Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/4105#discussion_r124578206
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/functions/utils/UserDefinedFunctionUtils.scala
---
@@ -320,12 +348,20 @@ object UserDefinedFunctionUtils {
} else if(extractedType != null) {
extractedType
} else {
- TypeExtractor
+ try {
+ TypeExtractor
--- End diff --
The fallback type extraction of the accumulator type is different now.
Before, we created an accumulator instance and called
`TypeInformation.of(Any)`. Now, we try to extract it from the generics of the
UDAGG.
@twalthr, does this method work as reliable as `TypeInformation.of(Any)`?
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