（7）FlinkSQL将kafka数据写入到mysql方式二

    public static void main(String[] args) throws Exception {

        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        env.setParallelism(1);
        StreamTableEnvironment tableEnv = StreamTableEnvironment.create(env);

        tableEnv.executeSql("CREATE TABLE WaterSensor (" +
                "id STRING," +
                "ts BIGINT," +
                "vc BIGINT," +
//                "`pt` TIMESTAMP(3),"+
//                "WATERMARK FOR pt AS pt - INTERVAL '10' SECOND" +
                "pt as PROCTIME() " +
                ") WITH (" +
                "'connector' = 'kafka'," +
                "'topic' = 'kafka_data_waterSensor'," +
                "'properties.bootstrap.servers' = '127.0.0.1:9092'," +
                "'properties.group.id' =  'test'," +
                "'scan.startup.mode' = 'earliest-offset'," +
//                "'json.fail-on-missing-field' = 'false'," +
//                "'json.ignore-parse-errors' = 'true'," +
                "'format' = 'json'" +
                ")"
        );

        tableEnv.executeSql("CREATE TABLE flinksink (" +
                "componentname STRING," +
                "componentcount BIGINT NOT NULL," +
                "componentsum BIGINT" +
                ") WITH (" +
                "'connector.type' = 'jdbc'," +
                "'connector.url' = 'jdbc:mysql://localhost:3306/testdb?characterEncoding=UTF-8&useUnicode=true&useSSL=false&tinyInt1isBit=false&allowPublicKeyRetrieval=true&serverTimezone=Asia/Shanghai'," +
                "'connector.table' = 'flinksink'," +
                "'connector.driver' =  'com.mysql.cj.jdbc.Driver'," +
                "'connector.username' = 'root'," +
                "'connector.password' = 'root'," +
                "'connector.write.flush.max-rows'='3'\r\n" +
                ")"
        );

        Table result = tableEnv.sqlQuery(
                "SELECT " +
                        "id as componentname, " +                //window_start, window_end,
                        "COUNT(ts) as componentcount ,SUM(ts) as componentsum " +
                        "FROM TABLE( " +
                        "TUMBLE( TABLE WaterSensor , " +
                        "DESCRIPTOR(pt), " +
                        "INTERVAL '10' SECOND)) " +
                        "GROUP BY id , window_start, window_end"
        );

//        //方式一：写入数据库
////        result.executeInsert("flinksink").print(); //;.insertInto("flinksink");
//
        //方式二：写入数据库
        tableEnv.createTemporaryView("ResultTable", result);
        tableEnv.executeSql("insert into flinksink SELECT * FROM ResultTable").print();

        env.execute();
    }