[jira] [Commented] (SPARK-9062) Change output type of Tokenizer to Array(String, true)

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

    [ https://issues.apache.org/jira/browse/SPARK-9062?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14627614#comment-14627614 ] 

Apache Spark commented on SPARK-9062:
-------------------------------------

User 'hhbyyh' has created a pull request for this issue:
https://github.com/apache/spark/pull/7414

> Change output type of Tokenizer to Array(String, true)
> ------------------------------------------------------
>
>                 Key: SPARK-9062
>                 URL: https://issues.apache.org/jira/browse/SPARK-9062
>             Project: Spark
>          Issue Type: Improvement
>          Components: ML
>            Reporter: yuhao yang
>            Priority: Minor
>
> Currently output type of Tokenizer is Array(String, false), which is not compatible with Word2Vec and Other transformers since their input type is Array(String, true). Seq[String] in udf will be treated as Array(String, true) by default. 
> I'm also thinking for Nullable columns, maybe tokenizer should return Array(null) for null value in the input.



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