ABAP Select data from SAP table /SCWM/S_SP_A_HEAD_CORE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SCWM/S_SP_A_HEAD_CORE 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 /SCWM/S_SP_A_HEAD_CORE. 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 /SCWM/S_SP_A_HEAD_CORE 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_/SCWM/S_SP_A_HEAD_CORE TYPE STANDARD TABLE OF /SCWM/S_SP_A_HEAD_CORE,
      WA_/SCWM/S_SP_A_HEAD_CORE TYPE /SCWM/S_SP_A_HEAD_CORE,
      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: </SCWM/S_SP_A_HEAD_CORE> TYPE /SCWM/S_SP_A_HEAD_CORE.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/S_SP_A_HEAD_CORE
*  INTO TABLE @DATA(IT_/SCWM/S_SP_A_HEAD_CORE2).
*--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_/SCWM/S_SP_A_HEAD_CORE INDEX 1 INTO DATA(WA_/SCWM/S_SP_A_HEAD_CORE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCWM/S_SP_A_HEAD_CORE>-DOCID = 1.
</SCWM/S_SP_A_HEAD_CORE>-CHANGEABLE_ICON = 1.
</SCWM/S_SP_A_HEAD_CORE>-ERROR_STATUS_ICON = 1.
</SCWM/S_SP_A_HEAD_CORE>-ACTIONCODE = 1.
</SCWM/S_SP_A_HEAD_CORE>-DOCNO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCWM/S_SP_A_HEAD_CORE-DOCTYPE, sy-vline,
  WA_/SCWM/S_SP_A_HEAD_CORE-DOCCAT, sy-vline,
  WA_/SCWM/S_SP_A_HEAD_CORE-TEXTIND, sy-vline,
  WA_/SCWM/S_SP_A_HEAD_CORE-BSKEY, sy-vline,
  WA_/SCWM/S_SP_A_HEAD_CORE-VERSION, sy-vline,
  WA_/SCWM/S_SP_A_HEAD_CORE-MANUAL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/S_SP_A_HEAD_CORE 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_/SCWM/S_SP_A_HEAD_CORE 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_/SCWM/S_SP_A_HEAD_CORE INTO WA_/SCWM/S_SP_A_HEAD_CORE.


*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_/SCWM/S_SP_A_HEAD_CORE_STR, 
DOCID TYPE STRING,
CHANGEABLE_ICON TYPE STRING,
ERROR_STATUS_ICON TYPE STRING,
ACTIONCODE TYPE STRING,
DOCNO TYPE STRING,
DOCTYPE TYPE STRING,
DOCCAT TYPE STRING,
TEXTIND TYPE STRING,
BSKEY TYPE STRING,
VERSION TYPE STRING,
MANUAL TYPE STRING,
CHANGEABLE TYPE STRING,
DOCCAT_TXT TYPE STRING,
DOCTYPE_TXT TYPE STRING,
LGNUM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/S_SP_A_HEAD_CORE_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_/SCWM/S_SP_A_HEAD_CORE_STR-DOCID sy-vline 
WA_/SCWM/S_SP_A_HEAD_CORE_STR-CHANGEABLE_ICON sy-vline 
WA_/SCWM/S_SP_A_HEAD_CORE_STR-ERROR_STATUS_ICON sy-vline 
WA_/SCWM/S_SP_A_HEAD_CORE_STR-ACTIONCODE sy-vline 
WA_/SCWM/S_SP_A_HEAD_CORE_STR-DOCNO sy-vline 
WA_/SCWM/S_SP_A_HEAD_CORE_STR-DOCTYPE sy-vline 
WA_/SCWM/S_SP_A_HEAD_CORE_STR-DOCCAT sy-vline 
WA_/SCWM/S_SP_A_HEAD_CORE_STR-TEXTIND sy-vline 
WA_/SCWM/S_SP_A_HEAD_CORE_STR-BSKEY sy-vline 
WA_/SCWM/S_SP_A_HEAD_CORE_STR-VERSION sy-vline 
WA_/SCWM/S_SP_A_HEAD_CORE_STR-MANUAL sy-vline 
WA_/SCWM/S_SP_A_HEAD_CORE_STR-CHANGEABLE sy-vline 
WA_/SCWM/S_SP_A_HEAD_CORE_STR-DOCCAT_TXT sy-vline 
WA_/SCWM/S_SP_A_HEAD_CORE_STR-DOCTYPE_TXT sy-vline 
WA_/SCWM/S_SP_A_HEAD_CORE_STR-LGNUM sy-vline      INTO ld_text SEPARATED BY SPACE.

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