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

["Joseph K. Bradley (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-9062?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Joseph K. Bradley resolved SPARK-9062.
--------------------------------------
       Resolution: Fixed
    Fix Version/s: 1.5.0

Issue resolved by pull request 7414
[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
>             Fix For: 1.5.0
>
>
> 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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