ABAP Select data from SAP table SDM_MRP_ELEMENT_COMPARE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SDM_MRP_ELEMENT_COMPARE
*  INTO TABLE @DATA(IT_SDM_MRP_ELEMENT_COMPARE2).
*--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_SDM_MRP_ELEMENT_COMPARE INDEX 1 INTO DATA(WA_SDM_MRP_ELEMENT_COMPARE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SDM_MRP_ELEMENT_COMPARE>-DLADD = 1.
<SDM_MRP_ELEMENT_COMPARE>-WERKS = 1.
<SDM_MRP_ELEMENT_COMPARE>-MATNR = 1.
<SDM_MRP_ELEMENT_COMPARE>-BERID = 1.
<SDM_MRP_ELEMENT_COMPARE>-PLAAB = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SDM_MRP_ELEMENT_COMPARE-PLANR, sy-vline,
  WA_SDM_MRP_ELEMENT_COMPARE-DELKZ, sy-vline,
  WA_SDM_MRP_ELEMENT_COMPARE-DELNR, sy-vline,
  WA_SDM_MRP_ELEMENT_COMPARE-DELPS, sy-vline,
  WA_SDM_MRP_ELEMENT_COMPARE-DELET, sy-vline,
  WA_SDM_MRP_ELEMENT_COMPARE-DAT00, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SDM_MRP_ELEMENT_COMPARE 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_SDM_MRP_ELEMENT_COMPARE 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_SDM_MRP_ELEMENT_COMPARE INTO WA_SDM_MRP_ELEMENT_COMPARE.


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

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

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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_SDM_MRP_ELEMENT_COMPARE-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SDM_MRP_ELEMENT_COMPARE-MEINS.
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_SDM_MRP_ELEMENT_COMPARE_STR, 
DLADD TYPE STRING,
WERKS TYPE STRING,
MATNR TYPE STRING,
BERID TYPE STRING,
PLAAB TYPE STRING,
PLANR TYPE STRING,
DELKZ TYPE STRING,
DELNR TYPE STRING,
DELPS TYPE STRING,
DELET TYPE STRING,
DAT00 TYPE STRING,
DAT01 TYPE STRING,
DAT02 TYPE STRING,
MNG01 TYPE STRING,
MNG02 TYPE STRING,
SORT1 TYPE STRING,
SORT2 TYPE STRING,
FIX01 TYPE STRING,
VRFKZ TYPE STRING,
LIFNR TYPE STRING,
KUNNR TYPE STRING,
WRK02 TYPE STRING,
VERID TYPE STRING,
MDFST TYPE STRING,
DELVR TYPE STRING,
MEINS TYPE STRING,
DOSSC TYPE STRING,
DOSDC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SDM_MRP_ELEMENT_COMPARE_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_SDM_MRP_ELEMENT_COMPARE_STR-DLADD sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-WERKS sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-MATNR sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-BERID sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-PLAAB sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-PLANR sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-DELKZ sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-DELNR sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-DELPS sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-DELET sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-DAT00 sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-DAT01 sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-DAT02 sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-MNG01 sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-MNG02 sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-SORT1 sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-SORT2 sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-FIX01 sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-VRFKZ sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-LIFNR sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-KUNNR sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-WRK02 sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-VERID sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-MDFST sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-DELVR sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-MEINS sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-DOSSC sy-vline 
WA_SDM_MRP_ELEMENT_COMPARE_STR-DOSDC sy-vline      INTO ld_text SEPARATED BY SPACE.

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