[jira] [Commented] (SPARK-16351) Avoid record-per type dispatch in JSON when writing

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

    [ https://issues.apache.org/jira/browse/SPARK-16351?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15360162#comment-15360162 ] 

Apache Spark commented on SPARK-16351:
--------------------------------------

User 'HyukjinKwon' has created a pull request for this issue:
https://github.com/apache/spark/pull/14028

> Avoid record-per type dispatch in JSON when writing
> ---------------------------------------------------
>
>                 Key: SPARK-16351
>                 URL: https://issues.apache.org/jira/browse/SPARK-16351
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 2.0.0
>            Reporter: Hyukjin Kwon
>
> Currently, {{JacksonGenerator.apply}} is doing type-based dispatch for each row to write appropriate values.
> It might not have to be done like this because the schema of {{DataFrame}} is already there. 
> So, appropriate writers can be created first according to the schema, and then apply them to each row. This approach is similar with {{CatalystWriteSupport}}.



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