用存储过程 给表增加序列与触发器

create or replace procedure p_createseq(tablename in varchar2,key in varchar2)
Authid Current_User --使用角色权限，否则无法创建序列或表
is
strsql varchar2(500);
t_key  varchar2(500);
begin
--创建序列
strsql:=‘create sequence seq_‘||tablename||
‘ minvalue 1000 maxvalue 99999999 start with 1 increment by 1 nocache‘;
execute immediate strsql;
--设置触发器默认主键名
if(key is NULL) then t_key := ‘ID‘ ;
else t_key := key;
end if;
--创建触发器
strsql := ‘CREATE OR REPLACE TRIGGER TRG_‘||tablename||‘
BEFORE INSERT ON ‘||tablename ||‘
FOR EACH ROW
BEGIN
SELECT SEQ_‘||tablename||‘.NEXTVAL INTO :NEW.‘||t_key||‘ FROM DUAL;
END; ‘;
execute immediate strsql;
end p_createseq;