[jira] [Assigned] (SPARK-17289) Sort based partial aggregation breaks due to SPARK-12978

2016-08-29 Thread Apache Spark (JIRA) 

 [ 
https://issues.apache.org/jira/browse/SPARK-17289?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Apache Spark reassigned SPARK-17289:


Assignee: (was: Apache Spark)

> Sort based partial aggregation breaks due to SPARK-12978
> 
>
> Key: SPARK-17289
> URL: https://issues.apache.org/jira/browse/SPARK-17289
> Project: Spark
>  Issue Type: Bug
>Reporter: Sean Zhong
>Priority: Blocker
>
> For the following query:
> {code}
> val df2 = (0 to 1000).map(x => (x % 2, x.toString)).toDF("a", 
> "b").createOrReplaceTempView("t2")
> spark.sql("select max(b) from t2 group by a").explain(true)
> {code}
> Now, the SortAggregator won't insert Sort operator before partial 
> aggregation, this will break sort-based partial aggregation.
> {code}
> == Physical Plan ==
> SortAggregate(key=[a#5], functions=[max(b#6)], output=[max(b)#17])
> +- *Sort [a#5 ASC], false, 0
>+- Exchange hashpartitioning(a#5, 200)
>   +- SortAggregate(key=[a#5], functions=[partial_max(b#6)], output=[a#5, 
> max#19])
>  +- LocalTableScan [a#5, b#6]
> {code}
> In Spark 2.0 branch, the plan is:
> {code}
> == Physical Plan ==
> SortAggregate(key=[a#5], functions=[max(b#6)], output=[max(b)#17])
> +- *Sort [a#5 ASC], false, 0
>+- Exchange hashpartitioning(a#5, 200)
>   +- SortAggregate(key=[a#5], functions=[partial_max(b#6)], output=[a#5, 
> max#19])
>  +- *Sort [a#5 ASC], false, 0
> +- LocalTableScan [a#5, b#6]
> {code}
> This is related to SPARK-12978



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[jira] [Assigned] (SPARK-17289) Sort based partial aggregation breaks due to SPARK-12978

2016-08-29 Thread Apache Spark (JIRA) 

 [ 
https://issues.apache.org/jira/browse/SPARK-17289?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Apache Spark reassigned SPARK-17289:


Assignee: Apache Spark

> Sort based partial aggregation breaks due to SPARK-12978
> 
>
> Key: SPARK-17289
> URL: https://issues.apache.org/jira/browse/SPARK-17289
> Project: Spark
>  Issue Type: Bug
>Reporter: Sean Zhong
>Assignee: Apache Spark
>Priority: Blocker
>
> For the following query:
> {code}
> val df2 = (0 to 1000).map(x => (x % 2, x.toString)).toDF("a", 
> "b").createOrReplaceTempView("t2")
> spark.sql("select max(b) from t2 group by a").explain(true)
> {code}
> Now, the SortAggregator won't insert Sort operator before partial 
> aggregation, this will break sort-based partial aggregation.
> {code}
> == Physical Plan ==
> SortAggregate(key=[a#5], functions=[max(b#6)], output=[max(b)#17])
> +- *Sort [a#5 ASC], false, 0
>+- Exchange hashpartitioning(a#5, 200)
>   +- SortAggregate(key=[a#5], functions=[partial_max(b#6)], output=[a#5, 
> max#19])
>  +- LocalTableScan [a#5, b#6]
> {code}
> In Spark 2.0 branch, the plan is:
> {code}
> == Physical Plan ==
> SortAggregate(key=[a#5], functions=[max(b#6)], output=[max(b)#17])
> +- *Sort [a#5 ASC], false, 0
>+- Exchange hashpartitioning(a#5, 200)
>   +- SortAggregate(key=[a#5], functions=[partial_max(b#6)], output=[a#5, 
> max#19])
>  +- *Sort [a#5 ASC], false, 0
> +- LocalTableScan [a#5, b#6]
> {code}
> This is related to SPARK-12978



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