ABAP Select data from SAP table RFDKLI_KNC1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFDKLI_KNC1 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 RFDKLI_KNC1. 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 RFDKLI_KNC1 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_RFDKLI_KNC1 TYPE STANDARD TABLE OF RFDKLI_KNC1,
      WA_RFDKLI_KNC1 TYPE RFDKLI_KNC1,
      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: <RFDKLI_KNC1> TYPE RFDKLI_KNC1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RFDKLI_KNC1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RFDKLI_KNC1
  INTO TABLE IT_RFDKLI_KNC1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFDKLI_KNC1
*  INTO TABLE @DATA(IT_RFDKLI_KNC12).
*--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_RFDKLI_KNC1 INDEX 1 INTO DATA(WA_RFDKLI_KNC12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RFDKLI_KNC1 ASSIGNING <RFDKLI_KNC1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFDKLI_KNC1>-KUNNR = 1.
<RFDKLI_KNC1>-BUKRS = 1.
<RFDKLI_KNC1>-BUTXT = 1.
<RFDKLI_KNC1>-WAERS = 1.
<RFDKLI_KNC1>-SALDO = 1.

ENDLOOP.

LOOP AT IT_RFDKLI_KNC1 INTO WA_RFDKLI_KNC1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFDKLI_KNC1-H06SA, sy-vline,
  WA_RFDKLI_KNC1-H06MO, sy-vline,
  WA_RFDKLI_KNC1-H06JA, sy-vline,
  WA_RFDKLI_KNC1-H12SA, sy-vline,
  WA_RFDKLI_KNC1-H12MO, sy-vline,
  WA_RFDKLI_KNC1-H12JA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFDKLI_KNC1 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_RFDKLI_KNC1 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_RFDKLI_KNC1 INTO WA_RFDKLI_KNC1.


*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 ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFDKLI_KNC1-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDKLI_KNC1-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field SALDO
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_RFDKLI_KNC1-SALDO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDKLI_KNC1-SALDO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field H06SA
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_RFDKLI_KNC1-H06SA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDKLI_KNC1-H06SA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field H06JA
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RFDKLI_KNC1-H06JA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDKLI_KNC1-H06JA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field H12SA
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_RFDKLI_KNC1-H12SA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDKLI_KNC1-H12SA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field H12JA
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RFDKLI_KNC1-H12JA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDKLI_KNC1-H12JA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field UMP1U
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_RFDKLI_KNC1-UMP1U
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDKLI_KNC1-UMP1U.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field UMP2U
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_RFDKLI_KNC1-UMP2U
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFDKLI_KNC1-UMP2U.
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_RFDKLI_KNC1_STR, 
KUNNR TYPE STRING,
BUKRS TYPE STRING,
BUTXT TYPE STRING,
WAERS TYPE STRING,
SALDO TYPE STRING,
H06SA TYPE STRING,
H06MO TYPE STRING,
H06JA TYPE STRING,
H12SA TYPE STRING,
H12MO TYPE STRING,
H12JA TYPE STRING,
UMP1U TYPE STRING,
UMP2U TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFDKLI_KNC1_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_RFDKLI_KNC1_STR-KUNNR sy-vline 
WA_RFDKLI_KNC1_STR-BUKRS sy-vline 
WA_RFDKLI_KNC1_STR-BUTXT sy-vline 
WA_RFDKLI_KNC1_STR-WAERS sy-vline 
WA_RFDKLI_KNC1_STR-SALDO sy-vline 
WA_RFDKLI_KNC1_STR-H06SA sy-vline 
WA_RFDKLI_KNC1_STR-H06MO sy-vline 
WA_RFDKLI_KNC1_STR-H06JA sy-vline 
WA_RFDKLI_KNC1_STR-H12SA sy-vline 
WA_RFDKLI_KNC1_STR-H12MO sy-vline 
WA_RFDKLI_KNC1_STR-H12JA sy-vline 
WA_RFDKLI_KNC1_STR-UMP1U sy-vline 
WA_RFDKLI_KNC1_STR-UMP2U sy-vline      INTO ld_text SEPARATED BY SPACE.

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