FTPC对象引用规则

一、实现原理

在FTPC服务端（EJB）中有一个对象引用模块来验证对象是否被其他对象引用，通过该模块来校验被引用的对象能否进行删除、修改操作，从而保证数据的引用完整性。这样通过应用层实现引用完整性约束，可以不依赖于数据库通过外键实现引用完整性约束。

1、关于FTPC引用模块校验实现原理，主要是通过表结构中字段来统计是否存在引用的对象来判断。校验各个对象是否被引用，会查询各自相关的表中是否存在引用，基本引用关系如下：

Access Privilege：

Application：只会在List和Parameter中被引用

Area：AREA_AREA、SITE_AREA

Bill of Materials：WORK_ORDER_ITEMS、CONSUMPTION_PLAN

CarrierClass：

Data Collection Set：

Data Dictionary：

Equipment：EQUIPMENT_CLASS_EQUIP、WORK_CENTER_EQUIPMENT、WC_RS_EQUIP_REL

EquipmentClass：

Location：LOCATION

Part：PART_CLASS_PART、BOM_PART_LIST、PROCESS_BOM_ITEM

User Group：ACCESS_PRIVILEGE_GROUP、APPLICATION_ITEM

······

2、AT Row引用，引用关系表：APP_TABLE、APP_TABLE_COLUMN

3、Parameter引用，引用关系表为：PARAMETER。

3、List对象引用其他构建时对象，引用关系表为：DS_LIST、DS_LIST_ITEM。

二、引用对象详细关系

一旦存在子对象被父对象引用，则对子对象的删除、修改操作将被影响，但可以删除父对象，删除父对象的时候也将删除父对象与子对象的引用关系。

Parent Object	Child Object
Access Privilege	User Group
Application	All Process Designer objects
Area	Area, Location, Production Line, Storage Zone, Work Instruction, Work Schedule
Bill of Materials	Part, Work Instruction
CarrierClass	Carrier
Data Collection Set	Work Instruction
Data Dictionary	Message
Equipment	Location, Resource Route, Work Instruction, Work Schedule
EquipmentClass	Equipment
Location	Location
Part	Bill of Materials, Account, CarrierClass, Work Instruction
PartClass	Part
Process Bill of Materials	Part, Work Instruction
Production Line	Carrier, Location, Production Queue, Resource Route, Storage Unit, Work Center, Work Instruction, Work Schedule
Production Queue	Location, Work Instruction
Report Data Definition	Message
Report Design	Report Data Definition
Resource Condition	Data Collection Set, Form, Image, Work Instruction
Resource Route	Form, Work Instruction
Route	Form, Production Line, Route Operation, Work Instruction
Route Operation	Checklist Definition, Data Collection Set, Form, Image, Work Instruction
Site	Area, Location, Work Instruction, Work Schedule
Station	Form, Location, Work Center, Work Instruction
Storage Unit	Location and PartClass
Storage Zone	Carrier, Location, Storage Unit
Test Definition	List, Work Instruction
User	Form, Shift
User Group	Shift
Work Center	Carrier, Equipment, Location, Resource Route, Storage Unit, Work Instruction, Work Schedule