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

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Won't Fix
• Affects Version/s: 1.12.0
• Component/s: Table SQL / API
• Assignee: Unassigned
• Reporter: ZhangWei
• Created: 21/Dec/20 15:50
• Updated: 13/Apr/21 20:41
• Resolved: 12/Jan/21 09:28

Description

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()};