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Posted to issues@flink.apache.org by "Gabor Gevay (JIRA)" <ji...@apache.org> on 2016/09/04 16:25:21 UTC

[jira] [Created] (FLINK-4575) DataSet aggregate methods should support POJOs

Gabor Gevay created FLINK-4575:
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             Summary: DataSet aggregate methods should support POJOs
                 Key: FLINK-4575
                 URL: https://issues.apache.org/jira/browse/FLINK-4575
             Project: Flink
          Issue Type: Improvement
          Components: DataSet API
            Reporter: Gabor Gevay
            Priority: Minor


The aggregate methods of DataSets (aggregate, sum, min, max) currently only support Tuples, with the fields specified by indices. With https://issues.apache.org/jira/browse/FLINK-3702 resolved, adding support for POJOs and field expressions would be easy: {{AggregateOperator}} would create {{FieldAccessors}} instead of just storing field positions, and {{AggregateOperator.AggregatingUdf}} would use these {{FieldAccessors}} instead of the Tuple field access methods.



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