ABAP Select data from SAP table KSEL_COVP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KSEL_COVP
*  INTO TABLE @DATA(IT_KSEL_COVP2).
*--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_KSEL_COVP INDEX 1 INTO DATA(WA_KSEL_COVP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KSEL_COVP>-VRGNG = 1.
<KSEL_COVP>-BLDAT = 1.
<KSEL_COVP>-USNAM = 1.
<KSEL_COVP>-BLTXT = 1.
<KSEL_COVP>-STFLG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KSEL_COVP-STOKZ, sy-vline,
  WA_KSEL_COVP-REFBT, sy-vline,
  WA_KSEL_COVP-REFBN, sy-vline,
  WA_KSEL_COVP-REFBK, sy-vline,
  WA_KSEL_COVP-BLART, sy-vline,
  WA_KSEL_COVP-ORGVG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KSEL_COVP 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_KSEL_COVP 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_KSEL_COVP INTO WA_KSEL_COVP.


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

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

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

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

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

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

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

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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_KSEL_COVP-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KSEL_COVP-MATNR.
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_KSEL_COVP_STR, 
VRGNG TYPE STRING,
BLDAT TYPE STRING,
USNAM TYPE STRING,
BLTXT TYPE STRING,
STFLG TYPE STRING,
STOKZ TYPE STRING,
REFBT TYPE STRING,
REFBN TYPE STRING,
REFBK TYPE STRING,
BLART TYPE STRING,
ORGVG TYPE STRING,
ALEBN TYPE STRING,
SGTXT TYPE STRING,
GKOAR TYPE STRING,
GKONT TYPE STRING,
PERNR TYPE STRING,
WTGBTR TYPE STRING,
TWAER TYPE STRING,
WOGBTR TYPE STRING,
OWAER TYPE STRING,
WKGBTR TYPE STRING,
MEGBTR TYPE STRING,
MEINH TYPE STRING,
MBGBTR TYPE STRING,
MEINB TYPE STRING,
GSBER TYPE STRING,
BUKRS TYPE STRING,
FKBER TYPE STRING,
WERKS TYPE STRING,
MATNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KSEL_COVP_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_KSEL_COVP_STR-VRGNG sy-vline 
WA_KSEL_COVP_STR-BLDAT sy-vline 
WA_KSEL_COVP_STR-USNAM sy-vline 
WA_KSEL_COVP_STR-BLTXT sy-vline 
WA_KSEL_COVP_STR-STFLG sy-vline 
WA_KSEL_COVP_STR-STOKZ sy-vline 
WA_KSEL_COVP_STR-REFBT sy-vline 
WA_KSEL_COVP_STR-REFBN sy-vline 
WA_KSEL_COVP_STR-REFBK sy-vline 
WA_KSEL_COVP_STR-BLART sy-vline 
WA_KSEL_COVP_STR-ORGVG sy-vline 
WA_KSEL_COVP_STR-ALEBN sy-vline 
WA_KSEL_COVP_STR-SGTXT sy-vline 
WA_KSEL_COVP_STR-GKOAR sy-vline 
WA_KSEL_COVP_STR-GKONT sy-vline 
WA_KSEL_COVP_STR-PERNR sy-vline 
WA_KSEL_COVP_STR-WTGBTR sy-vline 
WA_KSEL_COVP_STR-TWAER sy-vline 
WA_KSEL_COVP_STR-WOGBTR sy-vline 
WA_KSEL_COVP_STR-OWAER sy-vline 
WA_KSEL_COVP_STR-WKGBTR sy-vline 
WA_KSEL_COVP_STR-MEGBTR sy-vline 
WA_KSEL_COVP_STR-MEINH sy-vline 
WA_KSEL_COVP_STR-MBGBTR sy-vline 
WA_KSEL_COVP_STR-MEINB sy-vline 
WA_KSEL_COVP_STR-GSBER sy-vline 
WA_KSEL_COVP_STR-BUKRS sy-vline 
WA_KSEL_COVP_STR-FKBER sy-vline 
WA_KSEL_COVP_STR-WERKS sy-vline 
WA_KSEL_COVP_STR-MATNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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