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https://issues.apache.org/jira/browse/SPARK-9062?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joseph K. Bradley updated SPARK-9062:
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Shepherd: Joseph K. Bradley
> 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
> Assignee: 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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