[GitHub] wangpeibin713 opened a new pull request #7638: [FLINK-11510] [DataStream] Add the MultiFieldSumAggregator to support KeyedStream.sum(int[] positionToSums )[FLINK-11510] [DataStream] Add the MultiFieldSumAggregator to support KeyedStream.sum(int[] positionToSums )

[GitBox <gi...@apache.org>]

wangpeibin713 opened a new pull request #7638: [FLINK-11510] [DataStream] Add the MultiFieldSumAggregator to support KeyedStream.sum(int[] positionToSums )[FLINK-11510] [DataStream] Add the MultiFieldSumAggregator to support KeyedStream.sum(int[] positionToSums )
URL: https://github.com/apache/flink/pull/7638
 
 
   ## What is the purpose of the change
   
   - The goal is to implement a KeyedStream API to sum with multi field as
     <https://issues.apache.org/jira/browse/FLINK-11510>
   
   ## Brief change log
   
   - add the class:
     - MultiFieldSumAggregator
   - add function in KeyedStream:
     - public SingleOutputStreamOperator sum(int[] positionToSums )
     - public SingleOutputStreamOperator sum(String[] fields)
   - add unit test in follow ut
     - DataStreamTest
     - AggregationFunctionTest
   
   ## Verifying this change
   
   This change added tests and can be verified as follows:
   
   - *Added integration tests for end-to-end deployment with small data collection*
   
   ## Does this pull request potentially affect one of the following parts:
   
   - Dependencies (does it add or upgrade a dependency): *no*
   
   - The public API, i.e., is any changed class annotated with@Public(Evolving): yes
   
     - org.apache.flink.streaming.api.datastream.KeyedStream
   
   - The serializers: *no*
   
   - The runtime per-record code paths (performance sensitive): *no*
   
   - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: *no*
   
   - The S3 file system connector: *no*
   
   ## Documentation
   
   - Does this pull request introduce a new feature? yes
   - If yes, how is the feature documented? not documented

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