ABAP Select data from SAP table MLXXV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MLXXV
*  INTO TABLE @DATA(IT_MLXXV2).
*--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_MLXXV INDEX 1 INTO DATA(WA_MLXXV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MLXXV>-MANDT = 1.
<MLXXV>-BELNR = 1.
<MLXXV>-KJAHR = 1.
<MLXXV>-POSNR = 1.
<MLXXV>-BDATJ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MLXXV-POPER, sy-vline,
  WA_MLXXV-CURTP, sy-vline,
  WA_MLXXV-VGART, sy-vline,
  WA_MLXXV-UMBEW, sy-vline,
  WA_MLXXV-MATNR, sy-vline,
  WA_MLXXV-BWTAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MLXXV 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_MLXXV 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_MLXXV INTO WA_MLXXV.


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

*Conversion exit GJAHR, internal->external for field KJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MLXXV-KJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MLXXV-KJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field BDATJ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MLXXV-BDATJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MLXXV-BDATJ.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ABPSP, internal->external for field PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_MLXXV-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MLXXV-PSPNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MLXXV-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MLXXV-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_MLXXV_STR, 
MANDT TYPE STRING,
BELNR TYPE STRING,
KJAHR TYPE STRING,
POSNR TYPE STRING,
BDATJ TYPE STRING,
POPER TYPE STRING,
CURTP TYPE STRING,
VGART TYPE STRING,
UMBEW TYPE STRING,
MATNR TYPE STRING,
BWTAR TYPE STRING,
BWKEY TYPE STRING,
VBELN TYPE STRING,
VBELP TYPE STRING,
PSPNR TYPE STRING,
LIFNR TYPE STRING,
KALNR TYPE STRING,
LBKUM TYPE STRING,
MEINS TYPE STRING,
PSART TYPE STRING,
SALK3 TYPE STRING,
WAERS TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
USNAM TYPE STRING,
STORNO TYPE STRING,
MLAST TYPE STRING,
BUDAT TYPE STRING,
STATUS TYPE STRING,
XABRERR TYPE STRING,
SOBKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MLXXV_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_MLXXV_STR-MANDT sy-vline 
WA_MLXXV_STR-BELNR sy-vline 
WA_MLXXV_STR-KJAHR sy-vline 
WA_MLXXV_STR-POSNR sy-vline 
WA_MLXXV_STR-BDATJ sy-vline 
WA_MLXXV_STR-POPER sy-vline 
WA_MLXXV_STR-CURTP sy-vline 
WA_MLXXV_STR-VGART sy-vline 
WA_MLXXV_STR-UMBEW sy-vline 
WA_MLXXV_STR-MATNR sy-vline 
WA_MLXXV_STR-BWTAR sy-vline 
WA_MLXXV_STR-BWKEY sy-vline 
WA_MLXXV_STR-VBELN sy-vline 
WA_MLXXV_STR-VBELP sy-vline 
WA_MLXXV_STR-PSPNR sy-vline 
WA_MLXXV_STR-LIFNR sy-vline 
WA_MLXXV_STR-KALNR sy-vline 
WA_MLXXV_STR-LBKUM sy-vline 
WA_MLXXV_STR-MEINS sy-vline 
WA_MLXXV_STR-PSART sy-vline 
WA_MLXXV_STR-SALK3 sy-vline 
WA_MLXXV_STR-WAERS sy-vline 
WA_MLXXV_STR-CPUDT sy-vline 
WA_MLXXV_STR-CPUTM sy-vline 
WA_MLXXV_STR-USNAM sy-vline 
WA_MLXXV_STR-STORNO sy-vline 
WA_MLXXV_STR-MLAST sy-vline 
WA_MLXXV_STR-BUDAT sy-vline 
WA_MLXXV_STR-STATUS sy-vline 
WA_MLXXV_STR-XABRERR sy-vline 
WA_MLXXV_STR-SOBKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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