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https://issues.apache.org/jira/browse/SPARK-5907?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Liang-Chi Hsieh closed SPARK-5907.
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Resolution: Duplicate
> Selected column from DataFrame should not re-analyze logical plan
> -----------------------------------------------------------------
>
> Key: SPARK-5907
> URL: https://issues.apache.org/jira/browse/SPARK-5907
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Liang-Chi Hsieh
>
> Currently, selecting a column from DataFrame wraps the original logical plan
> with a Project. As the column is used, the logical plan will be analyzed
> again. For some query plan, re-analyzing would side-effect that increases
> expression id. So when accessing the column, column's expr and its analyzed
> plan will point to different expressions.
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