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https://issues.apache.org/jira/browse/SPARK-22001?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-22001:
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Assignee: Apache Spark
> ImputerModel can do withColumn for all input columns at one pass
> ----------------------------------------------------------------
>
> Key: SPARK-22001
> URL: https://issues.apache.org/jira/browse/SPARK-22001
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.2.0
> Reporter: Liang-Chi Hsieh
> Assignee: Apache Spark
>
> SPARK-21690 makes one-pass {{Imputer}} by parallelizing the computation of
> all input columns. When we transform dataset with {{ImputerModel}}, we do
> {{withColumn}} on all input columns sequentially. We can also do this on all
> input columns at once.
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