Eyal Farago created SPARK-16839:
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Summary: CleanupAliases may leave redundant aliases at end of
analysis state
Key: SPARK-16839
URL: https://issues.apache.org/jira/browse/SPARK-16839
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 2.0.0, 1.6.1
Reporter: Eyal Farago
Priority: Minor
[SPARK-9634] [SPARK-9323] [SQL] introduced CleanupReferences which removes
unnecessary Aliases while keeping required ones such as top level Projection
and struct attributes. this mechanism is implemented by maintaining a boolean
flag during a top-down expression transformation, I found a case where this
mechanism leaves redundant aliases in the tree (within a right sibling of a
create_struct node).
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