[jira] [Created] (FLINK-20700) Default value type does not match the return type of method input()

[Shang Yuanchun (Jira)]

ZhangWei created FLINK-20700:
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             Summary: Default value type does not match the return type of method input()
                 Key: FLINK-20700
                 URL: https://issues.apache.org/jira/browse/FLINK-20700
             Project: Flink
          Issue Type: Bug
          Components: Table SQL / API
    Affects Versions: 1.12.0
            Reporter: ZhangWei


In org.apache.flink.table.annotation.FunctionHint, the return type of input() is an 

array of DataTypeHint, while the default value is @DataTypeHint() which is just an object.

So the method defination should be as below, *{}*should be added.

DataTypeHint[] input() default {@DataTypeHint()};



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