ABAP Select data from SAP table RMPKR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RMPKR
*  INTO TABLE @DATA(IT_RMPKR2).
*--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_RMPKR INDEX 1 INTO DATA(WA_RMPKR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RMPKR>-PKNUM = 1.
<RMPKR>-MATNR = 1.
<RMPKR>-WERKS = 1.
<RMPKR>-PRVBE = 1.
<RMPKR>-MAKTX = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RMPKR-PVBTX, sy-vline,
  WA_RMPKR-STEIG, sy-vline,
  WA_RMPKR-STFRD, sy-vline,
  WA_RMPKR-STUML, sy-vline,
  WA_RMPKR-MATVL, sy-vline,
  WA_RMPKR-WRKVL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RMPKR 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_RMPKR 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_RMPKR INTO WA_RMPKR.


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

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

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

*Conversion exit ALPHA, internal->external for field PACKV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RMPKR-PACKV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMPKR-PACKV.
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_RMPKR_STR, 
PKNUM TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
PRVBE TYPE STRING,
MAKTX TYPE STRING,
PVBTX TYPE STRING,
STEIG TYPE STRING,
STFRD TYPE STRING,
STUML TYPE STRING,
MATVL TYPE STRING,
WRKVL TYPE STRING,
PVBVL TYPE STRING,
TXMAT TYPE STRING,
TXBEH TYPE STRING,
APPPK TYPE STRING,
PKSTU TYPE STRING,
ASWBQ TYPE STRING,
ASWBV TYPE STRING,
PKDKZ TYPE STRING,
UWNAM TYPE STRING,
ULNAM TYPE STRING,
LGNAM TYPE STRING,
LGORT TYPE STRING,
RGVER TYPE STRING,
PKKLA TYPE STRING,
PKIMP TYPE STRING,
AENMG TYPE STRING,
AENAZ TYPE STRING,
NGBAZ TYPE STRING,
NAENB TYPE STRING,
LOEKZ TYPE STRING,
PKMES TYPE STRING,
KCEDT TYPE STRING,
KPDAT TYPE STRING,
KPNEA TYPE STRING,
KPMAA TYPE STRING,
KPMIA TYPE STRING,
KPNEM TYPE STRING,
KPMAM TYPE STRING,
KPMIM TYPE STRING,
QUPVB TYPE STRING,
QPVBT TYPE STRING,
LGNUM TYPE STRING,
LGTYP TYPE STRING,
LGPLA TYPE STRING,
LNUMT TYPE STRING,
LTYPT TYPE STRING,
FTEXT TYPE STRING,
WERKS_U TYPE STRING,
RTEXT TYPE STRING,
PACKV TYPE STRING,
FIELDTEXT TYPE STRING,
MASSBEARBEITUNG TYPE STRING,
KPNOBATCH TYPE STRING,
KPNEXTALL TYPE STRING,
KPMAXALL TYPE STRING,
KPMINALL TYPE STRING,
KPTRIALL TYPE STRING,
LCM_STATUS TYPE STRING,
TWERK TYPE STRING,
TPVBE TYPE STRING,
AENTRI TYPE STRING,
LGNUM_EWM TYPE STRING,
LGNUM_EWM_TEXT TYPE STRING,
LGTYP_EWM TYPE STRING,
LGTYP_EWM_TEXT TYPE STRING,
PRCTY TYPE STRING,
PRCTY_EWM_TEXT TYPE STRING,
NLPLA TYPE STRING,
VLPLA TYPE STRING,
VLGTYP_EWM TYPE STRING,
