[jira] [Commented] (SPARK-23185) Make the configuration "spark.default.parallelism" can be changed on each SQL session to decrease empty files

["Apache Spark (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-23185?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16335346#comment-16335346 ] 

Apache Spark commented on SPARK-23185:
--------------------------------------

User 'lvdongr' has created a pull request for this issue:
https://github.com/apache/spark/pull/20356

> Make the configuration "spark.default.parallelism" can be changed on each SQL session to decrease empty files
> -------------------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-23185
>                 URL: https://issues.apache.org/jira/browse/SPARK-23185
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.2.1
>            Reporter: LvDongrong
>            Priority: Minor
>
> When execute "insert into ... values ...", many empty files will be generated.We can change the configuration "spark.default.parallelism" to decrease the number of empty files.But there are many occasions that we want to chang the configuration during each session so as not to influence other sql sentences, like we may use thrift server to excute many sql sentences on a SQL session.



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