timsaucer opened a new issue, #1453: URL: https://github.com/apache/datafusion-python/issues/1453
## Summary Several miscellaneous scalar functions from upstream DataFusion are not exposed in datafusion-python. ## Missing Functions **Union type functions:** - [ ] `union_extract` — extracts a value from a union type by field name - [ ] `union_tag` — returns the tag (active field name) of a union type **Arrow metadata/cast functions:** - [ ] `arrow_metadata` — returns Arrow field metadata - [ ] `arrow_try_cast` — attempts to cast an expression, returning null on failure instead of erroring **Other:** - [ ] `get_field` — extracts a field from a struct by name - [ ] `version` — returns the DataFusion version string - [ ] `row` — alias for the `struct` constructor ## Upstream Reference - https://datafusion.apache.org/user-guide/sql/scalar_functions.html ## Implementation - Rust bindings: `crates/core/src/functions.rs` - Python wrappers: `python/datafusion/functions.py` > **Note:** This gap analysis was performed using an AI agent comparing upstream DataFusion v53 documentation against the current datafusion-python codebase. -- 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]
