ABAP Select data from SAP table MPD_ITEM_SCR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MPD_ITEM_SCR
*  INTO TABLE @DATA(IT_MPD_ITEM_SCR2).
*--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_MPD_ITEM_SCR INDEX 1 INTO DATA(WA_MPD_ITEM_SCR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MPD_ITEM_SCR>-MANDT = 1.
<MPD_ITEM_SCR>-PLAN_DATA_ID = 1.
<MPD_ITEM_SCR>-COUNTER = 1.
<MPD_ITEM_SCR>-PSTXT = 1.
<MPD_ITEM_SCR>-IWERK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MPD_ITEM_SCR-WPGRP, sy-vline,
  WA_MPD_ITEM_SCR-AUART, sy-vline,
  WA_MPD_ITEM_SCR-GEWRK, sy-vline,
  WA_MPD_ITEM_SCR-WERGW, sy-vline,
  WA_MPD_ITEM_SCR-GSBER, sy-vline,
  WA_MPD_ITEM_SCR-PRIOK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MPD_ITEM_SCR 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_MPD_ITEM_SCR 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_MPD_ITEM_SCR INTO WA_MPD_ITEM_SCR.


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

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

*Conversion exit ALPHA, internal->external for field PLNAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MPD_ITEM_SCR-PLNAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPD_ITEM_SCR-PLNAL.
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_MPD_ITEM_SCR_STR, 
MANDT TYPE STRING,
PLAN_DATA_ID TYPE STRING,
COUNTER TYPE STRING,
PSTXT TYPE STRING,
IWERK TYPE STRING,
WPGRP TYPE STRING,
AUART TYPE STRING,
GEWRK TYPE STRING,
WERGW TYPE STRING,
GSBER TYPE STRING,
PRIOK TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNAL TYPE STRING,
CYCLESEQIND TYPE STRING,
QMART TYPE STRING,
TASK_DETERMINE TYPE STRING,
VAPLZ TYPE STRING,
APL_BTN TYPE STRING,
LA_BTN TYPE STRING,
PLANT_SHT TYPE STRING,
PLSHT TYPE STRING,
PRIOKX TYPE STRING,
QMART_SHT TYPE STRING,
WKCNTR_SHT TYPE STRING,
WPGRP_SHT TYPE STRING,
DROP_DOWN_HANDLE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MPD_ITEM_SCR_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_MPD_ITEM_SCR_STR-MANDT sy-vline 
WA_MPD_ITEM_SCR_STR-PLAN_DATA_ID sy-vline 
WA_MPD_ITEM_SCR_STR-COUNTER sy-vline 
WA_MPD_ITEM_SCR_STR-PSTXT sy-vline 
WA_MPD_ITEM_SCR_STR-IWERK sy-vline 
WA_MPD_ITEM_SCR_STR-WPGRP sy-vline 
WA_MPD_ITEM_SCR_STR-AUART sy-vline 
WA_MPD_ITEM_SCR_STR-GEWRK sy-vline 
WA_MPD_ITEM_SCR_STR-WERGW sy-vline 
WA_MPD_ITEM_SCR_STR-GSBER sy-vline 
WA_MPD_ITEM_SCR_STR-PRIOK sy-vline 
WA_MPD_ITEM_SCR_STR-KDAUF sy-vline 
WA_MPD_ITEM_SCR_STR-KDPOS sy-vline 
WA_MPD_ITEM_SCR_STR-PLNTY sy-vline 
WA_MPD_ITEM_SCR_STR-PLNNR sy-vline 
WA_MPD_ITEM_SCR_STR-PLNAL sy-vline 
WA_MPD_ITEM_SCR_STR-CYCLESEQIND sy-vline 
WA_MPD_ITEM_SCR_STR-QMART sy-vline 
WA_MPD_ITEM_SCR_STR-TASK_DETERMINE sy-vline 
WA_MPD_ITEM_SCR_STR-VAPLZ sy-vline 
WA_MPD_ITEM_SCR_STR-APL_BTN sy-vline 
WA_MPD_ITEM_SCR_STR-LA_BTN sy-vline 
WA_MPD_ITEM_SCR_STR-PLANT_SHT sy-vline 
WA_MPD_ITEM_SCR_STR-PLSHT sy-vline 
WA_MPD_ITEM_SCR_STR-PRIOKX sy-vline 
WA_MPD_ITEM_SCR_STR-QMART_SHT sy-vline 
WA_MPD_ITEM_SCR_STR-WKCNTR_SHT sy-vline 
WA_MPD_ITEM_SCR_STR-WPGRP_SHT sy-vline 
WA_MPD_ITEM_SCR_STR-DROP_DOWN_HANDLE sy-vline      INTO ld_text SEPARATED BY SPACE.

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