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Posted to issues@flink.apache.org by "Jingsong Lee (Jira)" <ji...@apache.org> on 2020/02/24 04:06:00 UTC

[jira] [Assigned] (FLINK-13773) Rework of the Expression Design

     [ https://issues.apache.org/jira/browse/FLINK-13773?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jingsong Lee reassigned FLINK-13773:
------------------------------------

    Assignee:     (was: Jingsong Lee)

> 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, Table SQL / Legacy Planner, Table SQL / Planner
>            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]



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