08-abapdialogprogrammingoverview-090715081222-phpapp02

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Dialog Programming Overview



SAP Syst em : Dialog Processing (Report)

Database Server

Application Server

Dispat cher

RequestQueue

D D D D«

SAP Buffer

Program

«

«

1

3

4

5

68

9

10

Report zpsm1.

Tables cust omers.

Select single * from

cust omers where id = 1.

Writ e: / cust omers-name.

ExecuteABAPstatement

Check Program inProgram Buffer

7

Load&GenProgram

SQL Request

SendList

GenerateScreen(List)

Send Request

Request

List

2 Search for free WP

Store requestto queue

Send requestto WP

SAP

GUI



Dialog WP : Executable ProgramDialog WP : Executable ProgramDialog WP

TaskHandler

DYNPRO Processor

ABAP Processor

Database

Local Memory

Memory

Space

DB Interface

List Buffer

Result Set Memory



Types of ABAP Report

1. Report Listing

2. Drill-down Report

3. Control-break Report

4. ALV Report

1

3

4



SAP Syst em : Dialog Processing (DI ALOG)

Database Server

Application Server

Dispat cher

RequestQueue

D D D D«

SAP Buffer

Program

«

«

1

3

4

5

68

9

10

Program sapmzex001.

Include «.

Set screen 100.

«

ExecuteABAPstatement

Check Program inProgram Buffer

7

Load&GenProgram

SQL Request

SendList

Generate DialogScreen

Send Request

Request Sc

reen

2 Search for free WP

Store requestto queue

Send requestto WP

SAPGUI



Dialog WP : Dialog ProgramDialog WP : Dialog ProgramDialog WP

TaskHandler

DYNPRO Processor

ABAP Processor

Database

Local Memory

ABAP Memory

DB Interface

ScreenBuffer

Result Set Memory



Dialog Program : Transact ion



Dialog Program ComponentsTransaction Code

Screen : 100100(Screen Layout)

Screen : 200200(Screen Layout)

Flow Logic

Flow Logic

PBO

PAI

ABAP Module Pool

ABAP Module Pool

PBO

PAI

ABAP Module Pool

ABAP Module Pool

Dialog Program Program Naming Convention : SAPM«



SAP Transact ion

An SAP t ransact ion consists of Dialog st eps. A Dialog st epbegins when t he user press Ent er,act ivat es a funct ion by pressing a funct ion key,double-clicks or chooses a funct ion froma menu.It ends when t he next screen is display

In t he course of a Dialog st ep,The P AI modules belonging t o t hecurrent screen and t he PBO modules belonging t o t he next screen

DB Commit DB Commit



Dat a Transfer (Local Memory)

Screen Buffer ABAP Memory Space

Screen Work Area ABAP Work Area

PBOPBO

PAIPAI

customers-id

customers-name

customers

id name city «

0000000

ok_code

ok_code

Local Memory

Element List



Flow Logic Process Before Out put (PBO)

After it has processed all of t he modules in t he

PBO processing block, t he syst em copies t hecont ents of t he fields in t he ABAP work area t ot heir corresponding fields in t he screen work area.

Process Af t er Input (P AI) Before it processes t he first module in t he PAI

processing block, t he syst em copies t he cont ents of t he fields in t he screen work area t o t heircorresponding fields in t he ABAP work area.



OK Code Field in Screen

OK CodeField orCommand Field

(ok_code in Element List)



Defining Screen (4 St eps) Screen Att ribut e

Screen Layout

Flow Logic

Element List

ElementList(ok_code

field)



Flow Logic in Screen 100PROCESS BEFORE OUTPUT.

MODULE ST ATUS _0100.

PROCESS AFTER INPUT.

MODULE USER_COMM AND_0100.



PBO in Screen 100

MODULE st at us _0100 OUTPUT.

SET PF-ST ATUS µ0100¶.SET TITLEBAR µ0100¶.

ENDMODULE.



P AI in Screen 100MODULE user_command_0100 INPUT.

C ASE ok_code.

WHENµ

EXIT¶

.L

eaveprogramSET SCREEN 0. LE AVE SCREEN. Leave to

screen 0WHEN µSAVE¶.

UPD ATE cust omers.MESSAGE S000(38) WITH µUpdat e OK ¶.

SET SCREEN 50. LE AVE SCREEN.ENDC ASE.

ENDMODULE.



How t o Creat e Dialog Program Transact ion SE80 : Creat e Dialog Program

Creat e Screen(4 st eps)

Screen Att ribut e Screen Layout

Flow Logic(PBO,P AI)

Define Variable ok_code in Element List

Define Dat a Object in ABAP Work Area at TOP Include(Tables, Dat a,...)

Check and Act ivat e Dialog Program

Creat e Transact ion Code



Example I

Maint ain Cust omers Dat aScreen : 100 Screen : 200



Example I

Creat e Dialog Program SAPMZEX <nn> forchanging Cust omers t able

Screen 100

Field cust omers-id

Screen 200

Field cust omers-id and cust omers-name



Example I

Screen 100

PROCESS BEFORE OUTPUT.


