[GitHub] [flink] JingsongLi opened a new pull request #8120: [FLINK-12120][table-planner-blink] Introduce "select sum(b), count(c) from T group by a" in Blink batch

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

JingsongLi opened a new pull request #8120: [FLINK-12120][table-planner-blink] Introduce "select sum(b), count(c) from T group by a" in Blink batch
URL: https://github.com/apache/flink/pull/8120
 
 
   ## What is the purpose of the change
   
   Introduce "select sum(b), count(c) from T group by a" in Blink batch
   Finish batch sort agg and batch hash agg.
   
   ## Brief change log
   
    - Finish BatchExecSortAggregate
    - Finish BatchExecHashAggregate
    - Add AggITCase
    - Add hash exchange to BatchExecExchange
    - Finish BatchExecSort
    - Fix DecimalAvgAggFunction bug
    - Fix agg resultType not use scala implicitly type in AggCodeGenHelper
    - Add row type support in CodeGenUtils.hashCodeForType
    - Fix setDecimal in CodeGenUtils
    - Invoke endInput in close before the introducing of runtime
   
   ## Verifying this change
   
   ut
   
   ## 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)`: (no)
     - 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? (JavaDocs)
   

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