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https://issues.apache.org/jira/browse/HIVE-17333?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16278750#comment-16278750
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Naveen Gangam commented on HIVE-17333:
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Test failures are unrelated to the change.
> Schema changes in HIVE-12274 for Oracle may not work for upgrade
> ----------------------------------------------------------------
>
> Key: HIVE-17333
> URL: https://issues.apache.org/jira/browse/HIVE-17333
> Project: Hive
> Issue Type: Bug
> Components: Metastore
> Affects Versions: 3.0.0
> Reporter: Naveen Gangam
> Assignee: Naveen Gangam
> Attachments: HIVE-17333.patch
>
>
> According to
> https://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:1770086700346491686
> (reported in HIVE-12274)
> The alter table command to change the column datatype from {{VARCHAR}} to
> {{CLOB}} may not work. So the correct way to accomplish this is to add a new
> temp column, copy the value from the current column, drop the current column
> and rename the new column to old column.
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