Flink Sql 实用记录

1. Sink Kafka
   错误1：doesn't support consuming update and delete changes which is produced by node TableSourceScan
   解答：flink1.11之后引入了CDC（Change Data Capture，变动数据捕捉）阿里大神开源的，此次错误是因为Source源是mysql-cdc所以获取的数据类型为Changelog格式，所以在WITH kafka的时候需要指定format=debezium-json
   错误2：No operators defined in streaming topology. Cannot execute
   解答：在此次流计算当中没有任何一个operators算子/算子链执行

2. Source Mysql
       0、错误信息：The server time zone value 'Öйú±ê׼ʱ¼ä' is unrecognized or represents more than one time zone
       1、set global time_zone = '+8:00';
       2、set time_zone = '+8:00';
       3、flush privileges; 
       4、或者根据参数serverTimeZone指定
3. Flink sql任务在本地正常，上线报错

       
         org.apache.flink
         flink-table-planner-blink_2.11
         ${flink.version}
         provided//需要添加
       

    

4. 1.11 版本之前用户的 DDL 需要声明成如下方式

   CREATE TABLE user_behavior (
     ...
   ) WITH (
     'connector.type'='kafka',
     'connector.version'='universal',
     'connector.topic'='user_behavior',
     'connector.startup-mode'='earliest-offset',
     'connector.properties.zookeeper.connect'='localhost:2181',
     'connector.properties.bootstrap.servers'='localhost:9092',
     'format.type'='json'
   );

   而在 Flink SQL 1.11以及之后的版本中则简化为
    

   CREATE TABLE user_behavior (
     ...
   ) WITH (
     'connector'='kafka',
     'topic'='user_behavior',
     'scan.startup.mode'='earliest-offset',
     'properties.zookeeper.connect'='localhost:2181',
     'properties.bootstrap.servers'='localhost:9092',
     'format'='json'
   );

    

5.