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https://issues.apache.org/jira/browse/SPARK-15873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15324408#comment-15324408
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Cheng Wei commented on SPARK-15873:
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In the original JdbcRDD, it only supports Long bound type and does not leave
room for extension. In the pull request, the implementation support the
original Long type plus String type, which is also a commonly used type for
primary key. The JdbcPartition trait allows for potential extension as well.
> JdbcRDD to support more bound types other than Long and allow multiple bound
> occurrence for subqueries.
> -------------------------------------------------------------------------------------------------------
>
> Key: SPARK-15873
> URL: https://issues.apache.org/jira/browse/SPARK-15873
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Reporter: Cheng Wei
> Priority: Minor
>
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