hanyuzheng7 commented on code in PR #23173:
URL: https://github.com/apache/flink/pull/23173#discussion_r1491299515
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flink-table/flink-table-common/src/main/java/org/apache/flink/table/functions/BuiltInFunctionDefinitions.java:
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@@ -391,6 +391,16 @@ ANY, and(logical(LogicalTypeRoot.BOOLEAN), LITERAL)
.internal()
.build();
+ public static final BuiltInFunctionDefinition ARRAY_EXCEPT =
+ BuiltInFunctionDefinition.newBuilder()
+ .name("ARRAY_EXCEPT")
+ .kind(SCALAR)
+ .inputTypeStrategy(commonArrayType(2))
+ .outputTypeStrategy(nullableIfArgs(COMMON))
Review Comment:
In this case, it will return [1, 2, 3]
`Returns an array of the elements in array1 but not in array2, without
duplicates. If array1 is null, the function will return null.`
if array2 is null, we just deduplicate array1
And the similar test case is here:
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