ABAP Select data from SAP table CWB_CONTEXT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CWB_CONTEXT
*  INTO TABLE @DATA(IT_CWB_CONTEXT2).
*--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_CWB_CONTEXT INDEX 1 INTO DATA(WA_CWB_CONTEXT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CWB_CONTEXT>-CONTEXT = 1.
<CWB_CONTEXT>-MATNR = 1.
<CWB_CONTEXT>-WERKS = 1.
<CWB_CONTEXT>-STLTY = 1.
<CWB_CONTEXT>-STLNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CWB_CONTEXT-STLAL, sy-vline,
  WA_CWB_CONTEXT-STLAN, sy-vline,
  WA_CWB_CONTEXT-STLKN, sy-vline,
  WA_CWB_CONTEXT-EXSTL, sy-vline,
  WA_CWB_CONTEXT-IDENT_ITM, sy-vline,
  WA_CWB_CONTEXT-CAPID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CWB_CONTEXT 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_CWB_CONTEXT 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_CWB_CONTEXT INTO WA_CWB_CONTEXT.


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

*Conversion exit NUMCV, internal->external for field STLNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_CWB_CONTEXT-STLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CWB_CONTEXT-STLNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_CWB_CONTEXT-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CWB_CONTEXT-VORNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field UVORN
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_CWB_CONTEXT-UVORN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CWB_CONTEXT-UVORN.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit NUMCV, internal->external for field POSNR_ITM
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_CWB_CONTEXT-POSNR_ITM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CWB_CONTEXT-POSNR_ITM.
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_CWB_CONTEXT_STR, 
CONTEXT TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
STLTY TYPE STRING,
STLNR TYPE STRING,
STLAL TYPE STRING,
STLAN TYPE STRING,
STLKN TYPE STRING,
EXSTL TYPE STRING,
IDENT_ITM TYPE STRING,
CAPID TYPE STRING,
TETYP TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNAL TYPE STRING,
PLNFL TYPE STRING,
VORNR TYPE STRING,
UVORN TYPE STRING,
IDENT_REF TYPE STRING,
IDENT TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
PZLFH TYPE STRING,
KZEINSTELL TYPE STRING,
MERKNR TYPE STRING,
ZUORDNR TYPE STRING,
BGR_MODE TYPE STRING,
BOMOB TYPE STRING,
BOM_TXT TYPE STRING,
KTEXT TYPE STRING,
LTXA1 TYPE STRING,
LTXA1_OPR TYPE STRING,
KTEXT_ITM TYPE STRING,
MAKTX TYPE STRING,
POSNR_ITM TYPE STRING,
POSTP_ITM TYPE STRING,
TGR_MODE TYPE STRING,
KTEXT_CHA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CWB_CONTEXT_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_CWB_CONTEXT_STR-CONTEXT sy-vline 
WA_CWB_CONTEXT_STR-MATNR sy-vline 
WA_CWB_CONTEXT_STR-WERKS sy-vline 
WA_CWB_CONTEXT_STR-STLTY sy-vline 
WA_CWB_CONTEXT_STR-STLNR sy-vline 
WA_CWB_CONTEXT_STR-STLAL sy-vline 
WA_CWB_CONTEXT_STR-STLAN sy-vline 
WA_CWB_CONTEXT_STR-STLKN sy-vline 
WA_CWB_CONTEXT_STR-EXSTL sy-vline 
WA_CWB_CONTEXT_STR-IDENT_ITM sy-vline 
WA_CWB_CONTEXT_STR-CAPID sy-vline 
WA_CWB_CONTEXT_STR-TETYP sy-vline 
WA_CWB_CONTEXT_STR-PLNTY sy-vline 
WA_CWB_CONTEXT_STR-PLNNR sy-vline 
WA_CWB_CONTEXT_STR-PLNAL sy-vline 
WA_CWB_CONTEXT_STR-PLNFL sy-vline 
WA_CWB_CONTEXT_STR-VORNR sy-vline 
WA_CWB_CONTEXT_STR-UVORN sy-vline 
WA_CWB_CONTEXT_STR-IDENT_REF sy-vline 
WA_CWB_CONTEXT_STR-IDENT sy-vline 
WA_CWB_CONTEXT_STR-VBELN sy-vline 
WA_CWB_CONTEXT_STR-POSNR sy-vline 
WA_CWB_CONTEXT_STR-PZLFH sy-vline 
WA_CWB_CONTEXT_STR-KZEINSTELL sy-vline 
WA_CWB_CONTEXT_STR-MERKNR sy-vline 
WA_CWB_CONTEXT_STR-ZUORDNR sy-vline 
WA_CWB_CONTEXT_STR-BGR_MODE sy-vline 
WA_CWB_CONTEXT_STR-BOMOB sy-vline 
WA_CWB_CONTEXT_STR-BOM_TXT sy-vline 
WA_CWB_CONTEXT_STR-KTEXT sy-vline 
WA_CWB_CONTEXT_STR-LTXA1 sy-vline 
WA_CWB_CONTEXT_STR-LTXA1_OPR sy-vline 
WA_CWB_CONTEXT_STR-KTEXT_ITM sy-vline 
WA_CWB_CONTEXT_STR-MAKTX sy-vline 
WA_CWB_CONTEXT_STR-POSNR_ITM sy-vline 
WA_CWB_CONTEXT_STR-POSTP_ITM sy-vline 
WA_CWB_CONTEXT_STR-TGR_MODE sy-vline 
WA_CWB_CONTEXT_STR-KTEXT_CHA sy-vline      INTO ld_text SEPARATED BY SPACE.

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