ABAP Select data from SAP table MRMRBBW_EXT_ITM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MRMRBBW_EXT_ITM
*  INTO TABLE @DATA(IT_MRMRBBW_EXT_ITM2).
*--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_MRMRBBW_EXT_ITM INDEX 1 INTO DATA(WA_MRMRBBW_EXT_ITM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MRMRBBW_EXT_ITM>-AFNAM = 1.
<MRMRBBW_EXT_ITM>-EKGRP = 1.
<MRMRBBW_EXT_ITM>-FKNUM = 1.
<MRMRBBW_EXT_ITM>-FKPOS = 1.
<MRMRBBW_EXT_ITM>-FPLNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MRMRBBW_EXT_ITM-HWAER, sy-vline,
  WA_MRMRBBW_EXT_ITM-LEBRE, sy-vline,
  WA_MRMRBBW_EXT_ITM-MATKL, sy-vline,
  WA_MRMRBBW_EXT_ITM-NETPR, sy-vline,
  WA_MRMRBBW_EXT_ITM-PEINH, sy-vline,
  WA_MRMRBBW_EXT_ITM-REPOS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MRMRBBW_EXT_ITM 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_MRMRBBW_EXT_ITM 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_MRMRBBW_EXT_ITM INTO WA_MRMRBBW_EXT_ITM.


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

*Conversion exit ALPHA, internal->external for field LIFNR2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MRMRBBW_EXT_ITM-LIFNR2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MRMRBBW_EXT_ITM-LIFNR2.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field BASME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MRMRBBW_EXT_ITM-BASME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MRMRBBW_EXT_ITM-BASME.
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_MRMRBBW_EXT_ITM_STR, 
AFNAM TYPE STRING,
EKGRP TYPE STRING,
FKNUM TYPE STRING,
FKPOS TYPE STRING,
FPLNR TYPE STRING,
HWAER TYPE STRING,
LEBRE TYPE STRING,
MATKL TYPE STRING,
NETPR TYPE STRING,
PEINH TYPE STRING,
REPOS TYPE STRING,
RETPO TYPE STRING,
TXZ01 TYPE STRING,
WEBRE TYPE STRING,
ERNAM TYPE STRING,
EKORG TYPE STRING,
LIFNR2 TYPE STRING,
KZBWS TYPE STRING,
KTPNR TYPE STRING,
KONNR TYPE STRING,
WEUNB TYPE STRING,
WEPOS TYPE STRING,
KTOPL TYPE STRING,
BEWAE TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
BASME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MRMRBBW_EXT_ITM_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_MRMRBBW_EXT_ITM_STR-AFNAM sy-vline 
WA_MRMRBBW_EXT_ITM_STR-EKGRP sy-vline 
WA_MRMRBBW_EXT_ITM_STR-FKNUM sy-vline 
WA_MRMRBBW_EXT_ITM_STR-FKPOS sy-vline 
WA_MRMRBBW_EXT_ITM_STR-FPLNR sy-vline 
WA_MRMRBBW_EXT_ITM_STR-HWAER sy-vline 
WA_MRMRBBW_EXT_ITM_STR-LEBRE sy-vline 
WA_MRMRBBW_EXT_ITM_STR-MATKL sy-vline 
WA_MRMRBBW_EXT_ITM_STR-NETPR sy-vline 
WA_MRMRBBW_EXT_ITM_STR-PEINH sy-vline 
WA_MRMRBBW_EXT_ITM_STR-REPOS sy-vline 
WA_MRMRBBW_EXT_ITM_STR-RETPO sy-vline 
WA_MRMRBBW_EXT_ITM_STR-TXZ01 sy-vline 
WA_MRMRBBW_EXT_ITM_STR-WEBRE sy-vline 
WA_MRMRBBW_EXT_ITM_STR-ERNAM sy-vline 
WA_MRMRBBW_EXT_ITM_STR-EKORG sy-vline 
WA_MRMRBBW_EXT_ITM_STR-LIFNR2 sy-vline 
WA_MRMRBBW_EXT_ITM_STR-KZBWS sy-vline 
WA_MRMRBBW_EXT_ITM_STR-KTPNR sy-vline 
WA_MRMRBBW_EXT_ITM_STR-KONNR sy-vline 
WA_MRMRBBW_EXT_ITM_STR-WEUNB sy-vline 
WA_MRMRBBW_EXT_ITM_STR-WEPOS sy-vline 
WA_MRMRBBW_EXT_ITM_STR-KTOPL sy-vline 
WA_MRMRBBW_EXT_ITM_STR-BEWAE sy-vline 
WA_MRMRBBW_EXT_ITM_STR-UMREZ sy-vline 
WA_MRMRBBW_EXT_ITM_STR-UMREN sy-vline 
WA_MRMRBBW_EXT_ITM_STR-BASME sy-vline      INTO ld_text SEPARATED BY SPACE.

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