extend join-library to support 3+ PCollections
Open
extensions
improvement
java
join-library
P3
- Dominant language
- Java
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Description
`join.class` in join-library can handle two source PCollections, to perform inner/left_outer/right_outer join.
Extend the capability to handle more upstream PCollections.
Imported from Jira [BEAM-1987](https://issues.apache.org/jira/browse/BEAM-1987). Original Jira may contain additional context.
Reported by: mingmxu.
Contributor guide
Research direction
Start with `join.class` in the join-library and review the original Jira issue BEAM-1987 for additional context. Determine the existing two-PCollection inner, left_outer, and right_outer behavior, then define what supporting three or more upstream PCollections should mean and verify that capability across the supported join types.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java
- Domain
- data, distributed-systems
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 30/100