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https://issues.apache.org/jira/browse/HIVE-15583?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jesus Camacho Rodriguez updated HIVE-15583:
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Attachment: HIVE-15583.01.patch
> CTAS query removes leading underscore from column names with CBO
> ----------------------------------------------------------------
>
> Key: HIVE-15583
> URL: https://issues.apache.org/jira/browse/HIVE-15583
> Project: Hive
> Issue Type: Bug
> Components: CBO
> Affects Versions: 2.2.0
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
> Priority: Minor
> Attachments: HIVE-15583.01.patch, HIVE-15583.patch
>
>
> L209 in PlanModifierForASTConv.java:
> {code:java}
> if (colAlias.startsWith("_")) {
> colAlias = colAlias.substring(1);
> colAlias = getNewColAlias(newSelAliases, colAlias);
> }
> {code}
> I would like to explore if we can just remove this limitation.
> For instance, due to this issue, when we create a table with Druid storage
> handler, we need to add an additional underscore for column names as Druid is
> expecting columns with a certain name.
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