ABAP Select data from SAP table MRM_TESTS_FRSEG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MRM_TESTS_FRSEG
*  INTO TABLE @DATA(IT_MRM_TESTS_FRSEG2).
*--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_MRM_TESTS_FRSEG INDEX 1 INTO DATA(WA_MRM_TESTS_FRSEG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MRM_TESTS_FRSEG>-EBELN = 1.
<MRM_TESTS_FRSEG>-EBELP = 1.
<MRM_TESTS_FRSEG>-LFBNR = 1.
<MRM_TESTS_FRSEG>-LFGJA = 1.
<MRM_TESTS_FRSEG>-LFPOS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MRM_TESTS_FRSEG-PACKNO, sy-vline,
  WA_MRM_TESTS_FRSEG-INTROW, sy-vline,
  WA_MRM_TESTS_FRSEG-WEBRE, sy-vline,
  WA_MRM_TESTS_FRSEG-LEBRE, sy-vline,
  WA_MRM_TESTS_FRSEG-MENGE, sy-vline,
  WA_MRM_TESTS_FRSEG-BPMNG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MRM_TESTS_FRSEG 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_MRM_TESTS_FRSEG 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_MRM_TESTS_FRSEG INTO WA_MRM_TESTS_FRSEG.


*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 EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MRM_TESTS_FRSEG-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MRM_TESTS_FRSEG-EBELN.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit GJAHR, internal->external for field LFGJA
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MRM_TESTS_FRSEG-LFGJA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MRM_TESTS_FRSEG-LFGJA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MRM_TESTS_FRSEG-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MRM_TESTS_FRSEG-MEINS.
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_MRM_TESTS_FRSEG_STR, 
EBELN TYPE STRING,
EBELP TYPE STRING,
LFBNR TYPE STRING,
LFGJA TYPE STRING,
LFPOS TYPE STRING,
PACKNO TYPE STRING,
INTROW TYPE STRING,
WEBRE TYPE STRING,
LEBRE TYPE STRING,
MENGE TYPE STRING,
BPMNG TYPE STRING,
WRBTR TYPE STRING,
BNKAN_FW TYPE STRING,
MWSKZ TYPE STRING,
TXJCD TYPE STRING,
XEKBE TYPE STRING,
XEKBZ TYPE STRING,
KSCHL TYPE STRING,
STUNR TYPE STRING,
ZAEHK TYPE STRING,
INVREL TYPE STRING,
XDINV TYPE STRING,
INV_ITM_ORIGIN TYPE STRING,
XBLNR TYPE STRING,
MEINS TYPE STRING,
CI_RBWWR TYPE STRING,
CI_RBMNG TYPE STRING,
SHKZG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MRM_TESTS_FRSEG_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_MRM_TESTS_FRSEG_STR-EBELN sy-vline 
WA_MRM_TESTS_FRSEG_STR-EBELP sy-vline 
WA_MRM_TESTS_FRSEG_STR-LFBNR sy-vline 
WA_MRM_TESTS_FRSEG_STR-LFGJA sy-vline 
WA_MRM_TESTS_FRSEG_STR-LFPOS sy-vline 
WA_MRM_TESTS_FRSEG_STR-PACKNO sy-vline 
WA_MRM_TESTS_FRSEG_STR-INTROW sy-vline 
WA_MRM_TESTS_FRSEG_STR-WEBRE sy-vline 
WA_MRM_TESTS_FRSEG_STR-LEBRE sy-vline 
WA_MRM_TESTS_FRSEG_STR-MENGE sy-vline 
WA_MRM_TESTS_FRSEG_STR-BPMNG sy-vline 
WA_MRM_TESTS_FRSEG_STR-WRBTR sy-vline 
WA_MRM_TESTS_FRSEG_STR-BNKAN_FW sy-vline 
WA_MRM_TESTS_FRSEG_STR-MWSKZ sy-vline 
WA_MRM_TESTS_FRSEG_STR-TXJCD sy-vline 
WA_MRM_TESTS_FRSEG_STR-XEKBE sy-vline 
WA_MRM_TESTS_FRSEG_STR-XEKBZ sy-vline 
WA_MRM_TESTS_FRSEG_STR-KSCHL sy-vline 
WA_MRM_TESTS_FRSEG_STR-STUNR sy-vline 
WA_MRM_TESTS_FRSEG_STR-ZAEHK sy-vline 
WA_MRM_TESTS_FRSEG_STR-INVREL sy-vline 
WA_MRM_TESTS_FRSEG_STR-XDINV sy-vline 
WA_MRM_TESTS_FRSEG_STR-INV_ITM_ORIGIN sy-vline 
WA_MRM_TESTS_FRSEG_STR-XBLNR sy-vline 
WA_MRM_TESTS_FRSEG_STR-MEINS sy-vline 
WA_MRM_TESTS_FRSEG_STR-CI_RBWWR sy-vline 
WA_MRM_TESTS_FRSEG_STR-CI_RBMNG sy-vline 
WA_MRM_TESTS_FRSEG_STR-SHKZG sy-vline      INTO ld_text SEPARATED BY SPACE.

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