segment has no compress for complex type column
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Improvement
- Dominant language
- Java
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Description
Please provide a detailed title (e.g. "Broker crashes when using TopN query with Bound filter" instead of just "Broker crashes").
### Affected Version
26.0.0
### Description
segment has no compress for complex type column, when complex column are sparse with many null values, a lot of space is wasted
Contributor guide
Research direction
The issue names no files, tests, or entry points. Start by reproducing the space waste with sparse complex-type columns on Apache Druid 26.0.0, then trace how segments encode and compress those columns. Done means a defined and tested compression approach that reduces wasted space without breaking complex-column reads.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java
- Domain
- databases
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100