[Spark-9062] [ML] Change output type of Tokenizer to Array(String, true) #7414
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Contributor
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I think this is a minor issue since we don't output null. +1 on the changes to be consistent with auto schema inference. |
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Test build #37328 has finished for PR 7414 at commit
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Member
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LGTM, I'll merge with master. |
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jira: https://issues.apache.org/jira/browse/SPARK-9062
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 not sure what's the recommended way for Tokenizer to handle the null value in the input. Any suggestion will be welcome.