ITEC3612 Enterprise Architecture and Resource Planning (Lab) ABAP Programming (1)
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Transcript of ITEC3612 Enterprise Architecture and Resource Planning (Lab) ABAP Programming (1)
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ITEC3612
Enterprise Architecture and
Resource Planning (Lab)
ABAP Programming (1)
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What is ABAP ?What is ABAP ? ABAP = Advanced Business Application
Programming Similarities with Cobol and Pascal Established in 1980 Since 1998 object oriented ABAP objects established Fully compatible to older versions Multilanguage support Embedded SQL statements Platform independent Database independent Reusability of code fragments
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Machine code
Assembler
Fortran Cobol
LISP
Smalltalk Pascal
C++
Java
ABAP
ABAP Objects
PL1
1950
1954
1968
1980
1992
….
….
….
….
Source: Following SAP AG
Historical view on ABAP
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Presentationlayer
Applicationlayer
Databaselayer
SAPGui
Applicationserver
ABAPSource
code
ABAPCompilation
Databaseserver
Calls program for the first time
Program has to be compiled
Short messageabout compiling
Compiling
Return compilation
Runs program
Source: Following SAP AG
SAPGui
Applicationserver
Databaseserver
SAPGui
Applicationserver
Databaseserver
Compiling ABAP
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Every tool can be accessed in Object Navigator
Development tools in SAP
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Tools (1)
Menu path Tools • ABAP workbench • Development • ABAP Editor
Transaction code: SE38 Run, view, edit, activate, check ABAP
code Integrated into Object Navigator
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Tools (2)
Function Builder: Menu path Tools • ABAP workbench •
Development • Function Builder (SE37)
Create and edit function modules / groups
Class Builder: Menu path Tools • ABAP workbench •
Development • Class Builder (SE24) Create and edit new global classes
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Tools (3)
Screen Painter: Menu path Tools • ABAP workbench •
Development • User Interface • Screen Painter (SE51)
Create and edit DynPro’s Separate programs which is only
installed when using SAPGui for Windows
Menu Painter: Menu path Tools • ABAP workbench •
Development • User Interface • Menu Painter (SE41)
Create, edit menu’s, header's and toolbar’s in ABAP programs
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Tools (4)
Debugger: Execution of ABAP program step-by-step Variable values during runtime Breakpoint: program execution will be
paused when getting to breakpoint Watchpoint: program execution is
paused only when variable has defined value
Debugging can be activated by suffix /h Test program: Program • Test •
Debugging
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Tools (5)
Dictionary : SE11
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ABAP System Fields : Structure SYST (SE11)
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Tools (6) Object Navigator integrates all
development tools (SE80)
Navigation tree(independent)
Browsers(independent)
Toolbar (context sensitive)
Working space (context sensitive)
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editor
Transaction Code : SE38
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Editor (1)
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Editor (2)
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Editor (3)
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Editor (4)
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Editor (5)
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Editor (6)
Ctrl + F2 = Check Syntax F8 = Direct Processing Ctrl + S = Save Ctrl + F3 = Activate Ctrl + F1 = Change <->
Display
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Editor (7) Long running programs may decrease the system
performance Sometimes infinite loops Termination of long running dialog program:
Click on SAP icon Choose ‘Stop Transaction’
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Debugging
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Debugging (2)
Single step F5 Execute F6 Return F7 Run F8
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Structure of Language Each statement must end with a period
DATA tmp TYPE I.WRITE ‘Hello World’. WRITE ‘OK’.
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Structure of Language (2)
Successive statements that have the same string segment can be combined to form a single chained statement
To do so, you specify the identical starting segment once and conclude it with a colon (:), the remaining segments are then listed, separated by commas (,) and concluded with a period (.)
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Structure of Language (3)
Comments Full Line Comment (*) Partial Line Comment (“)
ABAP command is not case sensitive
SAP Program Name must use Y or Z at thefirst character.
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Data Objects in ABAP
Memory Space
Structure
Table Structure Internal Table
Variable
Constants <Field-symbols>
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Variable
Variables can be declared at any point in a program
Variables can be up to 30 characters in lengthREPORT ZTEST.
