Vladimir Golubev created SPARK-51385:
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Summary: Normalize out projection added in DeduplicateRelations
for union child output deduplication
Key: SPARK-51385
URL: https://issues.apache.org/jira/browse/SPARK-51385
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 4.1.0
Reporter: Vladimir Golubev
This is a legacy way to deduplicate relations (just cover the duplicates with
new Aliases). The single-pass Analyzer does not produce it, because we
correctly assign expression IDs in single-pass.
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