ABAP Select data from SAP table MDPM_PLNUM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDPM_PLNUM
*  INTO TABLE @DATA(IT_MDPM_PLNUM2).
*--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_MDPM_PLNUM INDEX 1 INTO DATA(WA_MDPM_PLNUM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDPM_PLNUM>-PLNUM = 1.
<MDPM_PLNUM>-AUFST = 1.
<MDPM_PLNUM>-AUFWG = 1.
<MDPM_PLNUM>-STSOR = 1.
<MDPM_PLNUM>-MATNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDPM_PLNUM-WERKS, sy-vline,
  WA_MDPM_PLNUM-BDART, sy-vline,
  WA_MDPM_PLNUM-POSTP, sy-vline,
  WA_MDPM_PLNUM-POSNR, sy-vline,
  WA_MDPM_PLNUM-SOBKZ, sy-vline,
  WA_MDPM_PLNUM-VMENG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDPM_PLNUM 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_MDPM_PLNUM 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_MDPM_PLNUM INTO WA_MDPM_PLNUM.


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

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

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

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

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

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

*Conversion exit NUMCV, internal->external for field STLNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_MDPM_PLNUM-STLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDPM_PLNUM-STLNR.
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_MDPM_PLNUM_STR, 
PLNUM TYPE STRING,
AUFST TYPE STRING,
AUFWG TYPE STRING,
STSOR TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
BDART TYPE STRING,
POSTP TYPE STRING,
POSNR TYPE STRING,
SOBKZ TYPE STRING,
VMENG TYPE STRING,
LAGME TYPE STRING,
ERFMG TYPE STRING,
ERFME TYPE STRING,
FMENG TYPE STRING,
BDTER TYPE STRING,
LGPRO TYPE STRING,
PRVBE TYPE STRING,
NFPKZ TYPE STRING,
KZAUS TYPE STRING,
NAFKZ TYPE STRING,
NFMAT TYPE STRING,
NOMNG TYPE STRING,
NFUML TYPE STRING,
STLTY TYPE STRING,
STLNR TYPE STRING,
STKNR TYPE STRING,
STKZA TYPE STRING,
STVKN TYPE STRING,
CUOBJ TYPE STRING,
RSNUM TYPE STRING,
RSPOS TYPE STRING,
RSART TYPE STRING,
VSTAT TYPE STRING,
VRPLA TYPE STRING,
XFEHL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDPM_PLNUM_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_MDPM_PLNUM_STR-PLNUM sy-vline 
WA_MDPM_PLNUM_STR-AUFST sy-vline 
WA_MDPM_PLNUM_STR-AUFWG sy-vline 
WA_MDPM_PLNUM_STR-STSOR sy-vline 
WA_MDPM_PLNUM_STR-MATNR sy-vline 
WA_MDPM_PLNUM_STR-WERKS sy-vline 
WA_MDPM_PLNUM_STR-BDART sy-vline 
WA_MDPM_PLNUM_STR-POSTP sy-vline 
WA_MDPM_PLNUM_STR-POSNR sy-vline 
WA_MDPM_PLNUM_STR-SOBKZ sy-vline 
WA_MDPM_PLNUM_STR-VMENG sy-vline 
WA_MDPM_PLNUM_STR-LAGME sy-vline 
WA_MDPM_PLNUM_STR-ERFMG sy-vline 
WA_MDPM_PLNUM_STR-ERFME sy-vline 
WA_MDPM_PLNUM_STR-FMENG sy-vline 
WA_MDPM_PLNUM_STR-BDTER sy-vline 
WA_MDPM_PLNUM_STR-LGPRO sy-vline 
WA_MDPM_PLNUM_STR-PRVBE sy-vline 
WA_MDPM_PLNUM_STR-NFPKZ sy-vline 
WA_MDPM_PLNUM_STR-KZAUS sy-vline 
WA_MDPM_PLNUM_STR-NAFKZ sy-vline 
WA_MDPM_PLNUM_STR-NFMAT sy-vline 
WA_MDPM_PLNUM_STR-NOMNG sy-vline 
WA_MDPM_PLNUM_STR-NFUML sy-vline 
WA_MDPM_PLNUM_STR-STLTY sy-vline 
WA_MDPM_PLNUM_STR-STLNR sy-vline 
WA_MDPM_PLNUM_STR-STKNR sy-vline 
WA_MDPM_PLNUM_STR-STKZA sy-vline 
WA_MDPM_PLNUM_STR-STVKN sy-vline 
WA_MDPM_PLNUM_STR-CUOBJ sy-vline 
WA_MDPM_PLNUM_STR-RSNUM sy-vline 
WA_MDPM_PLNUM_STR-RSPOS sy-vline 
WA_MDPM_PLNUM_STR-RSART sy-vline 
WA_MDPM_PLNUM_STR-VSTAT sy-vline 
WA_MDPM_PLNUM_STR-VRPLA sy-vline 
WA_MDPM_PLNUM_STR-XFEHL sy-vline      INTO ld_text SEPARATED BY SPACE.

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