ABAP Select data from SAP table MGV_M_KBLME into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MGV_M_KBLME
*  INTO TABLE @DATA(IT_MGV_M_KBLME2).
*--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_MGV_M_KBLME INDEX 1 INTO DATA(WA_MGV_M_KBLME2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MGV_M_KBLME>-MANDT = 1.
<MGV_M_KBLME>-BLART = 1.
<MGV_M_KBLME>-BLTYP = 1.
<MGV_M_KBLME>-BELNR = 1.
<MGV_M_KBLME>-FDATK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MGV_M_KBLME-KSTAR, sy-vline,
  WA_MGV_M_KBLME-LOEKZ, sy-vline,
  WA_MGV_M_KBLME-MATNR, sy-vline,
  WA_MGV_M_KBLME-LIFNR, sy-vline,
  WA_MGV_M_KBLME-AEDAT, sy-vline,
  WA_MGV_M_KBLME-AENDE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MGV_M_KBLME 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_MGV_M_KBLME 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_MGV_M_KBLME INTO WA_MGV_M_KBLME.


*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_MGV_M_KBLME-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MGV_M_KBLME-BELNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit MATNL, internal->external for field MATNR_EXT
CALL FUNCTION 'CONVERSION_EXIT_MATNL_OUTPUT'
  EXPORTING
    input =                      WA_MGV_M_KBLME-MATNR_EXT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MGV_M_KBLME-MATNR_EXT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATNW, internal->external for field MATNR_VERS
CALL FUNCTION 'CONVERSION_EXIT_MATNW_OUTPUT'
  EXPORTING
    input =                      WA_MGV_M_KBLME-MATNR_VERS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MGV_M_KBLME-MATNR_VERS.
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_MGV_M_KBLME_STR, 
MANDT TYPE STRING,
BLART TYPE STRING,
BLTYP TYPE STRING,
BELNR TYPE STRING,
FDATK TYPE STRING,
KSTAR TYPE STRING,
LOEKZ TYPE STRING,
MATNR TYPE STRING,
LIFNR TYPE STRING,
AEDAT TYPE STRING,
AENDE TYPE STRING,
PTEXT TYPE STRING,
BLPOS TYPE STRING,
MATNR_EXT TYPE STRING,
MATNR_VERS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MGV_M_KBLME_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_MGV_M_KBLME_STR-MANDT sy-vline 
WA_MGV_M_KBLME_STR-BLART sy-vline 
WA_MGV_M_KBLME_STR-BLTYP sy-vline 
WA_MGV_M_KBLME_STR-BELNR sy-vline 
WA_MGV_M_KBLME_STR-FDATK sy-vline 
WA_MGV_M_KBLME_STR-KSTAR sy-vline 
WA_MGV_M_KBLME_STR-LOEKZ sy-vline 
WA_MGV_M_KBLME_STR-MATNR sy-vline 
WA_MGV_M_KBLME_STR-LIFNR sy-vline 
WA_MGV_M_KBLME_STR-AEDAT sy-vline 
WA_MGV_M_KBLME_STR-AENDE sy-vline 
WA_MGV_M_KBLME_STR-PTEXT sy-vline 
WA_MGV_M_KBLME_STR-BLPOS sy-vline 
WA_MGV_M_KBLME_STR-MATNR_EXT sy-vline 
WA_MGV_M_KBLME_STR-MATNR_VERS sy-vline      INTO ld_text SEPARATED BY SPACE.

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