better alternative to header lines, use of logical database, field-symbols
I am wondering if theres a better and faster alternative than declaring a header line for an itab. are work areas faster?
What is the use of logical database? can you please give me an example on how to use it in reports.
how do I use field-symbols? I am confused on how it works.
P.S. I recently installed SAP netweaver preview abap edition
in my home PC and I am wondering if I could practice BDC, user exits, etc. If so, how?
Again, thanks for all your help since I'm kinda new to ABAP.
Alvaro Tejada Galindo replied
I always use this...It uses header lines, but at least is smaller -:)
<b>DATA: BEGIN OF MY_TAB TYPE STANDARD TABLE OF BKPF WITH HEADER LINE.</b>
For logical databases, you can check my blog...I always use LDB for HR programs -:)
LDB's provides a lot of information, because they gather it from a lot of different tables...
A Field-Symbols is like a pointer in C++, like an alias for a variable...Here's a small example...
REPORT Z_ATG_DUMMY. FIELD-SYMBOLS: <F1>, <F2> TYPE I. DATA: TEXT(20) TYPE C VALUE 'Hello, how are you?', NUM TYPE I VALUE 5, BEGIN OF LINE1, COL1 TYPE F VALUE '1.1e+10', COL2 TYPE I VALUE '1234', END OF LINE1, LINE2 LIKE LINE1. ASSIGN TEXT TO <F1>. ASSIGN NUM TO <F2>. DESCRIBE FIELD <F1> LENGTH <F2>. TEXT = 'CHAU'. WRITE: / <F1>, 'has length', NUM. WRITE: / TEXT, 'has length', NUM. ASSIGN LINE1 TO <F1>. ASSIGN LINE2-COL2 TO <F2>. MOVE <F1> TO LINE2. ASSIGN 'LINE2-COL2 =' TO <F1>.
I just can't install SAPNWSP...I only got MiniSap...But I got all the development enviorment...Don't know about the User-Exits...Actually I don't think so...Because those "mini" systems doesn't come with any functional module.