[jira] [Commented] (SPARK-20292) string representation of TreeNode is messy

["Wenchen Fan (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-20292?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15964073#comment-15964073 ] 

Wenchen Fan commented on SPARK-20292:
-------------------------------------

cc [~viirya] [~smilegator]

> string representation of TreeNode is messy
> ------------------------------------------
>
>                 Key: SPARK-20292
>                 URL: https://issues.apache.org/jira/browse/SPARK-20292
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 2.2.0
>            Reporter: Wenchen Fan
>
> Currently we have a lot of string representations for QueryPlan/Expression: toString, simpleString, verboseString, treeString, sql, etc.
> The logic between them is not very clear and as a result, {{Expression.treeString}} is mostly unreadable as it contains a lot duplicated information.
> We should clean it up



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