ABAP Select data from SAP table /SDF/AGGEXTSYSTEM into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SDF/AGGEXTSYSTEM table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to /SDF/AGGEXTSYSTEM. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the /SDF/AGGEXTSYSTEM table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_/SDF/AGGEXTSYSTEM TYPE STANDARD TABLE OF /SDF/AGGEXTSYSTEM,
      WA_/SDF/AGGEXTSYSTEM TYPE /SDF/AGGEXTSYSTEM,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: </SDF/AGGEXTSYSTEM> TYPE /SDF/AGGEXTSYSTEM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/SDF/AGGEXTSYSTEM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SDF/AGGEXTSYSTEM
  INTO TABLE IT_/SDF/AGGEXTSYSTEM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SDF/AGGEXTSYSTEM
*  INTO TABLE @DATA(IT_/SDF/AGGEXTSYSTEM2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_/SDF/AGGEXTSYSTEM INDEX 1 INTO DATA(WA_/SDF/AGGEXTSYSTEM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SDF/AGGEXTSYSTEM ASSIGNING </SDF/AGGEXTSYSTEM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SDF/AGGEXTSYSTEM>-I_SYSTEMID = 1.
</SDF/AGGEXTSYSTEM>-I_SERVTYP = 1.
</SDF/AGGEXTSYSTEM>-I_USERID = 1.
</SDF/AGGEXTSYSTEM>-I_ACTION = 1.
</SDF/AGGEXTSYSTEM>-I_ACTTYPE = 1.

ENDLOOP.

LOOP AT IT_/SDF/AGGEXTSYSTEM INTO WA_/SDF/AGGEXTSYSTEM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SDF/AGGEXTSYSTEM-TASKTYPE, sy-vline,
  WA_/SDF/AGGEXTSYSTEM-COUNT, sy-vline,
  WA_/SDF/AGGEXTSYSTEM-DCOUNT, sy-vline,
  WA_/SDF/AGGEXTSYSTEM-UCOUNT, sy-vline,
  WA_/SDF/AGGEXTSYSTEM-BCOUNT, sy-vline,
  WA_/SDF/AGGEXTSYSTEM-ECOUNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SDF/AGGEXTSYSTEM you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_/SDF/AGGEXTSYSTEM TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_/SDF/AGGEXTSYSTEM INTO WA_/SDF/AGGEXTSYSTEM.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_/SDF/AGGEXTSYSTEM_STR, 
I_SYSTEMID TYPE STRING,
I_SERVTYP TYPE STRING,
I_USERID TYPE STRING,
I_ACTION TYPE STRING,
I_ACTTYPE TYPE STRING,
TASKTYPE TYPE STRING,
COUNT TYPE STRING,
DCOUNT TYPE STRING,
UCOUNT TYPE STRING,
BCOUNT TYPE STRING,
ECOUNT TYPE STRING,
SCOUNT TYPE STRING,
RESPTI TYPE STRING,
PROCTI TYPE STRING,
CPUTI TYPE STRING,
QUEUETI TYPE STRING,
ROLLWAITTI TYPE STRING,
GUITIME TYPE STRING,
GUICNT TYPE STRING,
GUINETTIME TYPE STRING,
DBP_COUNT TYPE STRING,
DBP_TIME TYPE STRING,
READDIRCNT TYPE STRING,
READDIRTI TYPE STRING,
READDIRBUF TYPE STRING,
READDIRREC TYPE STRING,
READSEQCNT TYPE STRING,
READSEQTI TYPE STRING,
READSEQBUF TYPE STRING,
READSEQREC TYPE STRING,
CHNGCNT TYPE STRING,
CHNGTI TYPE STRING,
CHNGREC TYPE STRING,
PHYREADCNT TYPE STRING,
PHYCHNGREC TYPE STRING,
PHYCALLS TYPE STRING,
DSQLCNT TYPE STRING,
QUECNT TYPE STRING,
CPICCNT TYPE STRING,
SLI_CNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SDF/AGGEXTSYSTEM_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_/SDF/AGGEXTSYSTEM_STR-I_SYSTEMID sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-I_SERVTYP sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-I_USERID sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-I_ACTION sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-I_ACTTYPE sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-TASKTYPE sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-COUNT sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-DCOUNT sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-UCOUNT sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-BCOUNT sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-ECOUNT sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-SCOUNT sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-RESPTI sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-PROCTI sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-CPUTI sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-QUEUETI sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-ROLLWAITTI sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-GUITIME sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-GUICNT sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-GUINETTIME sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-DBP_COUNT sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-DBP_TIME sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-READDIRCNT sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-READDIRTI sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-READDIRBUF sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-READDIRREC sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-READSEQCNT sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-READSEQTI sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-READSEQBUF sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-READSEQREC sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-CHNGCNT sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-CHNGTI sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-CHNGREC sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-PHYREADCNT sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-PHYCHNGREC sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-PHYCALLS sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-DSQLCNT sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-QUECNT sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-CPICCNT sy-vline 
WA_/SDF/AGGEXTSYSTEM_STR-SLI_CNT sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.