ABAP Select data from SAP table CFD_W_ODATA_CTXT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CFD_W_ODATA_CTXT
*  INTO TABLE @DATA(IT_CFD_W_ODATA_CTXT2).
*--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_CFD_W_ODATA_CTXT INDEX 1 INTO DATA(WA_CFD_W_ODATA_CTXT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CFD_W_ODATA_CTXT>-MODEL_NAME = 1.
<CFD_W_ODATA_CTXT>-ENTITY_NAME = 1.
<CFD_W_ODATA_CTXT>-BUSINESS_CONTEXT = 1.
<CFD_W_ODATA_CTXT>-UNION_SUFFIX = 1.
<CFD_W_ODATA_CTXT>-ROLE_SUFFIX = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CFD_W_ODATA_CTXT-RELEASE_STATUS, sy-vline,
  WA_CFD_W_ODATA_CTXT-IMPLEMENTATION_TYPE, sy-vline,
  WA_CFD_W_ODATA_CTXT-ROLE_TEXT_DATA_ELEMENT, sy-vline,
  WA_CFD_W_ODATA_CTXT-ROLE_FIELDS_INCLUDE, sy-vline,
  WA_CFD_W_ODATA_CTXT-CDS_VIEW_NAME, sy-vline,
  WA_CFD_W_ODATA_CTXT-BASIC_SEARCH_SUPPORT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CFD_W_ODATA_CTXT 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_CFD_W_ODATA_CTXT 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_CFD_W_ODATA_CTXT INTO WA_CFD_W_ODATA_CTXT.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_CFD_W_ODATA_CTXT_STR, 
MODEL_NAME TYPE STRING,
ENTITY_NAME TYPE STRING,
BUSINESS_CONTEXT TYPE STRING,
UNION_SUFFIX TYPE STRING,
ROLE_SUFFIX TYPE STRING,
RELEASE_STATUS TYPE STRING,
IMPLEMENTATION_TYPE TYPE STRING,
ROLE_TEXT_DATA_ELEMENT TYPE STRING,
ROLE_FIELDS_INCLUDE TYPE STRING,
CDS_VIEW_NAME TYPE STRING,
BASIC_SEARCH_SUPPORT TYPE STRING,
FILTER_SUPPORT TYPE STRING,
UNION_FIELDS_INCLUDE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CFD_W_ODATA_CTXT_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_CFD_W_ODATA_CTXT_STR-MODEL_NAME sy-vline 
WA_CFD_W_ODATA_CTXT_STR-ENTITY_NAME sy-vline 
WA_CFD_W_ODATA_CTXT_STR-BUSINESS_CONTEXT sy-vline 
WA_CFD_W_ODATA_CTXT_STR-UNION_SUFFIX sy-vline 
WA_CFD_W_ODATA_CTXT_STR-ROLE_SUFFIX sy-vline 
WA_CFD_W_ODATA_CTXT_STR-RELEASE_STATUS sy-vline 
WA_CFD_W_ODATA_CTXT_STR-IMPLEMENTATION_TYPE sy-vline 
WA_CFD_W_ODATA_CTXT_STR-ROLE_TEXT_DATA_ELEMENT sy-vline 
WA_CFD_W_ODATA_CTXT_STR-ROLE_FIELDS_INCLUDE sy-vline 
WA_CFD_W_ODATA_CTXT_STR-CDS_VIEW_NAME sy-vline 
WA_CFD_W_ODATA_CTXT_STR-BASIC_SEARCH_SUPPORT sy-vline 
WA_CFD_W_ODATA_CTXT_STR-FILTER_SUPPORT sy-vline 
WA_CFD_W_ODATA_CTXT_STR-UNION_FIELDS_INCLUDE sy-vline      INTO ld_text SEPARATED BY SPACE.

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