ABAP Select data from SAP table MGV_CKMLMV001 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MGV_CKMLMV001 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_CKMLMV001. 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_CKMLMV001 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_CKMLMV001 TYPE STANDARD TABLE OF MGV_CKMLMV001,
      WA_MGV_CKMLMV001 TYPE MGV_CKMLMV001,
      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_CKMLMV001> TYPE MGV_CKMLMV001.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MGV_CKMLMV001.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MGV_CKMLMV001
  INTO TABLE IT_MGV_CKMLMV001.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MGV_CKMLMV001
*  INTO TABLE @DATA(IT_MGV_CKMLMV0012).
*--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_CKMLMV001 INDEX 1 INTO DATA(WA_MGV_CKMLMV0012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MGV_CKMLMV001 ASSIGNING <MGV_CKMLMV001>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MGV_CKMLMV001>-MANDT = 1.
<MGV_CKMLMV001>-KALNR = 1.
<MGV_CKMLMV001>-OTYP = 1.
<MGV_CKMLMV001>-BWKEY = 1.
<MGV_CKMLMV001>-WERKS = 1.

ENDLOOP.

LOOP AT IT_MGV_CKMLMV001 INTO WA_MGV_CKMLMV001.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MGV_CKMLMV001-MATNR, sy-vline,
  WA_MGV_CKMLMV001-BWTAR, sy-vline,
  WA_MGV_CKMLMV001-SOBKZ, sy-vline,
  WA_MGV_CKMLMV001-KALNR_MAT, sy-vline,
  WA_MGV_CKMLMV001-BTYP, sy-vline,
  WA_MGV_CKMLMV001-FLG_PROCEQUAL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MGV_CKMLMV001 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_CKMLMV001 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_CKMLMV001 INTO WA_MGV_CKMLMV001.


