ABAP Select data from SAP table /KYK/ISS_COS_3 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /KYK/ISS_COS_3 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 /KYK/ISS_COS_3. 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 /KYK/ISS_COS_3 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_/KYK/ISS_COS_3 TYPE STANDARD TABLE OF /KYK/ISS_COS_3,
      WA_/KYK/ISS_COS_3 TYPE /KYK/ISS_COS_3,
      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: </KYK/ISS_COS_3> TYPE /KYK/ISS_COS_3.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/KYK/ISS_COS_3.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /KYK/ISS_COS_3
  INTO TABLE IT_/KYK/ISS_COS_3.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /KYK/ISS_COS_3
*  INTO TABLE @DATA(IT_/KYK/ISS_COS_32).
*--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_/KYK/ISS_COS_3 INDEX 1 INTO DATA(WA_/KYK/ISS_COS_32).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/KYK/ISS_COS_3 ASSIGNING </KYK/ISS_COS_3>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</KYK/ISS_COS_3>-KOSTL = 1.
</KYK/ISS_COS_3>-KSTGR = 1.
</KYK/ISS_COS_3>-LSTAR = 1.
</KYK/ISS_COS_3>-KSTAR = 1.
</KYK/ISS_COS_3>-KOAGR = 1.

ENDLOOP.

LOOP AT IT_/KYK/ISS_COS_3 INTO WA_/KYK/ISS_COS_3.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/KYK/ISS_COS_3-MEINH, sy-vline,
  WA_/KYK/ISS_COS_3-PLANMENG_G, sy-vline,
  WA_/KYK/ISS_COS_3-ISTMENG_G, sy-vline,
  WA_/KYK/ISS_COS_3-PLANKOST_G, sy-vline,
  WA_/KYK/ISS_COS_3-ISTKOST_G, sy-vline,
  WA_/KYK/ISS_COS_3-PLIS_KOST_A, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/KYK/ISS_COS_3 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_/KYK/ISS_COS_3 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_/KYK/ISS_COS_3 INTO WA_/KYK/ISS_COS_3.


*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 KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/KYK/ISS_COS_3-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KYK/ISS_COS_3-KOSTL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KSTAR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/KYK/ISS_COS_3-KSTAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KYK/ISS_COS_3-KSTAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/KYK/ISS_COS_3-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KYK/ISS_COS_3-MEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/KYK/ISS_COS_3-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/KYK/ISS_COS_3-MEINS.
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_/KYK/ISS_COS_3_STR, 
KOSTL TYPE STRING,
KSTGR TYPE STRING,
LSTAR TYPE STRING,
KSTAR TYPE STRING,
KOAGR TYPE STRING,
MEINH TYPE STRING,
PLANMENG_G TYPE STRING,
ISTMENG_G TYPE STRING,
PLANKOST_G TYPE STRING,
ISTKOST_G TYPE STRING,
PLIS_KOST_A TYPE STRING,
PLIS_KOST_P TYPE STRING,
PLIS_MENG_A TYPE STRING,
PLIS_MENG_P TYPE STRING,
ISTMENGE TYPE STRING,
PLANMENGE TYPE STRING,
WAERS TYPE STRING,
MEINS TYPE STRING,
PLIS_MENG_OA TYPE STRING,
PLIS_MENG_OP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/KYK/ISS_COS_3_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_/KYK/ISS_COS_3_STR-KOSTL sy-vline 
WA_/KYK/ISS_COS_3_STR-KSTGR sy-vline 
WA_/KYK/ISS_COS_3_STR-LSTAR sy-vline 
WA_/KYK/ISS_COS_3_STR-KSTAR sy-vline 
WA_/KYK/ISS_COS_3_STR-KOAGR sy-vline 
WA_/KYK/ISS_COS_3_STR-MEINH sy-vline 
WA_/KYK/ISS_COS_3_STR-PLANMENG_G sy-vline 
WA_/KYK/ISS_COS_3_STR-ISTMENG_G sy-vline 
WA_/KYK/ISS_COS_3_STR-PLANKOST_G sy-vline 
WA_/KYK/ISS_COS_3_STR-ISTKOST_G sy-vline 
WA_/KYK/ISS_COS_3_STR-PLIS_KOST_A sy-vline 
WA_/KYK/ISS_COS_3_STR-PLIS_KOST_P sy-vline 
WA_/KYK/ISS_COS_3_STR-PLIS_MENG_A sy-vline 
WA_/KYK/ISS_COS_3_STR-PLIS_MENG_P sy-vline 
WA_/KYK/ISS_COS_3_STR-ISTMENGE sy-vline 
WA_/KYK/ISS_COS_3_STR-PLANMENGE sy-vline 
WA_/KYK/ISS_COS_3_STR-WAERS sy-vline 
WA_/KYK/ISS_COS_3_STR-MEINS sy-vline 
WA_/KYK/ISS_COS_3_STR-PLIS_MENG_OA sy-vline 
WA_/KYK/ISS_COS_3_STR-PLIS_MENG_OP sy-vline      INTO ld_text SEPARATED BY SPACE.

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