什么是MOAC
MOAC(Multi-Org Access Control)为多组织访问控制，是Oracle EBS R12的重要新功能，它可以实现在一个Responsibility下对多个Operation Unit(OU)进行操作。MOAC允许用户在不切换responsibility的情况下，在一个responsibility下处理多个OU组织的事务。
User --> Responsibilities --> Single Operation Unit Mode / Multiple Operation Unit Mode
一个应用场景:
某集团公司下边主要分为三个区域（北美，欧洲，亚太），亚太区你是一采购部经理，负责所有七个Operation Unit。
这种情况下，系统管理员可以创建一个security profile，这个security profile设置成可以访问这七个亚太组织，并把这个security profile赋予到你的responsibility下，这样你就能在同一个职责下访问这七个OU了，就不用不停地切换职责来访问不同OU了。
另外如果你要经常处理中国OU下的事务，那么你可以设置Profile:MO: Default Operating Unit到中国，那么业务默认的OU就是中国了。
MOAC相关的Profile
有三个主要的Profile
MO: Security Profile :provides access to multiple operating units from a single responsibility.If the MO: Security Profile is set, then the MO: Operating Unit profile will be ignored.
MO: Default Operating Unit :If you set the MO: Security Profile profile option, you can also set an operating unit as the default operating unit using the MO: Default Operating Unit profile option. This is useful when you transact in multiple operating unit but frequently transact in one operating unit.
MO: Operating Unit :MO: Operating Unit profile option only provides access to one operating unit.
MOAC profiles rules
1) If the profile option “MO: Security Profile” is not set, then “MO: Operating Unit” value is used as the default Operating Unit even if “MO: Default Operating Unit” profile is set to a different value.
2) If the profile option “MO: Security Profile” is set and gives access to only one Operating Unit, the default Operating Unit will return this value even if “MO: Default Operating Unit” is set to a different value.
3) If the profile option “MO: Security Profile” is set and gives access to multiple Operating Units :
- If the profile value “MO: Default Operating Unit” is set, it is validated against the list of Operating Units in “MO: Security Profile”.
+ If the Operating Unit is included in the security profile then it is returned as the default value.
+ Else there is no defaulted Operating Unit .
- If the Profile Option “MO: Default Operating Unit” is not set, then there is zero (no) default Operating Unit.
单组织的案例
单组织即一个Responsibility只访问一个OU，设置情况大体如下，对于职责：Manufacturing and Distribution Manager，
MO: Operating Unit=Vision Operations
MO: Security Profile=空
这样我们在使用职责：Manufacturing and Distribution Manager的时候，就只能访问到Vision Operations的数据，比如创建的PO，这个PO只能处于OU:Vision Operations下，另外所选取的供货商也只能是Vision Operations下的。
多组织的案例
首先定义一个Security Profile，路径：HRMS Super User Responsibility > Security > Define Security Profile，Business Group:Vision Corporation,'Security Type'选择'Secure organizations by organization hierarchy and/or organization list'，并且我们把在Organization Name列表中添加三个OU:Vision Operations，Vision Corporation ，Vision Services.
保存定义的Security Profile,然后在HR职责下，运行“Security List Maintenance” program，“Generate lists for”= One Named Security Profile ，Security Profile是刚刚定义的'PTIAN_SECURITY_PROFILE'。
Security List Maintenance的作用是让你定义的Security Profile生效，能够设置到Profile "MO: Security Profile"（The Security List Maintenance concurrent program must be run each time you add or change Security Profiles.）
System Admin职责下，Profile > System，设置MO: Security Profile为刚刚定义的'PTIAN_SECURITY_PROFILE'
再切回Manufacturing and Distribution Manager职责，打开PO，这个时候，你就可以不切换职责的情况，定义三个OU下的采购订单了。
MOAC的实现原理-VPD技术
MOAC的实现是通过Oracle数据库的VPD(Virtual Private Database)技术来实现的。VPD技术提供了数据库对象（表，同义词，视图）行级别访问的控制。使用VPD技术可以有效地限制用户获取数据的范围。
Secooler 的一篇文章 使用Oracle VPD（Virtual Private Database）限制用户获取数据的范围 讲VPD，里边的例子非常容易理解.