DATA firstname TYPE STRING.firstname = ‘John’.
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Predefined ABAP Data Types
Type Description Initial Value
C
D
F
I
N
P
T
X
String
xstring
Character
Date
Floating Point
Integer
Numeric Text
Packed Decimal
Time
Hexadecimal
Variable-length
Variable-length Hexadecimal
Space
‘00000000’
00
0
‘0’
0
‘000000’
’00’
Space
Blank string
Length
1 – 65535
8 characters
8 bytes
4 bytes
1 – 65535
1 – 16 bytes
6 characters
1 – 65535
Variable
Variable
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Defining Variable with DATA Statement
* SyntaxDATA var[(length)] [Type type] [Decimals number].
DATA var LIKE Table-Field [VALUE initial value].
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Defining Variable with DATA Statement
* Data Declaration
DATA: tmp(10) TYPE C,
tmp1 TYPE I,
tmp2(8) TYPE P DECIMALS 2 VALUE ‘1.50’.
DATA: tmp3(5) TYPE N,
tmp4.
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Defining Variable with DATA Statement
DATA customerno TYPE customers-id.DATA matnr TYPE mara-matnr.
* Data DeclarationDATA customerno LIKE customers-id.DATA matnr LIKE mara-matnr.
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Variable
Data Type C,N and X length between 1 – 65535 (Default 1)
Data Type P length between 1 – 16 (Default 8) and decimals length between 0 – 31
Data Type I value between – 231 to 231 – 1
or –2,147,483,648 to 2,147,483,647
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Data Declaration & Value Assignment
DATA tmp(5) TYPE C value 'Hello World'.DATA tmp2 TYPE P DECIMALS 4.DATA tmp3 TYPE I.: tmp2 = '12345.45345', tmp3 = 30.write tmp.write: / 'tmp2', tmp2 , tmp2 DECIMALS 2. Write: / 'tmp3 ' ,tmp3.data tmp4(5) type N.tmp4 = 'Xca9yy23K6'.Write / tmp4.
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TYPES tname(10) TYPE c.DATA: fname TYPE tname, lname TYPE tname. DATA: tmp1 TYPE i, tmp2 TYPE i.tmp1 = tmp2 = 10.: fname = 'uraiporn' , lname = 'jettanachai'.write : / 'firstname => ' , fname. write : 'lastname =>' ,lname.write : /'tmp1 => ' , tmp1 ,'tmp2 => ',tmp2.
Data Declaration & Value Assignment
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DATE
* Fixed Length 8
* Include Representation ‘YYYYMMDD’
DATA today TYPE D.
today = sy-datum.
WRITE today.
today = ‘19991231’.
WRITE today.
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TIME
* Fixed Length 6
* Format ‘HHMMSS’
DATA times TYPE T.
times = sy-uzeit.
WRITE times.
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xx
* Value assignment
DATA: name1(30),
first_num TYPE I,
next_num TYPE I.
MOVE ‘XXXX’ TO name1.
MOVE 5 TO first_num.
COMPUTE next_num = first_num + 5.
name1 = ‘SAP’.
ADD 1 TO next_num.
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Structure
* Syntax
DATA BEGIN OF <structure name>.
DATA field1.
DATA field2.
…
…
DATA END OF <structure name>.
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* Syntax
DATA BEGIN OF wa.
DATA id LIKE customers-id.
DATA name LIKE customers-name.
DATA city LIKE customers-city.
DATA END OF wa.
MOVE 9 TO wa-id.
WRITE wa-id.
id city
wa
name
Structure
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Defining Structure (Include Structure)
* Include StructureDATA BEGIN OF wa. INCLUDE STRUCTURE customers.DATA tel(7).DATA END OF wa.
wa-id = 10.wa-tel = 1234567.write : / wa-id , wa-tel.
id city
wa
name tel
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Defining Structure
* LIKE option
DATA wa LIKE customers.
wa-id = 1.
wa-name = ‘John’.
WRITE: wa-id, wa-name.
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Constants
* Constant variable
CONSTANTS max_no TYPE I VALUE 999.
DATA counter TYPE I VALUE max_no.
