ABAP Select data from SAP table BTCVBSK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BTCVBSK
*  INTO TABLE @DATA(IT_BTCVBSK2).
*--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_BTCVBSK INDEX 1 INTO DATA(WA_BTCVBSK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BTCVBSK>-MANDT = 1.
<BTCVBSK>-SAMMG = 1.
<BTCVBSK>-SMART = 1.
<BTCVBSK>-ERNAM = 1.
<BTCVBSK>-ERDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BTCVBSK-UZEIT, sy-vline,
  WA_BTCVBSK-VBNUM, sy-vline,
  WA_BTCVBSK-ERNUM, sy-vline,
  WA_BTCVBSK-BRGEW, sy-vline,
  WA_BTCVBSK-GEWEI, sy-vline,
  WA_BTCVBSK-VOLUM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BTCVBSK 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_BTCVBSK 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_BTCVBSK INTO WA_BTCVBSK.


*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 ALPHA, internal->external for field SAMMG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BTCVBSK-SAMMG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BTCVBSK-SAMMG.
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_BTCVBSK_STR, 
MANDT TYPE STRING,
SAMMG TYPE STRING,
SMART TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
UZEIT TYPE STRING,
VBNUM TYPE STRING,
ERNUM TYPE STRING,
BRGEW TYPE STRING,
GEWEI TYPE STRING,
VOLUM TYPE STRING,
VOLEH TYPE STRING,
VSTEL TYPE STRING,
VTEXT TYPE STRING,
MAXZT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BTCVBSK_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_BTCVBSK_STR-MANDT sy-vline 
WA_BTCVBSK_STR-SAMMG sy-vline 
WA_BTCVBSK_STR-SMART sy-vline 
WA_BTCVBSK_STR-ERNAM sy-vline 
WA_BTCVBSK_STR-ERDAT sy-vline 
WA_BTCVBSK_STR-UZEIT sy-vline 
WA_BTCVBSK_STR-VBNUM sy-vline 
WA_BTCVBSK_STR-ERNUM sy-vline 
WA_BTCVBSK_STR-BRGEW sy-vline 
WA_BTCVBSK_STR-GEWEI sy-vline 
WA_BTCVBSK_STR-VOLUM sy-vline 
WA_BTCVBSK_STR-VOLEH sy-vline 
WA_BTCVBSK_STR-VSTEL sy-vline 
WA_BTCVBSK_STR-VTEXT sy-vline 
WA_BTCVBSK_STR-MAXZT sy-vline      INTO ld_text SEPARATED BY SPACE.

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