| 2.2.3 |
CONSTANTS |
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例如声明一些OK_CODE, SIGN ‘I’,’E’ OPTION ‘EQ’,’BT’等 |
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如值相同,但表示不同意思时,最好使用两个常量 |
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例：CONSTANTS:CNS_BUKRS_XXX TYPE BKPF-BUKRS VALUE ‘1000’,（凭证表头中的公司代码) |
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CNS_KOKRS_XXX TYPE CSKS-KOKRS VALUE ‘1000’.（成本中心中的管理领域) |
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| 2.2.4 |
RANGES |
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DATA : |
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RD_MARA TYPE RANGE OF MARA-MATNR, |
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RH_MARA LIKE LINE OF RD_MARA. |
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| 2.2.5 |
内表的定义 |
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＜TYPES定义＞…① |
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TYPES: |
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BEGIN OF TYP_MARC, |
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MATNR TYPE MARC-MATNR, |
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WERKS TYPE MARC-WERKS, |
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END OF TYP_MARC. |
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TYPES: |
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BEGIN OF TYP_MARA, |
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MATNR TYPE MATNR, |
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WERKS TYPE WERKS_D, |
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END OF TYP_MARA. |
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＜DATA定义＞…② |
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TYPES定后使用DATA声明内表及工作区 |
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DATA: |
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TH_MARA TYPE TYP_MARA, |
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TD_MARA TYPE STANDARD TABLE OF TYP_MARA. |
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| 2.2.6 |
类型 |
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如果是自定义的类型使用TYPE关键字,如果是现有的类型使用LIKE关键字 |
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数值类型,使用的时候一定不要加”以便跟文本类型区分开 |
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例） |
DATA : CTR_OBJECT TYPE I. |
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DESCRIBE TABLE TD_OBJECT LINES CTR_OBJECT |
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IF CTR_OBJECT >= 10000 |
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ENDIF. |
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日期类型,判定空值的时候使用IS INITIAL,而不是使用’00000000′ |
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例） |
| DATA : WK_STARTDAY TYPE SY-DATUM. |
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IF WK_STARTDAY IS INITIAL. |
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ENDIF. |
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CLEAR WK_STARTDAY. |
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