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https://issues.apache.org/jira/browse/SPARK-18736?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Herman van Hovell updated SPARK-18736:
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Summary: CreateMap allows non-unique keys (was: [SQL] CreateMap allow
non-unique keys)
> CreateMap allows non-unique keys
> --------------------------------
>
> Key: SPARK-18736
> URL: https://issues.apache.org/jira/browse/SPARK-18736
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.0.0
> Reporter: Eyal Farago
> Labels: map, sql, types
>
> Spark-Sql, CreateMap does not enforce unique keys, i.e. it's possible to
> create a map with two identical keys:
> CreateMap(Literal(1), Literal(11),
> Literal(1), Literal(12))
> This does not behave like standard maps in common programming languages.
> proper behavior should be chosen"
> 1. first 'wins'
> 2. last 'wins'
> 3. runtime error.
> * currently GetMapValue implements option #1. even if this is the desired
> behavior CreateMap should return a unique map.
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