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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2019/03/15 06:48:04 UTC

[GitHub] [spark] deshanxiao opened a new pull request #24102: [SPARK-27171][SQL] Support Full-Partiton limit in the first scan

deshanxiao opened a new pull request #24102: [SPARK-27171][SQL] Support Full-Partiton limit in the first scan
URL: https://github.com/apache/spark/pull/24102
 
 
   ## What changes were proposed in this pull request?
   
   SparkPlan#executeTake must pick element starting with one partition. Sometimes it will be slow for some query. Although, Spark is better at batch query. It's not bad to add a switch to allow user search all partitons for the first time in limit.
   
   ## How was this patch tested?
   
   Exist tests.
   

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