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https://issues.apache.org/jira/browse/SPARK-25831?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan resolved SPARK-25831.
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Resolution: Invalid
> should apply "earlier entry wins" in hive map value converter
> -------------------------------------------------------------
>
> Key: SPARK-25831
> URL: https://issues.apache.org/jira/browse/SPARK-25831
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: Wenchen Fan
> Priority: Major
>
> {code}
> scala> sql("CREATE TABLE t AS SELECT map(1,2,1,3) as map")
> res11: org.apache.spark.sql.DataFrame = []
> scala> sql("select * from t").show
> +--------+
> | map|
> +--------+
> |[1 -> 3]|
> +--------+
> {code}
> We mistakenly apply "later entry wins"
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