ABAP Select data from SAP table KPEP_WL_OS_DATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KPEP_WL_OS_DATA
*  INTO TABLE @DATA(IT_KPEP_WL_OS_DATA2).
*--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_KPEP_WL_OS_DATA INDEX 1 INTO DATA(WA_KPEP_WL_OS_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KPEP_WL_OS_DATA>-STAT001 = 1.
<KPEP_WL_OS_DATA>-STAT002 = 1.
<KPEP_WL_OS_DATA>-STAT003 = 1.
<KPEP_WL_OS_DATA>-STAT004 = 1.
<KPEP_WL_OS_DATA>-STAT005 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KPEP_WL_OS_DATA-STAT006, sy-vline,
  WA_KPEP_WL_OS_DATA-STAT007, sy-vline,
  WA_KPEP_WL_OS_DATA-STAT008, sy-vline,
  WA_KPEP_WL_OS_DATA-STAT009, sy-vline,
  WA_KPEP_WL_OS_DATA-STAT010, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_KPEP_WL_OS_DATA 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_KPEP_WL_OS_DATA 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_KPEP_WL_OS_DATA INTO WA_KPEP_WL_OS_DATA.


*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 KWOST, internal->external for field STAT001
CALL FUNCTION 'CONVERSION_EXIT_KWOST_OUTPUT'
  EXPORTING
    input =                      WA_KPEP_WL_OS_DATA-STAT001
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPEP_WL_OS_DATA-STAT001.
WRITE:/ 'New Value:', ld_input.

*Conversion exit KWOST, internal->external for field STAT002
CALL FUNCTION 'CONVERSION_EXIT_KWOST_OUTPUT'
  EXPORTING
    input =                      WA_KPEP_WL_OS_DATA-STAT002
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPEP_WL_OS_DATA-STAT002.
WRITE:/ 'New Value:', ld_input.

*Conversion exit KWOST, internal->external for field STAT003
CALL FUNCTION 'CONVERSION_EXIT_KWOST_OUTPUT'
  EXPORTING
    input =                      WA_KPEP_WL_OS_DATA-STAT003
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPEP_WL_OS_DATA-STAT003.
WRITE:/ 'New Value:', ld_input.

*Conversion exit KWOST, internal->external for field STAT004
CALL FUNCTION 'CONVERSION_EXIT_KWOST_OUTPUT'
  EXPORTING
    input =                      WA_KPEP_WL_OS_DATA-STAT004
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPEP_WL_OS_DATA-STAT004.
WRITE:/ 'New Value:', ld_input.

*Conversion exit KWOST, internal->external for field STAT005
CALL FUNCTION 'CONVERSION_EXIT_KWOST_OUTPUT'
  EXPORTING
    input =                      WA_KPEP_WL_OS_DATA-STAT005
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPEP_WL_OS_DATA-STAT005.
WRITE:/ 'New Value:', ld_input.

*Conversion exit KWOST, internal->external for field STAT006
CALL FUNCTION 'CONVERSION_EXIT_KWOST_OUTPUT'
  EXPORTING
    input =                      WA_KPEP_WL_OS_DATA-STAT006
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPEP_WL_OS_DATA-STAT006.
WRITE:/ 'New Value:', ld_input.

*Conversion exit KWOST, internal->external for field STAT007
CALL FUNCTION 'CONVERSION_EXIT_KWOST_OUTPUT'
  EXPORTING
    input =                      WA_KPEP_WL_OS_DATA-STAT007
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPEP_WL_OS_DATA-STAT007.
WRITE:/ 'New Value:', ld_input.

*Conversion exit KWOST, internal->external for field STAT008
CALL FUNCTION 'CONVERSION_EXIT_KWOST_OUTPUT'
  EXPORTING
    input =                      WA_KPEP_WL_OS_DATA-STAT008
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPEP_WL_OS_DATA-STAT008.
WRITE:/ 'New Value:', ld_input.

*Conversion exit KWOST, internal->external for field STAT009
CALL FUNCTION 'CONVERSION_EXIT_KWOST_OUTPUT'
  EXPORTING
    input =                      WA_KPEP_WL_OS_DATA-STAT009
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPEP_WL_OS_DATA-STAT009.
WRITE:/ 'New Value:', ld_input.

*Conversion exit KWOST, internal->external for field STAT010
CALL FUNCTION 'CONVERSION_EXIT_KWOST_OUTPUT'
  EXPORTING
    input =                      WA_KPEP_WL_OS_DATA-STAT010
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KPEP_WL_OS_DATA-STAT010.
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_KPEP_WL_OS_DATA_STR, 
STAT001 TYPE STRING,
STAT002 TYPE STRING,
STAT003 TYPE STRING,
STAT004 TYPE STRING,
STAT005 TYPE STRING,
STAT006 TYPE STRING,
STAT007 TYPE STRING,
STAT008 TYPE STRING,
STAT009 TYPE STRING,
STAT010 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KPEP_WL_OS_DATA_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_KPEP_WL_OS_DATA_STR-STAT001 sy-vline 
WA_KPEP_WL_OS_DATA_STR-STAT002 sy-vline 
WA_KPEP_WL_OS_DATA_STR-STAT003 sy-vline 
WA_KPEP_WL_OS_DATA_STR-STAT004 sy-vline 
WA_KPEP_WL_OS_DATA_STR-STAT005 sy-vline 
WA_KPEP_WL_OS_DATA_STR-STAT006 sy-vline 
WA_KPEP_WL_OS_DATA_STR-STAT007 sy-vline 
WA_KPEP_WL_OS_DATA_STR-STAT008 sy-vline 
WA_KPEP_WL_OS_DATA_STR-STAT009 sy-vline 
WA_KPEP_WL_OS_DATA_STR-STAT010 sy-vline      INTO ld_text SEPARATED BY SPACE.

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