Github user uce commented on the issue: https://github.com/apache/flink/pull/2051 Regarding local vs. cluster mode: that's on purpose, but we can certainly change that behaviour. For now, you would have to run in cluster mode. Regarding the serializer: assuming that it is a Flink `Tuple2<Long, String>` you can use the following to get the serializer: ```java TypeSerializer<?>[] fieldSerializers = new TypeSerializer[] { StringSerializer.INSTANCE, LongSerializer.INSTANCE }; TypeSerializer<Tuple2<String, Long>> serializer = new TupleSerializer<>( (Class<Tuple2<String, Long>>) (Class<?>) Tuple2.class, fieldSerializers); ``` **Just to make sure that we are on the same page: the state of this PR is not the final queryable state API, but only the initial low-level version.** Really looking forward to further feedback. Thank you for trying it out at this stage. :-)
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