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https://issues.apache.org/jira/browse/BEAM-7049?focusedWorklogId=346376&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-346376
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ASF GitHub Bot logged work on BEAM-7049:
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Author: ASF GitHub Bot
Created on: 20/Nov/19 00:28
Start Date: 20/Nov/19 00:28
Worklog Time Spent: 10m
Work Description: stale[bot] commented on issue #9358:
(WIP-BEAM-7049)Changes made to make a simple case of threeway union work
URL: https://github.com/apache/beam/pull/9358#issuecomment-555778972
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Issue Time Tracking
-------------------
Worklog Id: (was: 346376)
Time Spent: 1h 20m (was: 1h 10m)
> Merge multiple input to one BeamUnionRel
> ----------------------------------------
>
> Key: BEAM-7049
> URL: https://issues.apache.org/jira/browse/BEAM-7049
> Project: Beam
> Issue Type: Improvement
> Components: dsl-sql
> Reporter: Rui Wang
> Assignee: sridhar Reddy
> Priority: Major
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> BeamUnionRel assumes inputs are two and rejects more. So `a UNION b UNION c`
> will have to be created as UNION(a, UNION(b, c)) and have two shuffles. If
> BeamUnionRel can handle multiple shuffles, we will have only one shuffle
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