WRITE: max_no, counter.
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Constants Using Example
* Constant variable
CONSTANTS ctext(11)TYPE C VALUE ‘Hello World’.
WRITE ctext.
WRITE ctext.
WRITE ctext.
WRITE ctext.
WRITE ctext.
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System Fields The system fields (structure syst) are filled by
the runtime environment. You can use them to query the system status in an ABAP program
You should access them only for reading sy-datum = Current date of application
server sy-uzeit = Current time of application
server sy-datlo = Current date of SAP GUI sy-timlo = Current time of SAP GUI sy-mandt = Current client logon sy-subrc = Return value of ABAP statement
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DATA wa LIKE customers.
DATA vender LIKE customers.
wa-id = ‘1234’.
wa-name = ‘Test#1’.
MOVE wa TO vender.
WRITE: vender-id, vender-name.
MOVE Statement
“vender = wa.
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MOVE-CORRESPONDING Statement
DATA: begin of wa1, f1,f2,f4, end of wa1. DATA: begin of wa2, f2,f1,f3, end of wa2. wa1-f1 = 'A'. wa1-f2 = 'B'. wa1-f4 = 'C'. wa2-f2 = 'D'. wa2-f1 = 'E'. wa2-f3 = 'F'.MOVE-CORRESPONDING wa1 TO wa2.WRITE : wa2-f2,wa2-f3 .
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Field-symbols
Data: name(4) Value 'Test', num Type I Value 10, today Type D Value '19980429'.Field-symbols <temp>.Assign name To <temp>.Write <temp>.Assign num To <temp>.Write <temp>.Assign today To <temp>.Write <temp>.
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Field-symbols : UNASSIGNField-symbols : UNASSIGN
data: name(4) Value ‘Test’,
field-symbols <temp>.
assign name To <temp>.
write <temp>.
unassign <temp>.
write <temp>.
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CLEAR StatementCLEAR Statement
CLEAR <data object>.
DATA tmp type i value 9.tmp = 10.CLEAR tmp.
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CLEAR StructureCLEAR Structure
DATA wa like customers.…CLEAR wa.
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Report Statement
* Syntax
REPORT <report name>
[NO STANDARD PAGE HEADING]
[LINE-SIZE no of columns]
[LINE-COUNT no of lines[(no of footer)]].
REPORT ztest1 NO STANDARD PAGE HEADING.REPORT ztest LINE-SIZE 132 LINE-COUNT 65(2).
sy-linsz
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Text Element : Title&Headers
Text Element Title and Headers
List Header
Column Header
This is test program by uraiporn
Column Column #1 #2
Report ztest.
Write ‘Hello World’.
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Text Symbol
Text Element Text Symbols Text Symbol Text
Text 2
Text 1
Report ztest.
Write: Text-001,
Text-002.
001
002
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write: / Text-001.
Text Symbol
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Creating Lists ABAP statement that create list
WRITE SKIP ULINE
The complete report list will appears automatically at the end of the processing block
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List Buffer
Dialog WP
TaskHandler
Dynpro Processor
ABAP Processor
Local Memory
Memory Space
DB Interface
List BufferWRITE,SKIP,ULINE
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WRITE StatementWRITE Statement
* Write data
WRITE ‘Hello World’.WRITE: ‘OK’, ‘Test data’.WRITE: /15(10) ‘ABCDEFGHIJKLMNOPQ’.WRITE /20 ‘Test data’.WRITE / text-001.
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Breaking to a New Line
* Write data
WRITE: / ‘First Line’, ‘Data 1’, / ‘Second Line’, ‘Data 2’, /(20) ‘Third Line’, ‘Data 3’, /35 ‘Fourth Line’, ‘Data 4’.
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Column Position
DATA colno type I value 10.
write: /5 ‘Hello’, at colno ‘World’.
write: at /colno ‘OK’.
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Options of the WRITE Statement
* Write Syntax
WRITE var [NO-ZERO]
[NO-SIGN]
[NO-GROUPING]
[NO-GAP]
[DECIMALS no of decimals]
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Suppressing Blanks(NO-ZERO)
* No Zero
DATA: number(10) TYPE N VALUE 23.
