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doc-exports/docs/mrs/component-operation-guide-lts/mrs_01_24224.html
Yang, Tong 3f5759eed2 MRS comp-lts 2.0.38.SP20 version 
Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>
Co-authored-by: Yang, Tong <yangtong2@huawei.com>
Co-committed-by: Yang, Tong <yangtong2@huawei.com>
2023-01-19 17:08:45 +00:00

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UDF Java and SQL Examples

UDF Java Example

package com.xxx.udf;
import org.apache.flink.table.functions.ScalarFunction;
public class UdfClass_UDF extends ScalarFunction {
    public int eval(String s) {
        return s.length();
    }
}

UDF SQL Example

CREATE TEMPORARY FUNCTION udf as 'com.xxx..udf.UdfClass_UDF';
CREATE TABLE udfSource (a VARCHAR) WITH ('connector' = 'datagen','rows-per-second'='1');
CREATE TABLE udfSink (a VARCHAR,b int) WITH ('connector' = 'print');
INSERT INTO
  udfSink
SELECT
  a,
  udf(a)
FROM
  udfSource;