ABAP Select data from SAP table RGUUMS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RGUUMS
*  INTO TABLE @DATA(IT_RGUUMS2).
*--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_RGUUMS INDEX 1 INTO DATA(WA_RGUUMS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RGUUMS>-MIGMODE = 1.
<RGUUMS>-ACCUM = 1.
<RGUUMS>-EXPORT = 1.
<RGUUMS>-IMPORT = 1.
<RGUUMS>-FILE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RGUUMS-EXIST, sy-vline,
  WA_RGUUMS-ADD, sy-vline,
  WA_RGUUMS-STANDARD, sy-vline,
  WA_RGUUMS-PORTION, sy-vline,
  WA_RGUUMS-COUNT, sy-vline,
  WA_RGUUMS-NUMBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RGUUMS 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_RGUUMS 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_RGUUMS INTO WA_RGUUMS.


*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_RGUUMS_STR, 
MIGMODE TYPE STRING,
ACCUM TYPE STRING,
EXPORT TYPE STRING,
IMPORT TYPE STRING,
FILE TYPE STRING,
EXIST TYPE STRING,
ADD TYPE STRING,
STANDARD TYPE STRING,
PORTION TYPE STRING,
COUNT TYPE STRING,
NUMBER TYPE STRING,
MOV_DEF TYPE STRING,
MOV_CHECK TYPE STRING,
RESSOURCE TYPE STRING,
TOTAL TYPE STRING,
COMPARE TYPE STRING,
SHOW TYPE STRING,
CUSTOMIZE TYPE STRING,
GEN_RW TYPE STRING,
SINGLE TYPE STRING,
DELETE TYPE STRING,
FR_TAB TYPE STRING,
TO_TAB TYPE STRING,
ENQUEUE TYPE STRING,
DELETE_SET TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RGUUMS_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_RGUUMS_STR-MIGMODE sy-vline 
WA_RGUUMS_STR-ACCUM sy-vline 
WA_RGUUMS_STR-EXPORT sy-vline 
WA_RGUUMS_STR-IMPORT sy-vline 
WA_RGUUMS_STR-FILE sy-vline 
WA_RGUUMS_STR-EXIST sy-vline 
WA_RGUUMS_STR-ADD sy-vline 
WA_RGUUMS_STR-STANDARD sy-vline 
WA_RGUUMS_STR-PORTION sy-vline 
WA_RGUUMS_STR-COUNT sy-vline 
WA_RGUUMS_STR-NUMBER sy-vline 
WA_RGUUMS_STR-MOV_DEF sy-vline 
WA_RGUUMS_STR-MOV_CHECK sy-vline 
WA_RGUUMS_STR-RESSOURCE sy-vline 
WA_RGUUMS_STR-TOTAL sy-vline 
WA_RGUUMS_STR-COMPARE sy-vline 
WA_RGUUMS_STR-SHOW sy-vline 
WA_RGUUMS_STR-CUSTOMIZE sy-vline 
WA_RGUUMS_STR-GEN_RW sy-vline 
WA_RGUUMS_STR-SINGLE sy-vline 
WA_RGUUMS_STR-DELETE sy-vline 
WA_RGUUMS_STR-FR_TAB sy-vline 
WA_RGUUMS_STR-TO_TAB sy-vline 
WA_RGUUMS_STR-ENQUEUE sy-vline 
WA_RGUUMS_STR-DELETE_SET sy-vline      INTO ld_text SEPARATED BY SPACE.

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