Fabian Hueske created FLINK-7142:
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Summary: Scala DataSet API ignores ResultTypeQueryable interface
Key: FLINK-7142
URL: https://issues.apache.org/jira/browse/FLINK-7142
Project: Flink
Issue Type: Bug
Components: DataSet API, Scala API
Affects Versions: 1.3.1, 1.4.0
Reporter: Fabian Hueske
The {{ResultTypeQueryable}} is used to specify the return type of user-defined
functions. The Scala DataSet API ignores this interface. The only way to
override the inferred type information is to use implicit values. However, the
{{ResultTypeQueryable}} interface has the nice property that the return type is
defined in the actual function, whereas implicit types are defined in the
program, i.e., outside of the function.
IMO, the Scala DataSet API should also support the {{ResultTypeQueryable}}
interface.
What do you think [~aljoscha], [~till.rohrmann]?
Was it a conscious decision to only support implicit type definitions?
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