ABAP Select data from SAP table WBRREVB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WBRREVB
*  INTO TABLE @DATA(IT_WBRREVB2).
*--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_WBRREVB INDEX 1 INTO DATA(WA_WBRREVB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WBRREVB>-MANDT = 1.
<WBRREVB>-RUUID = 1.
<WBRREVB>-WDTYP_LI = 1.
<WBRREVB>-EXT_DOC_NR = 1.
<WBRREVB>-EXT_DOC_YEAR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WBRREVB-EXT_DOC_BUKRS, sy-vline,
  WA_WBRREVB-EXT_DOC_ITEM, sy-vline,
  WA_WBRREVB-RRLPA, sy-vline,
  WA_WBRREVB-RRLCG, sy-vline,
  WA_WBRREVB-WBELN_RL, sy-vline,
  WA_WBRREVB-RRLREC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WBRREVB 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_WBRREVB 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_WBRREVB INTO WA_WBRREVB.


*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 GJAHR, internal->external for field EXT_DOC_YEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_WBRREVB-EXT_DOC_YEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WBRREVB-EXT_DOC_YEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RRLCG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WBRREVB-RRLCG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WBRREVB-RRLCG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WBELN_RL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WBRREVB-WBELN_RL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WBRREVB-WBELN_RL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RRLREC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WBRREVB-RRLREC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WBRREVB-RRLREC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field WKURS_RL
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_WBRREVB-WKURS_RL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WBRREVB-WKURS_RL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field WKURS_HW_RL
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_WBRREVB-WKURS_HW_RL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WBRREVB-WKURS_HW_RL.
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_WBRREVB_STR, 
MANDT TYPE STRING,
RUUID TYPE STRING,
WDTYP_LI TYPE STRING,
EXT_DOC_NR TYPE STRING,
EXT_DOC_YEAR TYPE STRING,
EXT_DOC_BUKRS TYPE STRING,
EXT_DOC_ITEM TYPE STRING,
RRLPA TYPE STRING,
RRLCG TYPE STRING,
WBELN_RL TYPE STRING,
RRLREC TYPE STRING,
LFART_RL TYPE STRING,
WFDAT_RL TYPE STRING,
WAERL_RL TYPE STRING,
WKURS_RL TYPE STRING,
KURST_RL TYPE STRING,
WKURS_HW_RL TYPE STRING,
UPDKZ TYPE STRING,
OBJECT_ID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WBRREVB_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_WBRREVB_STR-MANDT sy-vline 
WA_WBRREVB_STR-RUUID sy-vline 
WA_WBRREVB_STR-WDTYP_LI sy-vline 
WA_WBRREVB_STR-EXT_DOC_NR sy-vline 
WA_WBRREVB_STR-EXT_DOC_YEAR sy-vline 
WA_WBRREVB_STR-EXT_DOC_BUKRS sy-vline 
WA_WBRREVB_STR-EXT_DOC_ITEM sy-vline 
WA_WBRREVB_STR-RRLPA sy-vline 
WA_WBRREVB_STR-RRLCG sy-vline 
WA_WBRREVB_STR-WBELN_RL sy-vline 
WA_WBRREVB_STR-RRLREC sy-vline 
WA_WBRREVB_STR-LFART_RL sy-vline 
WA_WBRREVB_STR-WFDAT_RL sy-vline 
WA_WBRREVB_STR-WAERL_RL sy-vline 
WA_WBRREVB_STR-WKURS_RL sy-vline 
WA_WBRREVB_STR-KURST_RL sy-vline 
WA_WBRREVB_STR-WKURS_HW_RL sy-vline 
WA_WBRREVB_STR-UPDKZ sy-vline 
WA_WBRREVB_STR-OBJECT_ID sy-vline      INTO ld_text SEPARATED BY SPACE.

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