XiaoHongbo-Hope opened a new pull request, #9763: URL: https://github.com/apache/paimon/pull/9763
### Purpose PyPaimon currently exposes the physical struct when reading a `MAP<STRING, T>` stored with the shared-shredding layout. Restore the complete logical map instead. ### Changes - parse shared-shredding field metadata with `none`, `lz4`, and `zstd` dictionary compression - assemble fixed physical columns and overflow entries into the logical Arrow MAP - preserve null and empty maps and arbitrary supported value types - recover Paimon field metadata from the ORC `ARROW:schema` entry across supported PyArrow versions Selected-key projection and shared-shredding writes are intentionally out of scope. ### Tests 49 related tests passed on Python 3.12 / PyArrow 19. The new tests also passed on Python 3.6 / PyArrow 6. Java-written ORC files using all three metadata compressions were verified with both PyArrow versions. Flake8 and `git diff --check` passed. -- 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]
