Brian Hulette created BEAM-11190:
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Summary: 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
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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