[GitHub] [flink] beyond1920 opened a new pull request #8697: [FLINK-12810][table-planner-blink] Support to run a TableAPI query like 'table.select('a, 'b, 'c)'

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

beyond1920 opened a new pull request #8697: [FLINK-12810][table-planner-blink] Support to run a TableAPI query like 'table.select('a, 'b, 'c)'
URL: https://github.com/apache/flink/pull/8697
 
 
   ## What is the purpose of the change
   The pr aims to support to run a TableAPI query like 'table.select('a, 'b, 'c)'
   
   ## Brief change log
   1. add RexNodeConverter to convert Expression to RexNode
   2. Introduce RexPlannerExpression to wraps a RexNode, which is similar to RexPlannerExpression in flink-planner module.
   3. add QueryOperationConverter to convert QueryOperation tree to RelNode
   4. Introduce PlannerQueryOperation to wraps a RelNode in QueryOperation, which is similar to PlannerQueryOperation in flink-planner module.
   5. add OperationTreeBuilder and relative classes(ExpressionResolver, TableReferenceLookup, FieldReferenceLoopup, ExpandColumnFunctionsRule, LookupCallByNameRule, ResolverRule, StarReferenceFlattingRule, VerifyNoUnresolvedExpressionRule), which is almost copy from flink-planner module to blink-planner module, except that we remove dependency on PlannerExpression. *Note: This is temporal solution, since OperationTreeBuilder will be moved to api module finally.*
   6. add implicit conversion in expressionDsl
   
   ## Verifying this change
   ITCase
   
   ## 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)
     - If yes, how is the feature documented? (not applicable)
   

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