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ASF GitHub Bot commented on FLINK-1032: --------------------------------------- Github user StephanEwen commented on the pull request: https://github.com/apache/incubator-flink/pull/141#issuecomment-57939198 The TupeSerializer and the TupleComparators have pretty massive stand-alone tests. I could not find something similar for the PojoSerializer. Check out the `AbstractGenericTypeSerializerTest`, on which the AvroSerializer and the KryoSerializer build their tests. > Extend POJO Field Selectors to Support Accessing Nested Objects > --------------------------------------------------------------- > > Key: FLINK-1032 > URL: https://issues.apache.org/jira/browse/FLINK-1032 > Project: Flink > Issue Type: Sub-task > Components: Java API > Reporter: Aljoscha Krettek > Assignee: Robert Metzger > > Right now you can only use fields of the top-level object as key fields in > groupings, joins, and co-group. This should be extended to allow using nested > fields. We have to be careful with null fields, though. -- This message was sent by Atlassian JIRA (v6.3.4#6332)