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Posted to issues@flink.apache.org by "Gabor Gevay (JIRA)" <ji...@apache.org> on 2016/09/04 19:08:20 UTC

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

     [ https://issues.apache.org/jira/browse/FLINK-4575?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gabor Gevay updated FLINK-4575:
-------------------------------
    Assignee:     (was: Gabor Gevay)

> 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
>              Labels: starter
>
> 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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