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https://issues.apache.org/jira/browse/HIVE-415?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12699054#action_12699054
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Namit Jain commented on HIVE-415:
---------------------------------
The output files look good, but as Raghu said, can you add a test with lots of
unions.
> Long queries does not parse in Hive
> -----------------------------------
>
> Key: HIVE-415
> URL: https://issues.apache.org/jira/browse/HIVE-415
> Project: Hadoop Hive
> Issue Type: Bug
> Components: Query Processor
> Affects Versions: 0.3.0, 0.4.0
> Reporter: Zheng Shao
> Assignee: Zheng Shao
> Priority: Critical
> Attachments: HIVE-415.1.patch, HIVE-415.2.patch
>
>
> A query like this won't parse, because the Hive grammar allows backtracking:
> {code}
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable UNION ALL
> select 1 from mytable;
> {code}
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