ABAP Select data from SAP table P_CFD_FIELD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P_CFD_FIELD
*  INTO TABLE @DATA(IT_P_CFD_FIELD2).
*--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_P_CFD_FIELD INDEX 1 INTO DATA(WA_P_CFD_FIELD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P_CFD_FIELD>-EXTERNALNAME = 1.
<P_CFD_FIELD>-BUSINESSCONTEXT = 1.
<P_CFD_FIELD>-NAME = 1.
<P_CFD_FIELD>-VERSION = 1.
<P_CFD_FIELD>-TECHNICALNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P_CFD_FIELD-FIELDLABEL, sy-vline,
  WA_P_CFD_FIELD-EXTERNALSTATUS, sy-vline,
  WA_P_CFD_FIELD-ISDRAFT, sy-vline,
  WA_P_CFD_FIELD-INTERNALTYPE, sy-vline,
  WA_P_CFD_FIELD-TYPE, sy-vline,
  WA_P_CFD_FIELD-LENGTH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P_CFD_FIELD 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_P_CFD_FIELD 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_P_CFD_FIELD INTO WA_P_CFD_FIELD.


*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 DTYPE, internal->external for field DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_P_CFD_FIELD-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P_CFD_FIELD-DATATYPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field MASTERLANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_P_CFD_FIELD-MASTERLANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P_CFD_FIELD-MASTERLANGUAGE.
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_P_CFD_FIELD_STR, 
EXTERNALNAME TYPE STRING,
BUSINESSCONTEXT TYPE STRING,
NAME TYPE STRING,
VERSION TYPE STRING,
TECHNICALNAME TYPE STRING,
FIELDLABEL TYPE STRING,
EXTERNALSTATUS TYPE STRING,
ISDRAFT TYPE STRING,
INTERNALTYPE TYPE STRING,
TYPE TYPE STRING,
LENGTH TYPE STRING,
SCALE TYPE STRING,
DATATYPE TYPE STRING,
ORIGIN TYPE STRING,
HASNEVERBEENPUBLISHED TYPE STRING,
MASTERLANGUAGE TYPE STRING,
AGGREGATION TYPE STRING,
DATAELEMENTNAME TYPE STRING,
VALUEHELPVIEWNAME TYPE STRING,
DISPLAYOPTION TYPE STRING,
CREATEDAT TYPE STRING,
CREATEDBY TYPE STRING,
LASTCHANGEDAT TYPE STRING,
LASTCHANGEDBY TYPE STRING,
ASSOCIATEDBUSINESSOBJECT TYPE STRING,
ASSOCIATEDBODESCRIPTION TYPE STRING,
CHARACTERISTICNAME TYPE STRING,
CLASSTYPE TYPE STRING,
CLASSIFICATIONOBJECTTYPE TYPE STRING,
CODELISTUPPERCASEONLY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P_CFD_FIELD_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_P_CFD_FIELD_STR-EXTERNALNAME sy-vline 
WA_P_CFD_FIELD_STR-BUSINESSCONTEXT sy-vline 
WA_P_CFD_FIELD_STR-NAME sy-vline 
WA_P_CFD_FIELD_STR-VERSION sy-vline 
WA_P_CFD_FIELD_STR-TECHNICALNAME sy-vline 
WA_P_CFD_FIELD_STR-FIELDLABEL sy-vline 
WA_P_CFD_FIELD_STR-EXTERNALSTATUS sy-vline 
WA_P_CFD_FIELD_STR-ISDRAFT sy-vline 
WA_P_CFD_FIELD_STR-INTERNALTYPE sy-vline 
WA_P_CFD_FIELD_STR-TYPE sy-vline 
WA_P_CFD_FIELD_STR-LENGTH sy-vline 
WA_P_CFD_FIELD_STR-SCALE sy-vline 
WA_P_CFD_FIELD_STR-DATATYPE sy-vline 
WA_P_CFD_FIELD_STR-ORIGIN sy-vline 
WA_P_CFD_FIELD_STR-HASNEVERBEENPUBLISHED sy-vline 
WA_P_CFD_FIELD_STR-MASTERLANGUAGE sy-vline 
WA_P_CFD_FIELD_STR-AGGREGATION sy-vline 
WA_P_CFD_FIELD_STR-DATAELEMENTNAME sy-vline 
WA_P_CFD_FIELD_STR-VALUEHELPVIEWNAME sy-vline 
WA_P_CFD_FIELD_STR-DISPLAYOPTION sy-vline 
WA_P_CFD_FIELD_STR-CREATEDAT sy-vline 
WA_P_CFD_FIELD_STR-CREATEDBY sy-vline 
WA_P_CFD_FIELD_STR-LASTCHANGEDAT sy-vline 
WA_P_CFD_FIELD_STR-LASTCHANGEDBY sy-vline 
WA_P_CFD_FIELD_STR-ASSOCIATEDBUSINESSOBJECT sy-vline 
WA_P_CFD_FIELD_STR-ASSOCIATEDBODESCRIPTION sy-vline 
WA_P_CFD_FIELD_STR-CHARACTERISTICNAME sy-vline 
WA_P_CFD_FIELD_STR-CLASSTYPE sy-vline 
WA_P_CFD_FIELD_STR-CLASSIFICATIONOBJECTTYPE sy-vline 
WA_P_CFD_FIELD_STR-CODELISTUPPERCASEONLY sy-vline      INTO ld_text SEPARATED BY SPACE.

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