apache / apache/parquet-format
Add Union Logical type
- Dominant language
- Thrift
- Stars
- 2.6k
- Forks
- 508
- Avg merge
- 2d 8h
- Merged PRs (30d)
- 4
Description
Add a union type annotation for Group types that represent a Union rather than a struct.
Models like Avro or Arrow would make use of it.
**Reporter**: [Julien Le Dem](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=julienledem) / @julienledem
**Assignee**: [Julien Le Dem](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=julienledem) / @julienledem
#### Related issues:
- [Add NULL type to Bring Parquet logical types to par with Arrow](https://github.com/apache/parquet-format/issues/268) (blocks)
#### PRs and other links:
- [GitHub Pull Request #44](https://github.com/apache/parquet-format/pull/44)
- [PR](https://github.com/apache/parquet-format/pull/44)
**Note**: *This issue was originally created as [PARQUET-756](https://issues.apache.org/jira/browse/PARQUET-756). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*
Contributor guide
Research direction
Review PR #44 and related issue #268 first; no source file or test is named in this issue. Done means the Parquet format defines a union logical type annotation for Group types representing unions, with its relationship to NULL types resolved.
Written by the indexing model from the issue text.
Assessment
- Domain
- data-engineering
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 20/100