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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2016/02/23 22:13:18 UTC
[jira] [Commented] (SPARK-13306) Initial implementation for
uncorrelated scalar subquery
[ https://issues.apache.org/jira/browse/SPARK-13306?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15159658#comment-15159658 ]
Apache Spark commented on SPARK-13306:
--------------------------------------
User 'hvanhovell' has created a pull request for this issue:
https://github.com/apache/spark/pull/11329
> Initial implementation for uncorrelated scalar subquery
> -------------------------------------------------------
>
> Key: SPARK-13306
> URL: https://issues.apache.org/jira/browse/SPARK-13306
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Davies Liu
> Assignee: Davies Liu
> Fix For: 2.0.0
>
>
> 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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