ABAP Select data from SAP table TKKAS_L into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TKKAS_L
*  INTO TABLE @DATA(IT_TKKAS_L2).
*--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_TKKAS_L INDEX 1 INTO DATA(WA_TKKAS_L2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TKKAS_L>-MANDT = 1.
<TKKAS_L>-KOKRS = 1.
<TKKAS_L>-VERSA = 1.
<TKKAS_L>-ABGSL = 1.
<TKKAS_L>-XPERT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TKKAS_L-STAT1, sy-vline,
  WA_TKKAS_L-STAT2, sy-vline,
  WA_TKKAS_L-METHO, sy-vline,
  WA_TKKAS_L-EBBEW, sy-vline,
  WA_TKKAS_L-GEWBS, sy-vline,
  WA_TKKAS_L-MIBST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TKKAS_L 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_TKKAS_L 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_TKKAS_L INTO WA_TKKAS_L.


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

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

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

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

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

*Conversion exit ALPHA, internal->external for field VERSS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TKKAS_L-VERSS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TKKAS_L-VERSS.
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_TKKAS_L_STR, 
MANDT TYPE STRING,
KOKRS TYPE STRING,
VERSA TYPE STRING,
ABGSL TYPE STRING,
XPERT TYPE STRING,
STAT1 TYPE STRING,
STAT2 TYPE STRING,
METHO TYPE STRING,
EBBEW TYPE STRING,
GEWBS TYPE STRING,
MIBST TYPE STRING,
MIRUE TYPE STRING,
MIPRO TYPE STRING,
MIRDV TYPE STRING,
RFLG5 TYPE STRING,
PROFNR TYPE STRING,
VERSS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TKKAS_L_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_TKKAS_L_STR-MANDT sy-vline 
WA_TKKAS_L_STR-KOKRS sy-vline 
WA_TKKAS_L_STR-VERSA sy-vline 
WA_TKKAS_L_STR-ABGSL sy-vline 
WA_TKKAS_L_STR-XPERT sy-vline 
WA_TKKAS_L_STR-STAT1 sy-vline 
WA_TKKAS_L_STR-STAT2 sy-vline 
WA_TKKAS_L_STR-METHO sy-vline 
WA_TKKAS_L_STR-EBBEW sy-vline 
WA_TKKAS_L_STR-GEWBS sy-vline 
WA_TKKAS_L_STR-MIBST sy-vline 
WA_TKKAS_L_STR-MIRUE sy-vline 
WA_TKKAS_L_STR-MIPRO sy-vline 
WA_TKKAS_L_STR-MIRDV sy-vline 
WA_TKKAS_L_STR-RFLG5 sy-vline 
WA_TKKAS_L_STR-PROFNR sy-vline 
WA_TKKAS_L_STR-VERSS sy-vline      INTO ld_text SEPARATED BY SPACE.

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