ABAP Select data from SAP table BEWC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BEWC
*  INTO TABLE @DATA(IT_BEWC2).
*--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_BEWC INDEX 1 INTO DATA(WA_BEWC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BEWC>-ORGBZ = 1.
<BEWC>-ORT01 = 1.
<BEWC>-ORGKZ = 1.
<BEWC>-BWKEY = 1.
<BEWC>-BWTTY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BEWC-BTBEZ, sy-vline,
  WA_BEWC-VBWAF, sy-vline,
  WA_BEWC-KZVBF, sy-vline,
  WA_BEWC-VBWAE, sy-vline,
  WA_BEWC-KZVBE, sy-vline,
  WA_BEWC-KZBAA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BEWC 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_BEWC 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_BEWC INTO WA_BEWC.


*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_BEWC_STR, 
ORGBZ TYPE STRING,
ORT01 TYPE STRING,
ORGKZ TYPE STRING,
BWKEY TYPE STRING,
BWTTY TYPE STRING,
BTBEZ TYPE STRING,
VBWAF TYPE STRING,
KZVBF TYPE STRING,
VBWAE TYPE STRING,
KZVBE TYPE STRING,
KZBAA TYPE STRING,
VBWAA TYPE STRING,
KZVBA TYPE STRING,
BWTAR TYPE STRING,
KKREF TYPE STRING,
KRFTX TYPE STRING,
BKLAS TYPE STRING,
BKBEZ TYPE STRING,
BSEXT TYPE STRING,
BSINT TYPE STRING,
V_ENTRY TYPE STRING,
MAX_ENTRY TYPE STRING,
STATUS_D TYPE STRING,
HEAD1 TYPE STRING,
HEAD2 TYPE STRING,
HEAD3 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BEWC_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_BEWC_STR-ORGBZ sy-vline 
WA_BEWC_STR-ORT01 sy-vline 
WA_BEWC_STR-ORGKZ sy-vline 
WA_BEWC_STR-BWKEY sy-vline 
WA_BEWC_STR-BWTTY sy-vline 
WA_BEWC_STR-BTBEZ sy-vline 
WA_BEWC_STR-VBWAF sy-vline 
WA_BEWC_STR-KZVBF sy-vline 
WA_BEWC_STR-VBWAE sy-vline 
WA_BEWC_STR-KZVBE sy-vline 
WA_BEWC_STR-KZBAA sy-vline 
WA_BEWC_STR-VBWAA sy-vline 
WA_BEWC_STR-KZVBA sy-vline 
WA_BEWC_STR-BWTAR sy-vline 
WA_BEWC_STR-KKREF sy-vline 
WA_BEWC_STR-KRFTX sy-vline 
WA_BEWC_STR-BKLAS sy-vline 
WA_BEWC_STR-BKBEZ sy-vline 
WA_BEWC_STR-BSEXT sy-vline 
WA_BEWC_STR-BSINT sy-vline 
WA_BEWC_STR-V_ENTRY sy-vline 
WA_BEWC_STR-MAX_ENTRY sy-vline 
WA_BEWC_STR-STATUS_D sy-vline 
WA_BEWC_STR-HEAD1 sy-vline 
WA_BEWC_STR-HEAD2 sy-vline 
WA_BEWC_STR-HEAD3 sy-vline      INTO ld_text SEPARATED BY SPACE.

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