[ https://issues.apache.org/jira/browse/SPARK-22001?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiao Li reassigned SPARK-22001:
-------------------------------
Assignee: Liang-Chi Hsieh
> 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: Liang-Chi Hsieh
> Fix For: 2.3.0
>
>
> 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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