Eyal Farago created SPARK-18736:
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Summary: [SQL] CreateMap allow 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
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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