ABAP Select data from SAP table RPCDMFB0 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RPCDMFB0 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 RPCDMFB0. 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 RPCDMFB0 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_RPCDMFB0 TYPE STANDARD TABLE OF RPCDMFB0,
      WA_RPCDMFB0 TYPE RPCDMFB0,
      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: <RPCDMFB0> TYPE RPCDMFB0.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RPCDMFB0.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RPCDMFB0
  INTO TABLE IT_RPCDMFB0.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RPCDMFB0
*  INTO TABLE @DATA(IT_RPCDMFB02).
*--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_RPCDMFB0 INDEX 1 INTO DATA(WA_RPCDMFB02).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RPCDMFB0 ASSIGNING <RPCDMFB0>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RPCDMFB0>-GENDT = 1.
<RPCDMFB0>-BALAN = 1.
<RPCDMFB0>-NRPER = 1.
<RPCDMFB0>-REEVL = 1.
<RPCDMFB0>-UFORM = 1.

ENDLOOP.

LOOP AT IT_RPCDMFB0 INTO WA_RPCDMFB0.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RPCDMFB0-UFXML, sy-vline,
  WA_RPCDMFB0-DHRSR, sy-vline,
  WA_RPCDMFB0-FLUSH, sy-vline,
  WA_RPCDMFB0-NOTFI, sy-vline,
  WA_RPCDMFB0-GLBID, sy-vline,
  WA_RPCDMFB0-ACB2A, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RPCDMFB0 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_RPCDMFB0 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_RPCDMFB0 INTO WA_RPCDMFB0.


*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_RPCDMFB0_STR, 
GENDT TYPE STRING,
BALAN TYPE STRING,
NRPER TYPE STRING,
REEVL TYPE STRING,
UFORM TYPE STRING,
UFXML TYPE STRING,
DHRSR TYPE STRING,
FLUSH TYPE STRING,
NOTFI TYPE STRING,
GLBID TYPE STRING,
ACB2A TYPE STRING,
TXB2A TYPE STRING,
DMFFI TYPE STRING,
CKHRS TYPE STRING,
UPALL TYPE STRING,
TYPDE TYPE STRING,
GLBDT TYPE STRING,
SECTR TYPE STRING,
SIMUL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RPCDMFB0_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_RPCDMFB0_STR-GENDT sy-vline 
WA_RPCDMFB0_STR-BALAN sy-vline 
WA_RPCDMFB0_STR-NRPER sy-vline 
WA_RPCDMFB0_STR-REEVL sy-vline 
WA_RPCDMFB0_STR-UFORM sy-vline 
WA_RPCDMFB0_STR-UFXML sy-vline 
WA_RPCDMFB0_STR-DHRSR sy-vline 
WA_RPCDMFB0_STR-FLUSH sy-vline 
WA_RPCDMFB0_STR-NOTFI sy-vline 
WA_RPCDMFB0_STR-GLBID sy-vline 
WA_RPCDMFB0_STR-ACB2A sy-vline 
WA_RPCDMFB0_STR-TXB2A sy-vline 
WA_RPCDMFB0_STR-DMFFI sy-vline 
WA_RPCDMFB0_STR-CKHRS sy-vline 
WA_RPCDMFB0_STR-UPALL sy-vline 
WA_RPCDMFB0_STR-TYPDE sy-vline 
WA_RPCDMFB0_STR-GLBDT sy-vline 
WA_RPCDMFB0_STR-SECTR sy-vline 
WA_RPCDMFB0_STR-SIMUL sy-vline      INTO ld_text SEPARATED BY SPACE.

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