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Posted to issues@spark.apache.org by "Eyal Farago (JIRA)" <ji...@apache.org> on 2016/08/01 21:47:20 UTC

[jira] [Created] (SPARK-16839) CleanupAliases may leave redundant aliases at end of analysis state

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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