参考地址:[https://www.cnblogs.com/jiangzhengjun/p/4293262.html](https://www.cnblogs.com/jiangzhengjun/p/4293262.html) Field-Symbols 字段符号 在ABAP中,字段符号(Field Symbol)是现有数据对象的占位符或符号名。字段符号本身不直接为数据保留物理空间,而只是指向一个分配了内存空间的数据对象。 字段符号的...
SAP ABAP 编程语言中的 Field Symbol 是一种特殊的数据类型,类似于 C 语言中的指针,它可以用来动态地引用内存中的某个位置。Field Symbol 并不是直接存储数据,而是用来引用某个内存地址,通过它可以直接对目标变量进行操作。Field Symbol 在处理复杂的内存管理、动态内存访问、和性能优化方面非常有用,尤其是在对...
G_DATA1 作为参数,但在两个子程序中通过 field-symbol 成功修改了其值。 打印结果如下: 如果直接把 G_DATA1 作为一个普通变量来改,在语法检查时就通不过的,但如果利用 field-symbol 在运行期来修改就可以成功修改。 同样在 function 中也可以修改。 这个function 没有任何参数。 很有意思,如果碰到增强出口都...
在ABAP中,字段符号(Field Symbol)是现有数据对象的占位符或符号名。字段符号本身不直接为数据保留物理空间,而只是指向一个分配了内存空间的数据对象。字段符号概念有点像C语言中的指针,但又不完全是指针,而是一种已解引用的指针,即用内容操作符“*”引用的指针,可以直接操作字段符号就像真正数据对象一样。如在C语言...
** Field symbols in ABAP are always dereferenced, that is, they always access the referenced data object. If you want to change the reference yourself in ABAP, you can use the ASSIGN statement to assign field symbol <fs1> to field symbol <fs2>. ...
1. loop table时 assigning <fs>, 当你改某个field时， 直接给<fs>赋值就行了， 不用再modify内表 2. 建立动态内表， 这个我也没弄过， 我的同事弄过， 非常强大 3. 当我们写一些inbound interface程序时， 或都是写一些conversion程序时， 经常要测一些field是不是空的， 这时可以用一段...
You can declare field symbols in anyprocedureand in the global declaration section of an ABAP program, but not in the declaration section of a class or an interface. You can use a field symbol in any operand position in which it is visible and which match thetypingdefined usingtyping. ...
Whenever you address a field symbol in a program, you are addressing the field that is assigned to the field symbol. After successful assignment, there is no difference in ABAP whether you reference the field symbol or the field itself. You must assign a field to a field symbol before you...
** Field symbols in ABAP are always dereferenced, that is, they always access the referenced data object. If you want to change the reference yourself in ABAP, you can use the ASSIGN statement to assign field symbol <fs1> to field symbol <fs2>....
memory area for the reference contained in the variable is located in thedata areaof the ABAP program. However, the pointer assigned to a field symbol is exclusively managed by the ABAP runtime environment and is located in the memory area, which cannot be accessed directly in an ABAP ...