PROCESS AFTER INPUT.MODULE USER_COMM AND_0100.



Example I

Screen 100


SET PF-ST ATUS µ0100¶.

SET TITLEBAR µ0100¶.

ENDMODULE.



Example I

Screen 100

MODULE user_command_0100 INPUT.C ASE ok_code.

WHEN µBACK ¶.

LE AVE PROGR AM. ³leave t o screen 0

WHEN space. ³if not assign Ent er Key

SELECT SINGLE * FROM cust omers

WHERE id = cust omers-id.

LE AVE TO SCREEN 200.

ENDC ASE.

ENDMODULE.



Example I

Screen 200







Example I

Screen 200




ENDMODULE.



Example I Screen 200

MODULE user_command_0200 INPUT.C ASE ok_code.

WHEN µBACK ¶.

LE AVE TO SCREEN 100. ³set screen 100

WHEN µSAVE¶.

UPD ATE cust omers.MESSAGE S000(38) WITH µUpdat e OK!¶.


ENDC ASE.

ENDMODULE.



Example I

TOP Include

T ABLES cust omers.D AT A ok_code TYPE sy-ucomm.

Create Transaction CodeTransact ion Code : ZEX<nn>



Exercise

Creat e Dialog Program : SAPMZCUST<nn>

Transact ion Code : ZCUST<nn>



Exercise : Cust omers Maint enance

Screen : 100 Screen : 200



Sett ing t he Cursor Posit ion Dynamically

Cursor Position

PROCESS BEFORE OUTPUT.MODULE ST ATUS _0200.

MODULE set _cursor.

MODULE set _cursor OUTPUT.

SET CURSOR FIELD µCUSTOMERS-CITY ¶OFFSET 3.

ENDMODULE.



Avoiding t he Unexpect ed

Processing St ep of ok_codeField



1. Auxiliary OK_CODE Variable

TOP Include

T ABLES cust omers.D AT A ok_code TYPE sy-ucomm.

D AT A save_ok TYPE sy-ucomm.



Example I - Change

Screen 100 : PAIMODULE user_command_0100 INPUT.

save_ok = ok_code.

CLE AR ok_code.

C ASE save_ok.

WHEN µBACK ¶.

LE AVE PROGR AM.WHEN space.

SELECT SINGLE * FROM cust omers WHERE id = cust omers-id.


ENDC ASE.

ENDMODULE.



Example I - Change Screen 200 : PAI

MODULE user_command_0200 INPUT.

save_ok = ok_code.

CLE AR ok_code.

C ASE save_ok.

WHEN µBACK ¶.


WHEN space.

LE AVE TO SCREEN 200.WHEN µSAVE¶.

UPD ATE cust omers.

MESSAGE s000(38) WITH µUpdat e OK!¶.


ENDC ASE.

ENDMODULE.



2. Specif y t he Enter Funct ion at GUI St at us



Check Ent er Funct ion


C ASE ok_code.

WHEN µBACK ¶.

LE AVE PROGR AM.

WHEN µENTE¶.

SELECT SINGLE * FROM cust omers

WHERE id = cust omers-id.


ENDC ASE.

ENDMODULE.



3. Clear OK_CODE at PBO

Screen 100 : Flow Logic



MODULE clear_ok_code.





Clear OK_CODE at PBO

Screen 100 : PBOMODULE st at us _0100 OUTPUT.



ENDMODULE.

MODULE clear_ok_code OUTPUT.CLE AR ok_code.

ENDMODULE.



Checking User Input



Example IIMaint ain Cust omers Dat a

Check Input Dat a ManuallyCheck Input Dat a Manually



Example II Screen 100 : PAI


...WHEN SP ACE.


IF sy-subrc <> 0.

MESSAGE S000(38) WITH µCust omers dat a not found¶.

LE AVE TO SCREEN 100.ELSE.


ENDIF.

ENDC ASE.

ENDMODULE.



Example III

Maint ain Cust omers Dat a

Check Input Dat a UsingCheck Input Dat a Using FieldField CommandCommand



Example III ± Field St at ement

Screen 100 : Flow Logic (PAI)


FIELD cust omers-id MODULE user_command_0100.



Example III


...

WHEN SP ACE.


IF sy-subrc <> 0.

MESSAGE E000(38) WITH µCust omers dat a not found¶.

ELSE.


ENDIF.

ENDC ASE.

ENDMODULE.



Field Input Checking If you want t o check input values in t he module

pool and st art dialog in t he event of a negat ive

result ,you use t heFIELD st at ement wit h t headdit ion MODULE.

If t he module results in an error(E) orwarning(W) message,t he screen is redisplayedwit hout processing t he PBO modules.Themessage t ext is displayed and only t he fieldbeing checked by t his module becomes ready forinput again



Field St at ement Wit h More Than 1 Field

Screen 100 : Flow Logic (PAI)PROCESS AFTER INPUT.

CH AIN.FIELD: cust omers-id,cust omers-custtype

MODULE user_command_0100.

ENDCH AIN.

PROCESS AFTER INPUT.CH AIN.FIELD cust omers-id MODULE user_command_0100.FIELD cust omers-custtype MODULE user_command_0100.ENDCH AIN.



Field St at ement & Dat a Transport


MODULE a.

FILED f1 MODULE b.

FILED f2 MODULE c.

MODULE d.

f1 f2

f3 f4

Screen 100

Transfer f3,f4

Call module aTransfer f1Call module bTransfer f2

Call module cCall module d



RequiredField



Required Field



At exit-command



Funct ion Type : Exit Command



When user chooses a funct ion wit h type

E,t he screen flow logic jumps direct ly t o t he

following st at ement MODULE <module> AT EXITMODULE <module> AT EXIT--COMM ANDCOMM AND

No ot her screen fields are t ransport ed t o t heprogram except OK Code field

At exit-command



At exit-command Screen 100 : Flow Logic




MODULE exit AT EXIT-COMM AND.




At exit-command Screen 100 : PAI

MODULE exit INPUT.

C ASE ok_code.

WHEN µEXIT¶.

LE AVE PROGR AM.ENDC ASE.

ENDMODULE.

LE AVE PROGR AM.



Funct ion Module(POPUP_TO_CONFIRM_LOSS _OF _D AT A)



Example I V

Maint ain Cust omer Dat a

Popup confirmat ion dat a using funct ionPopup confirmat ion dat a using funct ion

µ µ POPUP_TO_CONFIRM_LOSS_OF_DAT A¶



Example I V TOP Include

...

D AT A ans.



Example I V Screen 100 : PAI

MODULE exit INPUT.C ALL FUNCTION µPOPUP_TO_CONFIRM_LOSS_OF_DAT A¶

EXPORTINGt ext line1 = µ Are you sure?¶t it el = µPlease Confirm!!!¶

IMPORTINGanswer = ans.

IF ans = µJ¶. ³ J = Ja in German= Yes in EnglishLE AVE PROGR AM.

ELSE.ENDIF.

ENDMODULE.



SAP Transact ion : Enqueue Lock Object



SAP Transact ion & DB Transact ion Each Dialog st ep can cont ain updat e

requests(INSERT,DELETE,UPD ATE)

Af t er each Dialog st ep,t he R/3 syst emaut omat ically passes a dat abase commit t o t hedat abase syst em.The dat abase syst em t hendist ribut es t he updat e requests from t heindividual dialog st eps across several dat abaset ransact ions

A rollback in one Dialog st ep has no effect ondat abase updat es performed in previous Dialogst eps



SAP Transact ion(LUW)DB Commit DB Commit

SAP LUW

DB LUW



SAP Dat abase Maint enance St eps Check dat a locking by calling funct ionµENQUEUE_<lock object lock object >¶

Read dat a from Dat abase Ex. Select single «

Dat a Processing Ex. Updat e ...

Release lock by calling funct ionµDEQUEUE_<lock object lock object >¶



SAP Lock Object Transact ion SE11 : Lock object

ENQUEUE_<lock object lock object >

DEQUEUE_<lock object lock object >



SAP Lock Object :Funct ion Module



Example I V ENQUEUE /DEQUEUELock Object(SE11)

C ALL FUNCTION µENQUEUE_EZCUST<nn>¶

C ALL FUNCTION µDEQUEUE_EZCUST<nn>¶

User 1 User 2



Example I V (I) Screen 100 : PAI


...

WHEN SP ACE.C ALL FUNCTION µENQUEUE_EZCUST00¶

EXPORTING

«

id = cust omers-id

EXCEPTIONS

...IF sy-subrc <> 0.

MESSAGE ID S Y -MSGID TYPE S Y -MSGTY NUMBER S Y -MSGNO

WITH S Y -MSG V1 S Y -MSG V2 S Y -MSG V3 S Y -MSG V4.

ELSE.


...



Example I V (II) Screen 100 : PAI


...WHEN SP ACE.

C ALL FUNCTION µENQUEUE_EZCUST00¶

EXPORTING

id = cust omers-id

...

IF sy-subrc <> 0.CONC ATEN ATE µDat a was locked by :¶ sy-msgv1 INTO mess.

MESSAGE E000(38) WITH mess.

ELSE.


...

message id sy-msgidtype sy-msgty number

sy-msgno with

sy-msgv1 sy-msgv2sy-msgv3 sy-

msgv4.





...WHEN BACK.C ALL FUNCTION DEQUEUE_EZCUST00

EXPORTINGid = cust omers-id.






...WHEN µSAVE¶.

UPD ATE cust omers.

MESSAGE S000(38) WITH µUpdat e OK!¶.

C ALL FUNCTION µDEQUEUE_EZCUST00¶

EXPORTING

«id = cust omers-id.


...

...



Monit oring Enqueue Lock : SM12

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