ABAP Select data from SAP table VIGWMERAZO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VIGWMERAZO
*  INTO TABLE @DATA(IT_VIGWMERAZO2).
*--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_VIGWMERAZO INDEX 1 INTO DATA(WA_VIGWMERAZO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VIGWMERAZO>-SRAUMEXT = 1.
<VIGWMERAZO>-XRBEZ = 1.
<VIGWMERAZO>-FLID = 1.
<VIGWMERAZO>-FLLBEZ = 1.
<VIGWMERAZO>-INTRENO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VIGWMERAZO-INTRENO2, sy-vline,
  WA_VIGWMERAZO-GFLNMZ, sy-vline,
  WA_VIGWMERAZO-GNMZEH, sy-vline,
  WA_VIGWMERAZO-GFLFAK, sy-vline,
  WA_VIGWMERAZO-GFAKEH, sy-vline,
  WA_VIGWMERAZO-GFLKAP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VIGWMERAZO 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_VIGWMERAZO 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_VIGWMERAZO INTO WA_VIGWMERAZO.


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

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

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

*Conversion exit SGRNR, internal->external for field SGRNR
CALL FUNCTION 'CONVERSION_EXIT_SGRNR_OUTPUT'
  EXPORTING
    input =                      WA_VIGWMERAZO-SGRNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIGWMERAZO-SGRNR.
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_VIGWMERAZO_STR, 
SRAUMEXT TYPE STRING,
XRBEZ TYPE STRING,
FLID TYPE STRING,
FLLBEZ TYPE STRING,
INTRENO TYPE STRING,
INTRENO2 TYPE STRING,
GFLNMZ TYPE STRING,
GNMZEH TYPE STRING,
GFLFAK TYPE STRING,
GFAKEH TYPE STRING,
GFLKAP TYPE STRING,
GKAPEH TYPE STRING,
DGUELAB TYPE STRING,
DGUELBIS TYPE STRING,
SGENR TYPE STRING,
A_FLID TYPE STRING,
SGRNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VIGWMERAZO_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_VIGWMERAZO_STR-SRAUMEXT sy-vline 
WA_VIGWMERAZO_STR-XRBEZ sy-vline 
WA_VIGWMERAZO_STR-FLID sy-vline 
WA_VIGWMERAZO_STR-FLLBEZ sy-vline 
WA_VIGWMERAZO_STR-INTRENO sy-vline 
WA_VIGWMERAZO_STR-INTRENO2 sy-vline 
WA_VIGWMERAZO_STR-GFLNMZ sy-vline 
WA_VIGWMERAZO_STR-GNMZEH sy-vline 
WA_VIGWMERAZO_STR-GFLFAK sy-vline 
WA_VIGWMERAZO_STR-GFAKEH sy-vline 
WA_VIGWMERAZO_STR-GFLKAP sy-vline 
WA_VIGWMERAZO_STR-GKAPEH sy-vline 
WA_VIGWMERAZO_STR-DGUELAB sy-vline 
WA_VIGWMERAZO_STR-DGUELBIS sy-vline 
WA_VIGWMERAZO_STR-SGENR sy-vline 
WA_VIGWMERAZO_STR-A_FLID sy-vline 
WA_VIGWMERAZO_STR-SGRNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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