ABAP Select data from SAP table /ATL/KPCC_LOG into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /ATL/KPCC_LOG 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 /ATL/KPCC_LOG. 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 /ATL/KPCC_LOG 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_/ATL/KPCC_LOG TYPE STANDARD TABLE OF /ATL/KPCC_LOG,
      WA_/ATL/KPCC_LOG TYPE /ATL/KPCC_LOG,
      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: </ATL/KPCC_LOG> TYPE /ATL/KPCC_LOG.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /ATL/KPCC_LOG
  INTO TABLE IT_/ATL/KPCC_LOG.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /ATL/KPCC_LOG
*  INTO TABLE @DATA(IT_/ATL/KPCC_LOG2).
*--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_/ATL/KPCC_LOG INDEX 1 INTO DATA(WA_/ATL/KPCC_LOG2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/ATL/KPCC_LOG ASSIGNING </ATL/KPCC_LOG>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</ATL/KPCC_LOG>-MANDT = 1.
</ATL/KPCC_LOG>-REFNO = 1.
</ATL/KPCC_LOG>-ZPAYER_NO = 1.
</ATL/KPCC_LOG>-ZLIFNR_NO = 1.
</ATL/KPCC_LOG>-ZHKONT_NO = 1.

ENDLOOP.

LOOP AT IT_/ATL/KPCC_LOG INTO WA_/ATL/KPCC_LOG.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/ATL/KPCC_LOG-REQ_FILENAME, sy-vline,
  WA_/ATL/KPCC_LOG-ZLINE, sy-vline,
  WA_/ATL/KPCC_LOG-REQUEST, sy-vline,
  WA_/ATL/KPCC_LOG-ANS_FILENAME, sy-vline,
  WA_/ATL/KPCC_LOG-ZSTATUS, sy-vline,
  WA_/ATL/KPCC_LOG-FILLER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/ATL/KPCC_LOG 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_/ATL/KPCC_LOG 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_/ATL/KPCC_LOG INTO WA_/ATL/KPCC_LOG.


*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 ZPAYER_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/ATL/KPCC_LOG-ZPAYER_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ATL/KPCC_LOG-ZPAYER_NO.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field ZHKONT_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/ATL/KPCC_LOG-ZHKONT_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ATL/KPCC_LOG-ZHKONT_NO.
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_/ATL/KPCC_LOG_STR, 
MANDT TYPE STRING,
REFNO TYPE STRING,
ZPAYER_NO TYPE STRING,
ZLIFNR_NO TYPE STRING,
ZHKONT_NO TYPE STRING,
REQ_FILENAME TYPE STRING,
ZLINE TYPE STRING,
REQUEST TYPE STRING,
ANS_FILENAME TYPE STRING,
ZSTATUS TYPE STRING,
FILLER TYPE STRING,
ZCRDNUM TYPE STRING,
CCBRAND TYPE STRING,
CLEARID TYPE STRING,
SERVCOD TYPE STRING,
ZPARAM TYPE STRING,
ZVALDAT TYPE STRING,
IDNUM_9ST TYPE STRING,
CVVCVST TYPE STRING,
ZAMOUNT TYPE STRING,
FILLER2 TYPE STRING,
STAR_AMOUNT TYPE STRING,
CLEARID1 TYPE STRING,
ZDEALTYPE TYPE STRING,
ZCRDTYP TYPE STRING,
FILLER3 TYPE STRING,
ZCURR TYPE STRING,
ZDOTYPE TYPE STRING,
MOADON TYPE STRING,
ZAKNRES TYPE STRING,
ZAKNBY TYPE STRING,
ZAKNNO TYPE STRING,
ZFIRSTPM TYPE STRING,
ZRESTPM TYPE STRING,
ZCRDPAY TYPE STRING,
ZNUMFILE TYPE STRING,
ZKPNO TYPE STRING,
ZNUMKP TYPE STRING,
ZCRDNAM TYPE STRING,
TURISTFL TYPE STRING,
REFERENCE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/ATL/KPCC_LOG_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_/ATL/KPCC_LOG_STR-MANDT sy-vline 
WA_/ATL/KPCC_LOG_STR-REFNO sy-vline 
WA_/ATL/KPCC_LOG_STR-ZPAYER_NO sy-vline 
WA_/ATL/KPCC_LOG_STR-ZLIFNR_NO sy-vline 
WA_/ATL/KPCC_LOG_STR-ZHKONT_NO sy-vline 
WA_/ATL/KPCC_LOG_STR-REQ_FILENAME sy-vline 
WA_/ATL/KPCC_LOG_STR-ZLINE sy-vline 
WA_/ATL/KPCC_LOG_STR-REQUEST sy-vline 
WA_/ATL/KPCC_LOG_STR-ANS_FILENAME sy-vline 
WA_/ATL/KPCC_LOG_STR-ZSTATUS sy-vline 
WA_/ATL/KPCC_LOG_STR-FILLER sy-vline 
WA_/ATL/KPCC_LOG_STR-ZCRDNUM sy-vline 
WA_/ATL/KPCC_LOG_STR-CCBRAND sy-vline 
WA_/ATL/KPCC_LOG_STR-CLEARID sy-vline 
WA_/ATL/KPCC_LOG_STR-SERVCOD sy-vline 
WA_/ATL/KPCC_LOG_STR-ZPARAM sy-vline 
WA_/ATL/KPCC_LOG_STR-ZVALDAT sy-vline 
WA_/ATL/KPCC_LOG_STR-IDNUM_9ST sy-vline 
WA_/ATL/KPCC_LOG_STR-CVVCVST sy-vline 
WA_/ATL/KPCC_LOG_STR-ZAMOUNT sy-vline 
WA_/ATL/KPCC_LOG_STR-FILLER2 sy-vline 
WA_/ATL/KPCC_LOG_STR-STAR_AMOUNT sy-vline 
WA_/ATL/KPCC_LOG_STR-CLEARID1 sy-vline 
WA_/ATL/KPCC_LOG_STR-ZDEALTYPE sy-vline 
WA_/ATL/KPCC_LOG_STR-ZCRDTYP sy-vline 
WA_/ATL/KPCC_LOG_STR-FILLER3 sy-vline 
WA_/ATL/KPCC_LOG_STR-ZCURR sy-vline 
WA_/ATL/KPCC_LOG_STR-ZDOTYPE sy-vline 
WA_/ATL/KPCC_LOG_STR-MOADON sy-vline 
WA_/ATL/KPCC_LOG_STR-ZAKNRES sy-vline 
WA_/ATL/KPCC_LOG_STR-ZAKNBY sy-vline 
WA_/ATL/KPCC_LOG_STR-ZAKNNO sy-vline 
WA_/ATL/KPCC_LOG_STR-ZFIRSTPM sy-vline 
WA_/ATL/KPCC_LOG_STR-ZRESTPM sy-vline 
WA_/ATL/KPCC_LOG_STR-ZCRDPAY sy-vline 
WA_/ATL/KPCC_LOG_STR-ZNUMFILE sy-vline 
WA_/ATL/KPCC_LOG_STR-ZKPNO sy-vline 
WA_/ATL/KPCC_LOG_STR-ZNUMKP sy-vline 
WA_/ATL/KPCC_LOG_STR-ZCRDNAM sy-vline 
WA_/ATL/KPCC_LOG_STR-TURISTFL sy-vline 
WA_/ATL/KPCC_LOG_STR-REFERENCE sy-vline      INTO ld_text SEPARATED BY SPACE.

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