ABAP Select data from SAP table VIGWSMEZUDIA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VIGWSMEZUDIA
*  INTO TABLE @DATA(IT_VIGWSMEZUDIA2).
*--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_VIGWSMEZUDIA INDEX 1 INTO DATA(WA_VIGWSMEZUDIA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VIGWSMEZUDIA>-DGUELAB = 1.
<VIGWSMEZUDIA>-DGUELBIS = 1.
<VIGWSMEZUDIA>-BUKRS = 1.
<VIGWSMEZUDIA>-SWENR = 1.
<VIGWSMEZUDIA>-SGRNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VIGWSMEZUDIA-SGENR, sy-vline,
  WA_VIGWSMEZUDIA-SRAUMEXT, sy-vline,
  WA_VIGWSMEZUDIA-FLID, sy-vline,
  WA_VIGWSMEZUDIA-SMENR, sy-vline,
  WA_VIGWSMEZUDIA-XMETXT, sy-vline,
  WA_VIGWSMEZUDIA-MEINTRENO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VIGWSMEZUDIA 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_VIGWSMEZUDIA 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_VIGWSMEZUDIA INTO WA_VIGWSMEZUDIA.


*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_VIGWSMEZUDIA-SWENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIGWSMEZUDIA-SWENR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

*Conversion exit SGRNR, internal->external for field SGRNR_US
CALL FUNCTION 'CONVERSION_EXIT_SGRNR_OUTPUT'
  EXPORTING
    input =                      WA_VIGWSMEZUDIA-SGRNR_US
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIGWSMEZUDIA-SGRNR_US.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SGENR, internal->external for field SGENR_US
CALL FUNCTION 'CONVERSION_EXIT_SGENR_OUTPUT'
  EXPORTING
    input =                      WA_VIGWSMEZUDIA-SGENR_US
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIGWSMEZUDIA-SGENR_US.
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_VIGWSMEZUDIA_STR, 
DGUELAB TYPE STRING,
DGUELBIS TYPE STRING,
BUKRS TYPE STRING,
SWENR TYPE STRING,
SGRNR TYPE STRING,
SGENR TYPE STRING,
SRAUMEXT TYPE STRING,
FLID TYPE STRING,
SMENR TYPE STRING,
XMETXT TYPE STRING,
MEINTRENO TYPE STRING,
SNUNR TYPE STRING,
XNUKBEZ TYPE STRING,
XNUMBEZ TYPE STRING,
ZUOMOD TYPE STRING,
GFLKAP TYPE STRING,
GKAPEH TYPE STRING,
GFLNMZ TYPE STRING,
GNMZEH TYPE STRING,
FLG_LME TYPE STRING,
MAXNMZ TYPE STRING,
SPCINTRENO TYPE STRING,
SGRNR_US TYPE STRING,
SGENR_US TYPE STRING,
OBJTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VIGWSMEZUDIA_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_VIGWSMEZUDIA_STR-DGUELAB sy-vline 
WA_VIGWSMEZUDIA_STR-DGUELBIS sy-vline 
WA_VIGWSMEZUDIA_STR-BUKRS sy-vline 
WA_VIGWSMEZUDIA_STR-SWENR sy-vline 
WA_VIGWSMEZUDIA_STR-SGRNR sy-vline 
WA_VIGWSMEZUDIA_STR-SGENR sy-vline 
WA_VIGWSMEZUDIA_STR-SRAUMEXT sy-vline 
WA_VIGWSMEZUDIA_STR-FLID sy-vline 
WA_VIGWSMEZUDIA_STR-SMENR sy-vline 
WA_VIGWSMEZUDIA_STR-XMETXT sy-vline 
WA_VIGWSMEZUDIA_STR-MEINTRENO sy-vline 
WA_VIGWSMEZUDIA_STR-SNUNR sy-vline 
WA_VIGWSMEZUDIA_STR-XNUKBEZ sy-vline 
WA_VIGWSMEZUDIA_STR-XNUMBEZ sy-vline 
WA_VIGWSMEZUDIA_STR-ZUOMOD sy-vline 
WA_VIGWSMEZUDIA_STR-GFLKAP sy-vline 
WA_VIGWSMEZUDIA_STR-GKAPEH sy-vline 
WA_VIGWSMEZUDIA_STR-GFLNMZ sy-vline 
WA_VIGWSMEZUDIA_STR-GNMZEH sy-vline 
WA_VIGWSMEZUDIA_STR-FLG_LME sy-vline 
WA_VIGWSMEZUDIA_STR-MAXNMZ sy-vline 
WA_VIGWSMEZUDIA_STR-SPCINTRENO sy-vline 
WA_VIGWSMEZUDIA_STR-SGRNR_US sy-vline 
WA_VIGWSMEZUDIA_STR-SGENR_US sy-vline 
WA_VIGWSMEZUDIA_STR-OBJTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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