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https://issues.apache.org/jira/browse/FLINK-31682?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17714538#comment-17714538
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jackylau commented on FLINK-31682:
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hi [~Sergey Nuyanzin] , i supported this here
https://issues.apache.org/jira/browse/FLINK-31691 , when it merged, i will fix
this
do you have time to review it ?
> 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
> Priority: Major
> 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
>
> spark https://github.com/apache/spark/pull/21258/files
> maxcompute
> [https://www.alibabacloud.com/help/en/maxcompute/latest/complex-type-functions#section-7ue-e91-m0s]
> presto https://prestodb.io/docs/current/functions/map.html
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