VLGTYP_EWM_TEXT TYPE STRING,
BERKZ_TEXT TYPE STRING,
PKSUM TYPE STRING,
PKASM TYPE STRING,
PKSEQ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RMPKR_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_RMPKR_STR-PKNUM sy-vline 
WA_RMPKR_STR-MATNR sy-vline 
WA_RMPKR_STR-WERKS sy-vline 
WA_RMPKR_STR-PRVBE sy-vline 
WA_RMPKR_STR-MAKTX sy-vline 
WA_RMPKR_STR-PVBTX sy-vline 
WA_RMPKR_STR-STEIG sy-vline 
WA_RMPKR_STR-STFRD sy-vline 
WA_RMPKR_STR-STUML sy-vline 
WA_RMPKR_STR-MATVL sy-vline 
WA_RMPKR_STR-WRKVL sy-vline 
WA_RMPKR_STR-PVBVL sy-vline 
WA_RMPKR_STR-TXMAT sy-vline 
WA_RMPKR_STR-TXBEH sy-vline 
WA_RMPKR_STR-APPPK sy-vline 
WA_RMPKR_STR-PKSTU sy-vline 
WA_RMPKR_STR-ASWBQ sy-vline 
WA_RMPKR_STR-ASWBV sy-vline 
WA_RMPKR_STR-PKDKZ sy-vline 
WA_RMPKR_STR-UWNAM sy-vline 
WA_RMPKR_STR-ULNAM sy-vline 
WA_RMPKR_STR-LGNAM sy-vline 
WA_RMPKR_STR-LGORT sy-vline 
WA_RMPKR_STR-RGVER sy-vline 
WA_RMPKR_STR-PKKLA sy-vline 
WA_RMPKR_STR-PKIMP sy-vline 
WA_RMPKR_STR-AENMG sy-vline 
WA_RMPKR_STR-AENAZ sy-vline 
WA_RMPKR_STR-NGBAZ sy-vline 
WA_RMPKR_STR-NAENB sy-vline 
WA_RMPKR_STR-LOEKZ sy-vline 
WA_RMPKR_STR-PKMES sy-vline 
WA_RMPKR_STR-KCEDT sy-vline 
WA_RMPKR_STR-KPDAT sy-vline 
WA_RMPKR_STR-KPNEA sy-vline 
WA_RMPKR_STR-KPMAA sy-vline 
WA_RMPKR_STR-KPMIA sy-vline 
WA_RMPKR_STR-KPNEM sy-vline 
WA_RMPKR_STR-KPMAM sy-vline 
WA_RMPKR_STR-KPMIM sy-vline 
WA_RMPKR_STR-QUPVB sy-vline 
WA_RMPKR_STR-QPVBT sy-vline 
WA_RMPKR_STR-LGNUM sy-vline 
WA_RMPKR_STR-LGTYP sy-vline 
WA_RMPKR_STR-LGPLA sy-vline 
WA_RMPKR_STR-LNUMT sy-vline 
WA_RMPKR_STR-LTYPT sy-vline 
WA_RMPKR_STR-FTEXT sy-vline 
WA_RMPKR_STR-WERKS_U sy-vline 
WA_RMPKR_STR-RTEXT sy-vline 
WA_RMPKR_STR-PACKV sy-vline 
WA_RMPKR_STR-FIELDTEXT sy-vline 
WA_RMPKR_STR-MASSBEARBEITUNG sy-vline 
WA_RMPKR_STR-KPNOBATCH sy-vline 
WA_RMPKR_STR-KPNEXTALL sy-vline 
WA_RMPKR_STR-KPMAXALL sy-vline 
WA_RMPKR_STR-KPMINALL sy-vline 
WA_RMPKR_STR-KPTRIALL sy-vline 
WA_RMPKR_STR-LCM_STATUS sy-vline 
WA_RMPKR_STR-TWERK sy-vline 
WA_RMPKR_STR-TPVBE sy-vline 
WA_RMPKR_STR-AENTRI sy-vline 
WA_RMPKR_STR-LGNUM_EWM sy-vline 
WA_RMPKR_STR-LGNUM_EWM_TEXT sy-vline 
WA_RMPKR_STR-LGTYP_EWM sy-vline 
WA_RMPKR_STR-LGTYP_EWM_TEXT sy-vline 
WA_RMPKR_STR-PRCTY sy-vline 
WA_RMPKR_STR-PRCTY_EWM_TEXT sy-vline 
WA_RMPKR_STR-NLPLA sy-vline 
WA_RMPKR_STR-VLPLA sy-vline 
WA_RMPKR_STR-VLGTYP_EWM sy-vline 
WA_RMPKR_STR-VLGTYP_EWM_TEXT sy-vline 
WA_RMPKR_STR-BERKZ_TEXT sy-vline 
WA_RMPKR_STR-PKSUM sy-vline 
WA_RMPKR_STR-PKASM sy-vline 
WA_RMPKR_STR-PKSEQ sy-vline      INTO ld_text SEPARATED BY SPACE.

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