ABAP Select data from SAP table BWAC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BWAC
*  INTO TABLE @DATA(IT_BWAC2).
*--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_BWAC INDEX 1 INTO DATA(WA_BWAC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BWAC>-BWART = 1.
<BWAC>-BTEXT = 1.
<BWAC>-SOBKZ = 1.
<BWAC>-KZBEW = 1.
<BWAC>-KZZUG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BWAC-KZVBR, sy-vline,
  WA_BWAC-SHKZG, sy-vline,
  WA_BWAC-KZWES, sy-vline,
  WA_BWAC-KZVBU, sy-vline,
  WA_BWAC-XLAUT, sy-vline,
  WA_BWAC-KZSTR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BWAC 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_BWAC 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_BWAC INTO WA_BWAC.


*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_BWAC_STR, 
BWART TYPE STRING,
BTEXT TYPE STRING,
SOBKZ TYPE STRING,
KZBEW TYPE STRING,
KZZUG TYPE STRING,
KZVBR TYPE STRING,
SHKZG TYPE STRING,
KZWES TYPE STRING,
KZVBU TYPE STRING,
XLAUT TYPE STRING,
KZSTR TYPE STRING,
KZKON TYPE STRING,
SELPA TYPE STRING,
RSTYP TYPE STRING,
KZDRU TYPE STRING,
KZGRU TYPE STRING,
CHNEU TYPE STRING,
KZZDE TYPE STRING,
WERTU TYPE STRING,
MENGU TYPE STRING,
BUSTW TYPE STRING,
BUSTM TYPE STRING,
XOWST TYPE STRING,
XLIFO TYPE STRING,
BWASL TYPE STRING,
RBLVS TYPE STRING,
UMRBL TYPE STRING,
UMRBU TYPE STRING,
ANZRE TYPE STRING,
XLORT TYPE STRING,
XVERF TYPE STRING,
KZVBP TYPE STRING,
VORSL TYPE STRING,
LTEXT TYPE STRING,
KOMOK TYPE STRING,
XPKON TYPE STRING,
HTEXT TYPE STRING,
STEXT TYPE STRING,
ENTRY TYPE STRING,
ENTRY_TOT TYPE STRING,
XINVB TYPE STRING,
QSSBW TYPE STRING,
QSSHK TYPE STRING,
XPBED TYPE STRING,
PRREG TYPE STRING,
TCODE TYPE STRING,
BWART_RL TYPE STRING,
BWART_ST TYPE STRING,
KZCLA TYPE STRING,
KZMHD TYPE STRING,
XKOKO TYPE STRING,
TEXT20 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BWAC_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_BWAC_STR-BWART sy-vline 
WA_BWAC_STR-BTEXT sy-vline 
WA_BWAC_STR-SOBKZ sy-vline 
WA_BWAC_STR-KZBEW sy-vline 
WA_BWAC_STR-KZZUG sy-vline 
WA_BWAC_STR-KZVBR sy-vline 
WA_BWAC_STR-SHKZG sy-vline 
WA_BWAC_STR-KZWES sy-vline 
WA_BWAC_STR-KZVBU sy-vline 
WA_BWAC_STR-XLAUT sy-vline 
WA_BWAC_STR-KZSTR sy-vline 
WA_BWAC_STR-KZKON sy-vline 
WA_BWAC_STR-SELPA sy-vline 
WA_BWAC_STR-RSTYP sy-vline 
WA_BWAC_STR-KZDRU sy-vline 
WA_BWAC_STR-KZGRU sy-vline 
WA_BWAC_STR-CHNEU sy-vline 
WA_BWAC_STR-KZZDE sy-vline 
WA_BWAC_STR-WERTU sy-vline 
WA_BWAC_STR-MENGU sy-vline 
WA_BWAC_STR-BUSTW sy-vline 
WA_BWAC_STR-BUSTM sy-vline 
WA_BWAC_STR-XOWST sy-vline 
WA_BWAC_STR-XLIFO sy-vline 
WA_BWAC_STR-BWASL sy-vline 
WA_BWAC_STR-RBLVS sy-vline 
WA_BWAC_STR-UMRBL sy-vline 
WA_BWAC_STR-UMRBU sy-vline 
WA_BWAC_STR-ANZRE sy-vline 
WA_BWAC_STR-XLORT sy-vline 
WA_BWAC_STR-XVERF sy-vline 
WA_BWAC_STR-KZVBP sy-vline 
WA_BWAC_STR-VORSL sy-vline 
WA_BWAC_STR-LTEXT sy-vline 
WA_BWAC_STR-KOMOK sy-vline 
WA_BWAC_STR-XPKON sy-vline 
WA_BWAC_STR-HTEXT sy-vline 
WA_BWAC_STR-STEXT sy-vline 
WA_BWAC_STR-ENTRY sy-vline 
WA_BWAC_STR-ENTRY_TOT sy-vline 
WA_BWAC_STR-XINVB sy-vline 
WA_BWAC_STR-QSSBW sy-vline 
WA_BWAC_STR-QSSHK sy-vline 
WA_BWAC_STR-XPBED sy-vline 
WA_BWAC_STR-PRREG sy-vline 
WA_BWAC_STR-TCODE sy-vline 
WA_BWAC_STR-BWART_RL sy-vline 
WA_BWAC_STR-BWART_ST sy-vline 
WA_BWAC_STR-KZCLA sy-vline 
WA_BWAC_STR-KZMHD sy-vline 
WA_BWAC_STR-XKOKO sy-vline 
WA_BWAC_STR-TEXT20 sy-vline      INTO ld_text SEPARATED BY SPACE.

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