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https://issues.apache.org/jira/browse/HIVE-11799?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14741399#comment-14741399
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Aihua Xu commented on HIVE-11799:
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[~hagleitn] Can you help take a look at the change? You added logical explain.
Seems it won't affect that and reasonable not to print ops again for
non-logical explain out.
> The output of explain query for multiple lateral views is huge
> --------------------------------------------------------------
>
> Key: HIVE-11799
> URL: https://issues.apache.org/jira/browse/HIVE-11799
> Project: Hive
> Issue Type: Sub-task
> Components: Hive
> Affects Versions: 2.0.0
> Reporter: Aihua Xu
> Assignee: Aihua Xu
> Fix For: 2.0.0
>
> Attachments: HIVE-11799.patch
>
>
> Execute the following query
> {noformat}
> CREATE TABLE `t1`(`pattern` array<int>);
>
> explain select * from t1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1
> lateral view explode(pattern) tbl1 as col1;
> {noformat}
> After HIVE-11617 gets fixed, the explain output still takes forever since we
> are recursively printing operator info which could be an issue if the ops
> could have multiple children and parents, like lateral view case. Right now,
> if a node has multiple parents, then it including its descendants will be
> printed multiple times. We should print once and probably print just a
> reference later on.
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