ABAP Select data from SAP table FMR_INTERFACE_HEAD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FMR_INTERFACE_HEAD
*  INTO TABLE @DATA(IT_FMR_INTERFACE_HEAD2).
*--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_FMR_INTERFACE_HEAD INDEX 1 INTO DATA(WA_FMR_INTERFACE_HEAD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FMR_INTERFACE_HEAD>-BELNR = 1.
<FMR_INTERFACE_HEAD>-BLTYP = 1.
<FMR_INTERFACE_HEAD>-BLDAT = 1.
<FMR_INTERFACE_HEAD>-BUDAT = 1.
<FMR_INTERFACE_HEAD>-BLART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FMR_INTERFACE_HEAD-XBLNR, sy-vline,
  WA_FMR_INTERFACE_HEAD-FMRE_XBLNR2, sy-vline,
  WA_FMR_INTERFACE_HEAD-FMRE_XBLNR3, sy-vline,
  WA_FMR_INTERFACE_HEAD-WAERS, sy-vline,
  WA_FMR_INTERFACE_HEAD-BUKRS, sy-vline,
  WA_FMR_INTERFACE_HEAD-KURSF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FMR_INTERFACE_HEAD 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_FMR_INTERFACE_HEAD 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_FMR_INTERFACE_HEAD INTO WA_FMR_INTERFACE_HEAD.


*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 ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FMR_INTERFACE_HEAD-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMR_INTERFACE_HEAD-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field KURSF
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_FMR_INTERFACE_HEAD-KURSF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMR_INTERFACE_HEAD-KURSF.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field RFSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FMR_INTERFACE_HEAD-RFSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMR_INTERFACE_HEAD-RFSYS.
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_FMR_INTERFACE_HEAD_STR, 
BELNR TYPE STRING,
BLTYP TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
BLART TYPE STRING,
XBLNR TYPE STRING,
FMRE_XBLNR2 TYPE STRING,
FMRE_XBLNR3 TYPE STRING,
WAERS TYPE STRING,
BUKRS TYPE STRING,
KURSF TYPE STRING,
WWERT TYPE STRING,
COMBUDGET TYPE STRING,
PAYBUDGET TYPE STRING,
LOTKZ TYPE STRING,
KTEXT TYPE STRING,
RFBLNR TYPE STRING,
RFORG TYPE STRING,
RFTYP TYPE STRING,
RFSYS TYPE STRING,
DOCLOCK TYPE STRING,
PARK_DOC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FMR_INTERFACE_HEAD_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_FMR_INTERFACE_HEAD_STR-BELNR sy-vline 
WA_FMR_INTERFACE_HEAD_STR-BLTYP sy-vline 
WA_FMR_INTERFACE_HEAD_STR-BLDAT sy-vline 
WA_FMR_INTERFACE_HEAD_STR-BUDAT sy-vline 
WA_FMR_INTERFACE_HEAD_STR-BLART sy-vline 
WA_FMR_INTERFACE_HEAD_STR-XBLNR sy-vline 
WA_FMR_INTERFACE_HEAD_STR-FMRE_XBLNR2 sy-vline 
WA_FMR_INTERFACE_HEAD_STR-FMRE_XBLNR3 sy-vline 
WA_FMR_INTERFACE_HEAD_STR-WAERS sy-vline 
WA_FMR_INTERFACE_HEAD_STR-BUKRS sy-vline 
WA_FMR_INTERFACE_HEAD_STR-KURSF sy-vline 
WA_FMR_INTERFACE_HEAD_STR-WWERT sy-vline 
WA_FMR_INTERFACE_HEAD_STR-COMBUDGET sy-vline 
WA_FMR_INTERFACE_HEAD_STR-PAYBUDGET sy-vline 
WA_FMR_INTERFACE_HEAD_STR-LOTKZ sy-vline 
WA_FMR_INTERFACE_HEAD_STR-KTEXT sy-vline 
WA_FMR_INTERFACE_HEAD_STR-RFBLNR sy-vline 
WA_FMR_INTERFACE_HEAD_STR-RFORG sy-vline 
WA_FMR_INTERFACE_HEAD_STR-RFTYP sy-vline 
WA_FMR_INTERFACE_HEAD_STR-RFSYS sy-vline 
WA_FMR_INTERFACE_HEAD_STR-DOCLOCK sy-vline 
WA_FMR_INTERFACE_HEAD_STR-PARK_DOC sy-vline      INTO ld_text SEPARATED BY SPACE.

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