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Posted to issues@beam.apache.org by "Beam JIRA Bot (Jira)" <ji...@apache.org> on 2020/08/10 17:08:19 UTC
[jira] [Updated] (BEAM-7049) Merge multiple input to one
BeamUnionRel
[ https://issues.apache.org/jira/browse/BEAM-7049?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Beam JIRA Bot updated BEAM-7049:
--------------------------------
Labels: stale-P2 (was: )
> 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
> Priority: P2
> Labels: stale-P2
> Time Spent: 1.5h
> 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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