我有触发审计,它存储了对任何EMP表行执行的操作.
这个触发器工作正常,除了在某些情况下(很少发生,我无法确定确切的条件)它给了我
Oracle错误:ORA-01400:无法插入NULL(“MY_SCHEMA”.“HIST_EMP”.“操作”)
CREATE OR REPLACE TRIGGER HIST_EMP_AIUD AFTER UPDATE OR INSERT OR DELETE ON EMP REFERENCING NEW AS NEW OLD AS OLD FOR EACH ROW DECLARE v_action VARCHAR2(1) := 'D'; BEGIN IF INSERTING THEN v_action := 'A'; ELSIF UPDATING THEN v_action := 'U'; END IF; IF DELETING THEN INSERT INTO hist_emp (source_rowid,source_date,action) VALUES (:old.rowid,SYSDATE,v_action); ELSIF INSERTING OR UPDATING THEN INSERT INTO hist_emp (source_rowid,action) VALUES (:new.rowid,v_action); END IF; EXCEPTION WHEN OTHERS THEN --Code to Log -- <some exception handling should be placed here > END;
解决方法
我想,变量v_action初始化会发生一些奇怪的事情.尝试处理所有3种可能性:
v_action:= null; IF INSERTING THEN v_action := 'A'; ELSIF UPDATING THEN v_action := 'U'; ELSIF DELETING THEN v_action := 'D'; END IF;