[GitHub] [flink] JingsongLi opened a new pull request #8530: [FLINK-12611][table-planner-blink] Make time indicator nullable in blink

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

JingsongLi opened a new pull request #8530: [FLINK-12611][table-planner-blink] Make time indicator nullable in blink
URL: https://github.com/apache/flink/pull/8530
 
 
   ## What is the purpose of the change
   
   Make time indicator nullable in blink to support agg on TimeIndicator
   
   ## 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? no

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