ABAP Select data from SAP table REBW_CODATA_CST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REBW_CODATA_CST
*  INTO TABLE @DATA(IT_REBW_CODATA_CST2).
*--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_REBW_CODATA_CST INDEX 1 INTO DATA(WA_REBW_CODATA_CST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REBW_CODATA_CST>-FISCVAR = 1.
<REBW_CODATA_CST>-FISCPER = 1.
<REBW_CODATA_CST>-KOKRS = 1.
<REBW_CODATA_CST>-BUKRS = 1.
<REBW_CODATA_CST>-REOBJ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REBW_CODATA_CST-SWENR, sy-vline,
  WA_REBW_CODATA_CST-SGENR, sy-vline,
  WA_REBW_CODATA_CST-SGRNR, sy-vline,
  WA_REBW_CODATA_CST-SMENR, sy-vline,
  WA_REBW_CODATA_CST-SMIVE, sy-vline,
  WA_REBW_CODATA_CST-WRTTP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REBW_CODATA_CST 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_REBW_CODATA_CST 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_REBW_CODATA_CST INTO WA_REBW_CODATA_CST.


*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 PERI7, internal->external for field FISCPER
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_REBW_CODATA_CST-FISCPER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REBW_CODATA_CST-FISCPER.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

*Conversion exit CUNIT, internal->external for field MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REBW_CODATA_CST-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REBW_CODATA_CST-MEINH.
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_REBW_CODATA_CST_STR, 
FISCVAR TYPE STRING,
FISCPER TYPE STRING,
KOKRS TYPE STRING,
BUKRS TYPE STRING,
REOBJ TYPE STRING,
SWENR TYPE STRING,
SGENR TYPE STRING,
SGRNR TYPE STRING,
SMENR TYPE STRING,
SMIVE TYPE STRING,
WRTTP TYPE STRING,
VTYPE TYPE STRING,
VTDETAIL TYPE STRING,
VTSTAT TYPE STRING,
VERSN TYPE STRING,
KSTAR TYPE STRING,
SEKNZ TYPE STRING,
RSPOBART TYPE STRING,
RSPAROBVAL TYPE STRING,
VALUTYP TYPE STRING,
MEASTYPE TYPE STRING,
SWG TYPE STRING,
SMEG TYPE STRING,
WAERS TYPE STRING,
CURTYPE TYPE STRING,
MEINH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REBW_CODATA_CST_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_REBW_CODATA_CST_STR-FISCVAR sy-vline 
WA_REBW_CODATA_CST_STR-FISCPER sy-vline 
WA_REBW_CODATA_CST_STR-KOKRS sy-vline 
WA_REBW_CODATA_CST_STR-BUKRS sy-vline 
WA_REBW_CODATA_CST_STR-REOBJ sy-vline 
WA_REBW_CODATA_CST_STR-SWENR sy-vline 
WA_REBW_CODATA_CST_STR-SGENR sy-vline 
WA_REBW_CODATA_CST_STR-SGRNR sy-vline 
WA_REBW_CODATA_CST_STR-SMENR sy-vline 
WA_REBW_CODATA_CST_STR-SMIVE sy-vline 
WA_REBW_CODATA_CST_STR-WRTTP sy-vline 
WA_REBW_CODATA_CST_STR-VTYPE sy-vline 
WA_REBW_CODATA_CST_STR-VTDETAIL sy-vline 
WA_REBW_CODATA_CST_STR-VTSTAT sy-vline 
WA_REBW_CODATA_CST_STR-VERSN sy-vline 
WA_REBW_CODATA_CST_STR-KSTAR sy-vline 
WA_REBW_CODATA_CST_STR-SEKNZ sy-vline 
WA_REBW_CODATA_CST_STR-RSPOBART sy-vline 
WA_REBW_CODATA_CST_STR-RSPAROBVAL sy-vline 
WA_REBW_CODATA_CST_STR-VALUTYP sy-vline 
WA_REBW_CODATA_CST_STR-MEASTYPE sy-vline 
WA_REBW_CODATA_CST_STR-SWG sy-vline 
WA_REBW_CODATA_CST_STR-SMEG sy-vline 
WA_REBW_CODATA_CST_STR-WAERS sy-vline 
WA_REBW_CODATA_CST_STR-CURTYPE sy-vline 
WA_REBW_CODATA_CST_STR-MEINH sy-vline      INTO ld_text SEPARATED BY SPACE.

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