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https://issues.apache.org/jira/browse/SPARK-25830?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan resolved SPARK-25830.
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Resolution: Invalid
> should apply "earlier entry wins" in Dataset.collect
> ----------------------------------------------------
>
> Key: SPARK-25830
> URL: https://issues.apache.org/jira/browse/SPARK-25830
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: Wenchen Fan
> Priority: Major
>
> {code}
> scala> sql("select map(1,2,1,3)").collect
> res14: Array[org.apache.spark.sql.Row] = Array([Map(1 -> 3)])
> {code}
> We mistakenly apply "later entry wins"
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