ABAP Select data from SAP table MDPA_APO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDPA_APO
*  INTO TABLE @DATA(IT_MDPA_APO2).
*--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_MDPA_APO INDEX 1 INTO DATA(WA_MDPA_APO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDPA_APO>-PLSCN = 1.
<MDPA_APO>-MATNR = 1.
<MDPA_APO>-PLWRK = 1.
<MDPA_APO>-PWWRK = 1.
<MDPA_APO>-LGORT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDPA_APO-BESKZ, sy-vline,
  WA_MDPA_APO-SOBES, sy-vline,
  WA_MDPA_APO-GSMNG, sy-vline,
  WA_MDPA_APO-AVMNG, sy-vline,
  WA_MDPA_APO-LAGME, sy-vline,
  WA_MDPA_APO-PSTTR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDPA_APO 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_MDPA_APO 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_MDPA_APO INTO WA_MDPA_APO.


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

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

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

*Conversion exit ABPSP, internal->external for field PSPEL
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_MDPA_APO-PSPEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDPA_APO-PSPEL.
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_MDPA_APO_STR, 
PLSCN TYPE STRING,
MATNR TYPE STRING,
PLWRK TYPE STRING,
PWWRK TYPE STRING,
LGORT TYPE STRING,
BESKZ TYPE STRING,
SOBES TYPE STRING,
GSMNG TYPE STRING,
AVMNG TYPE STRING,
LAGME TYPE STRING,
PSTTR TYPE STRING,
PEDTR TYPE STRING,
UMSKZ TYPE STRING,
KNTTP TYPE STRING,
SOBKZ TYPE STRING,
KZVBR TYPE STRING,
KZBWS TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
PSPEL TYPE STRING,
SERNR TYPE STRING,
TECHS TYPE STRING,
VERID TYPE STRING,
CUOBJ TYPE STRING,
RSNUM TYPE STRING,
VRPLA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDPA_APO_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_MDPA_APO_STR-PLSCN sy-vline 
WA_MDPA_APO_STR-MATNR sy-vline 
WA_MDPA_APO_STR-PLWRK sy-vline 
WA_MDPA_APO_STR-PWWRK sy-vline 
WA_MDPA_APO_STR-LGORT sy-vline 
WA_MDPA_APO_STR-BESKZ sy-vline 
WA_MDPA_APO_STR-SOBES sy-vline 
WA_MDPA_APO_STR-GSMNG sy-vline 
WA_MDPA_APO_STR-AVMNG sy-vline 
WA_MDPA_APO_STR-LAGME sy-vline 
WA_MDPA_APO_STR-PSTTR sy-vline 
WA_MDPA_APO_STR-PEDTR sy-vline 
WA_MDPA_APO_STR-UMSKZ sy-vline 
WA_MDPA_APO_STR-KNTTP sy-vline 
WA_MDPA_APO_STR-SOBKZ sy-vline 
WA_MDPA_APO_STR-KZVBR sy-vline 
WA_MDPA_APO_STR-KZBWS sy-vline 
WA_MDPA_APO_STR-KDAUF sy-vline 
WA_MDPA_APO_STR-KDPOS sy-vline 
WA_MDPA_APO_STR-PSPEL sy-vline 
WA_MDPA_APO_STR-SERNR sy-vline 
WA_MDPA_APO_STR-TECHS sy-vline 
WA_MDPA_APO_STR-VERID sy-vline 
WA_MDPA_APO_STR-CUOBJ sy-vline 
WA_MDPA_APO_STR-RSNUM sy-vline 
WA_MDPA_APO_STR-VRPLA sy-vline      INTO ld_text SEPARATED BY SPACE.

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