ABAP Select data from SAP table V_BUAVCTOLASS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_BUAVCTOLASS 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_BUAVCTOLASS. 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_BUAVCTOLASS 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_BUAVCTOLASS TYPE STANDARD TABLE OF V_BUAVCTOLASS,
      WA_V_BUAVCTOLASS TYPE V_BUAVCTOLASS,
      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_BUAVCTOLASS> TYPE V_BUAVCTOLASS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_BUAVCTOLASS
*  INTO TABLE @DATA(IT_V_BUAVCTOLASS2).
*--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_BUAVCTOLASS INDEX 1 INTO DATA(WA_V_BUAVCTOLASS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_BUAVCTOLASS>-CLIENT = 1.
<V_BUAVCTOLASS>-APPLIC = 1.
<V_BUAVCTOLASS>-TOLPROF = 1.
<V_BUAVCTOLASS>-CEILTYPE = 1.
<V_BUAVCTOLASS>-ACTIVGRP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_BUAVCTOLASS-CHECK_ORDER, sy-vline,
  WA_V_BUAVCTOLASS-TOLPROFTEXT, sy-vline,
  WA_V_BUAVCTOLASS-ACTIVGRPTEXT, sy-vline,
  WA_V_BUAVCTOLASS-RELLIMIT, sy-vline,
  WA_V_BUAVCTOLASS-ABSVAR, sy-vline,
  WA_V_BUAVCTOLASS-CURRENCY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_BUAVCTOLASS 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_BUAVCTOLASS 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_BUAVCTOLASS INTO WA_V_BUAVCTOLASS.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_V_BUAVCTOLASS_STR, 
CLIENT TYPE STRING,
APPLIC TYPE STRING,
TOLPROF TYPE STRING,
CEILTYPE TYPE STRING,
ACTIVGRP TYPE STRING,
CHECK_ORDER TYPE STRING,
TOLPROFTEXT TYPE STRING,
ACTIVGRPTEXT TYPE STRING,
RELLIMIT TYPE STRING,
ABSVAR TYPE STRING,
CURRENCY TYPE STRING,
TOLLIMUSE TYPE STRING,
MSGTY TYPE STRING,
EVENT TYPE STRING,
EVENTTEXT TYPE STRING,
DEACTIVE TYPE STRING,
TOLPROFCATEG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_BUAVCTOLASS_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_BUAVCTOLASS_STR-CLIENT sy-vline 
WA_V_BUAVCTOLASS_STR-APPLIC sy-vline 
WA_V_BUAVCTOLASS_STR-TOLPROF sy-vline 
WA_V_BUAVCTOLASS_STR-CEILTYPE sy-vline 
WA_V_BUAVCTOLASS_STR-ACTIVGRP sy-vline 
WA_V_BUAVCTOLASS_STR-CHECK_ORDER sy-vline 
WA_V_BUAVCTOLASS_STR-TOLPROFTEXT sy-vline 
WA_V_BUAVCTOLASS_STR-ACTIVGRPTEXT sy-vline 
WA_V_BUAVCTOLASS_STR-RELLIMIT sy-vline 
WA_V_BUAVCTOLASS_STR-ABSVAR sy-vline 
WA_V_BUAVCTOLASS_STR-CURRENCY sy-vline 
WA_V_BUAVCTOLASS_STR-TOLLIMUSE sy-vline 
WA_V_BUAVCTOLASS_STR-MSGTY sy-vline 
WA_V_BUAVCTOLASS_STR-EVENT sy-vline 
WA_V_BUAVCTOLASS_STR-EVENTTEXT sy-vline 
WA_V_BUAVCTOLASS_STR-DEACTIVE sy-vline 
WA_V_BUAVCTOLASS_STR-TOLPROFCATEG sy-vline      INTO ld_text SEPARATED BY SPACE.

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