ABAP Select data from SAP table VZWERTP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VZWERTP
*  INTO TABLE @DATA(IT_VZWERTP2).
*--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_VZWERTP INDEX 1 INTO DATA(WA_VZWERTP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VZWERTP>-MANDT = 1.
<VZWERTP>-BUKRS = 1.
<VZWERTP>-RLDEPO = 1.
<VZWERTP>-RANL = 1.
<VZWERTP>-SZBMETH = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VZWERTP-BKOND, sy-vline,
  WA_VZWERTP-SWHRKOND, sy-vline,
  WA_VZWERTP-XALKZ, sy-vline,
  WA_VZWERTP-SWERTTYP, sy-vline,
  WA_VZWERTP-BNOMS, sy-vline,
  WA_VZWERTP-SKLASS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VZWERTP 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_VZWERTP 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_VZWERTP INTO WA_VZWERTP.


*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 RANL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VZWERTP-RANL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VZWERTP-RANL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RDPBANK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VZWERTP-RDPBANK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VZWERTP-RDPBANK.
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_VZWERTP_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
RLDEPO TYPE STRING,
RANL TYPE STRING,
SZBMETH TYPE STRING,
BKOND TYPE STRING,
SWHRKOND TYPE STRING,
XALKZ TYPE STRING,
SWERTTYP TYPE STRING,
BNOMS TYPE STRING,
SKLASS TYPE STRING,
RGSBER TYPE STRING,
RDEPOTNR TYPE STRING,
RDPBANK TYPE STRING,
VERKONTO TYPE STRING,
RHANDPL TYPE STRING,
DKEMI TYPE STRING,
DAUSL TYPE STRING,
PEFFZINS TYPE STRING,
BATRT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VZWERTP_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_VZWERTP_STR-MANDT sy-vline 
WA_VZWERTP_STR-BUKRS sy-vline 
WA_VZWERTP_STR-RLDEPO sy-vline 
WA_VZWERTP_STR-RANL sy-vline 
WA_VZWERTP_STR-SZBMETH sy-vline 
WA_VZWERTP_STR-BKOND sy-vline 
WA_VZWERTP_STR-SWHRKOND sy-vline 
WA_VZWERTP_STR-XALKZ sy-vline 
WA_VZWERTP_STR-SWERTTYP sy-vline 
WA_VZWERTP_STR-BNOMS sy-vline 
WA_VZWERTP_STR-SKLASS sy-vline 
WA_VZWERTP_STR-RGSBER sy-vline 
WA_VZWERTP_STR-RDEPOTNR sy-vline 
WA_VZWERTP_STR-RDPBANK sy-vline 
WA_VZWERTP_STR-VERKONTO sy-vline 
WA_VZWERTP_STR-RHANDPL sy-vline 
WA_VZWERTP_STR-DKEMI sy-vline 
WA_VZWERTP_STR-DAUSL sy-vline 
WA_VZWERTP_STR-PEFFZINS sy-vline 
WA_VZWERTP_STR-BATRT sy-vline      INTO ld_text SEPARATED BY SPACE.

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