support OR
- Dominant language
- Java
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Description
OR supposed to be implement in rules.
Basically when LogicalRel is generated and being converted to PhysicalRel, OR should be handled by a separate converter rule:
all conjunction clauses of OR should be converted to independent JOIN and their results are combined by UNION rel with deduplication.
Imported from Jira [BEAM-7149](https://issues.apache.org/jira/browse/BEAM-7149). Original Jira may contain additional context.
Reported by: amaliujia.
Subtask of issue #19175
Contributor guide
Research direction
Start by locating the LogicalRel-to-PhysicalRel conversion rules mentioned in the issue and read the surrounding planner code; no specific files or tests are identified. Done means OR conjunction clauses are handled by a separate converter, with independent JOIN results combined through a deduplicating UNION rel.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java, sql
- Domain
- databases
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100