ABAP Select data from SAP table RMPAB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RMPAB
*  INTO TABLE @DATA(IT_RMPAB2).
*--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_RMPAB INDEX 1 INTO DATA(WA_RMPAB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RMPAB>-MAINMODE = 1.
<RMPAB>-PABTIM = 1.
<RMPAB>-PABLUZ = 1.
<RMPAB>-PABLDT = 1.
<RMPAB>-PABLUZK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RMPAB-PABLDTK, sy-vline,
  WA_RMPAB-DIALOG, sy-vline,
  WA_RMPAB-PABNUM, sy-vline,
  WA_RMPAB-PABPOS, sy-vline,
  WA_RMPAB-MATNR, sy-vline,
  WA_RMPAB-PABMNG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RMPAB 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_RMPAB 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_RMPAB INTO WA_RMPAB.


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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RMPAB-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMPAB-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RMPAB-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMPAB-MEINS.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RMPAB-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMPAB-VBELN.
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_RMPAB_STR, 
MAINMODE TYPE STRING,
PABTIM TYPE STRING,
PABLUZ TYPE STRING,
PABLDT TYPE STRING,
PABLUZK TYPE STRING,
PABLDTK TYPE STRING,
DIALOG TYPE STRING,
PABNUM TYPE STRING,
PABPOS TYPE STRING,
MATNR TYPE STRING,
PABMNG TYPE STRING,
MEINS TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
ABLAD TYPE STRING,
PRVBE TYPE STRING,
PABTIMR TYPE STRING,
PABWEF TYPE STRING,
PABWEM TYPE STRING,
PABLUZR TYPE STRING,
PABLDTR TYPE STRING,
PABWEDU TYPE STRING,
BUDAT TYPE STRING,
BLDAT TYPE STRING,
BKTXT TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
PABDLQTY TYPE STRING,
LFSNR TYPE STRING,
WERKS TYPE STRING,
LIFNR TYPE STRING,
LGBZO TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RMPAB_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_RMPAB_STR-MAINMODE sy-vline 
WA_RMPAB_STR-PABTIM sy-vline 
WA_RMPAB_STR-PABLUZ sy-vline 
WA_RMPAB_STR-PABLDT sy-vline 
WA_RMPAB_STR-PABLUZK sy-vline 
WA_RMPAB_STR-PABLDTK sy-vline 
WA_RMPAB_STR-DIALOG sy-vline 
WA_RMPAB_STR-PABNUM sy-vline 
WA_RMPAB_STR-PABPOS sy-vline 
WA_RMPAB_STR-MATNR sy-vline 
WA_RMPAB_STR-PABMNG sy-vline 
WA_RMPAB_STR-MEINS sy-vline 
WA_RMPAB_STR-EBELN sy-vline 
WA_RMPAB_STR-EBELP sy-vline 
WA_RMPAB_STR-ABLAD sy-vline 
WA_RMPAB_STR-PRVBE sy-vline 
WA_RMPAB_STR-PABTIMR sy-vline 
WA_RMPAB_STR-PABWEF sy-vline 
WA_RMPAB_STR-PABWEM sy-vline 
WA_RMPAB_STR-PABLUZR sy-vline 
WA_RMPAB_STR-PABLDTR sy-vline 
WA_RMPAB_STR-PABWEDU sy-vline 
WA_RMPAB_STR-BUDAT sy-vline 
WA_RMPAB_STR-BLDAT sy-vline 
WA_RMPAB_STR-BKTXT sy-vline 
WA_RMPAB_STR-LGORT sy-vline 
WA_RMPAB_STR-CHARG sy-vline 
WA_RMPAB_STR-PABDLQTY sy-vline 
WA_RMPAB_STR-LFSNR sy-vline 
WA_RMPAB_STR-WERKS sy-vline 
WA_RMPAB_STR-LIFNR sy-vline 
WA_RMPAB_STR-LGBZO sy-vline 
WA_RMPAB_STR-VBELN sy-vline 
WA_RMPAB_STR-POSNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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