ABAP Select data from SAP table DFKKBIXCIT_DCL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKBIXCIT_DCL
*  INTO TABLE @DATA(IT_DFKKBIXCIT_DCL2).
*--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_DFKKBIXCIT_DCL INDEX 1 INTO DATA(WA_DFKKBIXCIT_DCL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKBIXCIT_DCL>-MANDT = 1.
<DFKKBIXCIT_DCL>-DCSCHEMA = 1.
<DFKKBIXCIT_DCL>-CITCAT = 1.
<DFKKBIXCIT_DCL>-LOGMONTH = 1.
<DFKKBIXCIT_DCL>-LOGUUID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKBIXCIT_DCL-CITCRMONTH, sy-vline,
  WA_DFKKBIXCIT_DCL-DCDBTAB, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_DFKKBIXCIT_DCL 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_DFKKBIXCIT_DCL 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_DFKKBIXCIT_DCL INTO WA_DFKKBIXCIT_DCL.


*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 PERI, internal->external for field LOGMONTH
CALL FUNCTION 'CONVERSION_EXIT_PERI_OUTPUT'
  EXPORTING
    input =                      WA_DFKKBIXCIT_DCL-LOGMONTH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKBIXCIT_DCL-LOGMONTH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI, internal->external for field CITCRMONTH
CALL FUNCTION 'CONVERSION_EXIT_PERI_OUTPUT'
  EXPORTING
    input =                      WA_DFKKBIXCIT_DCL-CITCRMONTH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKBIXCIT_DCL-CITCRMONTH.
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_DFKKBIXCIT_DCL_STR, 
MANDT TYPE STRING,
DCSCHEMA TYPE STRING,
CITCAT TYPE STRING,
LOGMONTH TYPE STRING,
LOGUUID TYPE STRING,
CITCRMONTH TYPE STRING,
DCDBTAB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKBIXCIT_DCL_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_DFKKBIXCIT_DCL_STR-MANDT sy-vline 
WA_DFKKBIXCIT_DCL_STR-DCSCHEMA sy-vline 
WA_DFKKBIXCIT_DCL_STR-CITCAT sy-vline 
WA_DFKKBIXCIT_DCL_STR-LOGMONTH sy-vline 
WA_DFKKBIXCIT_DCL_STR-LOGUUID sy-vline 
WA_DFKKBIXCIT_DCL_STR-CITCRMONTH sy-vline 
WA_DFKKBIXCIT_DCL_STR-DCDBTAB sy-vline      INTO ld_text SEPARATED BY SPACE.

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