Question

我是ORACLE SQL的新手，我正在尝试创建一个触发器来生成auto_incement序列号作为我表中的主键，但不知道我正在制作什么错误，因为我得到了：

执行部分保存事件时出现
错误：错误代码= 4098 ST = java.sql.BatchUpdateException：ORA-04098：trigger 'TNTCA.STAGING_TRIGGER_ERROR_REASON'无效且失败重新验证\ n，由以下原因引起：\“ORA-04098：触发器 'TNTCA.STAGING_TRIGGER_ERROR_REASON'无效且失败再验证\ n \“

我的SQL语句是：

create global temporary table STAGING_ERROR_REASON (   STAGING_REASON_ID number(4) constraint STAGING_REASON_ID not null   ,REASON nvarchar2(1024) not null   ,constraint PK_STAGING_REASON_ID PRIMARY KEY(STAGING_REASON_ID) );

create sequence STAGING_SEQ_ERROR_REASON start with 1 increment by 1 minvalue 1 maxvalue 10000;

CREATE OR REPLACE TRIGGER "STAGING_TRIGGER_ERROR_REASON" 
   BEFORE INSERT ON STAGING_ERROR_REASON 
   REFERENCING NEW AS NEW 
   FOR EACH ROW 
BEGIN   
   if(:NEW.STAGING_REASON_ID is null) then   
      SELECT STAGING_SEQ_ERROR_REASON.NEXTVAL   
          INTO :NEW.STAGING_REASON_ID 
   END;

ALTER TRIGGER "STAGING_TRIGGER_ERROR_REASON" ENABLE;

Answer 1

您有两个错误：

您的IF没有END IF
您的SELECT INTO没有FROM

但是开始时不需要选择，您可以简单地分配序列值：

CREATE OR REPLACE TRIGGER "STAGING_TRIGGER_ERROR_REASON" 
   BEFORE INSERT ON STAGING_ERROR_REASON 
   REFERENCING NEW AS NEW 
   FOR EACH ROW 
BEGIN   
   if :NEW.STAGING_REASON_ID is null then   
      :NEW.STAGING_REASON_ID := STAGING_SEQ_ERROR_REASON.NEXTVAL;
   END IF; --<< missing
END;
/

不确定您运行PL / SQL的方式和位置，但您通常还会在PL / SQL块的末尾need /。

Answer 2

在Oracle中，每个SELECT语句都应该有一个FROM子句。你应该至少使用

SELECT STAGING_SEQ_ERROR_REASON.NEXTVAL INTO :NEW.STAGING_REASON_ID FROM DUAL;

Answer 3

您可以使用：

CREATE OR REPLACE TRIGGER "STAGING_TRIGGER_ERROR_REASON" 
BEFORE INSERT ON STAGING_ERROR_REASON REFERENCING NEW 
AS NEW FOR EACH ROW 
BEGIN   
 if(:NEW.STAGING_REASON_ID is null) then  
 :NEW.STAGING_REASON_ID := (SELECT STAGING_SEQ_ERROR_REASON.NEXTVAL FROM dual);
 end if;
END;

无效的触发器异常

3 个答案: