Modularization & Catch Statement
Upcoming SlideShare
Loading in...5
×
 

Modularization & Catch Statement

on

  • 5,478 views

5th part of series shared on http://sapdocs.info/sap/abap/documents-for-sap-abap-beginners/

5th part of series shared on http://sapdocs.info/sap/abap/documents-for-sap-abap-beginners/

Statistics

Views

Total Views
5,478
Views on SlideShare
4,818
Embed Views
660

Actions

Likes
3
Downloads
672
Comments
0

6 Embeds 660

http://www.erpgenie.com 572
http://erpgenie.com 66
http://www.erpgenie.com.php5-5.dfw1-2.websitetestlink.com 13
http://www.slideshare.net 5
http://erpgenie.com.php5-5.dfw1-2.websitetestlink.com 2
http://translate.googleusercontent.com 2

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

Modularization & Catch Statement Modularization & Catch Statement Presentation Transcript

  • ABAP Chapter 5
    • Modularization
    • Catch Statement
  • Modularization
  • Modularization
    • Internal Subroutine Call
    • External Subroutine Call
    • Function Module
  • Subroutine START-OF-SELECTION. Perfrom routine1. Perform routine2. Perform routine2. Form routine1. select * from customers into table tab. Endform. Form routine2. loop at tab. write: / tab-id,tab-name. endloop. Endform. …
  • Modularization
    • Avoid redundancy
    • Make your program easy to read & improve their structure
    • Re-use Program components
  • Calling and Defining Subroutines REPORT ztest. * Global Data TABLES customers. DATA tmp type i. * Subroutine Calls PERFORM routine1. PERFORM routine2. * Subroutine FORM routine1. DATA tmp1 type p. “Local data write tmp. ENDFORM . FORM routine2. DATA tmp2(10). “Local data … .. ENDFORM .
  • Call by Value a1 Memory Space(Subroutine) f1 Copy
  • Call by Value Data: a1,a2. a1 = ‘A’. a2 = ‘A’. PERFORM routine1 USING a1 a2. .…... FORM routine1 USING VALUE(f1) VALUE(f2). f1 = ‘X’. f2 = ‘X’. ENDFORM.
  • Call by Reference a3 Memory Space(Subroutine) f3 Address Passing
  • Call by Reference Data: a3. a3 = ‘A’. PERFORM routine2 USING a3. .…... FORM routine2 USING f3. f3 = ‘X’. ENDFORM.
  • Call by Value and Result a4 Memory Space(Subroutine) f4 Copy Copy
  • Call by Value and Result Data: a4,a5. a4 = ‘A’. a5 = ‘A’. PERFORM routine3 USING a4 a5. .…... FORM routine 3 CHANGING VALUE(f4) f5. “ f5 : call by reference f4 = ‘X’. f5 = ‘X’. ENDFORM.
  • Passing Structure as Parameters TABLES sflight. SELECT * FROM sflight. PERFORM subproc USING sflight. ENDSELECT. FORM subproc USING rec LIKE sflight. WRITE: / rec-carrid. ENDFORM.
  • Passing Internal Table as Parameters DATA: tab LIKE sflight OCCURS 0 WITH HEADER LINE. … PERFORM sub TABLES tab.
  • Passing Internal Table as Parameters FORM sub TABLES tab1 STRUCTURE tab. LOOP AT tab1. WRITE: / tab1-carrid. ENDLOOP. ENDFORM.
  • External Subroutines REPORT RSAAA10F. TABLES: sflight. … .. PERFORM cal(RSAAA10B). REPORT RSAAA10B. TABLES sflight. … .. FORM cal. … .. ENDFORM.
  • EXIT Statement DATA tmp TYPE I. tmp = 4. PERFORM a. WRITE tmp. FORM a. EXIT. tmp = 99. ENDFORM.
  • STOP Statement DATA tmp TYPE I. START-OF-SELECTION. tmp = 4. PERFORM a. WRITE tmp. END-OF-SELECTION. tmp = 0. write tmp. FORM a. STOP. “go to END-OF-SELECTION tmp = 99. ENDFORM.
  • Function Module
  • Function Module
    • Function Group
    • Function Library
    • - Admin
    • - Import/Export Parameter
    • - Source Code
    • - Main Program
    • - Documentation
  • Function Group
    • When you create a function module, you must assign it to function group
    • The function group is the main program in which a function module is embedded
    • The function group is a program type F,and not executable
    • The entire function group is loaded in a program the first time that you call a function module that belongs to it
  • Function Group
    • is a container for function modules
    • When a function module is called,the entire function group is loaded into the session of the program
    • Function group is used to define global data for function modules
    • A DATA statement in the global memory of a function group is shared by all the function modules that belong to that function group
  • Function Group : SE37
  • Function Group : SE80
  • Function Module
    • is a code that can be called from any ABAP program,therefore making it a globally accessible object
    • ABAP program pass data to function module from import parameters or internal tables
    • Function module receives data from a program,process the information in its own code, and then sends back information in the export parameters or internal tables
  • Function Module : SE37
  • Function Module
  • Function Module : Source Code FUNCTION Z_FMTEST. result = number1 ** number2. ENDFUNCTION.
  • Program Example I REPORT ztest. PARAMETERS: no1 TYPE I , no2 TYPE I. DATA result TYPE I . START-OF-SELECTION. CALL FUNCTION ‘Z_ FMTEST ’ EXPORTING number1 = no1 number2 = no2 IMPORTING result = result. write: / result.
  • Exercise : Function Module ? ABAP Program Function Module
  • EXCEPTIONS
  • Function Module Function Z_CAL01. if number1 > 9 and number2 > 9. raise invalidnumber. else. result = number1 ** number2. endif. ENDFUNCTION.
  • Example II : Exceptions REPORT ztest. PARAMETERS: no1 TYPE I , no2 TYPE I. DATA result TYPE I . START-OF-SELECTION. CALL FUNCTION ‘Z_ CAL01 ’ EXPORTING number1 = no1 number2 = no2 IMPORTING result = result EXCEPTIONS invalidnumber = 1. IF sy-subrc <> 0. write: / ‘Please enter number < 10’. ELSE. write: / result. ENDIF.
  • Exercise : Exceptions ? ABAP Program Function Module
  • EXCEPTIONS VS AT SELECTION-SCREEN FUNCTION Z_CAL01. if number1 > 9 and number2 > 9. raise invalidnumber. else. result = number1 ** number2. endif. ENDFUNCTION. REPORT ztest. Parameters: no1 type i, no2 type i. At selection-screen if no1 > 9 and no2 > 9. message e000(38) with ‘Please enter no < 10’. endif. START-OF-SELECTION. CALL FUNCTION ‘Z_CAL01’. … .. VS
  • Optional ABAP Program Function Module
  • Structure in Function Module
  • Example : Structure
  • Example : Structure
  • Internal Table in Function Module
  • Example : Internal Table
  • Example : Internal Table
  • Function Group Function Group : ZGRP00 Function Module : Z_FMTEST Function Module : Z_CAL01
  • Function Group
  • Function Module in Function Group
  • Exercise
    • Display current month name using function module
  • Catch Statement
  • CATCH Statement
    • Syntax
    • Catch system-exceptions < error type > = < n > .
    • < ABAP statement – generate runtime error > .
    • Endcatch.
    • if sy-subrc = < n >.
    • ...
    • endif.
  • CATCH Error Type
    • Error class
      • Catch system-exceptions conversion_errors = 1.
    • Single error
      • Catch system-exceptions convt_no_number = 1.
    • All catchable runtime error
      • Catch system-exceptions others = 1.
  • CATCH Statement Report ztest. Data num type I. Catch system-exceptions conversion_errors = 1. ”others Move ‘abc’ to num. “runtime error: convt_no_number Endcatch. If sy-subrc = 1. Write: / ‘Assign wrong data type to variable: num’. Endif.
  • CATCH Statement Report ztest. Data num type I. Catch system-exceptions other s = 1. Move ‘abc’ to num. Endcatch. If sy-subrc = 1. Write: / ‘Assign wrong data type to variable: num’. Endif.
  • CATCH Statement Report ztest. PARAMETERS: NUM1 TYPE I, NUM2 TYPE I. DATA RESULT TYPE I. START-OF-SELECTION. CATCH SYSTEM-EXCEPTIONS COMPUTE_INT_ZERODIVIDE = 1. RESULT = NUM1 / NUM2. ENDCATCH. IF SY-SUBRC = 1. WRITE: /'Divide by zero'. ELSE. WRITE: / RESULT. ENDIF.
  • CATCH Statement Report ztest. PARAMETERS: NUM1 TYPE I, NUM2 TYPE I. DATA RESULT TYPE I. START-OF-SELECTION. CATCH SYSTEM-EXCEPTIONS OTHERS = 1. RESULT = NUM1 / NUM2. ENDCATCH. IF SY-SUBRC = 1. WRITE: /'Divide by zero'. ELSE. WRITE: / RESULT. ENDIF.
  • CATCH in Function Module Function Z_CAL. if number1 > 9 and number2 > 9. raise invalidnumber. else. result = number1 ** number2. endif. ENDFUNCTION. Function Z_CAL. CATCH SYSTEM-EXCEPTIONS OTHERS = 1. RESULT = NUMBER1 ** NUMBER2. ENDCATCH. IF SY-SUBRC = 1. RAISE invalidnumber. ENDIF. ENDFUNCTION.
  • ABAP Practice