[Java][Dataset] FileSystemDataset: Support reading dictionary arrays
Open
Type: enhancement
- Dominant language
- Java
- Stars
- 94
- Forks
- 152
- Avg merge
- 3d 16h
- Merged PRs (30d)
- 11
Description
**Reporter**: [Hongze Zhang](https://issues.apache.org/jira/browse/ARROW-12481) / @zhztheplayer
**Note**: *This issue was originally created as [ARROW-12481](https://issues.apache.org/jira/browse/ARROW-12481). Please see the [migration documentation](https://github.com/apache/arrow/issues/14542) for further details.*
Contributor guide
Research direction
Start by locating the Java FileSystemDataset implementation and its existing array-reading path. Compare how dictionary arrays are represented and handled elsewhere in the repository, then identify the relevant tests or add coverage for reading them. Done means FileSystemDataset can successfully read dictionary arrays without regressing existing dataset reads.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java
- Domain
- data
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100