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https://issues.apache.org/jira/browse/BEAM-11190?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Brian Hulette updated BEAM-11190:
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Status: Open (was: Triage Needed)
> grouping on categorical columns requires Singleton partitioning
> ---------------------------------------------------------------
>
> Key: BEAM-11190
> URL: https://issues.apache.org/jira/browse/BEAM-11190
> Project: Beam
> Issue Type: Bug
> Components: sdk-py-core
> Reporter: Brian Hulette
> Priority: P2
>
> groupby with observed=False (the default) requires aggregating in the
> Singleton partition since it would otherwise produce results with every index
> value within every partition.
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