Jark Wu created FLINK-6888:
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Summary: Can not determine TypeInformation of ACC type of
AggregateFunction when ACC is a Scala case/tuple class
Key: FLINK-6888
URL: https://issues.apache.org/jira/browse/FLINK-6888
Project: Flink
Issue Type: Bug
Components: Table API & SQL
Reporter: Jark Wu
Assignee: Jark Wu
Fix For: 1.4.0
Currently the {{ACC}} TypeInformation of
{{org.apache.flink.table.functions.AggregateFunction[T, ACC]}} is extracted
using {{TypeInformation.of(Class)}}. When {{ACC}} is a Scala case class or
tuple class, the TypeInformation will fall back to {{GenericType}} which result
in bad performance when state de/serialization.
I suggest to extract the ACC TypeInformation when called
{{TableEnvironment.registerFunction()}}.
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