[jira] [Assigned] (SPARK-14785) Support correlated scalar subquery

2016-04-30 Thread Apache Spark (JIRA) 

 [ 
https://issues.apache.org/jira/browse/SPARK-14785?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Apache Spark reassigned SPARK-14785:


Assignee: (was: Apache Spark)

> Support correlated scalar subquery
> --
>
> Key: SPARK-14785
> URL: https://issues.apache.org/jira/browse/SPARK-14785
> Project: Spark
>  Issue Type: New Feature
>Reporter: Davies Liu
>
> For example:
> {code}
> SELECT a from t where b > (select avg(c) from t2 where t.id = t2.id)
> {code}
> it could be rewritten as 
> {code}
> SELECT a FROM t JOIN (SELECT id, AVG(c) as avg_c FROM t2 GROUP by id) t3 ON 
> t3.id = t.id where b > avg_c
> {code}
> TPCDS Q92, Q81, Q6 required this
> Update: TPCDS Q1 and Q30 also require correlated scalar subquery support.



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[jira] [Assigned] (SPARK-14785) Support correlated scalar subquery

2016-04-30 Thread Apache Spark (JIRA) 

 [ 
https://issues.apache.org/jira/browse/SPARK-14785?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Apache Spark reassigned SPARK-14785:


Assignee: Apache Spark

> Support correlated scalar subquery
> --
>
> Key: SPARK-14785
> URL: https://issues.apache.org/jira/browse/SPARK-14785
> Project: Spark
>  Issue Type: New Feature
>Reporter: Davies Liu
>Assignee: Apache Spark
>
> For example:
> {code}
> SELECT a from t where b > (select avg(c) from t2 where t.id = t2.id)
> {code}
> it could be rewritten as 
> {code}
> SELECT a FROM t JOIN (SELECT id, AVG(c) as avg_c FROM t2 GROUP by id) t3 ON 
> t3.id = t.id where b > avg_c
> {code}
> TPCDS Q92, Q81, Q6 required this
> Update: TPCDS Q1 and Q30 also require correlated scalar subquery support.



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[jira] [Assigned] (SPARK-14785) Support correlated scalar subquery

2016-04-22 Thread Davies Liu (JIRA) 

 [ 
https://issues.apache.org/jira/browse/SPARK-14785?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Davies Liu reassigned SPARK-14785:
--

Assignee: Davies Liu

> Support correlated scalar subquery
> --
>
> Key: SPARK-14785
> URL: https://issues.apache.org/jira/browse/SPARK-14785
> Project: Spark
>  Issue Type: New Feature
>Reporter: Davies Liu
>Assignee: Davies Liu
>
> For example:
> SELECT a from t where b > (select c from t2 where t.id = t2.id)
> TPCDS Q92, Q81, Q6 required this



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