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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2023/02/03 11:10:00 UTC
[jira] [Assigned] (SPARK-42335) Add a legacy config for restoring writer's comment option behavior in CSV dataSource
[ https://issues.apache.org/jira/browse/SPARK-42335?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-42335:
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Assignee: (was: Apache Spark)
> Add a legacy config for restoring writer's comment option behavior in CSV dataSource
> ------------------------------------------------------------------------------------
>
> Key: SPARK-42335
> URL: https://issues.apache.org/jira/browse/SPARK-42335
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.0.0, 3.1.0, 3.2.0, 3.3.0
> Reporter: Wei Guo
> Priority: Minor
> Fix For: 3.4.0
>
> Attachments: image-2023-02-03-18-56-01-596.png, image-2023-02-03-18-56-10-083.png
>
>
> In PR [https://github.com/apache/spark/pull/29516], in order to fix some bugs, univocity-parsers used by CSV dataSource was upgraded from 2.8.3 to 2.9.0, it also involved a new feature of univocity-parsers that quoting values of the first column that start with the comment character. It made a breaking for users downstream that handing a whole row as input.
>
> For codes:
> {code:java}
> Seq(("#abc", 1)).toDF.write.csv("/Users/guowei/comment_test") {code}
> Before Spark 3.0，the content of output CSV files is shown as:
> !image-2023-02-03-18-56-01-596.png!
> After this change, the content is shown as:
> !image-2023-02-03-18-56-10-083.png!
> I have made a PR [https://github.com/uniVocity/univocity-parsers/pull/518] for issue [univocity-parsers#505|https://github.com/uniVocity/univocity-parsers/issues/505] to univocity-parses, but it seems to be a long time for waiting it to be merged.
>
> For Spark, it's better to add a legacy config to restores the legacy behavior until univocity-parses releases a new version.
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