ABAP Select data from SAP table TKEPTRK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TKEPTRK
*  INTO TABLE @DATA(IT_TKEPTRK2).
*--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_TKEPTRK INDEX 1 INTO DATA(WA_TKEPTRK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TKEPTRK>-MANDT = 1.
<TKEPTRK>-APPLCLASS = 1.
<TKEPTRK>-SUBCLASS = 1.
<TKEPTRK>-TABNAME = 1.
<TKEPTRK>-TREVAL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TKEPTRK-REF_TREVAL, sy-vline,
  WA_TKEPTRK-CRNAM, sy-vline,
  WA_TKEPTRK-CRDAT, sy-vline,
  WA_TKEPTRK-UPNAM, sy-vline,
  WA_TKEPTRK-UPDAT, sy-vline,
  WA_TKEPTRK-STATUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TKEPTRK 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_TKEPTRK 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_TKEPTRK INTO WA_TKEPTRK.


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

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

*Conversion exit PERI7, internal->external for field APERIO
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_TKEPTRK-APERIO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TKEPTRK-APERIO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI7, internal->external for field EPERIO
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_TKEPTRK-EPERIO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TKEPTRK-EPERIO.
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_TKEPTRK_STR, 
MANDT TYPE STRING,
APPLCLASS TYPE STRING,
SUBCLASS TYPE STRING,
TABNAME TYPE STRING,
TREVAL TYPE STRING,
REF_TREVAL TYPE STRING,
CRNAM TYPE STRING,
CRDAT TYPE STRING,
UPNAM TYPE STRING,
UPDAT TYPE STRING,
STATUS TYPE STRING,
TYPE TYPE STRING,
PERFLAG TYPE STRING,
PERIV TYPE STRING,
APERIO TYPE STRING,
EPERIO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TKEPTRK_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_TKEPTRK_STR-MANDT sy-vline 
WA_TKEPTRK_STR-APPLCLASS sy-vline 
WA_TKEPTRK_STR-SUBCLASS sy-vline 
WA_TKEPTRK_STR-TABNAME sy-vline 
WA_TKEPTRK_STR-TREVAL sy-vline 
WA_TKEPTRK_STR-REF_TREVAL sy-vline 
WA_TKEPTRK_STR-CRNAM sy-vline 
WA_TKEPTRK_STR-CRDAT sy-vline 
WA_TKEPTRK_STR-UPNAM sy-vline 
WA_TKEPTRK_STR-UPDAT sy-vline 
WA_TKEPTRK_STR-STATUS sy-vline 
WA_TKEPTRK_STR-TYPE sy-vline 
WA_TKEPTRK_STR-PERFLAG sy-vline 
WA_TKEPTRK_STR-PERIV sy-vline 
WA_TKEPTRK_STR-APERIO sy-vline 
WA_TKEPTRK_STR-EPERIO sy-vline      INTO ld_text SEPARATED BY SPACE.

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