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Posted to issues@hive.apache.org by "zhaolong (Jira)" <ji...@apache.org> on 2020/08/07 06:09:00 UTC
[jira] [Comment Edited] (HIVE-18325) Config to do case unaware
schema evolution to ORC reader.
[ https://issues.apache.org/jira/browse/HIVE-18325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17172914#comment-17172914 ]
zhaolong edited comment on HIVE-18325 at 8/7/20, 6:08 AM:
----------------------------------------------------------
In OrcFile.java,
readerOptions method add
conf.set("orc.schema.evolution.case.sensitive", "false");
can fix this problem
was (Author: fsilent):
!image-2020-08-07-14-07-04-676.png! this param can fix this problem
> 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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