ABAP Select data from SAP table IFMRKGED_HEADER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IFMRKGED_HEADER
*  INTO TABLE @DATA(IT_IFMRKGED_HEADER2).
*--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_IFMRKGED_HEADER INDEX 1 INTO DATA(WA_IFMRKGED_HEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IFMRKGED_HEADER>-COL_BEZ = 1.
<IFMRKGED_HEADER>-COL_01 = 1.
<IFMRKGED_HEADER>-COL_02 = 1.
<IFMRKGED_HEADER>-COL_03 = 1.
<IFMRKGED_HEADER>-COL_04 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IFMRKGED_HEADER-COL_05, sy-vline,
  WA_IFMRKGED_HEADER-COL_06, sy-vline,
  WA_IFMRKGED_HEADER-COL_07, sy-vline,
  WA_IFMRKGED_HEADER-COL_08, sy-vline,
  WA_IFMRKGED_HEADER-COL_09, sy-vline,
  WA_IFMRKGED_HEADER-COL_10, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IFMRKGED_HEADER 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_IFMRKGED_HEADER 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_IFMRKGED_HEADER INTO WA_IFMRKGED_HEADER.


*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_IFMRKGED_HEADER_STR, 
COL_BEZ TYPE STRING,
COL_01 TYPE STRING,
COL_02 TYPE STRING,
COL_03 TYPE STRING,
COL_04 TYPE STRING,
COL_05 TYPE STRING,
COL_06 TYPE STRING,
COL_07 TYPE STRING,
COL_08 TYPE STRING,
COL_09 TYPE STRING,
COL_10 TYPE STRING,
COL_11 TYPE STRING,
COL_12 TYPE STRING,
LINE_CNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IFMRKGED_HEADER_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_IFMRKGED_HEADER_STR-COL_BEZ sy-vline 
WA_IFMRKGED_HEADER_STR-COL_01 sy-vline 
WA_IFMRKGED_HEADER_STR-COL_02 sy-vline 
WA_IFMRKGED_HEADER_STR-COL_03 sy-vline 
WA_IFMRKGED_HEADER_STR-COL_04 sy-vline 
WA_IFMRKGED_HEADER_STR-COL_05 sy-vline 
WA_IFMRKGED_HEADER_STR-COL_06 sy-vline 
WA_IFMRKGED_HEADER_STR-COL_07 sy-vline 
WA_IFMRKGED_HEADER_STR-COL_08 sy-vline 
WA_IFMRKGED_HEADER_STR-COL_09 sy-vline 
WA_IFMRKGED_HEADER_STR-COL_10 sy-vline 
WA_IFMRKGED_HEADER_STR-COL_11 sy-vline 
WA_IFMRKGED_HEADER_STR-COL_12 sy-vline 
WA_IFMRKGED_HEADER_STR-LINE_CNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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