mysql - 运行Sql触发器出错

Question

我正在尝试执行此操作。它给我 mysql 语法错误。无法弄清楚为什么。

CREATE TRIGGER trig1
AFTER INSERT OR UPDATE ON table1 
FOR EACH ROW 
INSERT INTO table2 (id,entity_type,`data`,processed,created_at,last_updated_at ) 
VALUES ( DEFAULT , 'campaigns', 
'{"campaign_id":"' CONCAT NEW.campaign_id CONCAT '","name":"' CONCAT NEW.name CONCAT '","advertiser_id":"' CONCAT NEW.advertiser_id CONCAT '","start_date":"' CONCAT NEW.start_date 
CONCAT '","end_date":"' CONCAT NEW.end_date CONCAT '","status":"' CONCAT NEW.status CONCAT '","pacing":"' CONCAT NEW.pacing CONCAT '","budget_value":"' CONCAT NEW.budget_value 
CONCAT '","gross_budget":"' CONCAT NEW.gross_budget CONCAT '"}' ,
0, CURRENT_TIMESTAMP , CURRENT_TIMESTAMP) ;

Answer 1

您在语句中错误地使用了 CONCAT。

应该如下面的语句所示:

VALUES ( DEFAULT , 'campaigns',   
CONCAT( '{"campaign_id":"', NEW.campaign_id,
        '","name":"', NEW.name,
        '","advertiser_id":"', NEW.advertiser_id,
        '","start_date":"', NEW.start_date,
        '","end_date":"', NEW.end_date,
        '","status":"', NEW.status,
        '","pacing":"', NEW.pacing,
        '","budget_value":"', NEW.budget_value,
        '","gross_budget":"', NEW.gross_budget,
        '"}' ),  
0, CURRENT_TIMESTAMP , CURRENT_TIMESTAMP ) ;

引用文档:

• CONCAT(str1,str2,...)
  • 返回连接参数所产生的字符串。可能 有一个或多个参数。