auroflow opened a new pull request, #28934: URL: https://github.com/apache/flink/pull/28934
## What is the purpose of the change This pull request completes the data creation and conversion APIs for the PyFlink DataFrame API described in FLINK-40190. It adds creation from pandas DataFrames, PyArrow tables, PyFlink Tables, dictionaries, records, and integer ranges. It also supports conversion back to Table and pandas, explicit column names, and event-time watermarks where applicable. ## Brief change log - Add `from_pandas()`, `from_arrow()`, `from_table()`, and `range()`, and complete the existing `from_dict()` and `from_records()` creators. - Add `DataFrame.to_table()` and `DataFrame.to_pandas()`. ## Verifying this change This change added tests and can be verified as follows: - Added plain unit tests for schema and watermark validation, record normalization, range behavior, Arrow batch splitting, and empty Arrow streams. - Added planner-backed tests for pandas and Arrow schema inference, positional renaming, typed empty inputs, watermark metadata, and Table identity. - Added wrapper tests for `to_table()` and `to_pandas()`. - Added an integration smoke test covering `from_arrow()` → DataFrame transformation → `to_pandas()`. ## Does this pull request potentially affect one of the following parts: - Dependencies (does it add or upgrade a dependency): no - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: yes - The serializers: yes — Python in-memory and Arrow source serialization only; no state or persisted serialization format changes - The runtime per-record code paths (performance sensitive): no - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: no - The S3 file system connector: no ## Documentation - Does this pull request introduce a new feature? yes - If yes, how is the feature documented? PyDocs and public API docstrings --- ##### Was generative AI tooling used to co-author this PR? - [X] Yes (please specify the tool below) Generated-by: Codex (GPT-5) -- 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]
