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https://issues.apache.org/jira/browse/HIVE-4258?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13617261#comment-13617261
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Namit Jain commented on HIVE-4258:
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I agree, I end up doing some similar hack all the time
+1
> Log logical plan tree for debugging
> -----------------------------------
>
> Key: HIVE-4258
> URL: https://issues.apache.org/jira/browse/HIVE-4258
> Project: Hive
> Issue Type: Improvement
> Components: Diagnosability
> Reporter: Navis
> Assignee: Navis
> Priority: Trivial
> Attachments: HIVE-4258.D9801.1.patch
>
>
> Debugging or implementing optimizer, knowing the shape of logical plan helps
> general progress of it.
> For example,
> select count(val) from (select a.key as key, b.value as array_val from src a
> join array_valued_src b on a.key=b.key) i lateral view explode (array_val) c
> as val
> {noformat}
> TS[1]-RS[2]-JOIN[4]-SEL[5]-LVF[6]-SEL[7]-LVJ[10]-SEL[11]-GBY[12]-RS[13]-GBY[14]-SEL[15]-FS[16]
> -SEL[8]-UDTF[9]-LVJ[10]
> TS[0]-RS[3]-JOIN[4]
> {noformat}
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