[jira] [Created] (FLINK-31682) map_from_arrays should take whether allow duplicate keys and null key into consideration

[jackylau (Jira)]

jackylau created FLINK-31682:
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             Summary: map_from_arrays should take whether allow duplicate keys 
and null key into consideration
                 Key: FLINK-31682
                 URL: https://issues.apache.org/jira/browse/FLINK-31682
             Project: Flink
          Issue Type: Improvement
          Components: Table SQL / Planner
    Affects Versions: 1.18.0
            Reporter: jackylau
             Fix For: 1.18.0


after research the spark/presto/maxcompute about 
map_from_arrays/map_from_entries, there all support duplicate keys and null key 
 for the most part



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