Feng Jin created FLINK-34055:
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Summary: Introduce a new annotation for named parameters.
Key: FLINK-34055
URL: https://issues.apache.org/jira/browse/FLINK-34055
Project: Flink
Issue Type: Sub-task
Components: Table SQL / Planner
Reporter: Feng Jin
Fix For: 1.19.0
Introduce a new annotation to specify the parameter name, indicate if it is
optional, and potentially support specifying default values in the future.
Deprecate the argumentNames method in FunctionHints as it is not user-friendly
for specifying argument names with optional configuration.
{code:java}
public @interface ArgumentHint {
/**
* The name of the parameter, default is an empty string.
*/
String name() default "";
/**
* Whether the parameter is optional, default is false.
*/
boolean isOptional() default false;
/**
* The data type hint for the parameter.
*/
DataTypeHint type() default @DataTypeHint();
}
{code}
{code:java}
public @interface FunctionHint {
/**
* Deprecated attribute for specifying the names of the arguments.
* It is no longer recommended to use this attribute.
*/
@Deprecated
String[] argumentNames() default {""};
/**
* Attribute for specifying the hints and additional information for
function arguments.
*/
ArgumentHint[] arguments() default {};
}
{code}
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