oracle中的函数与触发器的使用

oracle中函数与触发器的使用，与sql中函数与触发器的使用功能是一致的。

--从临时表中查找指定的专家记录是否存在
-- drop function F_EXPERT_EXIST_IN_TEMP
create or replace function   "XHPORTAL".F_EXPERT_EXIST_IN_TEMP(
   nExpertId in NUMBER,
   nSqlType in NUMBER,
   nTrs_flag in NUMBER

)
return NUMBER is
v_count_expert NUMBER;
CURSOR c_CountExperts is select count(*) from Expert_timer$_temp  where EXPERTID = nExpertId and SQL_TYPE = nSqlType and TRS_FLAG = nTrs_flag ;
begin
   OPEN c_CountExperts;
   LOOP
       FETCH c_CountExperts INTO v_count_expert;
       EXIT WHEN  c_CountExperts%NOTFOUND;
   END LOOP;
   CLOSE c_CountExperts;
  return v_count_expert;
end F_EXPERT_EXIST_IN_TEMP;

 

--工作经历触发器(只有专家才有工作经历)
 --新增
 create or replace TRIGGER WorkHistory_I_TRIG AFTER INSERT ON XHPORTAL.XWCMWORKHISTORY
   FOR EACH ROW
   declare nExpertCount number;
   BEGIN
  select "XHPORTAL".F_EXPERT_EXIST_IN_TEMP(:new.OBJID,1,0) into nExpertCount from dual;
  if(nExpertCount =0) then 
   INSERT INTO Expert_timer$_temp VALUES(Expert_timer$_SEQ.NEXTVAL,:new.OBJID,1,0);
  end if;
   END;
 
 --修改
 create or replace TRIGGER WorkHistory_U_TRIG AFTER UPDATE ON XHPORTAL.XWCMWORKHISTORY
   FOR EACH ROW
   declare nExpertCount number;
   BEGIN
  select "XHPORTAL".F_EXPERT_EXIST_IN_TEMP(:old.OBJID,3,0) into nExpertCount from dual;
  if(nExpertCount =0) then
   INSERT INTO Expert_timer$_temp VALUES(Expert_timer$_SEQ.NEXTVAL,:old.OBJID,3,0);
  end if;
  select "XHPORTAL".F_EXPERT_EXIST_IN_TEMP(:new.OBJID,1,0) into nExpertCount from dual;
  if(nExpertCount =0) then
   INSERT INTO Expert_timer$_temp VALUES(Expert_timer$_SEQ.NEXTVAL,:new.OBJID,1,0);
  end if;
   END;

 --删除
 create or replace TRIGGER WorkHistory_D_TRIG AFTER DELETE ON XHPORTAL.XWCMWORKHISTORY
   FOR EACH ROW
   declare nExpertCount number;
   BEGIN
  select "XHPORTAL".F_EXPERT_EXIST_IN_TEMP(:old.OBJID,3,0) into nExpertCount from dual;
  if(nExpertCount =0) then
   INSERT INTO Expert_timer$_temp VALUES(Expert_timer$_SEQ.NEXTVAL,:old.OBJID,3,0);
  end if;
   END;