ABAP Select data from SAP table SCOMPKSIGN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP SCOMPKSIGN 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 SCOMPKSIGN. 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 SCOMPKSIGN 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_SCOMPKSIGN TYPE STANDARD TABLE OF SCOMPKSIGN,
      WA_SCOMPKSIGN TYPE SCOMPKSIGN,
      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: <SCOMPKSIGN> TYPE SCOMPKSIGN.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM SCOMPKSIGN
  INTO TABLE IT_SCOMPKSIGN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SCOMPKSIGN
*  INTO TABLE @DATA(IT_SCOMPKSIGN2).
*--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_SCOMPKSIGN INDEX 1 INTO DATA(WA_SCOMPKSIGN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_SCOMPKSIGN ASSIGNING <SCOMPKSIGN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SCOMPKSIGN>-CTEXT = 1.
<SCOMPKSIGN>-KORRFLAG = 1.
<SCOMPKSIGN>-AS4USER = 1.
<SCOMPKSIGN>-PDEVCLASS = 1.
<SCOMPKSIGN>-DLVUNIT = 1.

ENDLOOP.

LOOP AT IT_SCOMPKSIGN INTO WA_SCOMPKSIGN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SCOMPKSIGN-COMP_POSID, sy-vline,
  WA_SCOMPKSIGN-COMPONENT, sy-vline,
  WA_SCOMPKSIGN-PARENTCL, sy-vline,
  WA_SCOMPKSIGN-PERMINHER, sy-vline,
  WA_SCOMPKSIGN-INTFPREFX, sy-vline,
  WA_SCOMPKSIGN-PACKTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SCOMPKSIGN 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_SCOMPKSIGN 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_SCOMPKSIGN INTO WA_SCOMPKSIGN.


*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_SCOMPKSIGN_STR, 
CTEXT TYPE STRING,
KORRFLAG TYPE STRING,
AS4USER TYPE STRING,
PDEVCLASS TYPE STRING,
DLVUNIT TYPE STRING,
COMP_POSID TYPE STRING,
COMPONENT TYPE STRING,
PARENTCL TYPE STRING,
PERMINHER TYPE STRING,
INTFPREFX TYPE STRING,
PACKTYPE TYPE STRING,
PACKKIND TYPE STRING,
RESTRICTED TYPE STRING,
MAINPACK TYPE STRING,
SRV_CHECK TYPE STRING,
CLI_CHECK TYPE STRING,
EXT_ALIAS TYPE STRING,
PROJECT_GUID TYPE STRING,
PROJECT_ID TYPE STRING,
PROJECT_PASSDOWN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SCOMPKSIGN_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_SCOMPKSIGN_STR-CTEXT sy-vline 
WA_SCOMPKSIGN_STR-KORRFLAG sy-vline 
WA_SCOMPKSIGN_STR-AS4USER sy-vline 
WA_SCOMPKSIGN_STR-PDEVCLASS sy-vline 
WA_SCOMPKSIGN_STR-DLVUNIT sy-vline 
WA_SCOMPKSIGN_STR-COMP_POSID sy-vline 
WA_SCOMPKSIGN_STR-COMPONENT sy-vline 
WA_SCOMPKSIGN_STR-PARENTCL sy-vline 
WA_SCOMPKSIGN_STR-PERMINHER sy-vline 
WA_SCOMPKSIGN_STR-INTFPREFX sy-vline 
WA_SCOMPKSIGN_STR-PACKTYPE sy-vline 
WA_SCOMPKSIGN_STR-PACKKIND sy-vline 
WA_SCOMPKSIGN_STR-RESTRICTED sy-vline 
WA_SCOMPKSIGN_STR-MAINPACK sy-vline 
WA_SCOMPKSIGN_STR-SRV_CHECK sy-vline 
WA_SCOMPKSIGN_STR-CLI_CHECK sy-vline 
WA_SCOMPKSIGN_STR-EXT_ALIAS sy-vline 
WA_SCOMPKSIGN_STR-PROJECT_GUID sy-vline 
WA_SCOMPKSIGN_STR-PROJECT_ID sy-vline 
WA_SCOMPKSIGN_STR-PROJECT_PASSDOWN sy-vline      INTO ld_text SEPARATED BY SPACE.

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