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https://issues.apache.org/jira/browse/HIVE-9528?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14301429#comment-14301429
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Yongzhi Chen commented on HIVE-9528:
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Is this jira? https://issues.apache.org/jira/browse/HIVE-2723
Thanks
> SemanticException: Ambiguous column reference
> ---------------------------------------------
>
> Key: HIVE-9528
> URL: https://issues.apache.org/jira/browse/HIVE-9528
> Project: Hive
> Issue Type: Bug
> Affects Versions: 0.14.0
> Reporter: Yongzhi Chen
> Assignee: Navis
>
> When running the following query:
> {code}
> SELECT if( COUNT(*) = 0, 'true', 'false' ) as RESULT FROM ( select * from
> sim a join sim2 b on a.simstr=b.simstr) app
> Error: Error while compiling statement: FAILED: SemanticException [Error
> 10007]: Ambiguous column reference simstr in app (state=42000,code=10007)
> {code}
> This query works fine in hive 0.10
> In the apache trunk, following workaround will work:
> {code}
> SELECT if(COUNT(*) = 0, 'true', 'false') as RESULT FROM (select a.* from sim
> a join sim2 b on a.simstr=b.simstr) app;
> {code}
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