snuyanzin commented on code in PR #22717:
URL: https://github.com/apache/flink/pull/22717#discussion_r1223879213
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docs/data/sql_functions.yml:
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@@ -646,6 +646,9 @@ collection:
- sql: ARRAY_UNION(array1, array2)
table: haystack.arrayUnion(array)
description: Returns an array of the elements in the union of array1 and
array2, without duplicates. If any of the array is null, the function will
return null.
+ - sql: ARRAY_CONCAT(array1, ...)
+ table: array1.arrayConcat(array1, ...)
+ description: Returns an array of the elements in the concat of at least
one array. If all of the arrays are null, the function will return null.
Review Comment:
From the description it is not clear what happens if not every input array
is `null`
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