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https://issues.apache.org/jira/browse/HIVE-18325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17175952#comment-17175952
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zhaolong commented on HIVE-18325:
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@ [~liujiayi771]  Yes, you are right.

> Config to do case unaware schema evolution to ORC reader.
> ---------------------------------------------------------
>
>                 Key: HIVE-18325
>                 URL: https://issues.apache.org/jira/browse/HIVE-18325
>             Project: Hive
>          Issue Type: Bug
>          Components: ORC
>            Reporter: piyush mukati
>            Priority: Critical
>
> in case of orc data reader schema passed by hive are all small cases and if 
> the column name stored in the file has any uppercase, it will return null 
> values for those columns even if the data is present in the file. 
> Column name matching while schema evolution should be case unaware. 
> we need to pass config for same from hive. the 
> config(orc.schema.evolution.case.sensitive) in orc will be exposed by 
> https://issues.apache.org/jira/browse/ORC-264 
>  



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