实时计算udf函数

类名 org.example.ValueReverse

kafkacs2024 字段列表需要有 proc_time AS PROCTIME()

用法 hscs为函数名称

INSERT INTO  `FLINK_CATALOG`.`FLINK_DATABASE`.`z_test`
SELECT
    a.`id` 
    ,b.`name` as  wname
    ,hscs(a.name) as hsname
	,a.name as name
FROM  `FLINK_CATALOG`.`FLINK_DATABASE`.`kafkacs2024`    a
 LEFT JOIN
`FLINK_CATALOG`.`FLINK_DATABASE`.`student`  FOR SYSTEM_TIME AS OF a.proc_time AS b ON b.`id`=a.`id`

用途 倒序