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https://issues.apache.org/jira/browse/FLINK-11680?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16795835#comment-16795835
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godfrey he commented on FLINK-11680:
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related work in https://github.com/apache/flink/pull/7993
> Make query plan easier to read
> ------------------------------
>
> Key: FLINK-11680
> URL: https://issues.apache.org/jira/browse/FLINK-11680
> Project: Flink
> Issue Type: New Feature
> Components: SQL / Planner
> Reporter: godfrey he
> Assignee: godfrey he
> Priority: Major
> Fix For: 1.9.0
>
> Attachments: image-2019-02-20-20-05-06-506.png, screenshot-1.png
>
>
> The query plan generated by RelOptUtil#toString is hard to read, especially
> the query is very complex(multiple joins or unions).
> There is a query plan of tpcds q25.sql generated by RelOptUtil#toString:
> !image-2019-02-20-20-05-06-506.png!
> We can improve the utility method to make the query plan more readable, like:
> !screenshot-1.png!
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