實現思路和步驟:

• 業務資料有組織機構欄位
• ORACLE VPD 實現條件拼接
• JAVA 攔截器實現那些方法需要實現VPD行資料過濾
• 利用OracleConnection setEndToEndMetrics() 傳遞使用者許可權,後臺用userenv 獲取

模擬實現
建立訂單表
create table t_orders(
order_id number,
order_name varchar2(50),
org_id number
)
comment on table t_orders is ‘訂單表’;
comment on column t_orders.order_id is ‘訂單主鍵’;
comment on column t_orders.order_name is ‘訂單名稱’;
comment on column t_orders.org_id is ‘組織機構id’;
/**************************

//賦予dmbs_pls 執行許可權
grant execute on sys.DBMS_RLS to vpd_test;

/****************/
create or replace function VPD_AUTHORITY_F(p_schema in varchar2 default NULL,
p_object in varchar2 default NULL)
RETURN varchar2 AS
begin
–拼接條件
return ‘1=1’;
end;

/*增加VPD策略***/
Begin
DBMS_RLS.ADD_POLICY ( OBJECT_SCHEMA => ‘vpd_test’,
OBJECT_NAME => ‘t_orders’,
POLICY_NAME => ‘t_orders’,
FUNCTION_SCHEMA => ‘vpd_test’,
POLICY_FUNCTION => ‘VPD_AUTHORITY_F’,
STATEMENT_TYPES => ‘SELECT’);
end;

/查詢結果*****/

1 1 花生 11
2 2 瓜子 12
3 3 黃瓜 11

/修改VPD策略函式*/
create or replace function VPD_AUTHORITY_F(p_schema in varchar2 default NULL,
p_object in varchar2 default NULL)
RETURN varchar2 AS
begin
–拼接條件
return ‘org_id=11’;
end;

/查詢結果*****/
1 1 花生 11
2 3 黃瓜 11

/*整合JAVA程式*********/

package cn.cowbt.vpd.test;

import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Types;

import oracle.jdbc.OracleConnection;
import oracle.jdbc.oracore.OracleType;

public class ConnectionTest {
public static void main(String[] args) throws SQLException {
String url = “jdbc:oracle:thin:@192.168.102.131:1521:orcl”;
String user = “vpd_test”;
String passwd = “tangxuhua”;
Connection connection = DriverManager.getConnection(url, user, passwd);
OracleConnection oCon = (OracleConnection) connection ;
String sql = “select * from t_orders”;
PreparedStatement ps = oCon.prepareStatement(sql);
String[] metrics = new String[4];
metrics[0] = “hello”;//action 後臺可以用userenv 取得
metrics[1] = “org_id = 12”;//client_identifier 後臺可以用userenv 取得
metrics[3] = “bobo”;//module 後臺可以用userenv 取得
/**
* v_action := sys_context(‘userenv’, ‘action’);
v_module := sys_context(‘userenv’, ‘module’);
v_client_identifer := sys_context(‘userenv’, ‘client_identifier’);

       --後臺取得使用者的資訊,拼接成vpd 語句
       create or replace procedure test_p(v_action out varchar2,
                               v_module out varchar2,
                               v_client_identifer out varchar2)
        as

        begin
          v_action := sys_context('userenv', 'action');
          v_module := sys_context('userenv', 'module'); 
          v_client_identifer := sys_context('userenv', 'client_identifier'); 
          null;
        end test_p;
     */
    oCon.setEndToEndMetrics(metrics, (short)0);
    CallableStatement sts = connection.prepareCall("{call test_p(?,?,?)}");
    sts.registerOutParameter(1,Types.VARCHAR);
    sts.registerOutParameter(2,Types.VARCHAR);
    sts.registerOutParameter(3,Types.VARCHAR);
    sts.execute();

/*  System.out.println(sts.getObject(1));
    System.out.println(sts.getObject(2));
    System.out.println(sts.getObject(3));*/

    ResultSet rs  = ps.executeQuery();
    ResultSetMetaData rm =  rs.getMetaData();
    //System.out.println(rm.getColumnCount());
    while(rs.next()){
        Object o1 = rs.getObject(1);
        Object o2 = rs.getObject(2);
        Object o3 = rs.getObject(3);
        System.out.print(o1);
        System.out.print("---");
        System.out.print(o2);
        System.out.print("---");
        System.out.print(o3);
        System.out.println();
    }
    sts.close();
    ps.close();
    connection.close();

}

}

2—瓜子—12