ABAP Select data from SAP table IFMRKFPI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IFMRKFPI
*  INTO TABLE @DATA(IT_IFMRKFPI2).
*--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_IFMRKFPI INDEX 1 INTO DATA(WA_IFMRKFPI2).


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

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

ENDLOOP.

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

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


*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_IFMRKFPI_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,
POTYP TYPE STRING,
GL_NR TYPE STRING,
BEZEICH TYPE STRING,
BEZEICH1 TYPE STRING,
OB_PLJ TYPE STRING,
OB_LFD TYPE STRING,
ANS_PLJ1 TYPE STRING,
ANS_PLJ2 TYPE STRING,
ANS_PLJ3 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IFMRKFPI_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_IFMRKFPI_STR-PRAEFIX sy-vline 
WA_IFMRKFPI_STR-GLD sy-vline 
WA_IFMRKFPI_STR-EPL sy-vline 
WA_IFMRKFPI_STR-ABSCHN sy-vline 
WA_IFMRKFPI_STR-UABSCH sy-vline 
WA_IFMRKFPI_STR-GRUPPE sy-vline 
WA_IFMRKFPI_STR-HGR sy-vline 
WA_IFMRKFPI_STR-GRP sy-vline 
WA_IFMRKFPI_STR-UGR sy-vline 
WA_IFMRKFPI_STR-MASS sy-vline 
WA_IFMRKFPI_STR-HMASS sy-vline 
WA_IFMRKFPI_STR-MASSN sy-vline 
WA_IFMRKFPI_STR-UMASS sy-vline 
WA_IFMRKFPI_STR-OBJ sy-vline 
WA_IFMRKFPI_STR-PRUEFZ sy-vline 
WA_IFMRKFPI_STR-POTYP sy-vline 
WA_IFMRKFPI_STR-GL_NR sy-vline 
WA_IFMRKFPI_STR-BEZEICH sy-vline 
WA_IFMRKFPI_STR-BEZEICH1 sy-vline 
WA_IFMRKFPI_STR-OB_PLJ sy-vline 
WA_IFMRKFPI_STR-OB_LFD sy-vline 
WA_IFMRKFPI_STR-ANS_PLJ1 sy-vline 
WA_IFMRKFPI_STR-ANS_PLJ2 sy-vline 
WA_IFMRKFPI_STR-ANS_PLJ3 sy-vline      INTO ld_text SEPARATED BY SPACE.

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