ABAP Select data from SAP table IFMRKFGH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IFMRKFGH
*  INTO TABLE @DATA(IT_IFMRKFGH2).
*--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_IFMRKFGH INDEX 1 INTO DATA(WA_IFMRKFGH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IFMRKFGH>-PRAEFIX = 1.
<IFMRKFGH>-GLD = 1.
<IFMRKFGH>-EPL = 1.
<IFMRKFGH>-ABSCHN = 1.
<IFMRKFGH>-UABSCH = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IFMRKFGH-GRUPPE, sy-vline,
  WA_IFMRKFGH-HGR, sy-vline,
  WA_IFMRKFGH-GRP, sy-vline,
  WA_IFMRKFGH-UGR, sy-vline,
  WA_IFMRKFGH-MASS, sy-vline,
  WA_IFMRKFGH-HMASS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IFMRKFGH 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_IFMRKFGH 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_IFMRKFGH INTO WA_IFMRKFGH.


*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_IFMRKFGH_STR, 
PRAEFIX TYPE STRING,
GLD TYPE STRING,
EPL TYPE STRING,
ABSCHN TYPE STRING,
UABSCH TYPE STRING,
GRUPPE TYPE STRING,
HGR TYPE STRING,
GRP TYPE STRING,
UGR TYPE STRING,
MASS TYPE STRING,
HMASS TYPE STRING,
MASSN TYPE STRING,
UMASS TYPE STRING,
OBJ TYPE STRING,
PRUEFZ TYPE STRING,
TEXT1 TYPE STRING,
TEXT2 TYPE STRING,
OB_PLJ TYPE STRING,
FPL_1 TYPE STRING,
FPL_2 TYPE STRING,
FPL_3 TYPE STRING,
FPL_4 TYPE STRING,
COL1 TYPE STRING,
COL2 TYPE STRING,
COL3 TYPE STRING,
COL4 TYPE STRING,
COL5 TYPE STRING,
COL6 TYPE STRING,
COL7 TYPE STRING,
COL8 TYPE STRING,
COL9 TYPE STRING,
COL10 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IFMRKFGH_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_IFMRKFGH_STR-PRAEFIX sy-vline 
WA_IFMRKFGH_STR-GLD sy-vline 
WA_IFMRKFGH_STR-EPL sy-vline 
WA_IFMRKFGH_STR-ABSCHN sy-vline 
WA_IFMRKFGH_STR-UABSCH sy-vline 
WA_IFMRKFGH_STR-GRUPPE sy-vline 
WA_IFMRKFGH_STR-HGR sy-vline 
WA_IFMRKFGH_STR-GRP sy-vline 
WA_IFMRKFGH_STR-UGR sy-vline 
WA_IFMRKFGH_STR-MASS sy-vline 
WA_IFMRKFGH_STR-HMASS sy-vline 
WA_IFMRKFGH_STR-MASSN sy-vline 
WA_IFMRKFGH_STR-UMASS sy-vline 
WA_IFMRKFGH_STR-OBJ sy-vline 
WA_IFMRKFGH_STR-PRUEFZ sy-vline 
WA_IFMRKFGH_STR-TEXT1 sy-vline 
WA_IFMRKFGH_STR-TEXT2 sy-vline 
WA_IFMRKFGH_STR-OB_PLJ sy-vline 
WA_IFMRKFGH_STR-FPL_1 sy-vline 
WA_IFMRKFGH_STR-FPL_2 sy-vline 
WA_IFMRKFGH_STR-FPL_3 sy-vline 
WA_IFMRKFGH_STR-FPL_4 sy-vline 
WA_IFMRKFGH_STR-COL1 sy-vline 
WA_IFMRKFGH_STR-COL2 sy-vline 
WA_IFMRKFGH_STR-COL3 sy-vline 
WA_IFMRKFGH_STR-COL4 sy-vline 
WA_IFMRKFGH_STR-COL5 sy-vline 
WA_IFMRKFGH_STR-COL6 sy-vline 
WA_IFMRKFGH_STR-COL7 sy-vline 
WA_IFMRKFGH_STR-COL8 sy-vline 
WA_IFMRKFGH_STR-COL9 sy-vline 
WA_IFMRKFGH_STR-COL10 sy-vline      INTO ld_text SEPARATED BY SPACE.

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