ABAP Select data from SAP table USRMM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM USRMM
*  INTO TABLE @DATA(IT_USRMM2).
*--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_USRMM INDEX 1 INTO DATA(WA_USRMM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<USRMM>-MANDT = 1.
<USRMM>-UNAME = 1.
<USRMM>-MBRSH = 1.
<USRMM>-WERKS = 1.
<USRMM>-REF_WERKS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_USRMM-LGORT, sy-vline,
  WA_USRMM-REF_LGORT, sy-vline,
  WA_USRMM-BUKRS, sy-vline,
  WA_USRMM-REF_BUKRS, sy-vline,
  WA_USRMM-BWKEY, sy-vline,
  WA_USRMM-REF_BWKEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_USRMM 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_USRMM 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_USRMM INTO WA_USRMM.


*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_USRMM_STR, 
MANDT TYPE STRING,
UNAME TYPE STRING,
MBRSH TYPE STRING,
WERKS TYPE STRING,
REF_WERKS TYPE STRING,
LGORT TYPE STRING,
REF_LGORT TYPE STRING,
BUKRS TYPE STRING,
REF_BUKRS TYPE STRING,
BWKEY TYPE STRING,
REF_BWKEY TYPE STRING,
BWTAR TYPE STRING,
REF_BWTAR TYPE STRING,
VKORG TYPE STRING,
REF_VKORG TYPE STRING,
VTWEG TYPE STRING,
REF_VTWEG TYPE STRING,
LGNUM TYPE STRING,
REF_LGNUM TYPE STRING,
LGTYP TYPE STRING,
REF_LGTYP TYPE STRING,
DISPR TYPE STRING,
PROPR TYPE STRING,
XEIA1 TYPE STRING,
XEIB1 TYPE STRING,
XEID1 TYPE STRING,
XEID2 TYPE STRING,
XEIE1 TYPE STRING,
XEIE2 TYPE STRING,
XEIK1 TYPE STRING,
XEIL1 TYPE STRING,
XEIP1 TYPE STRING,
XEIQ1 TYPE STRING,
XEIS1 TYPE STRING,
XEIV1 TYPE STRING,
XEIV2 TYPE STRING,
XEIV3 TYPE STRING,
XEIV4 TYPE STRING,
XEIX1 TYPE STRING,
XEIZ1 TYPE STRING,
AAUSW TYPE STRING,
ASCHL TYPE STRING,
ABRSH TYPE STRING,
XEIC1 TYPE STRING,
XEIF1 TYPE STRING,
XEIG1 TYPE STRING,
XEID3 TYPE STRING,
XEIA2 TYPE STRING,
BDREF TYPE STRING,
XEIVE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_USRMM_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_USRMM_STR-MANDT sy-vline 
WA_USRMM_STR-UNAME sy-vline 
WA_USRMM_STR-MBRSH sy-vline 
WA_USRMM_STR-WERKS sy-vline 
WA_USRMM_STR-REF_WERKS sy-vline 
WA_USRMM_STR-LGORT sy-vline 
WA_USRMM_STR-REF_LGORT sy-vline 
WA_USRMM_STR-BUKRS sy-vline 
WA_USRMM_STR-REF_BUKRS sy-vline 
WA_USRMM_STR-BWKEY sy-vline 
WA_USRMM_STR-REF_BWKEY sy-vline 
WA_USRMM_STR-BWTAR sy-vline 
WA_USRMM_STR-REF_BWTAR sy-vline 
WA_USRMM_STR-VKORG sy-vline 
WA_USRMM_STR-REF_VKORG sy-vline 
WA_USRMM_STR-VTWEG sy-vline 
WA_USRMM_STR-REF_VTWEG sy-vline 
WA_USRMM_STR-LGNUM sy-vline 
WA_USRMM_STR-REF_LGNUM sy-vline 
WA_USRMM_STR-LGTYP sy-vline 
WA_USRMM_STR-REF_LGTYP sy-vline 
WA_USRMM_STR-DISPR sy-vline 
WA_USRMM_STR-PROPR sy-vline 
WA_USRMM_STR-XEIA1 sy-vline 
WA_USRMM_STR-XEIB1 sy-vline 
WA_USRMM_STR-XEID1 sy-vline 
WA_USRMM_STR-XEID2 sy-vline 
WA_USRMM_STR-XEIE1 sy-vline 
WA_USRMM_STR-XEIE2 sy-vline 
WA_USRMM_STR-XEIK1 sy-vline 
WA_USRMM_STR-XEIL1 sy-vline 
WA_USRMM_STR-XEIP1 sy-vline 
WA_USRMM_STR-XEIQ1 sy-vline 
WA_USRMM_STR-XEIS1 sy-vline 
WA_USRMM_STR-XEIV1 sy-vline 
WA_USRMM_STR-XEIV2 sy-vline 
WA_USRMM_STR-XEIV3 sy-vline 
WA_USRMM_STR-XEIV4 sy-vline 
WA_USRMM_STR-XEIX1 sy-vline 
WA_USRMM_STR-XEIZ1 sy-vline 
WA_USRMM_STR-AAUSW sy-vline 
WA_USRMM_STR-ASCHL sy-vline 
WA_USRMM_STR-ABRSH sy-vline 
WA_USRMM_STR-XEIC1 sy-vline 
WA_USRMM_STR-XEIF1 sy-vline 
WA_USRMM_STR-XEIG1 sy-vline 
WA_USRMM_STR-XEID3 sy-vline 
WA_USRMM_STR-XEIA2 sy-vline 
WA_USRMM_STR-BDREF sy-vline 
WA_USRMM_STR-XEIVE sy-vline      INTO ld_text SEPARATED BY SPACE.

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