ABAP Select data from SAP table MT08Y into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP MT08Y 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 MT08Y. 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 MT08Y 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_MT08Y TYPE STANDARD TABLE OF MT08Y,
      WA_MT08Y TYPE MT08Y,
      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: <MT08Y> TYPE MT08Y.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MT08Y.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MT08Y
  INTO TABLE IT_MT08Y.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MT08Y
*  INTO TABLE @DATA(IT_MT08Y2).
*--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_MT08Y INDEX 1 INTO DATA(WA_MT08Y2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MT08Y ASSIGNING <MT08Y>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MT08Y>-MAKTX = 1.
<MT08Y>-MTART = 1.
<MT08Y>-MEINS = 1.
<MT08Y>-PEINH = 1.
<MT08Y>-VMPEI = 1.

ENDLOOP.

LOOP AT IT_MT08Y INTO WA_MT08Y.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MT08Y-VJPEI, sy-vline,
  WA_MT08Y-LBKUM, sy-vline,
  WA_MT08Y-SALK3, sy-vline,
  WA_MT08Y-VJKUM, sy-vline,
  WA_MT08Y-VJSAL, sy-vline,
  WA_MT08Y-VVJLB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MT08Y 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_MT08Y 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_MT08Y INTO WA_MT08Y.


*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 CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MT08Y-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MT08Y-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_MT08Y_STR, 
MAKTX TYPE STRING,
MTART TYPE STRING,
MEINS TYPE STRING,
PEINH TYPE STRING,
VMPEI TYPE STRING,
VJPEI TYPE STRING,
LBKUM TYPE STRING,
SALK3 TYPE STRING,
VJKUM TYPE STRING,
VJSAL TYPE STRING,
VVJLB TYPE STRING,
VVJSL TYPE STRING,
VMKUM TYPE STRING,
VMSAL TYPE STRING,
VVMLB TYPE STRING,
VVSAL TYPE STRING,
BWPRS TYPE STRING,
BWPRH TYPE STRING,
VJBWS TYPE STRING,
VJBWH TYPE STRING,
BKLAS TYPE STRING,
VMBKL TYPE STRING,
VJBKL TYPE STRING,
BWPH1 TYPE STRING,
BWPS1 TYPE STRING,
VMVPR TYPE STRING,
VMVER TYPE STRING,
VMSTP TYPE STRING,
VJVPR TYPE STRING,
VJVER TYPE STRING,
VJSTP TYPE STRING,
VPRSV TYPE STRING,
VERPR TYPE STRING,
STPRS TYPE STRING,
WERTU TYPE STRING,
BWPEI TYPE STRING,
ABWKZ TYPE STRING,
BWTTY TYPE STRING,
ZPLP1 TYPE STRING,
ZPLD1 TYPE STRING,
ZPLP2 TYPE STRING,
ZPLD2 TYPE STRING,
ZPLP3 TYPE STRING,
ZPLD3 TYPE STRING,
MLMAA TYPE STRING,
MLAST TYPE STRING,
KALN1 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MT08Y_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_MT08Y_STR-MAKTX sy-vline 
WA_MT08Y_STR-MTART sy-vline 
WA_MT08Y_STR-MEINS sy-vline 
WA_MT08Y_STR-PEINH sy-vline 
WA_MT08Y_STR-VMPEI sy-vline 
WA_MT08Y_STR-VJPEI sy-vline 
WA_MT08Y_STR-LBKUM sy-vline 
WA_MT08Y_STR-SALK3 sy-vline 
WA_MT08Y_STR-VJKUM sy-vline 
WA_MT08Y_STR-VJSAL sy-vline 
WA_MT08Y_STR-VVJLB sy-vline 
WA_MT08Y_STR-VVJSL sy-vline 
WA_MT08Y_STR-VMKUM sy-vline 
WA_MT08Y_STR-VMSAL sy-vline 
WA_MT08Y_STR-VVMLB sy-vline 
WA_MT08Y_STR-VVSAL sy-vline 
WA_MT08Y_STR-BWPRS sy-vline 
WA_MT08Y_STR-BWPRH sy-vline 
WA_MT08Y_STR-VJBWS sy-vline 
WA_MT08Y_STR-VJBWH sy-vline 
WA_MT08Y_STR-BKLAS sy-vline 
WA_MT08Y_STR-VMBKL sy-vline 
WA_MT08Y_STR-VJBKL sy-vline 
WA_MT08Y_STR-BWPH1 sy-vline 
WA_MT08Y_STR-BWPS1 sy-vline 
WA_MT08Y_STR-VMVPR sy-vline 
WA_MT08Y_STR-VMVER sy-vline 
WA_MT08Y_STR-VMSTP sy-vline 
WA_MT08Y_STR-VJVPR sy-vline 
WA_MT08Y_STR-VJVER sy-vline 
WA_MT08Y_STR-VJSTP sy-vline 
WA_MT08Y_STR-VPRSV sy-vline 
WA_MT08Y_STR-VERPR sy-vline 
WA_MT08Y_STR-STPRS sy-vline 
WA_MT08Y_STR-WERTU sy-vline 
WA_MT08Y_STR-BWPEI sy-vline 
WA_MT08Y_STR-ABWKZ sy-vline 
WA_MT08Y_STR-BWTTY sy-vline 
WA_MT08Y_STR-ZPLP1 sy-vline 
WA_MT08Y_STR-ZPLD1 sy-vline 
WA_MT08Y_STR-ZPLP2 sy-vline 
WA_MT08Y_STR-ZPLD2 sy-vline 
WA_MT08Y_STR-ZPLP3 sy-vline 
WA_MT08Y_STR-ZPLD3 sy-vline 
WA_MT08Y_STR-MLMAA sy-vline 
WA_MT08Y_STR-MLAST sy-vline 
WA_MT08Y_STR-KALN1 sy-vline      INTO ld_text SEPARATED BY SPACE.

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