hackergin commented on code in PR #24183:
URL: https://github.com/apache/flink/pull/24183#discussion_r1468766280
##########
flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/functions/inference/TypeInferenceOperandChecker.java:
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@@ -116,7 +127,17 @@ public Consistency getConsistency() {
@Override
public boolean isOptional(int i) {
- return false;
+ Optional<List<Boolean>> optionalArguments =
typeInference.getOptionalArguments();
+ if (optionalArguments.isPresent()) {
+ return optionalArguments.get().get(i);
Review Comment:
The argument hint is for optional parameters that have default values, so
there will not be a null situation.
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