--1.Create Datacreate table t (x number);insert into t values (1);insert into t values (2);insert into t values (10001);insert into t values (10002);commit;select * from t;output:121000110002--2.Create VPD FUNCTIONCREATE OR REPLACE FUNCTION f_limited_query_t (s_schema IN VARCHAR2, s_object IN VARCHAR2) RETURN VARCHAR2ASBEGIN RETURN 'X <= 10000';END;--3.Register VPD Policy.BEGIN DBMS_RLS.add_policy (object_schema => 'APPS', object_name => 'T', policy_name => 'POLICY_LIMITED_QUERY_T', function_schema => 'APPS', policy_function => 'F_LIMITED_QUERY_T');END;select * from t;output:12
对于上边例子，我们对表T使用了VPD技术，引入了表限制Function f_limited_query_t，这样我们通过function限制了对表的查询，查询结果只返回小于10000的数字。
如何查看我们是否对某张表使用了VPD技术
SELECT * FROM DBA_POLICIES WHERE object_name = 'T';
查询结果中，其中Pakcage + Function就是我们对于表所加的限制。
那么Oracle EBS是如何使用VPD技术来实现多组织的
R12里,以PO表为例，PO_HEADERS_ALL是基础表(PO/APPS Scehma)，PO_HEADERS是PO_HEADERS_ALL对应的Synonym对象(Apps Schema),我们对PO_HEADERS应用VPD技术.MO_GLOBAL-Dive into R12 Multi Org Design 有较为详细的说明，
In pre Release 12, you would have had following methodology for PO_HEADERS_ALLa. A table is created in PO Schema, named PO_HEADERS_ALLb. A synonym named PO_HEADERS_ALL is created in APPS schema, referring to PO.PO_HEADERS_ALLc. Create a view PO_HEADERS in APPS schema, as "select * from po_headers_all where org_id=client_info"But now in R12, following will happena. A table is created in PO Schema, named PO_HEADERS_ALLb. A synonym named PO_HEADERS_ALL is created in APPS schema, referring to PO.PO_HEADERS_ALLc. Another synonym named PO_HEADERS is created in APPS, referring to PO_HEADERS_ALLd. A Row Level security is applied to PO_HEADERS, using package function MO_GLOBAL.ORG_SECURITY.This can be double-checked by running SQL select * from all_policies where object_name='PO_HEADERS'e. The effect of this policy is that,whenever you access PO_HEADERS, Oracle RLS will dynamically append WHERE CLAUSE similar to belowSELECT * FROM PO_HEADERS WHERE EXISTS (SELECT 1 FROM mo_glob_org_access_tmp oa WHERE oa.organization_id = org_id)
看下下边Query的输出
SELECT * FROM DBA_POLICIES WHERE object_name = 'PO_HEADERS';
可以看到，我们对表PO_HEADERS加了MO_GLOBAL.ORG_SECURITY限制，MO_GLOBAL.ORG_SECURITY的作用实际上就是根据你关于MOAC Profiles的设置，然后转换为相应Where条件(组织过滤)，再进行查询。
对于VPD表的查询
对于VPD表，简单的查询一般是不返回记录的，如果想查到记录，需要设置一下上下文先--普通查询VPD表select * from PO_HEADERS;--No Output--Single OU ModeBEGIN execute mo_global.set_policy_context('S',204); --204为ORG_ID,S表示Single Org ContextEND;select * from PO_HEADERS;--会输出OU：204下边的所有PO--Multiple OU Mode(simulate login to a specific responsibility)a. Call fnd_global.apps_initialize(userid,resp_id,resp_appl_id);b. call MO_GLOBAL.INIT(p_appl_short_name);This will read the MO profile option values for your responsibility/user, and will initialize the Multi Org Access.c.select * from po_headers
MOAC API
What is the purpose of MO_GLOBAL.ORG_SECURITY?The purpose of Row-Level-Security is to hide certain data[based on some conditions]. RLS does so by appending a where clause to the secured object.1. MO_GLOBAL.ORG_SECURITY is a function that returns a predicate for the WHERE CLAUSE2. The where clause will be appended to Table/Synonym/View for which Multi Org Row Level security is enabledWhat is the purpose of MO_GLOBAL.SET_POLICY_CONTEXT ?This procedure has two parameters p_access_mode Pass a value "S" in case you want your current session to work against Single ORG_ID Pass a value of "M" in case you want your current session to work against multiple ORG_ID's p_org_id Only applicable if p_access_mode is passed value of "S"
