ABAP Select data from SAP table SCOMPISIGN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SCOMPISIGN
*  INTO TABLE @DATA(IT_SCOMPISIGN2).
*--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_SCOMPISIGN INDEX 1 INTO DATA(WA_SCOMPISIGN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SCOMPISIGN>-DESCRIPT = 1.
<SCOMPISIGN>-PACK_NAME = 1.
<SCOMPISIGN>-AUTHOR = 1.
<SCOMPISIGN>-PINFTYPE = 1.
<SCOMPISIGN>-RESTRICTED = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SCOMPISIGN-DEFAULT_IF, sy-vline,
  WA_SCOMPISIGN-DEF_SEVER, sy-vline,
  WA_SCOMPISIGN-ACL_FLAG, sy-vline,
  WA_SCOMPISIGN-PIFSTABLTY, sy-vline,
  WA_SCOMPISIGN-SUPPRESS_TRANSL, sy-vline,
  WA_SCOMPISIGN-RELEASE_STATUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SCOMPISIGN 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_SCOMPISIGN 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_SCOMPISIGN INTO WA_SCOMPISIGN.


*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_SCOMPISIGN_STR, 
DESCRIPT TYPE STRING,
PACK_NAME TYPE STRING,
AUTHOR TYPE STRING,
PINFTYPE TYPE STRING,
RESTRICTED TYPE STRING,
DEFAULT_IF TYPE STRING,
DEF_SEVER TYPE STRING,
ACL_FLAG TYPE STRING,
PIFSTABLTY TYPE STRING,
SUPPRESS_TRANSL TYPE STRING,
RELEASE_STATUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SCOMPISIGN_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_SCOMPISIGN_STR-DESCRIPT sy-vline 
WA_SCOMPISIGN_STR-PACK_NAME sy-vline 
WA_SCOMPISIGN_STR-AUTHOR sy-vline 
WA_SCOMPISIGN_STR-PINFTYPE sy-vline 
WA_SCOMPISIGN_STR-RESTRICTED sy-vline 
WA_SCOMPISIGN_STR-DEFAULT_IF sy-vline 
WA_SCOMPISIGN_STR-DEF_SEVER sy-vline 
WA_SCOMPISIGN_STR-ACL_FLAG sy-vline 
WA_SCOMPISIGN_STR-PIFSTABLTY sy-vline 
WA_SCOMPISIGN_STR-SUPPRESS_TRANSL sy-vline 
WA_SCOMPISIGN_STR-RELEASE_STATUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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