ABAP Select data from SAP table BUFFER_VIVW01 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BUFFER_VIVW01 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 BUFFER_VIVW01. 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 BUFFER_VIVW01 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_BUFFER_VIVW01 TYPE STANDARD TABLE OF BUFFER_VIVW01,
      WA_BUFFER_VIVW01 TYPE BUFFER_VIVW01,
      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: <BUFFER_VIVW01> TYPE BUFFER_VIVW01.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_BUFFER_VIVW01.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM BUFFER_VIVW01
  INTO TABLE IT_BUFFER_VIVW01.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BUFFER_VIVW01
*  INTO TABLE @DATA(IT_BUFFER_VIVW012).
*--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_BUFFER_VIVW01 INDEX 1 INTO DATA(WA_BUFFER_VIVW012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_BUFFER_VIVW01 ASSIGNING <BUFFER_VIVW01>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BUFFER_VIVW01>-MANDT = 1.
<BUFFER_VIVW01>-BUKRS = 1.
<BUFFER_VIVW01>-SVWNR = 1.
<BUFFER_VIVW01>-IMKEY = 1.
<BUFFER_VIVW01>-INTRENO = 1.

ENDLOOP.

LOOP AT IT_BUFFER_VIVW01 INTO WA_BUFFER_VIVW01.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BUFFER_VIVW01-J_OBJNR, sy-vline,
  WA_BUFFER_VIVW01-DVWBEG, sy-vline,
  WA_BUFFER_VIVW01-DVWEND, sy-vline,
  WA_BUFFER_VIVW01-LAUFZ, sy-vline,
  WA_BUFFER_VIVW01-LZEINS, sy-vline,
  WA_BUFFER_VIVW01-VERL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BUFFER_VIVW01 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_BUFFER_VIVW01 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_BUFFER_VIVW01 INTO WA_BUFFER_VIVW01.


