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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2017/01/22 05:21:26 UTC
[jira] [Commented] (SPARK-19327) Improve the partition method when
read data from jdbc
[ https://issues.apache.org/jira/browse/SPARK-19327?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15833293#comment-15833293 ]
Apache Spark commented on SPARK-19327:
--------------------------------------
User 'djvulee' has created a pull request for this issue:
https://github.com/apache/spark/pull/16671
> Improve the partition method when read data from jdbc
> -----------------------------------------------------
>
> Key: SPARK-19327
> URL: https://issues.apache.org/jira/browse/SPARK-19327
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: DjvuLee
>
> The partition method in `jdbc` when specify the column using the equal step, this can lead to skew between partitions. The new method introduce a balance partition method base on the elements, this can avoid the skew problem.
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