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https://issues.apache.org/jira/browse/SPARK-7972?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14566253#comment-14566253
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Apache Spark commented on SPARK-7972:
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User 'yhuai' has created a pull request for this issue:
https://github.com/apache/spark/pull/6524
> When parse window spec frame, we need to do case insensitive matches.
> ---------------------------------------------------------------------
>
> Key: SPARK-7972
> URL: https://issues.apache.org/jira/browse/SPARK-7972
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.4.0
> Reporter: Yin Huai
> Assignee: Yin Huai
>
> For window frame, PRECEDING, FOLLOWING, and CURRENT ROW do not have
> pre-defined tokens. So, Hive Parser returns the user input directly (e.g.
> {{preCeDING}}). We need to do case insensitive matches in {{HiveQl.scala}}..
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