*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 SVWNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BUFFER_VIVW01-SVWNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BUFFER_VIVW01-SVWNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit IMKEY, internal->external for field IMKEY
CALL FUNCTION 'CONVERSION_EXIT_IMKEY_OUTPUT'
  EXPORTING
    input =                      WA_BUFFER_VIVW01-IMKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BUFFER_VIVW01-IMKEY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BUFFER_VIVW01-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BUFFER_VIVW01-PRCTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BUFFER_VIVW01-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BUFFER_VIVW01-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BUFFER_VIVW01-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BUFFER_VIVW01-LIFNR.
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_BUFFER_VIVW01_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
SVWNR TYPE STRING,
IMKEY TYPE STRING,
INTRENO TYPE STRING,
J_OBJNR TYPE STRING,
DVWBEG TYPE STRING,
DVWEND TYPE STRING,
LAUFZ TYPE STRING,
LZEINS TYPE STRING,
VERL TYPE STRING,
VZEINS TYPE STRING,
AKUEFR TYPE STRING,
KZEINS TYPE STRING,
KUEFR TYPE STRING,
DKUEAM TYPE STRING,
DKUEZUM TYPE STRING,
JLOESCH TYPE STRING,
XVWTEXT TYPE STRING,
WAERS TYPE STRING,
DVWSOLL TYPE STRING,
DVWABR TYPE STRING,
BUKRSPRT TYPE STRING,
GSBERPRT TYPE STRING,
GSBER TYPE STRING,
PRCTR 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,
BUKRS_OBJ TYPE STRING,
KUNNR TYPE STRING,
ZLSCH_DEB TYPE STRING,
ZAHLS_DEB TYPE STRING,
LIFNR TYPE STRING,
ZLSCH_KRED TYPE STRING,
ZAHLS_KRED TYPE STRING,
NO_OBJEKT TYPE STRING,
TXJCD TYPE STRING,
DFLOWFIX TYPE STRING,
NO_OWNER TYPE STRING,
NO_MANAG TYPE STRING,
HBKID_DEB TYPE STRING,
HBKID_KRED TYPE STRING,
KOEIGR TYPE STRING,
BERGRP TYPE STRING,
KZHBKID_EIG TYPE STRING,
HBKID_EIG TYPE STRING,
KZESR TYPE STRING,
ESRNR_EIG TYPE STRING,
ESRKUID_EIG TYPE STRING,
KZMWST TYPE STRING,
MWSTNR_EIG TYPE STRING,
KZEIGGKT TYPE STRING,
BUKRS_GKT TYPE STRING,
NOT_FOUND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BUFFER_VIVW01_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_BUFFER_VIVW01_STR-MANDT sy-vline 
WA_BUFFER_VIVW01_STR-BUKRS sy-vline 
WA_BUFFER_VIVW01_STR-SVWNR sy-vline 
WA_BUFFER_VIVW01_STR-IMKEY sy-vline 
WA_BUFFER_VIVW01_STR-INTRENO sy-vline 
WA_BUFFER_VIVW01_STR-J_OBJNR sy-vline 
WA_BUFFER_VIVW01_STR-DVWBEG sy-vline 
WA_BUFFER_VIVW01_STR-DVWEND sy-vline 
WA_BUFFER_VIVW01_STR-LAUFZ sy-vline 
WA_BUFFER_VIVW01_STR-LZEINS sy-vline 
WA_BUFFER_VIVW01_STR-VERL sy-vline 
WA_BUFFER_VIVW01_STR-VZEINS sy-vline 
WA_BUFFER_VIVW01_STR-AKUEFR sy-vline 
WA_BUFFER_VIVW01_STR-KZEINS sy-vline 
WA_BUFFER_VIVW01_STR-KUEFR sy-vline 
WA_BUFFER_VIVW01_STR-DKUEAM sy-vline 
WA_BUFFER_VIVW01_STR-DKUEZUM sy-vline 
WA_BUFFER_VIVW01_STR-JLOESCH sy-vline 
WA_BUFFER_VIVW01_STR-XVWTEXT sy-vline 
WA_BUFFER_VIVW01_STR-WAERS sy-vline 
WA_BUFFER_VIVW01_STR-DVWSOLL sy-vline 
WA_BUFFER_VIVW01_STR-DVWABR sy-vline 
WA_BUFFER_VIVW01_STR-BUKRSPRT sy-vline 
WA_BUFFER_VIVW01_STR-GSBERPRT sy-vline 
WA_BUFFER_VIVW01_STR-GSBER sy-vline 
WA_BUFFER_VIVW01_STR-PRCTR sy-vline 
WA_BUFFER_VIVW01_STR-RERF sy-vline 
WA_BUFFER_VIVW01_STR-DERF sy-vline 
WA_BUFFER_VIVW01_STR-TERF sy-vline 
WA_BUFFER_VIVW01_STR-REHER sy-vline 
WA_BUFFER_VIVW01_STR-RBEAR sy-vline 
WA_BUFFER_VIVW01_STR-DBEAR sy-vline 
WA_BUFFER_VIVW01_STR-TBEAR sy-vline 
WA_BUFFER_VIVW01_STR-RBHER sy-vline 
WA_BUFFER_VIVW01_STR-BUKRS_OBJ sy-vline 
WA_BUFFER_VIVW01_STR-KUNNR sy-vline 
WA_BUFFER_VIVW01_STR-ZLSCH_DEB sy-vline 
WA_BUFFER_VIVW01_STR-ZAHLS_DEB sy-vline 
WA_BUFFER_VIVW01_STR-LIFNR sy-vline 
WA_BUFFER_VIVW01_STR-ZLSCH_KRED sy-vline 
WA_BUFFER_VIVW01_STR-ZAHLS_KRED sy-vline 
WA_BUFFER_VIVW01_STR-NO_OBJEKT sy-vline 
WA_BUFFER_VIVW01_STR-TXJCD sy-vline 
WA_BUFFER_VIVW01_STR-DFLOWFIX sy-vline 
WA_BUFFER_VIVW01_STR-NO_OWNER sy-vline 
WA_BUFFER_VIVW01_STR-NO_MANAG sy-vline 
WA_BUFFER_VIVW01_STR-HBKID_DEB sy-vline 
WA_BUFFER_VIVW01_STR-HBKID_KRED sy-vline 
WA_BUFFER_VIVW01_STR-KOEIGR sy-vline 
WA_BUFFER_VIVW01_STR-BERGRP sy-vline 
WA_BUFFER_VIVW01_STR-KZHBKID_EIG sy-vline 
WA_BUFFER_VIVW01_STR-HBKID_EIG sy-vline 
WA_BUFFER_VIVW01_STR-KZESR sy-vline 
WA_BUFFER_VIVW01_STR-ESRNR_EIG sy-vline 
WA_BUFFER_VIVW01_STR-ESRKUID_EIG sy-vline 
WA_BUFFER_VIVW01_STR-KZMWST sy-vline 
WA_BUFFER_VIVW01_STR-MWSTNR_EIG sy-vline 
WA_BUFFER_VIVW01_STR-KZEIGGKT sy-vline 
WA_BUFFER_VIVW01_STR-BUKRS_GKT sy-vline 
WA_BUFFER_VIVW01_STR-NOT_FOUND sy-vline      INTO ld_text SEPARATED BY SPACE.

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