ABAP Select data from SAP table JBDBSTW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM JBDBSTW
*  INTO TABLE @DATA(IT_JBDBSTW2).
*--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_JBDBSTW INDEX 1 INTO DATA(WA_JBDBSTW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<JBDBSTW>-MANDT = 1.
<JBDBSTW>-OBJNR = 1.
<JBDBSTW>-DBSTND = 1.
<JBDBSTW>-ABMENG = 1.
<JBDBSTW>-ABMENGV = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_JBDBSTW-ABKNTK, sy-vline,
  WA_JBDBSTW-ABKNTKV, sy-vline,
  WA_JBDBSTW-BBBETR, sy-vline,
  WA_JBDBSTW-BBBETRV, sy-vline,
  WA_JBDBSTW-BPGLDKU, sy-vline,
  WA_JBDBSTW-KGLDKU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_JBDBSTW 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_JBDBSTW 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_JBDBSTW INTO WA_JBDBSTW.


*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 EXCRT, internal->external for field KGLDKU
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_JBDBSTW-KGLDKU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JBDBSTW-KGLDKU.
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_JBDBSTW_STR, 
MANDT TYPE STRING,
OBJNR TYPE STRING,
DBSTND TYPE STRING,
ABMENG TYPE STRING,
ABMENGV TYPE STRING,
ABKNTK TYPE STRING,
ABKNTKV TYPE STRING,
BBBETR TYPE STRING,
BBBETRV TYPE STRING,
BPGLDKU TYPE STRING,
KGLDKU TYPE STRING,
NGLDKU TYPE STRING,
BGLDKU TYPE STRING,
EGLDKU TYPE STRING,
BBWHR TYPE STRING,
BHWHR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_JBDBSTW_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_JBDBSTW_STR-MANDT sy-vline 
WA_JBDBSTW_STR-OBJNR sy-vline 
WA_JBDBSTW_STR-DBSTND sy-vline 
WA_JBDBSTW_STR-ABMENG sy-vline 
WA_JBDBSTW_STR-ABMENGV sy-vline 
WA_JBDBSTW_STR-ABKNTK sy-vline 
WA_JBDBSTW_STR-ABKNTKV sy-vline 
WA_JBDBSTW_STR-BBBETR sy-vline 
WA_JBDBSTW_STR-BBBETRV sy-vline 
WA_JBDBSTW_STR-BPGLDKU sy-vline 
WA_JBDBSTW_STR-KGLDKU sy-vline 
WA_JBDBSTW_STR-NGLDKU sy-vline 
WA_JBDBSTW_STR-BGLDKU sy-vline 
WA_JBDBSTW_STR-EGLDKU sy-vline 
WA_JBDBSTW_STR-BBWHR sy-vline 
WA_JBDBSTW_STR-BHWHR sy-vline      INTO ld_text SEPARATED BY SPACE.

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