ABAP Select data from SAP table /INCMD/GROUP_HDR_DATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /INCMD/GROUP_HDR_DATA
*  INTO TABLE @DATA(IT_/INCMD/GROUP_HDR_DATA2).
*--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_/INCMD/GROUP_HDR_DATA INDEX 1 INTO DATA(WA_/INCMD/GROUP_HDR_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</INCMD/GROUP_HDR_DATA>-ICNO = 1.
</INCMD/GROUP_HDR_DATA>-ICSUBNO = 1.
</INCMD/GROUP_HDR_DATA>-ICTYPE = 1.
</INCMD/GROUP_HDR_DATA>-SPRAS = 1.
</INCMD/GROUP_HDR_DATA>-ICDESC = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/INCMD/GROUP_HDR_DATA-TIMSTMP, sy-vline,
  WA_/INCMD/GROUP_HDR_DATA-LOGSYS, sy-vline,
  WA_/INCMD/GROUP_HDR_DATA-MPNCH, sy-vline,
  WA_/INCMD/GROUP_HDR_DATA-RESFFF, sy-vline,
  WA_/INCMD/GROUP_HDR_DATA-RELVN, sy-vline,
  WA_/INCMD/GROUP_HDR_DATA-ISTAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/INCMD/GROUP_HDR_DATA 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_/INCMD/GROUP_HDR_DATA 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_/INCMD/GROUP_HDR_DATA INTO WA_/INCMD/GROUP_HDR_DATA.


*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.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_/INCMD/GROUP_HDR_DATA-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/INCMD/GROUP_HDR_DATA-SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/INCMD/GROUP_HDR_DATA-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/INCMD/GROUP_HDR_DATA-LOGSYS.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

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

TYPES: BEGIN OF T_/INCMD/GROUP_HDR_DATA_STR, 
ICNO TYPE STRING,
ICSUBNO TYPE STRING,
ICTYPE TYPE STRING,
SPRAS TYPE STRING,
ICDESC TYPE STRING,
TIMSTMP TYPE STRING,
LOGSYS TYPE STRING,
MPNCH TYPE STRING,
RESFFF TYPE STRING,
RELVN TYPE STRING,
ISTAT TYPE STRING,
ALTRELVN TYPE STRING,
DTUSAGE TYPE STRING,
CHGALWD TYPE STRING,
LOCID TYPE STRING,
LEADPROD TYPE STRING,
BLKIND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/INCMD/GROUP_HDR_DATA_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_/INCMD/GROUP_HDR_DATA_STR-ICNO sy-vline 
WA_/INCMD/GROUP_HDR_DATA_STR-ICSUBNO sy-vline 
WA_/INCMD/GROUP_HDR_DATA_STR-ICTYPE sy-vline 
WA_/INCMD/GROUP_HDR_DATA_STR-SPRAS sy-vline 
WA_/INCMD/GROUP_HDR_DATA_STR-ICDESC sy-vline 
WA_/INCMD/GROUP_HDR_DATA_STR-TIMSTMP sy-vline 
WA_/INCMD/GROUP_HDR_DATA_STR-LOGSYS sy-vline 
WA_/INCMD/GROUP_HDR_DATA_STR-MPNCH sy-vline 
WA_/INCMD/GROUP_HDR_DATA_STR-RESFFF sy-vline 
WA_/INCMD/GROUP_HDR_DATA_STR-RELVN sy-vline 
WA_/INCMD/GROUP_HDR_DATA_STR-ISTAT sy-vline 
WA_/INCMD/GROUP_HDR_DATA_STR-ALTRELVN sy-vline 
WA_/INCMD/GROUP_HDR_DATA_STR-DTUSAGE sy-vline 
WA_/INCMD/GROUP_HDR_DATA_STR-CHGALWD sy-vline 
WA_/INCMD/GROUP_HDR_DATA_STR-LOCID sy-vline 
WA_/INCMD/GROUP_HDR_DATA_STR-LEADPROD sy-vline 
WA_/INCMD/GROUP_HDR_DATA_STR-BLKIND sy-vline      INTO ld_text SEPARATED BY SPACE.

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