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https://issues.apache.org/jira/browse/SPARK-16983?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15414398#comment-15414398
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Apache Spark commented on SPARK-16983:
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User 'dongjoon-hyun' has created a pull request for this issue:
https://github.com/apache/spark/pull/14571
> Add `prettyName` to row_number, dense_rank, percent_rank, cume_dist
> -------------------------------------------------------------------
>
> Key: SPARK-16983
> URL: https://issues.apache.org/jira/browse/SPARK-16983
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Dongjoon Hyun
> Priority: Minor
>
> Currently, two-word window functions like `row_number`, `dense_rank`,
> `percent_rank`, and `cume_dist` are expressed without `_` in error messages.
> We had better show the correct names.
> **Before**
> {code}
> scala> sql("select row_number()").show
> java.lang.UnsupportedOperationException: Cannot evaluate expression:
> rownumber()
> {code}
> **After**
> {code}
> scala> sql("select row_number()").show
> java.lang.UnsupportedOperationException: Cannot evaluate expression:
> row_number()
> {code}
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