twalthr commented on a change in pull request #13144:
URL: https://github.com/apache/flink/pull/13144#discussion_r470458434
##########
File path:
flink-connectors/flink-connector-hive/src/main/java/org/apache/flink/table/functions/hive/HiveScalarFunction.java
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@@ -82,6 +84,13 @@ public void open(FunctionContext context) {
isArgsSingleArray =
HiveFunctionUtil.isSingleBoxedArray(argTypes);
}
+ @Override
+ public TypeInference getTypeInference(DataTypeFactory typeFactory) {
+ TypeInference.Builder builder = TypeInference.newBuilder();
+ builder.outputTypeStrategy(new ResultTypeStrategy(this));
Review comment:
I guess we will also need a matching input type strategy such that the
validation can work properly.
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