WRITE: number, number NO-ZERO.
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Suppressing Number(+ / -) Sign
* No Sign
DATA: v_integer TYPE I VALUE -1.
WRITE: v_integer, v_integer NO-SIGN.
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NO-GROUPING
* No grouping
DATA: v_integer TYPE I VALUE 120000.
WRITE: v_integer, v_integer NO-GROUPING.
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NO-GAP
* No gap
WRITE: ‘Hello’ NO-GAP, ‘World’.
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Formatting Options
* Format options of WRITE statement
* LEFT-JUSTIFIED for Integer data
* RIGHT-JUSTIFIED for Character data
* CENTERED
Data tmp1(20) value ‘test’.
WRITE: tmp1 CENTERED.
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Inserting Blank Lines(SKIP)*Skip Statement
SKIP.
WRITE: ‘Hello World’, sy-linno.
SKIP.
WRITE: ‘Test 1’.
SKIP 5.
WRITE: ‘Test 2’.
SKIP TO LINE 20.
WRITE ‘This is line 20’.
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Inserting Horizontal Lines(ULINE)
* Uline
WRITE: ‘Hello World’.
WRITE: /5(35) sy-uline, sy-vline.
ULINE /5(35).
ULINE.
WRITE: / ‘This is an underline’.
ULINE /(18).
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Frame
uline: /(45).write: /1 sy-vline, 'Column #1', 15 sy-vline, 'Column #2', 30 sy-vline, 'Column #3', 45 sy-vline.uline: /(45).
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Exercise I
sy-datumsy-uzeit
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FORMAT Statement
FORMAT [INTENSIFIED]
[INTENSIFIED OFF]
[COLOR <color>]
[COLOR OFF]
[HOTSPOT ON]
[HOTSPOT OFF]
[RESET]
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FORMAT COLOR
FORMAT COLOR col_heading. “color 1 FORMAT COLOR col_normal. 22 FORMAT COLOR col_total. 23 FORMAT COLOR col_key. 24 FORMAT COLOR col_positive. 25 FORMAT COLOR col_negative. 26 FORMAT COLOR col_group. 27 FORMAT COLOR col_background. 222222 222
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FORMAT COLOR (2)
format color col_positive intensified on.write : / ' SAP '. format color col_positive intensified off.write : / ' SAP '. FORMAT HOTSPOT ON. WRITE: / 'Hello ABAP', 'Hi!'.FORMAT HOTSPOT OFF.format color 3.write : / ' SAP '. format color off.write : / ' SAP '.
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Flow Control in ABAP
Branching ==> IF, CASE. Looping ==> DO, WHILE.
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IF Statement
IF <Condition>.
<Statement Block>
ELSEIF <Condition>.
<Statement Block>
ELSEIF <Condition>.
<Statement Block>
ELSE.
<Statement Block>
ENDIF.
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IF Statement
IF sy-mandt = ‘100’. WRITE: / ‘This is Production Client’.ELSEIF sy-mandt = ‘800’. WRITE: / ‘This is Development Client’.ELSE. WRITE: / ‘This is Test Client’.ENDIF.
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Invalid Date
DATA: today TYPE D.
today = ‘20061321’.
today = today + 0.
if today is initial.
write: / ‘invalid date’.
else.
write: / today.endif.
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CASE Statement
CASE <field>.
WHEN <value1>.
<Statement Block>
WHEN <value2>.
<Statement Block>
...
WHEN OTHERS.
<Statement Block>
ENDCASE.
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CASE Statement
CASE sy-mandt. WHEN ‘100’. WRITE: / ‘Production Client’. WHEN ‘800’. WRITE: / ‘Development Client’. WHEN OTHERS. WRITE: / ‘Test Client’. ENDCASE.
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DO Statement
DO.
WRITE sy-index.
IF sy-index = 3.
EXIT.
ENDIF.
WRITE: sy-index.
ENDDO.
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CONTINUE Statement
DO 5 TIMES.
IF sy-index = 3.
CONTINUE.
ENDIF.
WRITE: sy-index.
ENDDO.
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CHECK Statement
DO 4 TIMES.
