Field symbols in ABAP are similar to pointers in other programming languages. However, pointers (as used in PASCAL or C) differ from ABAP field symbols in their reference syntax. The statement ASSIGN f to <fs> assigns the field f to field symbol <fs>. The field symbol <fs> then "points...
[SAP ABAP开发技术总结]字段符号FIELD-SYMBOLS 一说到字段符号FIELD-SYMBOLS,就要与C/C++中的指针扯在一起了,使用时无需值的拷贝,直接指向并操作某个内存区,程序效率是大大的提高,所以字段符号是每个ABAP顾问都必须掌握的知识,可以这么说吧,如果你不懂ABAP字段符号FIELD-SYMBOLS,就像不懂C/C++的指针一样,程序是可...
**In ABAP, if you assign a field symbol <fs1> to a field symbol <fs2>, <fs1> takes the value of the data object to which <fs2> refers (value semantics). **Field symbols in ABAP are always dereferenced, that is, they always access the referenced data object. If you want to change...
FIELD-SYMBOLS: <f1> STRUCTURE line1 DEFAULT wa, <f2> STRUCTURE line2 DEFAULT wa. * correct --- FIELD-SYMBOLS <f3> LIKE line1. ASSIGN wa TO <f3> CASTING. FIELD-SYMBOLS <f4> LIKE line2. ASSIGN wa TO <f4> CASTING. * --- WRITE: / <f1>-col1, <f1>-col2, <f1>-col3,...
The flexibility of field symbols provides elegant solutions to certain problems. On the other hand, it does mean that errors can easily occur. Since fields are not assigned to field symbols until runtime, the effectiveness of syntax and security checks is very limited for operations involving fiel...
在SAP开发项目,这两个概念开发人员基本都知道。但是没有去对比其性能区别。首先,我们普及一下原理。Workarea: 相当于在内存堆栈里面开辟了一块内存。Field ...
REPORT demo_field_symbols_stat_as_of2 . FIELD-SYMBOLS <fs> TYPE ANY. DATA: BEGIN OF line, a TYPE c VALUE '1', b TYPE c VALUE '2', c TYPE c VALUE '3', d TYPE c VALUE '4', e TYPE c VALUE '5', f TYPE c VALUE '6', ...
Field symbols to which data objects or parts of data objects are assigned in theheapare memory-preserving, likeheap references. From a technical perspective, the field symbols are implemented by references or pointers, which are comparable to references indata reference variables. A data reference ...
SAP Managed Tags: ABAP Development Hi, Syntax FIELD-SYMBOLS <fs> { typing | STRUCTURE struc DEFAULT dobj }. Extras: 1. ... typing 2. ... STRUCTURE struc DEFAULT dobj Effect The FIELD-SYMBOLS statement declares a field symbol <fs>. The naming conventions apply to the name fs...
跟有没有表头没关系 习惯写有表头的 没表头的自己去写 ITAB是原始数据表 ITAB2是中转表 ITAB3是最后结果表 DATA: BEGIN OF ITAB OCCURS 0,COL1 TYPE I,COL2 TYPE I,COL3 TYPE I,FLAG TYPE CHAR1,END OF ITAB.ITAB-COL1 = 1.ITAB-COL2 = 2 .ITAB-COL3 = 3.APPEND ITAB.I...