liuyongvs commented on code in PR #15797:
URL: https://github.com/apache/flink/pull/15797#discussion_r1118537044
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docs/data/sql_functions.yml:
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@@ -617,6 +617,15 @@ collection:
- sql: ARRAY_DISTINCT(haystack)
table: haystack.arrayDistinct()
description: Returns an array with unique elements. If the array itself is
null, the function will return null. Keeps ordering of elements.
+ - sql: MAP_KEYS(map)
+ table: MAP.mapKeys()
+ description: Returns the keys of the map as array.
+ - sql: MAP_VALUES(map)
Review Comment:
Returns an unordered array containing the keys of the map like spark
https://spark.apache.org/docs/latest/api/sql/index.html#map_keys
i suggest add unordered array
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