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https://issues.apache.org/jira/browse/HIVE-18325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17173592#comment-17173592
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Jiayi Liu commented on HIVE-18325:
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[~fsilent] I think the problem is that OrcInputFormat should pass conf to orc
reader options, such as orc.schema.evolution.case.sensitive = false. Patch in
HIVE-20126 can solve this problem, and then this JIRA can be solved by set
orc.schema.evolution.case.sensitive=false in hive cli.
> 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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