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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2019/05/24 23:47:40 UTC

[GitHub] [spark] maryannxue opened a new pull request #24706: [SPARK-23128][SQL] A new approach to do adaptive execution in Spark SQL

maryannxue opened a new pull request #24706: [SPARK-23128][SQL] A new approach to do adaptive execution in Spark SQL
URL: https://github.com/apache/spark/pull/24706
 
 
   ## What changes were proposed in this pull request?
   
   Implemented a new SparkPlan that executes the query adaptively. It splits the query plan into independent stages and executes them in order according to their dependencies. The query stage materializes its output at the end. When one stage completes, the data statistics of the materialized output will be used to optimize the remainder of the query.
   
   ## How was this patch tested?
   
   Added new UT.
   

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