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Leonard Xu commented on FLINK-13773: ------------------------------------ [~lzljs3620320] Could you take a look these unfinished tasks? > Rework of the Expression Design > ------------------------------- > > Key: FLINK-13773 > URL: https://issues.apache.org/jira/browse/FLINK-13773 > Project: Flink > Issue Type: Improvement > Components: Table SQL / API > Reporter: Jingsong Lee > Priority: Major > > This JIRA addresses several shortcomings of current: > - New Expressions still use PlannerExpressions to type inference and > to RexNode. Flnk-planner and blink-planner have a lot of repetitive code > and logic. > - Let TableApi and Cacite definitions consistent. > - Reduce the complexity of Function development. > - Powerful Function for user. > > Key changes can be summarized as follows: > - Improve the interface of FunctionDefinition. > - Introduce type inference for built-in functions. > - Introduce ExpressionConverter to convert Expression to calcite > RexNode. > - Remove repetitive code and logic in planners. > > Details: > [https://cwiki.apache.org/confluence/display/FLINK/FLIP-51%3A+Rework+of+the+Expression+Design] -- This message was sent by Atlassian Jira (v8.3.4#803005)