ABAP Select data from SAP table VIZA01 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP VIZA01 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 VIZA01. 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 VIZA01 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_VIZA01 TYPE STANDARD TABLE OF VIZA01,
      WA_VIZA01 TYPE VIZA01,
      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: <VIZA01> TYPE VIZA01.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_VIZA01.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM VIZA01
  INTO TABLE IT_VIZA01.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VIZA01
*  INTO TABLE @DATA(IT_VIZA012).
*--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_VIZA01 INDEX 1 INTO DATA(WA_VIZA012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_VIZA01 ASSIGNING <VIZA01>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VIZA01>-MANDT = 1.
<VIZA01>-SZAEHLER = 1.
<VIZA01>-BUKRS = 1.
<VIZA01>-WENR = 1.
<VIZA01>-GRNR = 1.

ENDLOOP.

LOOP AT IT_VIZA01 INTO WA_VIZA01.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VIZA01-GENR, sy-vline,
  WA_VIZA01-MENR, sy-vline,
  WA_VIZA01-RAUMNR, sy-vline,
  WA_VIZA01-ABRG, sy-vline,
  WA_VIZA01-DEIN, sy-vline,
  WA_VIZA01-DAUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VIZA01 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_VIZA01 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_VIZA01 INTO WA_VIZA01.


*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 WENR
CALL FUNCTION 'CONVERSION_EXIT_SWENR_OUTPUT'
  EXPORTING
    input =                      WA_VIZA01-WENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIZA01-WENR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SGRNR, internal->external for field GRNR
CALL FUNCTION 'CONVERSION_EXIT_SGRNR_OUTPUT'
  EXPORTING
    input =                      WA_VIZA01-GRNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIZA01-GRNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SGENR, internal->external for field GENR
CALL FUNCTION 'CONVERSION_EXIT_SGENR_OUTPUT'
  EXPORTING
    input =                      WA_VIZA01-GENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIZA01-GENR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SMENR, internal->external for field MENR
CALL FUNCTION 'CONVERSION_EXIT_SMENR_OUTPUT'
  EXPORTING
    input =                      WA_VIZA01-MENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIZA01-MENR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field POINT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VIZA01-POINT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIZA01-POINT.
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_VIZA01_STR, 
MANDT TYPE STRING,
SZAEHLER TYPE STRING,
BUKRS TYPE STRING,
WENR TYPE STRING,
GRNR TYPE STRING,
GENR TYPE STRING,
MENR TYPE STRING,
RAUMNR TYPE STRING,
ABRG TYPE STRING,
DEIN TYPE STRING,
DAUS TYPE STRING,
EXT TYPE STRING,
PARENT TYPE STRING,
VORG TYPE STRING,
XBEM TYPE STRING,
RERF TYPE STRING,
DERF TYPE STRING,
TERF TYPE STRING,
REHER TYPE STRING,
RBEAR TYPE STRING,
DBEAR TYPE STRING,
TBEAR TYPE STRING,
RBHER TYPE STRING,
SRAUM TYPE STRING,
POINT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VIZA01_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_VIZA01_STR-MANDT sy-vline 
WA_VIZA01_STR-SZAEHLER sy-vline 
WA_VIZA01_STR-BUKRS sy-vline 
WA_VIZA01_STR-WENR sy-vline 
WA_VIZA01_STR-GRNR sy-vline 
WA_VIZA01_STR-GENR sy-vline 
WA_VIZA01_STR-MENR sy-vline 
WA_VIZA01_STR-RAUMNR sy-vline 
WA_VIZA01_STR-ABRG sy-vline 
WA_VIZA01_STR-DEIN sy-vline 
WA_VIZA01_STR-DAUS sy-vline 
WA_VIZA01_STR-EXT sy-vline 
WA_VIZA01_STR-PARENT sy-vline 
WA_VIZA01_STR-VORG sy-vline 
WA_VIZA01_STR-XBEM sy-vline 
WA_VIZA01_STR-RERF sy-vline 
WA_VIZA01_STR-DERF sy-vline 
WA_VIZA01_STR-TERF sy-vline 
WA_VIZA01_STR-REHER sy-vline 
WA_VIZA01_STR-RBEAR sy-vline 
WA_VIZA01_STR-DBEAR sy-vline 
WA_VIZA01_STR-TBEAR sy-vline 
WA_VIZA01_STR-RBHER sy-vline 
WA_VIZA01_STR-SRAUM sy-vline 
WA_VIZA01_STR-POINT sy-vline      INTO ld_text SEPARATED BY SPACE.

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