[C++][Java] Dataset: Support reading from fixed offset of a file for Parquet format
- Dominant language
- Java
- Stars
- 94
- Forks
- 152
- Avg merge
- 3d 16h
- Merged PRs (30d)
- 11
Description
This adds property start_offset_ and length_ to FileSource and should be functional for Parquet dataset format. Supporting Java and C++ dataset API at this time.
**Reporter**: [Jin Chengcheng](https://issues.apache.org/jira/browse/ARROW-17159) / @jinchengchenghh
#### Related issues:
- [[C++][Java] Dataset: Support reading from fixed offset of a file for Parquet format](https://github.com/apache/arrow/issues/20332) (is duplicated by)
#### PRs and other links:
- [GitHub Pull Request apache/arrow#13673](https://github.com/apache/arrow/pull/13673)
- [GitHub Pull Request apache/arrow#13688](https://github.com/apache/arrow/pull/13688)
**Note**: *This issue was originally created as [ARROW-17159](https://issues.apache.org/jira/browse/ARROW-17159). Please see the [migration documentation](https://github.com/apache/arrow/issues/14542) for further details.*
Contributor guide
Research direction
Start by reviewing FileSource and the existing Parquet dataset implementations in the Java and C++ APIs, then inspect PRs #13673 and #13688 and the duplicate issue #20332. Done means fixed-offset reads using start_offset_ and length_ work for the Parquet dataset format in both APIs.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp, java
- Domain
- api, data
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 20/100