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ABAP/4 Data Structures

Field string

Internal tables

ADDRESS

NAME FIRST NAME CITY STREET

ADDRESS_LIST

Header line

NAME FIRST NAME CITY STREET

Internaltable

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TABLES TABNA.

DATA STRUC LIKE TABNA.

DATA : BEGIN OF STRUC,F1( 10 ) TYPE C,F2 LIKE TABNA - COUNTRY,...

END OF STRUC.

DATA : BEGIN OF STRUC.

INCLUDE STRUCTURE TABNA.DATA F1( 10 ) TYPE C.DATA END OF STRUC.

Declaring Field-strings

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Assigning values to Field-Strings fields

MOVE ABC TO STRUC-F1.

STRUC-F2 = XYZ .

ADD 1 TO STRUC-F3.

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Field to Field Transport

000001 JOHN MANILA

ID NAME1 CITY

MOVE STRUC1 TO STRUC2.

STRUC1

000001 JOHN MANILA

ID NAME CITY

STRUC2

MOVE-CORRESPONDING STRUC1 TO STRUC2.

000001 JOHN MANILAID NAME1 CITYSTRUC1

000001 MANILA

COUNTRY ID NAME CITY

STRUC2

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Declaring Internal Tables

DATA : BEGIN OF IT_TAB OCCURS 10,F1 ( 10 ) TYPE C,F2 LIKE TABNA - COUNTRY,...END OF IT_TAB.

DATA : BEGIN OF IT_TABNA OCCURS 10,INCLUDE STRUCTURE TABNA.

DATA : END OF IT_TABNA.

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Filling Internal Tables (I)

APPEND

1

COUNTRY SALES

D 400,000

USA 1,000,000GB 500,000

D 7,800,000

GB 50,000

A 140,000

23

4

5

6

7

89

10

Headerline

COUNTRY SALES

D 400,000

USA 1,000,000GB 500,000

D 7,800,000

GB 50,000

A 140,000

12

3

4

56

7

8

Headerline

APPEND

1

COUNTRY SALES

D 400,000

D 7,800,000USA 1,000,000 2

3

4

5

Headerline

APPEND SORTED BY

GB 500,000

A 140,000

GB 50,000

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Filling Internal Tables (II)

SELECT * FROM TABNA.

MOVE TABNA TO IT_TAB.APPEND IT_TAB.

ENDSELECT.

SELECT * INTO IT_TAB FROM TABNA.APPEND IT_TAB.

ENDSELECT.

SELECT * INTO TABLE IT_TAB FROM TABNA.

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Compressing Internal Table Data

SELECT * FROM TABNA.

MOVE-CORRESPONDING TABNA INTO IT_TAB.COLLECT IT_TAB.

ENDSELECT

COUNTRY SALES

PH 600

USA 100USA 300

HK 400

GB 200

HK 50

COUNTRY SALES

PH 600

USA 400HK 450

GB 200

TABNA

COLLECT

IT_TAB

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Processing an Internal Table

LOOP AT IT_TAB.

(processing statements.)

ENDLOOP.

SY-TABIX

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Processing an Internal Table

AT FIRST - when processing first row

AT LAST - when processing last row

AT NEW f - when contents of field f changes

AT END OF f - just before contents of field f changes

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Reading a Single Table Entry

READ TABLE IT_TAB.

READ TABLE IT_TAB WITH KEY . . .

READ TABLE IT_TAB WITH KEY . . . BINARY SEARCH

READ TABLE IT_TAB INDEX idx . . .

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Changing an Internal Table

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Deleting an Internal Table

CLEAR .Initialize the header line

REFRESH .

Delete all table linesStorage space is not released

Paging is released

FREE .

Delete all table linesStorage space is released

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Information About an Internal Table

REPORT B170D08F.

TABLES: TABNA.

DATA: BEGIN OF IT_TAB OCCURS 5,COUNTRY LIKE TABNA-COUNTY,ID LIKE TABNA-ID,

NAME1 LIKE TABNA-NAME1,SALES LIKE TABNA-SALES,

END OF TAB,LINE_COUNT TYPE I,OCCURS_COUNT TYPE I.

DESCRIBE TABLE IT_TABLINES LINE_COUNTOCCURS OCCURS_COUNT.

.

.

.

.

.

.

DESCRIBE TABLE

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Event Commands (I)

INITIALIZATION

AT SELECTION-SCREEN

START-OF-SELECTION

END-OF-SELECTION

TOP-OF-PAGE

END-OF-PAGE

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Modularization

Internal Subroutine call

External Subroutine call

Function modules

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Using Subroutines

REPORT B170D091.TABLES: . . . .

DATA: . . . ..

.

.

PERFORM USING

....

FORM USING

VALUE ()VALUE ().

ENDFORM.

X Y

X Y

a1 a2 a3 a4

Pass by value

Pass by reference

1 221

1

2

f1 f2

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Processing Internal TablesDATA : BEGIN OF IT - TAB OCCURS 10,

COUNTRY LIKE TABNA-COUNTRY,NAME1 LIKE TABNA-NAME1.

PERFORM SUB1 TABLES IT_TAB.PERFORM SUB2 TABLES IT_TAB.

FORM SUB1 TABLES F_TAB1.LOOP AT F_TAB1.

WRITE : / F_TAB1.ENDLOOP.

ENDFORM.

FORM SUB2 TABLES F_TAB2 STRUCTURE IT_TAB.LOOP AT F_TAB2.

WRITE : / F_TAB2-COUNTRYF_TAB2-NAME1.

ENDLOOP.ENDFORM.

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Function Modules

FM group: FIBU

FM_01 . . .

. . .FM_02

FM group: XYZ

FM_03 . . .

FM_ 04 . . .

Function Library

Function module usage

PROGRAM . . .TABLES . . .

CALL FUNCTIONFB_02EXPORTINGIMPORTING

Function modulemaintenance

AdministrationDocumentationProgramExceptionsTables

ExportImport

InterfaceFB_02