ABAP編程命名規範

0. 通用前綴

通用前綴是標識代碼用途的重要手段，通常在項目中會以項目名作爲一種通用的前綴；在SAP系統中也是類似的，例如使用FI，MM等模塊作爲通用前綴。

• SAP前綴舉例：FI_xxx
• 項目前綴舉例：ABC_xxx

通用前綴在下文將使用<general prefix>或<prefix>表示。

注：對於客戶定製的代碼，對象的命名空間爲Y或Z。

1. 類的命名（Class）

1.1 全局類 (Global Class)

Name	Class
CL_<prefix>_	Standard Class
CF_<prefix>	Factory Class
CX_<prefix>_	Exception Class
IF_<prefix>_	Interface
TC_<prefix>_	Global Test Class
TD_<prefix>_	Global Test Double
TH_<prefix>_	Global Test Helper Class

1.2 局部類（Local Class）

Name	Class
LCL_	General local class
LTC_	ABAPUnit: Test class
LTD_	ABAPUnit: Test Double
LTH_	ABAPUnit: Helper Class

1.3 方法名 （Methods）

Type	Pattern	Examples
變量訪問 Attribute Accesses	SET_<attribute_name> GET_<attribute_name>
Check方法 (with exceptions)	CHECK_<objective>
事件 Events	<noun>_<participle>	BUTTON_PUSHED, DOCUMENT_POSTED
通用方法 General Methods	<verb>_<noun>	GET_STATUS, DETERMINE_DUE_DATE
返回方法 Return a boolean value (without exceptions)	IS_<adjective> HAS_<adjective> EXISTS_<adjective>
事件響應方法 Methods that handle an event	ON_<event_name>

2. 屬性命名和變量命名

通用的命名規則即：<Attribute Type><Data Type>_

2.1 屬性類型的命名

<Attribute Type>	Description	Remarks
G	Global Attribute	Constants, Static attributes
M	Instance Attribute	Object member
L	Local Attribute	Declared in method, form, function module, etc.
I	Importing Parameter	Interface of method, form, function module
E	Exporting Parameter	Interface of method, form, function module
C	Changing Parameter	Interface of method, form, function module
R	Returning Parameter	Interface of method

2.2 數據類型的標識

<Data Type>	Description	Remarks
C	Constant
D	Data	Only relevant for parameters or field symbols with a generic type
O	Object Reference	Ref to class, interface, BAdI
R	Data Reference
S	Structure
T	Internal Table	Table, Range (internal tables with special structure)
V	Field	Any atomic value type (string, char, numc, int, dec, float, ...)
X	Object Reference to Exception Class

2.3 命名舉例

iv_value_date	date for value date field as an importing parameter
es_result	a strucute as a exporting parameter
ct_name	an internal table as changing parameter with names
mo_instance	an object as a class's attribute
<ls_invoice>	invoice structure as a locally used field-symbol
gc_costc_main	main cost center defined as a global constant

3. 數據類型的定義命名

Prefix	Type
TY_	Field
TS_	Structure
TT_	Standard Table, Index Table
TTS_	Sorted Table
TTH_	Hashed Table
TTA_	Any Table
TM_	Mesh

4. DDIC數據字典對象

Object	Prefix	Remarks
Database Table	<general_prefix>_	Short version of general prefixed used because table name length is rather short.
Views	V_<table name>	Name of the leading table
View Cluster	VC_<name>
Data Elements, Domains	<general_prefix>_	If Domain only used for one data element then domain name should be same as data element.
Structures	<general_prefix>_S_
Range Structures	<general_prefix>_S_RANGE_
Table Types	<general_prefix>_T_
Enqueue Objects	E<general_prefix>_

5. 屏幕的parameter和select-options

Prefix	Description
P_	Parameters
S_	Select-Options

6. 其它數據對象

Object	Prefix	Remarks
Message Classes, Reports, Transactions	<general prefix>_
Includes	I<general prefix>_
Includes for unit tests	UT_<general prefix>_	Same name as for class to be tested. Instead of CL_ use UT_
PFCG Roles	<general_prefix>_
Authorization Objects	F_<general prefix>_