ABAP Select data from SAP table MDIFF_LIPS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDIFF_LIPS
*  INTO TABLE @DATA(IT_MDIFF_LIPS2).
*--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_MDIFF_LIPS INDEX 1 INTO DATA(WA_MDIFF_LIPS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDIFF_LIPS>-VBELN = 1.
<MDIFF_LIPS>-POSNR = 1.
<MDIFF_LIPS>-PSTYV = 1.
<MDIFF_LIPS>-BUDAT = 1.
<MDIFF_LIPS>-BLDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDIFF_LIPS-BWART, sy-vline,
  WA_MDIFF_LIPS-BWART_NEXT, sy-vline,
  WA_MDIFF_LIPS-MATNR, sy-vline,
  WA_MDIFF_LIPS-MAKTX, sy-vline,
  WA_MDIFF_LIPS-CHARG, sy-vline,
  WA_MDIFF_LIPS-WERKS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDIFF_LIPS 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_MDIFF_LIPS 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_MDIFF_LIPS INTO WA_MDIFF_LIPS.


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

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

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

*Conversion exit CUNIT, internal->external for field VRKME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MDIFF_LIPS-VRKME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDIFF_LIPS-VRKME.
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_MDIFF_LIPS_STR, 
VBELN TYPE STRING,
POSNR TYPE STRING,
PSTYV TYPE STRING,
BUDAT TYPE STRING,
BLDAT TYPE STRING,
BWART TYPE STRING,
BWART_NEXT TYPE STRING,
MATNR TYPE STRING,
MAKTX TYPE STRING,
CHARG TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
LFIMG TYPE STRING,
MEINS TYPE STRING,
VRKME TYPE STRING,
GRUND TYPE STRING,
EBUMG TYPE STRING,
VBUMGX TYPE STRING,
COMPL_MARK TYPE STRING,
FZGLS_MARK TYPE STRING,
ETANP_MARK TYPE STRING,
XDELIV_MARK TYPE STRING,
POPUP_MARK TYPE STRING,
NOWAB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDIFF_LIPS_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_MDIFF_LIPS_STR-VBELN sy-vline 
WA_MDIFF_LIPS_STR-POSNR sy-vline 
WA_MDIFF_LIPS_STR-PSTYV sy-vline 
WA_MDIFF_LIPS_STR-BUDAT sy-vline 
WA_MDIFF_LIPS_STR-BLDAT sy-vline 
WA_MDIFF_LIPS_STR-BWART sy-vline 
WA_MDIFF_LIPS_STR-BWART_NEXT sy-vline 
WA_MDIFF_LIPS_STR-MATNR sy-vline 
WA_MDIFF_LIPS_STR-MAKTX sy-vline 
WA_MDIFF_LIPS_STR-CHARG sy-vline 
WA_MDIFF_LIPS_STR-WERKS sy-vline 
WA_MDIFF_LIPS_STR-LGORT sy-vline 
WA_MDIFF_LIPS_STR-LFIMG sy-vline 
WA_MDIFF_LIPS_STR-MEINS sy-vline 
WA_MDIFF_LIPS_STR-VRKME sy-vline 
WA_MDIFF_LIPS_STR-GRUND sy-vline 
WA_MDIFF_LIPS_STR-EBUMG sy-vline 
WA_MDIFF_LIPS_STR-VBUMGX sy-vline 
WA_MDIFF_LIPS_STR-COMPL_MARK sy-vline 
WA_MDIFF_LIPS_STR-FZGLS_MARK sy-vline 
WA_MDIFF_LIPS_STR-ETANP_MARK sy-vline 
WA_MDIFF_LIPS_STR-XDELIV_MARK sy-vline 
WA_MDIFF_LIPS_STR-POPUP_MARK sy-vline 
WA_MDIFF_LIPS_STR-NOWAB sy-vline      INTO ld_text SEPARATED BY SPACE.

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