ABAP Select data from SAP table CFD_W_CDS 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_CDS 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_CDS. 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_CDS 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_CDS TYPE STANDARD TABLE OF CFD_W_CDS,
      WA_CFD_W_CDS TYPE CFD_W_CDS,
      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_CDS> TYPE CFD_W_CDS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CFD_W_CDS
*  INTO TABLE @DATA(IT_CFD_W_CDS2).
*--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_CDS INDEX 1 INTO DATA(WA_CFD_W_CDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CFD_W_CDS>-CDS_VIEW_NAME = 1.
<CFD_W_CDS>-AVAILABILITY = 1.
<CFD_W_CDS>-RELEASE_STATUS = 1.
<CFD_W_CDS>-SUPPORTED_FEATURES = 1.
<CFD_W_CDS>-TEXT_CLASSIFICATION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CFD_W_CDS-VIEW_TYPE, sy-vline,
  WA_CFD_W_CDS-BASED_ON_UNDERLYING_VIEW, sy-vline,
  WA_CFD_W_CDS-BASIC_SEARCH_SUPPORT, sy-vline,
  WA_CFD_W_CDS-HAS_GROUP_BY, sy-vline,
  WA_CFD_W_CDS-HAS_UNION, sy-vline,
  WA_CFD_W_CDS-HAS_DEFAULT_AGGREGATION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CFD_W_CDS 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_CDS 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_CDS INTO WA_CFD_W_CDS.


*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_CDS_STR, 
CDS_VIEW_NAME TYPE STRING,
AVAILABILITY TYPE STRING,
RELEASE_STATUS TYPE STRING,
SUPPORTED_FEATURES TYPE STRING,
TEXT_CLASSIFICATION TYPE STRING,
VIEW_TYPE TYPE STRING,
BASED_ON_UNDERLYING_VIEW TYPE STRING,
BASIC_SEARCH_SUPPORT TYPE STRING,
HAS_GROUP_BY TYPE STRING,
HAS_UNION TYPE STRING,
HAS_DEFAULT_AGGREGATION TYPE STRING,
IS_ANALYTICAL_QUERY TYPE STRING,
HAS_DATACATEGORY_CUBE TYPE STRING,
IS_REDIRECT_VIEW TYPE STRING,
LANGUAGE_PARAMETER TYPE STRING,
BEHAVIOR_DEFINITION TYPE STRING,
BEHAVIOR_ENTITY_ALIAS TYPE STRING,
DET_VAL_SUPPORTED TYPE STRING,
HAS_DRAFT TYPE STRING,
USAGE_ENTERPRISE_SEARCH TYPE STRING,
USAGE_UI_REPORT TYPE STRING,
USAGE_EMAIL_TEMPLATE TYPE STRING,
USAGE_API TYPE STRING,
USAGE_INVISIBLE TYPE STRING,
BADI_DEFINITION_FOR_HIDDEN TYPE STRING,
ENTITY_IMPORT_PARAMETER_STRUC TYPE STRING,
BADI_ADDITIONAL_DATA_CLASS TYPE STRING,
RELEASE_STATUS_DE TYPE STRING,
USE_ASSOCIATION TYPE STRING,
USE_UNDERLYING_ASSOCIATIONS TYPE STRING,
USE_UNDERLYING_FIELDS TYPE STRING,
UNDERLYING_VIEW_ALIAS TYPE STRING,
UNDERLYING_VIEW_NAME TYPE STRING,
USAGE_INVISIBLE_DE TYPE STRING,
CREATED_BY TYPE STRING,
CREATED_ON TYPE STRING,
CREATED_AT TYPE STRING,
LAST_CHANGED_BY TYPE STRING,
LAST_CHANGED_ON TYPE STRING,
LAST_CHANGED_AT TYPE STRING,
DRAFT_UNION_DATASOURCE_ALIAS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CFD_W_CDS_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_CDS_STR-CDS_VIEW_NAME sy-vline 
WA_CFD_W_CDS_STR-AVAILABILITY sy-vline 
WA_CFD_W_CDS_STR-RELEASE_STATUS sy-vline 
WA_CFD_W_CDS_STR-SUPPORTED_FEATURES sy-vline 
WA_CFD_W_CDS_STR-TEXT_CLASSIFICATION sy-vline 
WA_CFD_W_CDS_STR-VIEW_TYPE sy-vline 
WA_CFD_W_CDS_STR-BASED_ON_UNDERLYING_VIEW sy-vline 
WA_CFD_W_CDS_STR-BASIC_SEARCH_SUPPORT sy-vline 
WA_CFD_W_CDS_STR-HAS_GROUP_BY sy-vline 
WA_CFD_W_CDS_STR-HAS_UNION sy-vline 
WA_CFD_W_CDS_STR-HAS_DEFAULT_AGGREGATION sy-vline 
WA_CFD_W_CDS_STR-IS_ANALYTICAL_QUERY sy-vline 
WA_CFD_W_CDS_STR-HAS_DATACATEGORY_CUBE sy-vline 
WA_CFD_W_CDS_STR-IS_REDIRECT_VIEW sy-vline 
WA_CFD_W_CDS_STR-LANGUAGE_PARAMETER sy-vline 
WA_CFD_W_CDS_STR-BEHAVIOR_DEFINITION sy-vline 
WA_CFD_W_CDS_STR-BEHAVIOR_ENTITY_ALIAS sy-vline 
WA_CFD_W_CDS_STR-DET_VAL_SUPPORTED sy-vline 
WA_CFD_W_CDS_STR-HAS_DRAFT sy-vline 
WA_CFD_W_CDS_STR-USAGE_ENTERPRISE_SEARCH sy-vline 
WA_CFD_W_CDS_STR-USAGE_UI_REPORT sy-vline 
WA_CFD_W_CDS_STR-USAGE_EMAIL_TEMPLATE sy-vline 
WA_CFD_W_CDS_STR-USAGE_API sy-vline 
WA_CFD_W_CDS_STR-USAGE_INVISIBLE sy-vline 
WA_CFD_W_CDS_STR-BADI_DEFINITION_FOR_HIDDEN sy-vline 
WA_CFD_W_CDS_STR-ENTITY_IMPORT_PARAMETER_STRUC sy-vline 
WA_CFD_W_CDS_STR-BADI_ADDITIONAL_DATA_CLASS sy-vline 
WA_CFD_W_CDS_STR-RELEASE_STATUS_DE sy-vline 
WA_CFD_W_CDS_STR-USE_ASSOCIATION sy-vline 
WA_CFD_W_CDS_STR-USE_UNDERLYING_ASSOCIATIONS sy-vline 
WA_CFD_W_CDS_STR-USE_UNDERLYING_FIELDS sy-vline 
WA_CFD_W_CDS_STR-UNDERLYING_VIEW_ALIAS sy-vline 
WA_CFD_W_CDS_STR-UNDERLYING_VIEW_NAME sy-vline 
WA_CFD_W_CDS_STR-USAGE_INVISIBLE_DE sy-vline 
WA_CFD_W_CDS_STR-CREATED_BY sy-vline 
WA_CFD_W_CDS_STR-CREATED_ON sy-vline 
WA_CFD_W_CDS_STR-CREATED_AT sy-vline 
WA_CFD_W_CDS_STR-LAST_CHANGED_BY sy-vline 
WA_CFD_W_CDS_STR-LAST_CHANGED_ON sy-vline 
WA_CFD_W_CDS_STR-LAST_CHANGED_AT sy-vline 
WA_CFD_W_CDS_STR-DRAFT_UNION_DATASOURCE_ALIAS sy-vline      INTO ld_text SEPARATED BY SPACE.

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