*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_MGV_CKMLMV001-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MGV_CKMLMV001-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field PMATN_ND
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MGV_CKMLMV001-PMATN_ND
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MGV_CKMLMV001-PMATN_ND.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field STLAL_ND
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MGV_CKMLMV001-STLAL_ND
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MGV_CKMLMV001-STLAL_ND.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PLNNR_ND
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MGV_CKMLMV001-PLNNR_ND
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MGV_CKMLMV001-PLNNR_ND.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PLNAL_ND
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MGV_CKMLMV001-PLNAL_ND
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MGV_CKMLMV001-PLNAL_ND.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR_ND
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MGV_CKMLMV001-LIFNR_ND
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MGV_CKMLMV001-LIFNR_ND.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field UMLMA_ND
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MGV_CKMLMV001-UMLMA_ND
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MGV_CKMLMV001-UMLMA_ND.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KDAUF_ND
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MGV_CKMLMV001-KDAUF_ND
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MGV_CKMLMV001-KDAUF_ND.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNDE_ND
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MGV_CKMLMV001-KUNDE_ND
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MGV_CKMLMV001-KUNDE_ND.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PSPNR_ND
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_MGV_CKMLMV001-PSPNR_ND
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MGV_CKMLMV001-PSPNR_ND.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field STLAL_PC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MGV_CKMLMV001-STLAL_PC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MGV_CKMLMV001-STLAL_PC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS_PC
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MGV_CKMLMV001-MEINS_PC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MGV_CKMLMV001-MEINS_PC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATNL, internal->external for field MATNR_EXT
CALL FUNCTION 'CONVERSION_EXIT_MATNL_OUTPUT'
  EXPORTING
    input =                      WA_MGV_CKMLMV001-MATNR_EXT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MGV_CKMLMV001-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_CKMLMV001-MATNR_VERS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MGV_CKMLMV001-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_CKMLMV001_STR, 
MANDT TYPE STRING,
KALNR TYPE STRING,
OTYP TYPE STRING,
BWKEY TYPE STRING,
WERKS TYPE STRING,
MATNR TYPE STRING,
BWTAR TYPE STRING,
SOBKZ TYPE STRING,
KALNR_MAT TYPE STRING,
BTYP TYPE STRING,
FLG_PROCEQUAL TYPE STRING,
FLG_PLANOBJ TYPE STRING,
PROC_KALNR TYPE STRING,
MAIN_PROCESS TYPE STRING,
SORT_NAME TYPE STRING,
NRULE TYPE STRING,
LOEKZ TYPE STRING,
PRWRK_ND TYPE STRING,
PLWRK_ND TYPE STRING,
PMATN_ND TYPE STRING,
VERID_ND TYPE STRING,
STLAN_ND TYPE STRING,
STLAL_ND TYPE STRING,
PLNTY_ND TYPE STRING,
PLNNR_ND TYPE STRING,
PLNAL_ND TYPE STRING,
EKORG_ND TYPE STRING,
LIFNR_ND TYPE STRING,
UMLWK_ND TYPE STRING,
UMLMA_ND TYPE STRING,
KDAUF_ND TYPE STRING,
KDPOS_ND TYPE STRING,
KUNDE_ND TYPE STRING,
PSPNR_ND TYPE STRING,
SPEZ_NAME_ND TYPE STRING,
STLAN_PC TYPE STRING,
STLAL_PC TYPE STRING,
LOSGR_PC TYPE STRING,
MEINS_PC TYPE STRING,
CSPLIT_PC TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
MATNR_EXT TYPE STRING,
MATNR_VERS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MGV_CKMLMV001_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_CKMLMV001_STR-MANDT sy-vline 
WA_MGV_CKMLMV001_STR-KALNR sy-vline 
WA_MGV_CKMLMV001_STR-OTYP sy-vline 
WA_MGV_CKMLMV001_STR-BWKEY sy-vline 
WA_MGV_CKMLMV001_STR-WERKS sy-vline 
WA_MGV_CKMLMV001_STR-MATNR sy-vline 
WA_MGV_CKMLMV001_STR-BWTAR sy-vline 
WA_MGV_CKMLMV001_STR-SOBKZ sy-vline 
WA_MGV_CKMLMV001_STR-KALNR_MAT sy-vline 
WA_MGV_CKMLMV001_STR-BTYP sy-vline 
WA_MGV_CKMLMV001_STR-FLG_PROCEQUAL sy-vline 
WA_MGV_CKMLMV001_STR-FLG_PLANOBJ sy-vline 
WA_MGV_CKMLMV001_STR-PROC_KALNR sy-vline 
WA_MGV_CKMLMV001_STR-MAIN_PROCESS sy-vline 
WA_MGV_CKMLMV001_STR-SORT_NAME sy-vline 
WA_MGV_CKMLMV001_STR-NRULE sy-vline 
WA_MGV_CKMLMV001_STR-LOEKZ sy-vline 
WA_MGV_CKMLMV001_STR-PRWRK_ND sy-vline 
WA_MGV_CKMLMV001_STR-PLWRK_ND sy-vline 
WA_MGV_CKMLMV001_STR-PMATN_ND sy-vline 
WA_MGV_CKMLMV001_STR-VERID_ND sy-vline 
WA_MGV_CKMLMV001_STR-STLAN_ND sy-vline 
WA_MGV_CKMLMV001_STR-STLAL_ND sy-vline 
WA_MGV_CKMLMV001_STR-PLNTY_ND sy-vline 
WA_MGV_CKMLMV001_STR-PLNNR_ND sy-vline 
WA_MGV_CKMLMV001_STR-PLNAL_ND sy-vline 
WA_MGV_CKMLMV001_STR-EKORG_ND sy-vline 
WA_MGV_CKMLMV001_STR-LIFNR_ND sy-vline 
WA_MGV_CKMLMV001_STR-UMLWK_ND sy-vline 
WA_MGV_CKMLMV001_STR-UMLMA_ND sy-vline 
WA_MGV_CKMLMV001_STR-KDAUF_ND sy-vline 
WA_MGV_CKMLMV001_STR-KDPOS_ND sy-vline 
WA_MGV_CKMLMV001_STR-KUNDE_ND sy-vline 
WA_MGV_CKMLMV001_STR-PSPNR_ND sy-vline 
WA_MGV_CKMLMV001_STR-SPEZ_NAME_ND sy-vline 
WA_MGV_CKMLMV001_STR-STLAN_PC sy-vline 
WA_MGV_CKMLMV001_STR-STLAL_PC sy-vline 
WA_MGV_CKMLMV001_STR-LOSGR_PC sy-vline 
WA_MGV_CKMLMV001_STR-MEINS_PC sy-vline 
WA_MGV_CKMLMV001_STR-CSPLIT_PC sy-vline 
WA_MGV_CKMLMV001_STR-ERNAM sy-vline 
WA_MGV_CKMLMV001_STR-ERDAT sy-vline 
WA_MGV_CKMLMV001_STR-MATNR_EXT sy-vline 
WA_MGV_CKMLMV001_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.