ABAP Select data from SAP table BWTAR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BWTAR
*  INTO TABLE @DATA(IT_BWTAR2).
*--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_BWTAR INDEX 1 INTO DATA(WA_BWTAR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BWTAR>-MATNR = 1.
<BWTAR>-BWKEY = 1.
<BWTAR>-BWTAR = 1.
<BWTAR>-PSPNR = 1.
<BWTAR>-VBELN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BWTAR-POSNR, sy-vline,
  WA_BWTAR-LBKUM, sy-vline,
  WA_BWTAR-SALK3, sy-vline,
  WA_BWTAR-VPRSV, sy-vline,
  WA_BWTAR-VERPR, sy-vline,
  WA_BWTAR-STPRS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BWTAR 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_BWTAR 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_BWTAR INTO WA_BWTAR.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_BWTAR-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWTAR-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_BWTAR-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWTAR-PSPNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BWTAR-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BWTAR-VBELN.
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_BWTAR_STR, 
MATNR TYPE STRING,
BWKEY TYPE STRING,
BWTAR TYPE STRING,
PSPNR TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
LBKUM TYPE STRING,
SALK3 TYPE STRING,
VPRSV TYPE STRING,
VERPR TYPE STRING,
STPRS TYPE STRING,
PEINH TYPE STRING,
BKLAS TYPE STRING,
KOMOK TYPE STRING,
SALKV TYPE STRING,
VMKUM TYPE STRING,
VMSAL TYPE STRING,
VMVPR TYPE STRING,
VMVER TYPE STRING,
VMSTP TYPE STRING,
VMPEI TYPE STRING,
VMBKL TYPE STRING,
VMKOM TYPE STRING,
VMSAV TYPE STRING,
VVSAL TYPE STRING,
VJKUM TYPE STRING,
VJSAL TYPE STRING,
VJVPR TYPE STRING,
VJVER TYPE STRING,
VJSTP TYPE STRING,
VJPEI TYPE STRING,
VJBKL TYPE STRING,
VJKOM TYPE STRING,
VJSAV TYPE STRING,
LFPER TYPE STRING,
BWTTY TYPE STRING,
EKLAS TYPE STRING,
QKLAS TYPE STRING,
KALN1 TYPE STRING,
LVORM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BWTAR_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_BWTAR_STR-MATNR sy-vline 
WA_BWTAR_STR-BWKEY sy-vline 
WA_BWTAR_STR-BWTAR sy-vline 
WA_BWTAR_STR-PSPNR sy-vline 
WA_BWTAR_STR-VBELN sy-vline 
WA_BWTAR_STR-POSNR sy-vline 
WA_BWTAR_STR-LBKUM sy-vline 
WA_BWTAR_STR-SALK3 sy-vline 
WA_BWTAR_STR-VPRSV sy-vline 
WA_BWTAR_STR-VERPR sy-vline 
WA_BWTAR_STR-STPRS sy-vline 
WA_BWTAR_STR-PEINH sy-vline 
WA_BWTAR_STR-BKLAS sy-vline 
WA_BWTAR_STR-KOMOK sy-vline 
WA_BWTAR_STR-SALKV sy-vline 
WA_BWTAR_STR-VMKUM sy-vline 
WA_BWTAR_STR-VMSAL sy-vline 
WA_BWTAR_STR-VMVPR sy-vline 
WA_BWTAR_STR-VMVER sy-vline 
WA_BWTAR_STR-VMSTP sy-vline 
WA_BWTAR_STR-VMPEI sy-vline 
WA_BWTAR_STR-VMBKL sy-vline 
WA_BWTAR_STR-VMKOM sy-vline 
WA_BWTAR_STR-VMSAV sy-vline 
WA_BWTAR_STR-VVSAL sy-vline 
WA_BWTAR_STR-VJKUM sy-vline 
WA_BWTAR_STR-VJSAL sy-vline 
WA_BWTAR_STR-VJVPR sy-vline 
WA_BWTAR_STR-VJVER sy-vline 
WA_BWTAR_STR-VJSTP sy-vline 
WA_BWTAR_STR-VJPEI sy-vline 
WA_BWTAR_STR-VJBKL sy-vline 
WA_BWTAR_STR-VJKOM sy-vline 
WA_BWTAR_STR-VJSAV sy-vline 
WA_BWTAR_STR-LFPER sy-vline 
WA_BWTAR_STR-BWTTY sy-vline 
WA_BWTAR_STR-EKLAS sy-vline 
WA_BWTAR_STR-QKLAS sy-vline 
WA_BWTAR_STR-KALN1 sy-vline 
WA_BWTAR_STR-LVORM sy-vline      INTO ld_text SEPARATED BY SPACE.

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