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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2016/09/14 16:22:20 UTC
[jira] [Commented] (SPARK-17536) Minor performance improvement to
JDBC batch inserts
[ https://issues.apache.org/jira/browse/SPARK-17536?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15490849#comment-15490849 ]
Apache Spark commented on SPARK-17536:
--------------------------------------
User 'blue666man' has created a pull request for this issue:
https://github.com/apache/spark/pull/15098
> Minor performance improvement to JDBC batch inserts
> ---------------------------------------------------
>
> Key: SPARK-17536
> URL: https://issues.apache.org/jira/browse/SPARK-17536
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.0.0
> Reporter: John Muller
> Priority: Trivial
> Labels: perfomance
> Original Estimate: 0.5h
> Remaining Estimate: 0.5h
>
> JDBC batch inserts currently are set to repeatedly retrieve the number of fields inside the row iterator:
> https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcUtils.scala#L598
> val numFields = rddSchema.fields.length
> This value does not change and can be set prior to the loop.
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