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https://issues.apache.org/jira/browse/HIVE-1184?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12837476#action_12837476
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Zheng Shao commented on HIVE-1184:
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The explanation looks good to me, but I am not convinced the solution will
solve the problem.
When processing "concat(value, concat(value))". we will set "error" when
processing the first "value", then overwrite the "error" when processing the
second "value", correct?
I think the "error" should be part of the "return value" of the "process"
function, instead of a global field in the "context".
Does that make sense?
> Expression Not In Group By Key error is sometimes masked
> --------------------------------------------------------
>
> Key: HIVE-1184
> URL: https://issues.apache.org/jira/browse/HIVE-1184
> Project: Hadoop Hive
> Issue Type: Bug
> Affects Versions: 0.6.0
> Reporter: Paul Yang
> Assignee: Paul Yang
> Attachments: HIVE-1184.1.patch
>
>
> Depending on the order of expressions, the error message for a expression not
> in group key is not displayed; instead it is null.
> {code}
> hive> select concat(value, concat(value)) from src group by concat(value);
> FAILED: Error in semantic analysis: null
> hive> select concat(concat(value), value) from src group by concat(value);
> FAILED: Error in semantic analysis: line 1:29 Expression Not In Group By Key
> value
> {code}
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