sdf-jkl opened a new pull request, #26822: URL: https://github.com/apache/datafusion/pull/26822
## Which issue does this PR close? Closes #21144. Follows #21291. ## Rationale for this change Add `arrow.parquet.variant` to DataFusion's canonical extension type registry, following the thin wrappers used for JSON and other canonical types. **Draft: waiting on moving Arrow's `VariantType` from `parquet-variant-compute` into `parquet-variant`, and adopting an Arrow release containing that move.** The current dependency pulls in the compute and JSON crates just to register the extension. Before merging, this PR should depend only on `parquet-variant` for that type. ## What changes are included in this PR? Add `DFVariant` and its canonical registration. The wrapper retains the storage datatype and delegates validation and metadata handling to Arrow's `VariantType`. Values use ordinary storage-type formatting. Arrow's incomplete storage-field validation is tracked separately in https://github.com/apache/arrow-rs/issues/11938. ## What is the testing strategy for this PR? No new unit tests for the thin delegation wrapper, consistent with the unformatted extensions in #21291. Formatting, strict workspace Clippy (`--all-targets --all-features`), `cargo check -p datafusion-common -p datafusion-expr --offline`, and all 1,471 core integration tests passed. The required extended workspace run stopped after one sort memory-limit failure (154 extended tests passed); that test passed when rerun alone. Later workspace test binaries did not run. ## Are there any user-facing changes? Yes. The canonical registry recognizes `arrow.parquet.variant`, and `DFVariant` is available through `datafusion_common::types`. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
