ABAP Select data from SAP table ICFDCUSTOMFIELD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICFDCUSTOMFIELD
*  INTO TABLE @DATA(IT_ICFDCUSTOMFIELD2).
*--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_ICFDCUSTOMFIELD INDEX 1 INTO DATA(WA_ICFDCUSTOMFIELD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICFDCUSTOMFIELD>-CUSTOMFIELDNAME = 1.
<ICFDCUSTOMFIELD>-FIELDSTATUS = 1.
<ICFDCUSTOMFIELD>-EXTERNALNAME = 1.
<ICFDCUSTOMFIELD>-VERSION = 1.
<ICFDCUSTOMFIELD>-FIELDTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICFDCUSTOMFIELD-FIELDLENGTH, sy-vline,
  WA_ICFDCUSTOMFIELD-FIELDSCALE, sy-vline,
  WA_ICFDCUSTOMFIELD-AGGREGATION, sy-vline,
  WA_ICFDCUSTOMFIELD-FIELDLABEL, sy-vline,
  WA_ICFDCUSTOMFIELD-TOOLTIP, sy-vline,
  WA_ICFDCUSTOMFIELD-CREATEDBY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICFDCUSTOMFIELD 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_ICFDCUSTOMFIELD 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_ICFDCUSTOMFIELD INTO WA_ICFDCUSTOMFIELD.


*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_ICFDCUSTOMFIELD_STR, 
CUSTOMFIELDNAME TYPE STRING,
FIELDSTATUS TYPE STRING,
EXTERNALNAME TYPE STRING,
VERSION TYPE STRING,
FIELDTYPE TYPE STRING,
FIELDLENGTH TYPE STRING,
FIELDSCALE TYPE STRING,
AGGREGATION TYPE STRING,
FIELDLABEL TYPE STRING,
TOOLTIP TYPE STRING,
CREATEDBY TYPE STRING,
CREATEDON TYPE STRING,
CREATEDAT TYPE STRING,
LASTCHANGEDBY TYPE STRING,
LASTCHANGEDON TYPE STRING,
LASTCHANGEDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICFDCUSTOMFIELD_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_ICFDCUSTOMFIELD_STR-CUSTOMFIELDNAME sy-vline 
WA_ICFDCUSTOMFIELD_STR-FIELDSTATUS sy-vline 
WA_ICFDCUSTOMFIELD_STR-EXTERNALNAME sy-vline 
WA_ICFDCUSTOMFIELD_STR-VERSION sy-vline 
WA_ICFDCUSTOMFIELD_STR-FIELDTYPE sy-vline 
WA_ICFDCUSTOMFIELD_STR-FIELDLENGTH sy-vline 
WA_ICFDCUSTOMFIELD_STR-FIELDSCALE sy-vline 
WA_ICFDCUSTOMFIELD_STR-AGGREGATION sy-vline 
WA_ICFDCUSTOMFIELD_STR-FIELDLABEL sy-vline 
WA_ICFDCUSTOMFIELD_STR-TOOLTIP sy-vline 
WA_ICFDCUSTOMFIELD_STR-CREATEDBY sy-vline 
WA_ICFDCUSTOMFIELD_STR-CREATEDON sy-vline 
WA_ICFDCUSTOMFIELD_STR-CREATEDAT sy-vline 
WA_ICFDCUSTOMFIELD_STR-LASTCHANGEDBY sy-vline 
WA_ICFDCUSTOMFIELD_STR-LASTCHANGEDON sy-vline 
WA_ICFDCUSTOMFIELD_STR-LASTCHANGEDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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