Mihailo Timotic created SPARK-52633:
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Summary: Deduplicate output for each `Union` child before
`DeduplicateRelations`
Key: SPARK-52633
URL: https://issues.apache.org/jira/browse/SPARK-52633
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 4.1.0
Reporter: Mihailo Timotic
Deduplicate output for each `Union` child before `DeduplicateRelations`. This
is necessary because `DeduplicateRelations` might sometimes accidentally fix
single child duplicates, but single-pass analyzer expects this algorithm to
trigger every time
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