snuyanzin commented on code in PR #22320:
URL: https://github.com/apache/flink/pull/22320#discussion_r1201064897
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docs/data/sql_functions.yml:
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@@ -643,6 +643,9 @@ collection:
- sql: ARRAY_REVERSE(haystack)
table: haystack.arrayReverse()
description: Returns an array in reverse order. If the array itself is
null, the function will return null.
+ - sql: ARRAY_INTERSECT(haystack, needle)
+ table: haystack.arrayIntersect(needle)
+ description: Returns an array that contains the common elements of both
input arrays.
Review Comment:
it doesn't reflect the fact mentioned in PR's description about only one
element in common.
E.g. `array1 = array[1, 1, 2, 2, 3, 3]` and `array2 = array[2, 3, 2, 3]`
what will the function return?
also probably need to change name of args (`needle` and `haystack`)
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