我在使用合并编译触发器时遇到问题

问题描述

您能解释一下我的代码在哪里出错吗？

CREATE OR REPLACE TRIGGER mda_01.tr_01_t01003 AFTER
    INSERT ON mda_01.t01004_bo_semafor_log
    FOR EACH ROW
DECLARE
    PRAGMA autonomous_transaction;
BEGIN
    IF inserting THEN
        MERGE INTO mda_01.t01003_bo_semafor a
        USING (
                  SELECT
                      :new.semafor_name,:new.semafor_ts,:new.semafor_status,:new.semafor_desc
                  FROM
                      dual
              ) b
         ON ( b.semafor_name = a.semafor_name )
        WHEN MATCHED THEN UPDATE
        SET a.semafor_ts = b.semafor_ts,a.semafor_status = b.semafor_status
        WHEN NOT MATCHED THEN
        INSERT (
            semafor_name,semafor_ts,semafor_status,semafor_desc )
        VALUES
            ( b.semafor_name,b.semafor_ts,b.semafor_status,b.semafor_desc );

    END IF;

    COMMIT;
END;
/

我得到一个错误：

LINE / COL ERROR

---

5/6 PL / sql：忽略了sql语句

16/8 PL / sql：ORA-00904：“ B”。“ SEMAFOR_NAME”：无效的标识符

错误：检查编译器日志

谢谢保罗

解决方法

我解决了这个问题。 我添加了别名，并且触发器已编译且没有错误：

 SELECT
                      :new.semafor_name as semafor_name,:new.semafor_ts as semafor_ts,:new.semafor_status as semafor_status,:new.semafor_desc as semafor_desc
                  FROM
                      dual