ABAP Select data from SAP table MDRP_POCO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDRP_POCO
*  INTO TABLE @DATA(IT_MDRP_POCO2).
*--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_MDRP_POCO INDEX 1 INTO DATA(WA_MDRP_POCO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDRP_POCO>-MANDT = 1.
<MDRP_POCO>-NODE_FROM = 1.
<MDRP_POCO>-NODE_TO = 1.
<MDRP_POCO>-MATNR = 1.
<MDRP_POCO>-ELFDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDRP_POCO-VRSIO, sy-vline,
  WA_MDRP_POCO-T_TYPE, sy-vline,
  WA_MDRP_POCO-PSHIP, sy-vline,
  WA_MDRP_POCO-LLFDAT, sy-vline,
  WA_MDRP_POCO-EREDAT, sy-vline,
  WA_MDRP_POCO-LREDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDRP_POCO 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_MDRP_POCO 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_MDRP_POCO INTO WA_MDRP_POCO.


*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_MDRP_POCO-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDRP_POCO-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MDRP_POCO-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDRP_POCO-LIFNR.
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_MDRP_POCO_STR, 
MANDT TYPE STRING,
NODE_FROM TYPE STRING,
NODE_TO TYPE STRING,
MATNR TYPE STRING,
ELFDAT TYPE STRING,
VRSIO TYPE STRING,
T_TYPE TYPE STRING,
PSHIP TYPE STRING,
LLFDAT TYPE STRING,
EREDAT TYPE STRING,
LREDAT TYPE STRING,
PLIFZ TYPE STRING,
MEINS TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
WERKS_F TYPE STRING,
WERKS_T TYPE STRING,
KUNNR TYPE STRING,
LIFNR TYPE STRING,
DOCNUM TYPE STRING,
DOCPOS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDRP_POCO_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_MDRP_POCO_STR-MANDT sy-vline 
WA_MDRP_POCO_STR-NODE_FROM sy-vline 
WA_MDRP_POCO_STR-NODE_TO sy-vline 
WA_MDRP_POCO_STR-MATNR sy-vline 
WA_MDRP_POCO_STR-ELFDAT sy-vline 
WA_MDRP_POCO_STR-VRSIO sy-vline 
WA_MDRP_POCO_STR-T_TYPE sy-vline 
WA_MDRP_POCO_STR-PSHIP sy-vline 
WA_MDRP_POCO_STR-LLFDAT sy-vline 
WA_MDRP_POCO_STR-EREDAT sy-vline 
WA_MDRP_POCO_STR-LREDAT sy-vline 
WA_MDRP_POCO_STR-PLIFZ sy-vline 
WA_MDRP_POCO_STR-MEINS sy-vline 
WA_MDRP_POCO_STR-EKORG sy-vline 
WA_MDRP_POCO_STR-EKGRP sy-vline 
WA_MDRP_POCO_STR-VKORG sy-vline 
WA_MDRP_POCO_STR-VTWEG sy-vline 
WA_MDRP_POCO_STR-SPART sy-vline 
WA_MDRP_POCO_STR-WERKS_F sy-vline 
WA_MDRP_POCO_STR-WERKS_T sy-vline 
WA_MDRP_POCO_STR-KUNNR sy-vline 
WA_MDRP_POCO_STR-LIFNR sy-vline 
WA_MDRP_POCO_STR-DOCNUM sy-vline 
WA_MDRP_POCO_STR-DOCPOS sy-vline      INTO ld_text SEPARATED BY SPACE.

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