ABAP Select data from SAP table MCVGIH_CHAR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCVGIH_CHAR
*  INTO TABLE @DATA(IT_MCVGIH_CHAR2).
*--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_MCVGIH_CHAR INDEX 1 INTO DATA(WA_MCVGIH_CHAR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCVGIH_CHAR>-AUFPL = 1.
<MCVGIH_CHAR>-APLZL = 1.
<MCVGIH_CHAR>-VORNR = 1.
<MCVGIH_CHAR>-OBJNR = 1.
<MCVGIH_CHAR>-PM_OBJTY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCVGIH_CHAR-ARBID, sy-vline,
  WA_MCVGIH_CHAR-ARBPL, sy-vline,
  WA_MCVGIH_CHAR-WERKS, sy-vline,
  WA_MCVGIH_CHAR-STEUS, sy-vline,
  WA_MCVGIH_CHAR-ISTRU, sy-vline,
  WA_MCVGIH_CHAR-LARNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCVGIH_CHAR 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_MCVGIH_CHAR 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_MCVGIH_CHAR INTO WA_MCVGIH_CHAR.


*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 NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_MCVGIH_CHAR-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCVGIH_CHAR-VORNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit NUMCV, internal->external for field UVORN
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_MCVGIH_CHAR-UVORN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCVGIH_CHAR-UVORN.
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_MCVGIH_CHAR_STR, 
AUFPL TYPE STRING,
APLZL TYPE STRING,
VORNR TYPE STRING,
OBJNR TYPE STRING,
PM_OBJTY TYPE STRING,
ARBID TYPE STRING,
ARBPL TYPE STRING,
WERKS TYPE STRING,
STEUS TYPE STRING,
ISTRU TYPE STRING,
LARNT TYPE STRING,
RUECK TYPE STRING,
SAKTO TYPE STRING,
MATKL TYPE STRING,
WEMPF TYPE STRING,
ABLAD TYPE STRING,
BANFN TYPE STRING,
SUMNR TYPE STRING,
UVORN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCVGIH_CHAR_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_MCVGIH_CHAR_STR-AUFPL sy-vline 
WA_MCVGIH_CHAR_STR-APLZL sy-vline 
WA_MCVGIH_CHAR_STR-VORNR sy-vline 
WA_MCVGIH_CHAR_STR-OBJNR sy-vline 
WA_MCVGIH_CHAR_STR-PM_OBJTY sy-vline 
WA_MCVGIH_CHAR_STR-ARBID sy-vline 
WA_MCVGIH_CHAR_STR-ARBPL sy-vline 
WA_MCVGIH_CHAR_STR-WERKS sy-vline 
WA_MCVGIH_CHAR_STR-STEUS sy-vline 
WA_MCVGIH_CHAR_STR-ISTRU sy-vline 
WA_MCVGIH_CHAR_STR-LARNT sy-vline 
WA_MCVGIH_CHAR_STR-RUECK sy-vline 
WA_MCVGIH_CHAR_STR-SAKTO sy-vline 
WA_MCVGIH_CHAR_STR-MATKL sy-vline 
WA_MCVGIH_CHAR_STR-WEMPF sy-vline 
WA_MCVGIH_CHAR_STR-ABLAD sy-vline 
WA_MCVGIH_CHAR_STR-BANFN sy-vline 
WA_MCVGIH_CHAR_STR-SUMNR sy-vline 
WA_MCVGIH_CHAR_STR-UVORN sy-vline      INTO ld_text SEPARATED BY SPACE.

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