ABAP Select data from SAP table WB2_RBKPRSEG_1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WB2_RBKPRSEG_1 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 WB2_RBKPRSEG_1. 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 WB2_RBKPRSEG_1 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_WB2_RBKPRSEG_1 TYPE STANDARD TABLE OF WB2_RBKPRSEG_1,
      WA_WB2_RBKPRSEG_1 TYPE WB2_RBKPRSEG_1,
      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: <WB2_RBKPRSEG_1> TYPE WB2_RBKPRSEG_1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_WB2_RBKPRSEG_1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM WB2_RBKPRSEG_1
  INTO TABLE IT_WB2_RBKPRSEG_1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WB2_RBKPRSEG_1
*  INTO TABLE @DATA(IT_WB2_RBKPRSEG_12).
*--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_WB2_RBKPRSEG_1 INDEX 1 INTO DATA(WA_WB2_RBKPRSEG_12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_WB2_RBKPRSEG_1 ASSIGNING <WB2_RBKPRSEG_1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WB2_RBKPRSEG_1>-MANDT = 1.
<WB2_RBKPRSEG_1>-BELNR = 1.
<WB2_RBKPRSEG_1>-GJAHR = 1.
<WB2_RBKPRSEG_1>-BUZEI = 1.
<WB2_RBKPRSEG_1>-BUDAT = 1.

ENDLOOP.

LOOP AT IT_WB2_RBKPRSEG_1 INTO WA_WB2_RBKPRSEG_1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WB2_RBKPRSEG_1-BUKRS, sy-vline,
  WA_WB2_RBKPRSEG_1-LIFRE, sy-vline,
  WA_WB2_RBKPRSEG_1-WAERS, sy-vline,
  WA_WB2_RBKPRSEG_1-MATNR, sy-vline,
  WA_WB2_RBKPRSEG_1-WERKS, sy-vline,
  WA_WB2_RBKPRSEG_1-WRBTR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WB2_RBKPRSEG_1 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_WB2_RBKPRSEG_1 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_WB2_RBKPRSEG_1 INTO WA_WB2_RBKPRSEG_1.


*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 BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WB2_RBKPRSEG_1-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WB2_RBKPRSEG_1-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_WB2_RBKPRSEG_1-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WB2_RBKPRSEG_1-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFRE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WB2_RBKPRSEG_1-LIFRE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WB2_RBKPRSEG_1-LIFRE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WB2_RBKPRSEG_1-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WB2_RBKPRSEG_1-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BSTME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_WB2_RBKPRSEG_1-BSTME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WB2_RBKPRSEG_1-BSTME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WB2_RBKPRSEG_1-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WB2_RBKPRSEG_1-PRCTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AKTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WB2_RBKPRSEG_1-AKTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WB2_RBKPRSEG_1-AKTNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LLIEF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WB2_RBKPRSEG_1-LLIEF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WB2_RBKPRSEG_1-LLIEF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WB2_RBKPRSEG_1-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WB2_RBKPRSEG_1-LIFNR.
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_WB2_RBKPRSEG_1_STR, 
MANDT TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BUZEI TYPE STRING,
BUDAT TYPE STRING,
BUKRS TYPE STRING,
LIFRE TYPE STRING,
WAERS TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
WRBTR TYPE STRING,
SHKZG TYPE STRING,
EKORG TYPE STRING,
MENGE TYPE STRING,
BSTME TYPE STRING,
PRCTR TYPE STRING,
MWSKZ TYPE STRING,
LTSNR TYPE STRING,
EKKOL TYPE STRING,
AKTNR TYPE STRING,
MATKL TYPE STRING,
PSTYP TYPE STRING,
BSART TYPE STRING,
LLIEF TYPE STRING,
LIFNR TYPE STRING,
TXJCD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WB2_RBKPRSEG_1_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_WB2_RBKPRSEG_1_STR-MANDT sy-vline 
WA_WB2_RBKPRSEG_1_STR-BELNR sy-vline 
WA_WB2_RBKPRSEG_1_STR-GJAHR sy-vline 
WA_WB2_RBKPRSEG_1_STR-BUZEI sy-vline 
WA_WB2_RBKPRSEG_1_STR-BUDAT sy-vline 
WA_WB2_RBKPRSEG_1_STR-BUKRS sy-vline 
WA_WB2_RBKPRSEG_1_STR-LIFRE sy-vline 
WA_WB2_RBKPRSEG_1_STR-WAERS sy-vline 
WA_WB2_RBKPRSEG_1_STR-MATNR sy-vline 
WA_WB2_RBKPRSEG_1_STR-WERKS sy-vline 
WA_WB2_RBKPRSEG_1_STR-WRBTR sy-vline 
WA_WB2_RBKPRSEG_1_STR-SHKZG sy-vline 
WA_WB2_RBKPRSEG_1_STR-EKORG sy-vline 
WA_WB2_RBKPRSEG_1_STR-MENGE sy-vline 
WA_WB2_RBKPRSEG_1_STR-BSTME sy-vline 
WA_WB2_RBKPRSEG_1_STR-PRCTR sy-vline 
WA_WB2_RBKPRSEG_1_STR-MWSKZ sy-vline 
WA_WB2_RBKPRSEG_1_STR-LTSNR sy-vline 
WA_WB2_RBKPRSEG_1_STR-EKKOL sy-vline 
WA_WB2_RBKPRSEG_1_STR-AKTNR sy-vline 
WA_WB2_RBKPRSEG_1_STR-MATKL sy-vline 
WA_WB2_RBKPRSEG_1_STR-PSTYP sy-vline 
WA_WB2_RBKPRSEG_1_STR-BSART sy-vline 
WA_WB2_RBKPRSEG_1_STR-LLIEF sy-vline 
WA_WB2_RBKPRSEG_1_STR-LIFNR sy-vline 
WA_WB2_RBKPRSEG_1_STR-TXJCD sy-vline      INTO ld_text SEPARATED BY SPACE.

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