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;