liuyongvs commented on code in PR #3202:
URL: https://github.com/apache/calcite/pull/3202#discussion_r1195897134
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core/src/main/java/org/apache/calcite/runtime/SqlFunctions.java:
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@@ -3797,6 +3797,29 @@ public static List distinct(List list) {
return new ArrayList<>(result);
}
+ /** Support the ARRAY_EXCEPT function. */
Review Comment:
@herunkang2018 the spark supports it has two way because the runtime binary
compare
1) complex type, compare using for loop
2) simple type using OpenHashSet, and it just for check
and i supports array_union in flink , you can see here
https://github.com/apache/flink/pull/22483
the result should consider order, which is different from
multiset_union/multiset_intersect in calcite implementation
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