ABAP Select data from SAP table GLPOS_C_DEB_CT_KNKK into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GLPOS_C_DEB_CT_KNKK
*  INTO TABLE @DATA(IT_GLPOS_C_DEB_CT_KNKK2).
*--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_GLPOS_C_DEB_CT_KNKK INDEX 1 INTO DATA(WA_GLPOS_C_DEB_CT_KNKK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GLPOS_C_DEB_CT_KNKK>-KNKK_KLIMK = 1.
<GLPOS_C_DEB_CT_KNKK>-KNKK_KNKLI = 1.
<GLPOS_C_DEB_CT_KNKK>-KNKK_SAUFT = 1.
<GLPOS_C_DEB_CT_KNKK>-KNKK_SKFOR = 1.
<GLPOS_C_DEB_CT_KNKK>-KNKK_SSOBL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GLPOS_C_DEB_CT_KNKK-KNKK_UEDAT, sy-vline,
  WA_GLPOS_C_DEB_CT_KNKK-KNKK_XCHNG, sy-vline,
  WA_GLPOS_C_DEB_CT_KNKK-KNKK_ERNAM, sy-vline,
  WA_GLPOS_C_DEB_CT_KNKK-KNKK_ERDAT, sy-vline,
  WA_GLPOS_C_DEB_CT_KNKK-KNKK_CTLPC, sy-vline,
  WA_GLPOS_C_DEB_CT_KNKK-KNKK_DTREV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GLPOS_C_DEB_CT_KNKK 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_GLPOS_C_DEB_CT_KNKK 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_GLPOS_C_DEB_CT_KNKK INTO WA_GLPOS_C_DEB_CT_KNKK.


*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 AU152, internal->external for field KNKK_KLIMK
CALL FUNCTION 'CONVERSION_EXIT_AU152_OUTPUT'
  EXPORTING
    input =                      WA_GLPOS_C_DEB_CT_KNKK-KNKK_KLIMK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLPOS_C_DEB_CT_KNKK-KNKK_KLIMK.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit AU132, internal->external for field KNKK_CASHA
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_GLPOS_C_DEB_CT_KNKK-KNKK_CASHA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLPOS_C_DEB_CT_KNKK-KNKK_CASHA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU152, internal->external for field KNKK_DBEKR
CALL FUNCTION 'CONVERSION_EXIT_AU152_OUTPUT'
  EXPORTING
    input =                      WA_GLPOS_C_DEB_CT_KNKK-KNKK_DBEKR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLPOS_C_DEB_CT_KNKK-KNKK_DBEKR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field KNKK_ABSBT
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_GLPOS_C_DEB_CT_KNKK-KNKK_ABSBT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GLPOS_C_DEB_CT_KNKK-KNKK_ABSBT.
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_GLPOS_C_DEB_CT_KNKK_STR, 
KNKK_KLIMK TYPE STRING,
KNKK_KNKLI TYPE STRING,
KNKK_SAUFT TYPE STRING,
KNKK_SKFOR TYPE STRING,
KNKK_SSOBL TYPE STRING,
KNKK_UEDAT TYPE STRING,
KNKK_XCHNG TYPE STRING,
KNKK_ERNAM TYPE STRING,
KNKK_ERDAT TYPE STRING,
KNKK_CTLPC TYPE STRING,
KNKK_DTREV TYPE STRING,
KNKK_CRBLB TYPE STRING,
KNKK_SBGRP TYPE STRING,
KNKK_NXTRV TYPE STRING,
KNKK_KRAUS TYPE STRING,
KNKK_PAYDB TYPE STRING,
KNKK_DBRAT TYPE STRING,
KNKK_REVDB TYPE STRING,
KNKK_AEDAT TYPE STRING,
KNKK_AETXT TYPE STRING,
KNKK_GRUPP TYPE STRING,
KNKK_AENAM TYPE STRING,
KNKK_SBDAT TYPE STRING,
KNKK_KDGRP TYPE STRING,
KNKK_CASHD TYPE STRING,
KNKK_CASHA TYPE STRING,
KNKK_CASHC TYPE STRING,
KNKK_DBPAY TYPE STRING,
KNKK_DBRTG TYPE STRING,
KNKK_DBEKR TYPE STRING,
KNKK_DBWAE TYPE STRING,
KNKK_DBMON TYPE STRING,
KNKK_ABSBT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GLPOS_C_DEB_CT_KNKK_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_GLPOS_C_DEB_CT_KNKK_STR-KNKK_KLIMK sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_KNKLI sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_SAUFT sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_SKFOR sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_SSOBL sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_UEDAT sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_XCHNG sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_ERNAM sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_ERDAT sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_CTLPC sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_DTREV sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_CRBLB sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_SBGRP sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_NXTRV sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_KRAUS sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_PAYDB sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_DBRAT sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_REVDB sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_AEDAT sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_AETXT sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_GRUPP sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_AENAM sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_SBDAT sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_KDGRP sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_CASHD sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_CASHA sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_CASHC sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_DBPAY sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_DBRTG sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_DBEKR sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_DBWAE sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_DBMON sy-vline 
WA_GLPOS_C_DEB_CT_KNKK_STR-KNKK_ABSBT sy-vline      INTO ld_text SEPARATED BY SPACE.

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