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https://issues.apache.org/jira/browse/FLINK-6457?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ruidong Li updated FLINK-6457:
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Description:
Motivation:
Some methods in ScalarFunction and TableFunction are unnecessary, e.g
toString() and getResultType in ScalarFunction
this issue intend to clear the interface.
Goal:
only methods related to `Collector` will remain in TableFunction interface,
and ScalarFunction interface shall have no methods , user can choose whether to
implement the `getResultType` method, which will be called by reflection, and
the Flink document will have instructions for user.
Future:
There should be some Annotations for user to implement methods like `@Eval` for
eval method, it be will in the next issue
was:
Motivation:
Some methods in ScalarFunction and TableFunction are unnecessary, e.g
toString() and getResultType in ScalarFunction
this issue intend to clear the interface.
Goal:
only methods related to `Collector` will remain in TableFunction interface,
and ScalarFunction interface shall have no methods , user can choose whether to
implement the `getResultType` method, which will be called by reflection, and
the Flink document will have instructions for user.
> Clean up ScalarFunction and TableFunction interface
> ---------------------------------------------------
>
> Key: FLINK-6457
> URL: https://issues.apache.org/jira/browse/FLINK-6457
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Reporter: Ruidong Li
> Assignee: Ruidong Li
>
> Motivation:
> Some methods in ScalarFunction and TableFunction are unnecessary, e.g
> toString() and getResultType in ScalarFunction
> this issue intend to clear the interface.
> Goal:
> only methods related to `Collector` will remain in TableFunction interface,
> and ScalarFunction interface shall have no methods , user can choose whether
> to implement the `getResultType` method, which will be called by reflection,
> and the Flink document will have instructions for user.
> Future:
> There should be some Annotations for user to implement methods like `@Eval`
> for eval method, it be will in the next issue
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