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From "Takeshi Yamamuro (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-19783) Treat shorter/longer lengths of tokens as malformed records in CSV parser
Date Wed, 01 Mar 2017 10:04:45 GMT

    [ https://issues.apache.org/jira/browse/SPARK-19783?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15889886#comment-15889886
] 

Takeshi Yamamuro commented on SPARK-19783:
------------------------------------------

I think we must treat longer length of tokens as malformed ones because dropping some tokens
leads to loss of information. But, I'm not 100% sure that shorter ones are malformed. What
do you think? cc: [~hyukjin.kwon]
I just made a prototype here: https://github.com/apache/spark/compare/master...maropu:SPARK-19783
This is the version that handles both pattens as malformed.

> Treat shorter/longer lengths of tokens as malformed records in CSV parser
> -------------------------------------------------------------------------
>
>                 Key: SPARK-19783
>                 URL: https://issues.apache.org/jira/browse/SPARK-19783
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 2.1.0
>            Reporter: Takeshi Yamamuro
>
> If a length of tokens does not match an expected length in a schema, we probably need
to treat it as a malformed record.
> https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/csv/UnivocityParser.scala#L239



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