ABAP Select data from SAP table ISCUSTOMCDSVIEWPARAMETER_D into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISCUSTOMCDSVIEWPARAMETER_D
*  INTO TABLE @DATA(IT_ISCUSTOMCDSVIEWPARAMETER_D2).
*--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_ISCUSTOMCDSVIEWPARAMETER_D INDEX 1 INTO DATA(WA_ISCUSTOMCDSVIEWPARAMETER_D2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISCUSTOMCDSVIEWPARAMETER_D>-ENTITY_NAME = 1.
<ISCUSTOMCDSVIEWPARAMETER_D>-PARAM_UUID = 1.
<ISCUSTOMCDSVIEWPARAMETER_D>-COUNTER = 1.
<ISCUSTOMCDSVIEWPARAMETER_D>-PARAMETER_NAME = 1.
<ISCUSTOMCDSVIEWPARAMETER_D>-PARAMETER_LABEL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISCUSTOMCDSVIEWPARAMETER_D-DATA_ELEMENT, sy-vline,
  WA_ISCUSTOMCDSVIEWPARAMETER_D-DDIC_TYPE, sy-vline,
  WA_ISCUSTOMCDSVIEWPARAMETER_D-LENGTH, sy-vline,
  WA_ISCUSTOMCDSVIEWPARAMETER_D-DECIMALS, sy-vline,
  WA_ISCUSTOMCDSVIEWPARAMETER_D-ORIGIN_CODE, sy-vline,
  WA_ISCUSTOMCDSVIEWPARAMETER_D-HIDDEN_IND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISCUSTOMCDSVIEWPARAMETER_D 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_ISCUSTOMCDSVIEWPARAMETER_D 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_ISCUSTOMCDSVIEWPARAMETER_D INTO WA_ISCUSTOMCDSVIEWPARAMETER_D.


*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_ISCUSTOMCDSVIEWPARAMETER_D_STR, 
ENTITY_NAME TYPE STRING,
PARAM_UUID TYPE STRING,
COUNTER TYPE STRING,
PARAMETER_NAME TYPE STRING,
PARAMETER_LABEL TYPE STRING,
DATA_ELEMENT TYPE STRING,
DDIC_TYPE TYPE STRING,
LENGTH TYPE STRING,
DECIMALS TYPE STRING,
ORIGIN_CODE TYPE STRING,
HIDDEN_IND TYPE STRING,
DEFAULT_VAL_TYPE TYPE STRING,
DEFAULT_VAL_SYSTEM TYPE STRING,
DEFAULT_VAL_MANUAL TYPE STRING,
SEMANTICS_ANNOTATION TYPE STRING,
SEMANTICS_VALUE TYPE STRING,
SOURCE_DATA_SOURCE_UUID TYPE STRING,
SOURCE_PARAMETER_NAME TYPE STRING,
HASACTIVEENTITY TYPE STRING,
DRAFTENTITYCREATIONDATETIME TYPE STRING,
DRAFTENTITYLASTCHANGEDATETIME TYPE STRING,
DRAFTADMINISTRATIVEDATAUUID TYPE STRING,
DRAFTENTITYCONSISTENCYSTATUS TYPE STRING,
DRAFTENTITYOPERATIONCODE TYPE STRING,
ISACTIVEENTITY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISCUSTOMCDSVIEWPARAMETER_D_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_ISCUSTOMCDSVIEWPARAMETER_D_STR-ENTITY_NAME sy-vline 
WA_ISCUSTOMCDSVIEWPARAMETER_D_STR-PARAM_UUID sy-vline 
WA_ISCUSTOMCDSVIEWPARAMETER_D_STR-COUNTER sy-vline 
WA_ISCUSTOMCDSVIEWPARAMETER_D_STR-PARAMETER_NAME sy-vline 
WA_ISCUSTOMCDSVIEWPARAMETER_D_STR-PARAMETER_LABEL sy-vline 
WA_ISCUSTOMCDSVIEWPARAMETER_D_STR-DATA_ELEMENT sy-vline 
WA_ISCUSTOMCDSVIEWPARAMETER_D_STR-DDIC_TYPE sy-vline 
WA_ISCUSTOMCDSVIEWPARAMETER_D_STR-LENGTH sy-vline 
WA_ISCUSTOMCDSVIEWPARAMETER_D_STR-DECIMALS sy-vline 
WA_ISCUSTOMCDSVIEWPARAMETER_D_STR-ORIGIN_CODE sy-vline 
WA_ISCUSTOMCDSVIEWPARAMETER_D_STR-HIDDEN_IND sy-vline 
WA_ISCUSTOMCDSVIEWPARAMETER_D_STR-DEFAULT_VAL_TYPE sy-vline 
WA_ISCUSTOMCDSVIEWPARAMETER_D_STR-DEFAULT_VAL_SYSTEM sy-vline 
WA_ISCUSTOMCDSVIEWPARAMETER_D_STR-DEFAULT_VAL_MANUAL sy-vline 
WA_ISCUSTOMCDSVIEWPARAMETER_D_STR-SEMANTICS_ANNOTATION sy-vline 
WA_ISCUSTOMCDSVIEWPARAMETER_D_STR-SEMANTICS_VALUE sy-vline 
WA_ISCUSTOMCDSVIEWPARAMETER_D_STR-SOURCE_DATA_SOURCE_UUID sy-vline 
WA_ISCUSTOMCDSVIEWPARAMETER_D_STR-SOURCE_PARAMETER_NAME sy-vline 
WA_ISCUSTOMCDSVIEWPARAMETER_D_STR-HASACTIVEENTITY sy-vline 
WA_ISCUSTOMCDSVIEWPARAMETER_D_STR-DRAFTENTITYCREATIONDATETIME sy-vline 
WA_ISCUSTOMCDSVIEWPARAMETER_D_STR-DRAFTENTITYLASTCHANGEDATETIME sy-vline 
WA_ISCUSTOMCDSVIEWPARAMETER_D_STR-DRAFTADMINISTRATIVEDATAUUID sy-vline 
WA_ISCUSTOMCDSVIEWPARAMETER_D_STR-DRAFTENTITYCONSISTENCYSTATUS sy-vline 
WA_ISCUSTOMCDSVIEWPARAMETER_D_STR-DRAFTENTITYOPERATIONCODE sy-vline 
WA_ISCUSTOMCDSVIEWPARAMETER_D_STR-ISACTIVEENTITY sy-vline      INTO ld_text SEPARATED BY SPACE.

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