ABAP Select data from SAP table FKKL8_CTR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FKKL8_CTR 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 FKKL8_CTR. 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 FKKL8_CTR 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_FKKL8_CTR TYPE STANDARD TABLE OF FKKL8_CTR,
      WA_FKKL8_CTR TYPE FKKL8_CTR,
      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: <FKKL8_CTR> TYPE FKKL8_CTR.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_FKKL8_CTR.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM FKKL8_CTR
  INTO TABLE IT_FKKL8_CTR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKL8_CTR
*  INTO TABLE @DATA(IT_FKKL8_CTR2).
*--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_FKKL8_CTR INDEX 1 INTO DATA(WA_FKKL8_CTR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_FKKL8_CTR ASSIGNING <FKKL8_CTR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKL8_CTR>-XPAYMENTS = 1.
<FKKL8_CTR>-GPART = 1.
<FKKL8_CTR>-VKONT = 1.
<FKKL8_CTR>-VTREF = 1.
<FKKL8_CTR>-SUBAP = 1.

ENDLOOP.

LOOP AT IT_FKKL8_CTR INTO WA_FKKL8_CTR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKL8_CTR-BUKRS, sy-vline,
  WA_FKKL8_CTR-DUE_DATE_LOW, sy-vline,
  WA_FKKL8_CTR-DUE_DATE_HIGH, sy-vline,
  WA_FKKL8_CTR-NOLST, sy-vline,
  WA_FKKL8_CTR-ANZWA, sy-vline,
  WA_FKKL8_CTR-XEBPP_ACTIV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKL8_CTR 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_FKKL8_CTR 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_FKKL8_CTR INTO WA_FKKL8_CTR.


*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 GPART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKL8_CTR-GPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKL8_CTR-GPART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKL8_CTR-VKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKL8_CTR-VKONT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VTREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKL8_CTR-VTREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKL8_CTR-VTREF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field XBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKL8_CTR-XBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKL8_CTR-XBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OPBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKL8_CTR-OPBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKL8_CTR-OPBEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PPKEY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKL8_CTR-PPKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKL8_CTR-PPKEY.
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_FKKL8_CTR_STR, 
XPAYMENTS TYPE STRING,
GPART TYPE STRING,
VKONT TYPE STRING,
VTREF TYPE STRING,
SUBAP TYPE STRING,
BUKRS TYPE STRING,
DUE_DATE_LOW TYPE STRING,
DUE_DATE_HIGH TYPE STRING,
NOLST TYPE STRING,
ANZWA TYPE STRING,
XEBPP_ACTIV TYPE STRING,
XEBPP_OPEN_ITEMS TYPE STRING,
XEBPP_CLEARED_ITEMS TYPE STRING,
XEBPP_XPREV TYPE STRING,
PRATP TYPE STRING,
XBLNR TYPE STRING,
OPORD TYPE STRING,
ISFCC TYPE STRING,
DISPLAY_CURRENCY TYPE STRING,
OPBEL TYPE STRING,
CMGRP TYPE STRING,
ONLYO TYPE STRING,
ALLCR TYPE STRING,
DOC_DATE_LOW TYPE STRING,
DOC_DATE_HIGH TYPE STRING,
CALLED_BY_SERVICE TYPE STRING,
DUE_UNTIL TYPE STRING,
CLEARED_SINCE TYPE STRING,
SKIP_ARCHIVE TYPE STRING,
PPKEY TYPE STRING,
CALLED_BY_MCF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKL8_CTR_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_FKKL8_CTR_STR-XPAYMENTS sy-vline 
WA_FKKL8_CTR_STR-GPART sy-vline 
WA_FKKL8_CTR_STR-VKONT sy-vline 
WA_FKKL8_CTR_STR-VTREF sy-vline 
WA_FKKL8_CTR_STR-SUBAP sy-vline 
WA_FKKL8_CTR_STR-BUKRS sy-vline 
WA_FKKL8_CTR_STR-DUE_DATE_LOW sy-vline 
WA_FKKL8_CTR_STR-DUE_DATE_HIGH sy-vline 
WA_FKKL8_CTR_STR-NOLST sy-vline 
WA_FKKL8_CTR_STR-ANZWA sy-vline 
WA_FKKL8_CTR_STR-XEBPP_ACTIV sy-vline 
WA_FKKL8_CTR_STR-XEBPP_OPEN_ITEMS sy-vline 
WA_FKKL8_CTR_STR-XEBPP_CLEARED_ITEMS sy-vline 
WA_FKKL8_CTR_STR-XEBPP_XPREV sy-vline 
WA_FKKL8_CTR_STR-PRATP sy-vline 
WA_FKKL8_CTR_STR-XBLNR sy-vline 
WA_FKKL8_CTR_STR-OPORD sy-vline 
WA_FKKL8_CTR_STR-ISFCC sy-vline 
WA_FKKL8_CTR_STR-DISPLAY_CURRENCY sy-vline 
WA_FKKL8_CTR_STR-OPBEL sy-vline 
WA_FKKL8_CTR_STR-CMGRP sy-vline 
WA_FKKL8_CTR_STR-ONLYO sy-vline 
WA_FKKL8_CTR_STR-ALLCR sy-vline 
WA_FKKL8_CTR_STR-DOC_DATE_LOW sy-vline 
WA_FKKL8_CTR_STR-DOC_DATE_HIGH sy-vline 
WA_FKKL8_CTR_STR-CALLED_BY_SERVICE sy-vline 
WA_FKKL8_CTR_STR-DUE_UNTIL sy-vline 
WA_FKKL8_CTR_STR-CLEARED_SINCE sy-vline 
WA_FKKL8_CTR_STR-SKIP_ARCHIVE sy-vline 
WA_FKKL8_CTR_STR-PPKEY sy-vline 
WA_FKKL8_CTR_STR-CALLED_BY_MCF sy-vline      INTO ld_text SEPARATED BY SPACE.

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