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Posted to issues@spark.apache.org by "Patrick Wendell (JIRA)" <ji...@apache.org> on 2015/05/14 03:07:00 UTC
[jira] [Updated] (SPARK-7303) push down project if possible when
the child is sort
[ https://issues.apache.org/jira/browse/SPARK-7303?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Patrick Wendell updated SPARK-7303:
-----------------------------------
Fix Version/s: 1.4.0
> push down project if possible when the child is sort
> ----------------------------------------------------
>
> Key: SPARK-7303
> URL: https://issues.apache.org/jira/browse/SPARK-7303
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 1.3.1
> Reporter: Fei Wang
> Fix For: 1.4.0
>
>
> Optimize the case of `project(_, sort)` , a example is:
> `select key from (select * from testData order by key) t`
> optimize it from
> ```
> == Parsed Logical Plan ==
> 'Project ['key]
> 'Subquery t
> 'Sort ['key ASC], true
> 'Project [*]
> 'UnresolvedRelation [testData], None
> == Analyzed Logical Plan ==
> Project [key#0]
> Subquery t
> Sort [key#0 ASC], true
> Project [key#0,value#1]
> Subquery testData
> LogicalRDD [key#0,value#1], MapPartitionsRDD[1]
> == Optimized Logical Plan ==
> Project [key#0]
> Sort [key#0 ASC], true
> LogicalRDD [key#0,value#1], MapPartitionsRDD[1]
> == Physical Plan ==
> Project [key#0]
> Sort [key#0 ASC], true
> Exchange (RangePartitioning [key#0 ASC], 5), []
> PhysicalRDD [key#0,value#1], MapPartitionsRDD[1]
> ```
> to
> ```
> == Parsed Logical Plan ==
> 'Project ['key]
> 'Subquery t
> 'Sort ['key ASC], true
> 'Project [*]
> 'UnresolvedRelation [testData], None
> == Analyzed Logical Plan ==
> Project [key#0]
> Subquery t
> Sort [key#0 ASC], true
> Project [key#0,value#1]
> Subquery testData
> LogicalRDD [key#0,value#1], MapPartitionsRDD[1]
> == Optimized Logical Plan ==
> Sort [key#0 ASC], true
> Project [key#0]
> LogicalRDD [key#0,value#1], MapPartitionsRDD[1]
> == Physical Plan ==
> Sort [key#0 ASC], true
> Exchange (RangePartitioning [key#0 ASC], 5), []
> Project [key#0]
> PhysicalRDD [key#0,value#1], MapPartitionsRDD[1]
> ```
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