ABAP Select data from SAP table RMXMS_PLFV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RMXMS_PLFV
*  INTO TABLE @DATA(IT_RMXMS_PLFV2).
*--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_RMXMS_PLFV INDEX 1 INTO DATA(WA_RMXMS_PLFV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RMXMS_PLFV>-PLFV_TKEY = 1.
<RMXMS_PLFV>-MANDT = 1.
<RMXMS_PLFV>-PLNTY = 1.
<RMXMS_PLFV>-PLNNR = 1.
<RMXMS_PLFV>-PLNKN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RMXMS_PLFV-PLNPH, sy-vline,
  WA_RMXMS_PLFV-PLNFT, sy-vline,
  WA_RMXMS_PLFV-MKMZL, sy-vline,
  WA_RMXMS_PLFV-ZAEHL, sy-vline,
  WA_RMXMS_PLFV-PLFV_AKEY, sy-vline,
  WA_RMXMS_PLFV-FVLNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RMXMS_PLFV 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_RMXMS_PLFV 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_RMXMS_PLFV INTO WA_RMXMS_PLFV.


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

*Conversion exit NUMCV, internal->external for field FVLNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_RMXMS_PLFV-FVLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMXMS_PLFV-FVLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ATINN, internal->external for field ATINN
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_RMXMS_PLFV-ATINN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMXMS_PLFV-ATINN.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field ATAW1
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RMXMS_PLFV-ATAW1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMXMS_PLFV-ATAW1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field TXTSP
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RMXMS_PLFV-TXTSP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMXMS_PLFV-TXTSP.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field AENNR_AUS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RMXMS_PLFV-AENNR_AUS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMXMS_PLFV-AENNR_AUS.
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_RMXMS_PLFV_STR, 
PLFV_TKEY TYPE STRING,
MANDT TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNKN TYPE STRING,
PLNPH TYPE STRING,
PLNFT TYPE STRING,
MKMZL TYPE STRING,
ZAEHL TYPE STRING,
PLFV_AKEY TYPE STRING,
FVLNR TYPE STRING,
PLFV_GR TYPE STRING,
ATINN TYPE STRING,
ATZHL TYPE STRING,
ATWRT TYPE STRING,
ATFLV TYPE STRING,
ATFLB TYPE STRING,
ATCOD TYPE STRING,
ATAWE TYPE STRING,
ATAW1 TYPE STRING,
ATFOR TYPE STRING,
WRTKZ TYPE STRING,
MEINN TYPE STRING,
VEINN TYPE STRING,
TXTSP TYPE STRING,
ATNAM TYPE STRING,
MR_TXT_OBJ TYPE STRING,
PLFV_MR TYPE STRING,
DATUV TYPE STRING,
LOEKZ TYPE STRING,
AENNR TYPE STRING,
ANDAT TYPE STRING,
ANNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
VBKZ TYPE STRING,
DATUB TYPE STRING,
AENNR_AUS TYPE STRING,
FLG_SEL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RMXMS_PLFV_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_RMXMS_PLFV_STR-PLFV_TKEY sy-vline 
WA_RMXMS_PLFV_STR-MANDT sy-vline 
WA_RMXMS_PLFV_STR-PLNTY sy-vline 
WA_RMXMS_PLFV_STR-PLNNR sy-vline 
WA_RMXMS_PLFV_STR-PLNKN sy-vline 
WA_RMXMS_PLFV_STR-PLNPH sy-vline 
WA_RMXMS_PLFV_STR-PLNFT sy-vline 
WA_RMXMS_PLFV_STR-MKMZL sy-vline 
WA_RMXMS_PLFV_STR-ZAEHL sy-vline 
WA_RMXMS_PLFV_STR-PLFV_AKEY sy-vline 
WA_RMXMS_PLFV_STR-FVLNR sy-vline 
WA_RMXMS_PLFV_STR-PLFV_GR sy-vline 
WA_RMXMS_PLFV_STR-ATINN sy-vline 
WA_RMXMS_PLFV_STR-ATZHL sy-vline 
WA_RMXMS_PLFV_STR-ATWRT sy-vline 
WA_RMXMS_PLFV_STR-ATFLV sy-vline 
WA_RMXMS_PLFV_STR-ATFLB sy-vline 
WA_RMXMS_PLFV_STR-ATCOD sy-vline 
WA_RMXMS_PLFV_STR-ATAWE sy-vline 
WA_RMXMS_PLFV_STR-ATAW1 sy-vline 
WA_RMXMS_PLFV_STR-ATFOR sy-vline 
WA_RMXMS_PLFV_STR-WRTKZ sy-vline 
WA_RMXMS_PLFV_STR-MEINN sy-vline 
WA_RMXMS_PLFV_STR-VEINN sy-vline 
WA_RMXMS_PLFV_STR-TXTSP sy-vline 
WA_RMXMS_PLFV_STR-ATNAM sy-vline 
WA_RMXMS_PLFV_STR-MR_TXT_OBJ sy-vline 
WA_RMXMS_PLFV_STR-PLFV_MR sy-vline 
WA_RMXMS_PLFV_STR-DATUV sy-vline 
WA_RMXMS_PLFV_STR-LOEKZ sy-vline 
WA_RMXMS_PLFV_STR-AENNR sy-vline 
WA_RMXMS_PLFV_STR-ANDAT sy-vline 
WA_RMXMS_PLFV_STR-ANNAM sy-vline 
WA_RMXMS_PLFV_STR-AEDAT sy-vline 
WA_RMXMS_PLFV_STR-AENAM sy-vline 
WA_RMXMS_PLFV_STR-VBKZ sy-vline 
WA_RMXMS_PLFV_STR-DATUB sy-vline 
WA_RMXMS_PLFV_STR-AENNR_AUS sy-vline 
WA_RMXMS_PLFV_STR-FLG_SEL sy-vline      INTO ld_text SEPARATED BY SPACE.

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