ABAP Select data from SAP table V_MCGEOR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_MCGEOR
*  INTO TABLE @DATA(IT_V_MCGEOR2).
*--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_V_MCGEOR INDEX 1 INTO DATA(WA_V_MCGEOR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_MCGEOR>-MANDT = 1.
<V_MCGEOR>-FOR_OBJNR = 1.
<V_MCGEOR>-DATGAB = 1.
<V_MCGEOR>-RE_OBJNR = 1.
<V_MCGEOR>-DATBIS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_MCGEOR-BUKRS, sy-vline,
  WA_V_MCGEOR-SWENR, sy-vline,
  WA_V_MCGEOR-SGENR, sy-vline,
  WA_V_MCGEOR-XGETXT, sy-vline,
  WA_V_MCGEOR-AUFNR, sy-vline,
  WA_V_MCGEOR-AUART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_MCGEOR 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_V_MCGEOR 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_V_MCGEOR INTO WA_V_MCGEOR.


*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 SWENR, internal->external for field SWENR
CALL FUNCTION 'CONVERSION_EXIT_SWENR_OUTPUT'
  EXPORTING
    input =                      WA_V_MCGEOR-SWENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_MCGEOR-SWENR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SGENR, internal->external for field SGENR
CALL FUNCTION 'CONVERSION_EXIT_SGENR_OUTPUT'
  EXPORTING
    input =                      WA_V_MCGEOR-SGENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_MCGEOR-SGENR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_MCGEOR-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_MCGEOR-AUFNR.
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_V_MCGEOR_STR, 
MANDT TYPE STRING,
FOR_OBJNR TYPE STRING,
DATGAB TYPE STRING,
RE_OBJNR TYPE STRING,
DATBIS TYPE STRING,
BUKRS TYPE STRING,
SWENR TYPE STRING,
SGENR TYPE STRING,
XGETXT TYPE STRING,
AUFNR TYPE STRING,
AUART TYPE STRING,
AUTYP TYPE STRING,
KTEXT TYPE STRING,
OBJNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_MCGEOR_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_V_MCGEOR_STR-MANDT sy-vline 
WA_V_MCGEOR_STR-FOR_OBJNR sy-vline 
WA_V_MCGEOR_STR-DATGAB sy-vline 
WA_V_MCGEOR_STR-RE_OBJNR sy-vline 
WA_V_MCGEOR_STR-DATBIS sy-vline 
WA_V_MCGEOR_STR-BUKRS sy-vline 
WA_V_MCGEOR_STR-SWENR sy-vline 
WA_V_MCGEOR_STR-SGENR sy-vline 
WA_V_MCGEOR_STR-XGETXT sy-vline 
WA_V_MCGEOR_STR-AUFNR sy-vline 
WA_V_MCGEOR_STR-AUART sy-vline 
WA_V_MCGEOR_STR-AUTYP sy-vline 
WA_V_MCGEOR_STR-KTEXT sy-vline 
WA_V_MCGEOR_STR-OBJNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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