ABAP Select data from SAP table JBVREGW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM JBVREGW
*  INTO TABLE @DATA(IT_JBVREGW2).
*--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_JBVREGW INDEX 1 INTO DATA(WA_JBVREGW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<JBVREGW>-MANDT = 1.
<JBVREGW>-REGELID = 1.
<JBVREGW>-REGELIDX = 1.
<JBVREGW>-RFTYP = 1.
<JBVREGW>-WAERS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_JBVREGW-SZKART, sy-vline,
  WA_JBVREGW-KURVPW, sy-vline,
  WA_JBVREGW-KURVAW, sy-vline,
  WA_JBVREGW-REFERENZ, sy-vline,
  WA_JBVREGW-FCURR, sy-vline,
  WA_JBVREGW-TCURR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_JBVREGW 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_JBVREGW 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_JBVREGW INTO WA_JBVREGW.


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

*Conversion exit EXCRT, internal->external for field DEVPTS
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_JBVREGW-DEVPTS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JBVREGW-DEVPTS.
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_JBVREGW_STR, 
MANDT TYPE STRING,
REGELID TYPE STRING,
REGELIDX TYPE STRING,
RFTYP TYPE STRING,
WAERS TYPE STRING,
SZKART TYPE STRING,
KURVPW TYPE STRING,
KURVAW TYPE STRING,
REFERENZ TYPE STRING,
FCURR TYPE STRING,
TCURR TYPE STRING,
ALLEF TYPE STRING,
WPINDEX TYPE STRING,
ALLEIDX TYPE STRING,
VOLART TYPE STRING,
LFZEIT TYPE STRING,
ALLEVO TYPE STRING,
ALLELFZ TYPE STRING,
SMETH TYPE STRING,
SHIFT TYPE STRING,
BASISPTS TYPE STRING,
DEVPTS TYPE STRING,
INDEXPTS TYPE STRING,
VOLAPTS TYPE STRING,
KBEZ TYPE STRING,
LBEZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_JBVREGW_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_JBVREGW_STR-MANDT sy-vline 
WA_JBVREGW_STR-REGELID sy-vline 
WA_JBVREGW_STR-REGELIDX sy-vline 
WA_JBVREGW_STR-RFTYP sy-vline 
WA_JBVREGW_STR-WAERS sy-vline 
WA_JBVREGW_STR-SZKART sy-vline 
WA_JBVREGW_STR-KURVPW sy-vline 
WA_JBVREGW_STR-KURVAW sy-vline 
WA_JBVREGW_STR-REFERENZ sy-vline 
WA_JBVREGW_STR-FCURR sy-vline 
WA_JBVREGW_STR-TCURR sy-vline 
WA_JBVREGW_STR-ALLEF sy-vline 
WA_JBVREGW_STR-WPINDEX sy-vline 
WA_JBVREGW_STR-ALLEIDX sy-vline 
WA_JBVREGW_STR-VOLART sy-vline 
WA_JBVREGW_STR-LFZEIT sy-vline 
WA_JBVREGW_STR-ALLEVO sy-vline 
WA_JBVREGW_STR-ALLELFZ sy-vline 
WA_JBVREGW_STR-SMETH sy-vline 
WA_JBVREGW_STR-SHIFT sy-vline 
WA_JBVREGW_STR-BASISPTS sy-vline 
WA_JBVREGW_STR-DEVPTS sy-vline 
WA_JBVREGW_STR-INDEXPTS sy-vline 
WA_JBVREGW_STR-VOLAPTS sy-vline 
WA_JBVREGW_STR-KBEZ sy-vline 
WA_JBVREGW_STR-LBEZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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