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https://issues.apache.org/jira/browse/SPARK-8377?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15557316#comment-15557316
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Xiao Li commented on SPARK-8377:
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We can use backticks when users need to enforce the case. For example, `b`
> Identifiers caseness information should be available at any time
> ----------------------------------------------------------------
>
> Key: SPARK-8377
> URL: https://issues.apache.org/jira/browse/SPARK-8377
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Santiago M. Mola
>
> Currently, we have the option of having a case sensitive catalog or not. A
> case insensitive catalog just lowercases all identifiers. However, when
> pushing down to a data source, we lose the information about if an identifier
> should be case insensitive or strictly lowercase.
> Ideally, we would be able to distinguish a case insensitive identifier from a
> case sensitive one.
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