snuyanzin commented on code in PR #28155:
URL: https://github.com/apache/flink/pull/28155#discussion_r3236869489
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flink-table/flink-table-runtime/src/main/java/org/apache/flink/table/runtime/functions/scalar/ArraySortFunction.java:
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@@ -109,8 +109,14 @@ public ArraySortComparator(boolean isAscending) {
@Override
public int compare(Object o1, Object o2) {
try {
- boolean isGreater = (boolean) greaterHandle.invoke(o1, o2);
- return isAscending ? (isGreater ? 1 : -1) : (isGreater ? -1 :
1);
+ // Two probes so equal elements return 0 (Comparator contract).
+ if ((boolean) greaterHandle.invoke(o1, o2)) {
+ return isAscending ? 1 : -1;
+ }
+ if ((boolean) greaterHandle.invoke(o2, o1)) {
+ return isAscending ? -1 : 1;
+ }
Review Comment:
we don't have such function right?
adding a new function ideally requires research what other vendors provide
to follow the most common syntax.
From existing we could use `CASE ...WHEN` which is lazy
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