CHECK sy-index BETWEEN 2 AND 3.
WRITE: sy-index.
ENDDO.
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WHILE Statement
DATA: count TYPE I value 1.
WHILE count <> 4.
WRITE: sy-index.
count = count + 1.
ENDWHILE.
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Logical ExpressionsOperator Meaning
=,EQ EQUAL<>,NE NOT EQUAL<, LT LESS THAN<=, LE LESS THAN OR EQUAL>, GT GREATER THAN
>=, GEGREATER THAN OR EQUAL
BETWEEN … AND ….check whether the value of a field lies within a particular range.
IS INITIALcheck whether the value of a field is initial:
IS ASSIGNEDcheck a field is assigned to a field symbol
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Operators/Function Meaning
+ Addition
- Subtraction
* Multiplication
/ Division
** Powers
DIV Integer division
MODRemainder of integer division
SQRT Square root.
Arithmetic Expressions
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Character String Operator
CO (contains only) CN (contains not only) CA (contains any) NA (contains not any) CS (contains string) NS(contains no string) CP (convers pattern) NP (no pattern)
Case-sensitive
Not case-sensitive
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Character String Operator (2)
if 'ABCE' cN 'ABCDE'. write : / 'true'.else. write : / 'false'.endif.
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if ‘AABB’ co ‘AB’.
if ‘ABCD’ co ‘ABC’.
if ‘AXCZ’ ca ‘AB’.
if ‘ABCD’ ca ‘XYZ’.
if ‘ABCD’ cp ‘+B*’.
Character String Operator (3)
T
F
T
F
T
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Character String Operator (4)
'BD ' CO 'ABCD ‘
'BD ' CO 'ABCDE'
'ABC12' CN 'ABCD ‘
'ABABC' CN 'ABCD '
'ABcde' CA 'Bd '
'ABcde' CA 'bD '
'ABAB ' NA 'AB '
'ababa' NA 'AB '
T
F
T
F
T
F
F
T
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Character String Operator (5)
'ABcde' CS 'bC '
'ABcde' CS 'ce ‘
'ABcde' NS 'bC '
'ABcde' NS 'ce '
'ABcde' CP '*b*'
'ABcde' CP '*#b*'
'ABcde' NP '*b*'
'ABcde' NP '*#b*‘
T
F
F
T
T
F
F
T
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* Substrings with offsets
DATA tmp(10) VALUE ‘ABCDEFGHIJ’.DATA tmp1(2).WRITE: tmp+3(7),
tmp+1(4),
tmp+0(8),
tmp+7(3).MOVE tmp+4(2) TO tmp1.WRITE: tmp1
Manipulating Character Data
DEFGHIJ
BCDE
ABCDEFGH
HIJ
EF
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SHIFT Statement* SHIFT Statement
DATA tmp(8) VALUE ‘12345’.
SHIFT tmp.
SHIFT tmp BY 2 PLACES.
SHIFT tmp BY 2 PLACES CIRCULAR.
SHIFT tmp UP TO ‘3’.
SHIFT tmp UP TO ‘3’ RIGHT.
SHIFT tmp UP TO ‘3’ RIGHT CIRCULAR.
SHIFT tmp RIGHT DELETING TRAILING SPACE.
SHIFT tmp LEFT DELETING LEADING SPACE.
2345____
345_____
345___12
_____123
345_____
45___123
___12345
12345___
กว้�าง 8
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* Shift
DATA name(30) VALUE ‘Alexander Bill Charles’.
SHIFT name UP TO ‘Bill’.
WRITE: / name.
Bill Charles
SHIFT Statement (2)
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* SearchDATA tmp(5) VALUE ‘ABCDE’.SEARCH tmp FOR ‘C’.
DATA tmp1(10) VALUE ‘Till Bill’.SEARCH tmp1 FOR ‘Bill’.IF SY-SUBRC = 0. WRITE: / SY-FDPOS.ENDIF.
SEARCH(Non -Case sensitive)
5
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TRANSLATE
* Translate
DATA tmp(5) VALUE ‘abc ‘.TRANSLATE tmp TO UPPER CASE.TRANSLATE tmp TO LOWER CASE.TRANSLATE tmp USING ‘ 0’.TRANSLATE tmp USING ‘ 0aA’.
