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https://issues.apache.org/jira/browse/SPARK-19327?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15833293#comment-15833293
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Apache Spark commented on SPARK-19327:
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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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