snuyanzin commented on code in PR #22320:
URL: https://github.com/apache/flink/pull/22320#discussion_r1201067009
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flink-table/flink-table-api-java/src/main/java/org/apache/flink/table/api/internal/BaseExpressions.java:
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@@ -1396,6 +1397,17 @@ public OutType arrayReverse() {
return toApiSpecificExpression(unresolvedCall(ARRAY_REVERSE,
toExpr()));
}
+ /**
+ * Returns an array that contains the common elements of both input arrays.
+ *
+ * <p>Null values are not considered equal. If any of the input arrays is
null, the function
Review Comment:
why nulls are not considered to be equal?
what's other systems behavior?
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