ABAP Select data from SAP table KCDDIFIE into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KCDDIFIE 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 KCDDIFIE. 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 KCDDIFIE 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_KCDDIFIE TYPE STANDARD TABLE OF KCDDIFIE,
      WA_KCDDIFIE TYPE KCDDIFIE,
      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: <KCDDIFIE> TYPE KCDDIFIE.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KCDDIFIE
*  INTO TABLE @DATA(IT_KCDDIFIE2).
*--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_KCDDIFIE INDEX 1 INTO DATA(WA_KCDDIFIE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KCDDIFIE>-TABNM = 1.
<KCDDIFIE>-FIENM = 1.
<KCDDIFIE>-USGFL = 1.
<KCDDIFIE>-ROLNM = 1.
<KCDDIFIE>-DOMNM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KCDDIFIE-KEYFL, sy-vline,
  WA_KCDDIFIE-CHTAB, sy-vline,
  WA_KCDDIFIE-CHFIE, sy-vline,
  WA_KCDDIFIE-ENTAB, sy-vline,
  WA_KCDDIFIE-VALEX, sy-vline,
  WA_KCDDIFIE-FIXVL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KCDDIFIE 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_KCDDIFIE 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_KCDDIFIE INTO WA_KCDDIFIE.


*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 DTYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_KCDDIFIE-DTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KCDDIFIE-DTYPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UNIT0
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_KCDDIFIE-UNIT0
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KCDDIFIE-UNIT0.
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_KCDDIFIE_STR, 
TABNM TYPE STRING,
FIENM TYPE STRING,
USGFL TYPE STRING,
ROLNM TYPE STRING,
DOMNM TYPE STRING,
KEYFL TYPE STRING,
CHTAB TYPE STRING,
CHFIE TYPE STRING,
ENTAB TYPE STRING,
VALEX TYPE STRING,
FIXVL TYPE STRING,
RETAB TYPE STRING,
REFIE TYPE STRING,
REFIL TYPE STRING,
REFLL TYPE STRING,
POSIT TYPE STRING,
DTYPE TYPE STRING,
ITYPE TYPE STRING,
ILENG TYPE STRING,
OFFST TYPE STRING,
DIGIT TYPE STRING,
OUTLN TYPE STRING,
DECIM TYPE STRING,
RFTAB TYPE STRING,
RFFIE TYPE STRING,
DSRFF TYPE STRING,
CQMRK TYPE STRING,
CUKY0 TYPE STRING,
CQFIE TYPE STRING,
UNIT0 TYPE STRING,
PARID TYPE STRING,
CONVX TYPE STRING,
TXT_S TYPE STRING,
TXT_M TYPE STRING,
TXT_L TYPE STRING,
TXT_R TYPE STRING,
CHNAM TYPE STRING,
CHDAT TYPE STRING,
CHTIM TYPE STRING,
LOWCS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KCDDIFIE_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_KCDDIFIE_STR-TABNM sy-vline 
WA_KCDDIFIE_STR-FIENM sy-vline 
WA_KCDDIFIE_STR-USGFL sy-vline 
WA_KCDDIFIE_STR-ROLNM sy-vline 
WA_KCDDIFIE_STR-DOMNM sy-vline 
WA_KCDDIFIE_STR-KEYFL sy-vline 
WA_KCDDIFIE_STR-CHTAB sy-vline 
WA_KCDDIFIE_STR-CHFIE sy-vline 
WA_KCDDIFIE_STR-ENTAB sy-vline 
WA_KCDDIFIE_STR-VALEX sy-vline 
WA_KCDDIFIE_STR-FIXVL sy-vline 
WA_KCDDIFIE_STR-RETAB sy-vline 
WA_KCDDIFIE_STR-REFIE sy-vline 
WA_KCDDIFIE_STR-REFIL sy-vline 
WA_KCDDIFIE_STR-REFLL sy-vline 
WA_KCDDIFIE_STR-POSIT sy-vline 
WA_KCDDIFIE_STR-DTYPE sy-vline 
WA_KCDDIFIE_STR-ITYPE sy-vline 
WA_KCDDIFIE_STR-ILENG sy-vline 
WA_KCDDIFIE_STR-OFFST sy-vline 
WA_KCDDIFIE_STR-DIGIT sy-vline 
WA_KCDDIFIE_STR-OUTLN sy-vline 
WA_KCDDIFIE_STR-DECIM sy-vline 
WA_KCDDIFIE_STR-RFTAB sy-vline 
WA_KCDDIFIE_STR-RFFIE sy-vline 
WA_KCDDIFIE_STR-DSRFF sy-vline 
WA_KCDDIFIE_STR-CQMRK sy-vline 
WA_KCDDIFIE_STR-CUKY0 sy-vline 
WA_KCDDIFIE_STR-CQFIE sy-vline 
WA_KCDDIFIE_STR-UNIT0 sy-vline 
WA_KCDDIFIE_STR-PARID sy-vline 
WA_KCDDIFIE_STR-CONVX sy-vline 
WA_KCDDIFIE_STR-TXT_S sy-vline 
WA_KCDDIFIE_STR-TXT_M sy-vline 
WA_KCDDIFIE_STR-TXT_L sy-vline 
WA_KCDDIFIE_STR-TXT_R sy-vline 
WA_KCDDIFIE_STR-CHNAM sy-vline 
WA_KCDDIFIE_STR-CHDAT sy-vline 
WA_KCDDIFIE_STR-CHTIM sy-vline 
WA_KCDDIFIE_STR-LOWCS sy-vline      INTO ld_text SEPARATED BY SPACE.

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