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REPLACE
* Replace DATA tmp(20) VALUE ‘I was a boy’.REPLACE ‘was’ WITH ‘am’ INTO tmp.IF sy-subrc = 0. write ‘Replace OK’.ELSE. write ‘Cannot find data to be replaced’.ENDIF.
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* CondenseDATA: tmp(20) VALUE ‘I am a boy’.
CONDENSE tmp.
CONDENSE tmp NO-GAPS.
Removing Spaces(CONDENSE)
I am a boy
Iamaboy
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* ConcatenateDATA: tmp1(2) VALUE ‘AB’, tmp2(3) VALUE ‘CDE’, tmp3(10).CONCATENATE tmp1 tmp2 INTO tmp3.
CONCATENATE tmp1 tmp2 INTO tmp3 SEPARATED BY ‘ ‘.
Concatenation String(CONCATENATE)
ABCDE
AB CDE
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* SplitDATA: name(30) value ‘David, John, Peter’, one(10), two(10), three(30).split name at ‘,’ into one two three.
Split
David _John _Peter
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Working with Date Variables
* DateDATA today TYPE D.today = sy-datum.WRITE: today, ‘Year :’ , today+0(4), ‘Month :’ , today+4(2), ‘Day :’ , today+6(2).
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WRITE … TO …DATA: today TYPE D, tmp(10).
today = sy-datum.
tmp = today.
WRITE tmp.
WRITE today TO tmp.
WRITE tmp.
CLEAR today.
WRITE today NO-ZERO TO tmp.
WRITE tmp.
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Built-in Functions ABAP provides a lot of built-in functions A Built-in function calculates a return
value from an argument abs = Absolute value of
argument sign = +/- sign of argument sqrt = Square root strlen = Number of characters in
arg
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STRLEN Built-in Function
DATA: tmp(20) VALUE ‘Test String’,
count TYPE I.
count = strlen( tmp ).
WRITE count.
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STRLEN Built-in Function ExampleDATA: tmp(20) VALUE ‘xxax’,
cntlen TYPE I.
cntlen = strlen( tmp ).
cntlen = cntlen – 2.
if tmp+cntlen(1) = ‘a’. “cntlen >= 0
write: / ‘OK’.
endif.
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WRITE ‘
*If we need the word like this I’m a boy WRITE: ‘I’’m a boy’.
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* Display Icon or Symbol in List 2< LIST>. : / ‘ :’ , SYM_PHONE AS SYMBOL.
WRITE: / ‘Alarm :’, ICON_ALARM AS ICON. WRITE: / ‘Green Light :’,
ICON_GREEN_LIGHT AS ICON 2 2 2222 2. FORMAT HOTSPOT ON.
WRITE: / ‘Hello ABAP’, ’Hi!’. FORMAT HOTSPOT OFF.
Symbols and Icons Symbols and Icons
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Pattern
Calling big functions with a lot of importing and exporting parameters may be fault-prone
Procedure: Navigate to the position where the
function should be called Click the ‘Pattern’ button Choose the ABAP instruction Choose parameters
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Pattern
กดปุ่��ม Continue
เลือกคำ �สั่��ง write
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เลือก pattern ที่��ต้�องก�รกด
ปุ่��ม Copy
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Include Program You can create a program with program type include
program in the program attribute Include program do not have to have an introductory
statement During the syntax check and during program generation
by the ABAP compiler, the INCLUDE statement is replaced by the source text of the defined include program
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Include Program (2)
REPORT ztest1.Write :/ ‘test1’.INCLUDE zinclude1.Write :/ ‘test2’.
Ztest1
Write : / ‘test3’.Write : / ‘test4’.Write : / ‘test5’.
Include Program : Zinclude1
Include Program :1. Type => Include Program2. Activate program
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Pretty Printer Pretty Printer formats your source code Settings can be adjusted via Utilities • Settings •
ABAP Editor tab • Pretty Printer tab Pretty Printer supports indent, keyword conversion
upper-/lowercase
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Exercise II