MOAC相关的查询语句
Security Profile Definiation
SELECT *FROM per_security_profilesWHERE security_profile_name = 'PTIAN_SECURITY_PROFILE';
check Organization which are related to a profile
select PPO.*from PER_SECURITY_PROFILES PPR, PER_SECURITY_ORGANIZATIONS PPOwhere PPR.security_profile_id = PPO.security_profile_idand security_profile_name like '%PTIAN_SECURITY_PROFILE%';List Profile Option Values For All Levels
set long 10000 set pagesize 500 set linesize 160 column SHORT_NAME format a30 column NAME format a40 column LEVEL_SET format a15 column CONTEXT format a30 column VALUE format a40 select p.profile_option_name SHORT_NAME, n.user_profile_option_name NAME, decode(v.level_id, 10001, 'Site', 10002, 'Application', 10003, 'Responsibility', 10004, 'User', 10005, 'Server', 10006, 'Org', 10007, decode(to_char(v.level_value2), '-1', 'Responsibility', decode(to_char(v.level_value), '-1', 'Server', 'Server+Resp')), 'UnDef') LEVEL_SET, decode(to_char(v.level_id), '10001', '', '10002', app.application_short_name, '10003', rsp.responsibility_key, '10004', usr.user_name, '10005', svr.node_name, '10006', org.name, '10007', decode(to_char(v.level_value2), '-1', rsp.responsibility_key, decode(to_char(v.level_value), '-1', (select node_name from fnd_nodes where node_id = v.level_value2), (select node_name from fnd_nodes where node_id = v.level_value2)||'-'||rsp.responsibility_key)), 'UnDef') "CONTEXT", v.profile_option_value VALUE from fnd_profile_options p, fnd_profile_option_values v, fnd_profile_options_tl n, fnd_user usr, fnd_application app, fnd_responsibility rsp, fnd_nodes svr, hr_operating_units org where p.profile_option_id = v.profile_option_id (+) and p.profile_option_name = n.profile_option_name and upper(p.profile_option_name) in ( select profile_option_name from fnd_profile_options_tl where upper(user_profile_option_name) like upper('%MO: Security Profile%')) and usr.user_id (+) = v.level_value and rsp.application_id (+) = v.level_value_application_id and rsp.responsibility_id (+) = v.level_value and app.application_id (+) = v.level_value and svr.node_id (+) = v.level_value and org.organization_id (+) = v.level_value order BY short_name, user_profile_option_name, level_id, level_set; MindMap
参考：
Oracle Applications Multiple Organizations Implementation Guide
EBS R12 MOAC(Multi-Org Access Control)原理探索
MO_GLOBAL-Dive into R12 Multi Org Design
Note 745420.1 -How To Setup And Check MO / MOAC Setup In APPS Instance At R12 Level - Precedence of MO - MOAC Profile Options
Best Practices for Securing the E-Business Suite [ID 189367.1]
Best Practices For Securing Oracle E-Business Suite Release 12 [ID 403537.1]
Understanding and Using HRMS Security in Oracle HRMS [ID 394083.1]
Security List Maintenance for All Profiles Is Excluding Employees [ID 755410.1]
Effect Of Security List Maintenance Concurrent Request within the Oracle HRMS Module [ID 457629.1]
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