About Variable:
1.Variable 是和InfoObject綁定的，可用于任何含有該IO的query中。
2.Variable有以下幾種類型：
Characteristic：用于限制Char。?
Text：用于在報表動態(tài)顯示文本。?
Hierarchy：用于限制Hierarchy。?
Hieararchy Node：用于限制Hierarchy Node。?
Formula: 可以在公式中使用變量，讓用戶輸入一個數(shù)，讀取某個Char.的屬性（例如Prduct的price屬性)等來用于計算。?
Offset的應用：設(shè)置偏移量
SAP BI Content內(nèi)置了很多標準變量。當其無法滿足需求時，有時僅僅需要設(shè)置下偏移量就可以滿足需求了。
例如系統(tǒng)已經(jīng)有了當前月份的變量，通過偏移就可以獲得上N個月和下N個月的變量，無需增強。
?
定義Customer Exit Variables（BW 3.x ，BI7 類似）
客戶出口變量可以通過程序來處理變量邏輯。定義過程如下：
1.在query designer中，右鍵單擊要建立變量的characteristic,選擇New variable.
2.設(shè)置為customer exit類型
3.進入CMOD，修改：Enhancement?? Exp? RSR00001 BI: Enhancements for Global Variables in Reporting-->Function exit??? EXIT_SAPLRRS0_001-->INCLUDE ZXRSRU01 。該Function Module 將在query運行時被調(diào)用多次。
3-1：調(diào)用前，系統(tǒng)將其他變量的當前值保存在內(nèi)表 I_T_VAR_RANGE中。The table type is RRS0_T_VAR_RANGE, and row type RRS0_S_VAR_RANGE references structure RRRANGEEXIT.This structure has the following fields:?
Field??????????????????????????????????? ?Description
?
VNAM????????????????????????????????? ?Variable name
?
IOBJNM?????????????????????????????????InfoObject name
?
SIGN??????????????????????????????????????(I)ncluding [ ] or (E)xcluding ] [
?
OPT????????????????????????????????????? Operators: EQ =, BT [ ], LE <=, LT <, GE >=, GT >, CP, and so on
?
LOW???????????????????????????????????? ?Characteristic value
?
HIGH???????????????????????????????????? ?Characteristic value of upper limit for intervals or node InfoObject for hierarchy nodes
?3-2：每次調(diào)用時，系統(tǒng)會傳遞參數(shù)值給Function Module。其中，比較重要的參數(shù)如下：

I_STEP 標識了該調(diào)用發(fā)生的時機：

?I_STEP = 1: Call is made directly before variable entry.
I_STEP = 2: Call is made directly after variable entry. This step is only executed if the same variable is not input-ready and could not be filled for I_STEP = 1.
I_STEP = 3: In this call, you can check the values of the variables. When an exception (RAISE) is triggered, the variable screen appears again. I_STEP = 2 is then also called again.
?I_STEP = 0: The enhancement is not called from the variable screen. The call can originate from the authorization check or from the monitor.
I_VNAM標識了當前要處理的變量。

3-3：完成變量的處理之后，應將變量的值寫入E_T_RANGE。

Sample Code:
DATA: L_S_RANGE TYPE RSR_S_RANGESID.
DATA: L_S_VAR_RANGE TYPE RRRANGEEXIT.?
CASE I_VNAM.??
???? WHEN 'CUMMONTH'.
??????? IF I_STEP = 2. "after the popup?
??????????? READ TABLE I_T_VAR_RANGE INTO L_S_VAR_RANGE WITH KEY VNAM = 'MONTH'.
??????????? IF SY-SUBRC = 0.
??????????????????? CLEAR L_S_RANGE.
??????????????????? L_S_RANGE-LOW = LOC_VAR_RANGE-LOW(4)."low value, for example, 200601
??????????????????? L_S_RANGE-LOW+4(2) = '01'.
??????????????????? L_S_RANGE-HIGH = LOC_VAR_RANGE-LOW. "high value = input
??????????????????? L_S_RANGE-SIGN = 'I'.
??????????????????? L_S_RANGE-OPT = 'BT'.
?????????????????? APPEND L_S_RANGE TO E_T_RANGE.
??????????????? ENDIF.
??????? ENDIF.
ENDCASE.

查看SAP Exit變量?
SAP Exit變量為我們編寫customer exit變量提供了很好的參考。
1. SE16 查看表 RSZGLOBV 可以得到系統(tǒng)全部變量的列表，選擇process type=SAP Exit，即可獲得所有的SAP Exit變量列表
2. SE37 查看 RREX_VARIABLE_EXIT 或RSVAREXIT_ * 可以找到SAP Exit變量的代碼

轉(zhuǎn)載于:https://www.cnblogs.com/hanmos/p/3429532.html

總結(jié)

以上是生活随笔為你收集整理的SAP Study Notes: BW Queriy-Variables(变量）的全部內(nèi)容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網(wǎng)站內(nèi)容還不錯，歡迎將生活随笔推薦給好友。