store::ObjectStoreError;
```
instead of having to explicitly add and manage `object_store` as a
separate dependency.
**Proposed Solution:**
In `datafusion/common/src/lib.rs`, add:
```rust
/// Reexport object_store crate
pub use object_store;
```
**Benefits:**
* Reduces friction for DataFusion users
* Improves discoverability and consistency of the public API
* Aligns with existing pattern used for `arrow` crate
**Alternatives Considered:**
* Documenting that users must manually add `object_store` — this adds burden
on users and goes against the ergonomics DataFusion aims to provide.
Proposed
[here](https://github.com/apache/datafusion/issues/16805#issuecomment-3141407372)
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