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Posted to issues@flink.apache.org by "Timo Walther (JIRA)" <ji...@apache.org> on 2017/09/26 12:51:00 UTC
[jira] [Created] (FLINK-7691) Remove ClassTag in Scala DataSet API
Timo Walther created FLINK-7691:
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Summary: Remove ClassTag in Scala DataSet API
Key: FLINK-7691
URL: https://issues.apache.org/jira/browse/FLINK-7691
Project: Flink
Issue Type: Improvement
Components: DataSet API
Reporter: Timo Walther
In the DataStream API a {{ClassTag}} is not required, which allows to pass {{TypeInformation}} manually if required. In the DataSet API most methods look like:
{code}
// DataSet API
def fromElements[T: ClassTag : TypeInformation](data: T*): DataSet[T]
// DataStream API
def fromElements[T: TypeInformation](data: T*): DataStream[T]
{code}
I would propose to remove the ClassTag, if possible. This would make it easier e.g. to supply TypeInformation for the {{Row}} type. Or is there an easier way in Scala that I don't know?
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