ABAP Select data from SAP table REWBHILABK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REWBHILABK
*  INTO TABLE @DATA(IT_REWBHILABK2).
*--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_REWBHILABK INDEX 1 INTO DATA(WA_REWBHILABK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REWBHILABK>-SWBNR = 1.
<REWBHILABK>-SWBIND = 1.
<REWBHILABK>-AUFWGRP = 1.
<REWBHILABK>-XAUFWGRP = 1.
<REWBHILABK>-AUFWART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REWBHILABK-XAUFWART, sy-vline,
  WA_REWBHILABK-ZUDAT, sy-vline,
  WA_REWBHILABK-RGUEBIS, sy-vline,
  WA_REWBHILABK-ANZMEAUFW, sy-vline,
  WA_REWBHILABK-ANZMEWB, sy-vline,
  WA_REWBHILABK-WERT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REWBHILABK 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_REWBHILABK 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_REWBHILABK INTO WA_REWBHILABK.


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

*Conversion exit CUNIT, internal->external for field EWERT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REWBHILABK-EWERT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REWBHILABK-EWERT.
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_REWBHILABK_STR, 
SWBNR TYPE STRING,
SWBIND TYPE STRING,
AUFWGRP TYPE STRING,
XAUFWGRP TYPE STRING,
AUFWART TYPE STRING,
XAUFWART TYPE STRING,
ZUDAT TYPE STRING,
RGUEBIS TYPE STRING,
ANZMEAUFW TYPE STRING,
ANZMEWB TYPE STRING,
WERT TYPE STRING,
EWERT TYPE STRING,
BBETRAG TYPE STRING,
BWAEHRUNG TYPE STRING,
JBETRAG TYPE STRING,
RMBETRAG TYPE STRING,
MBETRAG_PRO_EINH TYPE STRING,
MAW TYPE STRING,
RMBETRAGM TYPE STRING,
AUFWSTAT TYPE STRING,
AUTOWERTYN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REWBHILABK_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_REWBHILABK_STR-SWBNR sy-vline 
WA_REWBHILABK_STR-SWBIND sy-vline 
WA_REWBHILABK_STR-AUFWGRP sy-vline 
WA_REWBHILABK_STR-XAUFWGRP sy-vline 
WA_REWBHILABK_STR-AUFWART sy-vline 
WA_REWBHILABK_STR-XAUFWART sy-vline 
WA_REWBHILABK_STR-ZUDAT sy-vline 
WA_REWBHILABK_STR-RGUEBIS sy-vline 
WA_REWBHILABK_STR-ANZMEAUFW sy-vline 
WA_REWBHILABK_STR-ANZMEWB sy-vline 
WA_REWBHILABK_STR-WERT sy-vline 
WA_REWBHILABK_STR-EWERT sy-vline 
WA_REWBHILABK_STR-BBETRAG sy-vline 
WA_REWBHILABK_STR-BWAEHRUNG sy-vline 
WA_REWBHILABK_STR-JBETRAG sy-vline 
WA_REWBHILABK_STR-RMBETRAG sy-vline 
WA_REWBHILABK_STR-MBETRAG_PRO_EINH sy-vline 
WA_REWBHILABK_STR-MAW sy-vline 
WA_REWBHILABK_STR-RMBETRAGM sy-vline 
WA_REWBHILABK_STR-AUFWSTAT sy-vline 
WA_REWBHILABK_STR-AUTOWERTYN sy-vline      INTO ld_text SEPARATED BY SPACE.

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