Support a better encoding for Parquet Dictionary
- Dominant language
- Java
- Stars
- 3.1k
- Forks
- 1.6k
- Avg merge
- 3d 12h
- Merged PRs (30d)
- 33
Description
Currently Parquet is using Plain encoding for the dictionary, it should support a better encoding, such as BitPacking or DeltaBinaryPacking.
**Reporter**: [Dapeng Sun](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=dapengsun) / @sundapeng
**Note**: *This issue was originally created as [PARQUET-1060](https://issues.apache.org/jira/browse/PARQUET-1060). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*
Contributor guide
No contributing guide indexed for this repository
Research direction
Start by locating the Parquet dictionary encoding implementation and the existing Plain encoding path; no file or test is named in the issue. Compare the supported BitPacking and DeltaBinaryPacking options and determine how dictionary pages represent them. Done means a selected better encoding is supported correctly and covered by relevant tests.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java
- Domain
- data-engineering
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100