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https://issues.apache.org/jira/browse/SPARK-19435?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiao Li resolved SPARK-19435.
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Resolution: Fixed
Fix Version/s: 2.2.0
> Type coercion between ArrayTypes
> --------------------------------
>
> Key: SPARK-19435
> URL: https://issues.apache.org/jira/browse/SPARK-19435
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.2.0
> Reporter: Hyukjin Kwon
> Assignee: Hyukjin Kwon
> Fix For: 2.2.0
>
>
> It seems currently we don't allow type coercion between arrays. We now
> implicitly cast it in SPARK-18624
> So, the below codes are not working now.
> {code}
> Seq(Array(1)).toDF("a").selectExpr("greatest(a, array(1D))")
> Seq(Array(1)).toDF("a").selectExpr("least(a, array(1D))")
> sql("SELECT * FROM values (array(0)), (array(1D)) as data(a)")
> Seq(Array(1)).toDF("a").union(Seq(Array(1D)).toDF("b"))
> sql("SELECT IF(1=1, array(1), array(1D))")
> {code}
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