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https://issues.apache.org/jira/browse/SPARK-22556?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen resolved SPARK-22556.
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Resolution: Not A Problem
> WrappedArray with Explode Function create WrappedArray with 1 object.
> ---------------------------------------------------------------------
>
> Key: SPARK-22556
> URL: https://issues.apache.org/jira/browse/SPARK-22556
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.2.0
> Environment: N/A
> Reporter: Thiago Rodrigues Baldim
>
> With org.apache.spark.sql.functions.explode function based in the result of
> an org.apache.spark.sql.functions.array the output result is not Objects
> inside of the object result.
> The result is an WrappedArray of one only one object and not the object
> itself. If we setup an scala.Array we got the result, that doesn't happens
> with the WrappedArray.
> myDf.withColumn("exploded_field", explode(array(my_arr_func('col_1),
> my_arr_func('col_2)))).take(10).foreach(println)
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