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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2016/02/12 23:48:18 UTC

[jira] [Commented] (SPARK-13306) Uncorrelated scalar subquery

    [ https://issues.apache.org/jira/browse/SPARK-13306?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15145476#comment-15145476 ] 

Apache Spark commented on SPARK-13306:
--------------------------------------

User 'davies' has created a pull request for this issue:
https://github.com/apache/spark/pull/11190

> Uncorrelated scalar subquery
> ----------------------------
>
>                 Key: SPARK-13306
>                 URL: https://issues.apache.org/jira/browse/SPARK-13306
>             Project: Spark
>          Issue Type: New Feature
>            Reporter: Davies Liu
>            Assignee: Davies Liu
>
> A scalar subquery is a subquery that only generate single row and single column, could be used as part of expression.
> Uncorrelated scalar subquery means it does not has a reference to external table.



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