Oracle 存儲過程的使用
Oralce存儲過程的使用,主要包括二個部門,第一部分爲編寫響應的存儲過程;第二部分爲調用存儲過程
1. 編寫存儲過程
oracle存儲過程的編寫一般會採用程序包(即爲包頭和包體)
包頭的作用主要是聲明一些存儲過程、函數等;
包體是對包頭所聲明的存儲過程進行實現
測試
實例如下:
--編寫包頭
create or replace package package3 is
TYPE type_cur IS REF CURSOR; --聲明遊標
PROCEDURE getSystemCatByUserCode (usercode varchar2, p_rc OUT type_cur);--聲明存儲過程
end package3;
--編寫包體
create or replace package body package3 is
PROCEDURE getSystemCatByUserCode (usercode varchar2, p_rc OUT type_cur)
IS
sqlstr VARCHAR2 (1000);
v_sql varchar2(100);
v_num int;
BEGIN
v_sql:='select count(*) from sys_system_customer where usercode='''||usercode||'''';
EXECUTE IMMEDIATE v_sql INTO v_num;
IF v_num = 0 THEN
OPEN p_rc FOR
select * from Sys_System_Type;
ELSE
sqlstr :=
'with tmp as(
select ty.typename as TYPENAME,ty.id as TYPEID, ct.usercode as USERCODE ,ct.SORTID as SORTID,
st.sysname as SYSNAME,st.sysid as SYSID from sys_system_customer ct
left join sys_system st on st.sysid=ct.systemid
left join sys_system_type ty on ty.id=ct.catid where ct.usercode='''||usercode||''')
select t.TYPEID as ID,t.TYPENAME, listagg(t.SYSID,'','') within group(order by SORTID) as SUBSYSTEMIDS from tmp t group by t.TYPEID,t.TYPENAME';
OPEN p_rc FOR sqlstr;
END IF;
END getSystemCatByUserCode;
END package3;
測試
2. 存儲過程的調用
public System.Data.DataTable GetSystemCatByUserCode(string userCode)
{
OracleParameter[] parameters = {
new OracleParameter("usercode", OracleType.VarChar, 255),
new OracleParameter("p_rc", OracleType.Cursor)
};
parameters[0].Value = userCode;
parameters[1].Direction = ParameterDirection.Output;
return DbHelperOra.RunProcedure("package3.getSystemCatByUserCode", parameters, "Sys_System_Type").Tables[0];
}