ABAP Select data from SAP table TRKLEINTST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TRKLEINTST
*  INTO TABLE @DATA(IT_TRKLEINTST2).
*--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_TRKLEINTST INDEX 1 INTO DATA(WA_TRKLEINTST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TRKLEINTST>-CURR_OBJ = 1.
<TRKLEINTST>-TRKORR = 1.
<TRKLEINTST>-AS4POS = 1.
<TRKLEINTST>-PGMID = 1.
<TRKLEINTST>-OBJECT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TRKLEINTST-OBJ_NAME, sy-vline,
  WA_TRKLEINTST-OBJFUNC, sy-vline,
  WA_TRKLEINTST-LOCKFLAG, sy-vline,
  WA_TRKLEINTST-GENNUM, sy-vline,
  WA_TRKLEINTST-LANG, sy-vline,
  WA_TRKLEINTST-ACTIVITY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TRKLEINTST 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_TRKLEINTST 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_TRKLEINTST INTO WA_TRKLEINTST.


*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 ISOLA, internal->external for field LANG
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_TRKLEINTST-LANG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TRKLEINTST-LANG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LANG
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_TRKLEINTST-LANG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TRKLEINTST-LANG.
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_TRKLEINTST_STR, 
CURR_OBJ TYPE STRING,
TRKORR TYPE STRING,
AS4POS TYPE STRING,
PGMID TYPE STRING,
OBJECT TYPE STRING,
OBJ_NAME TYPE STRING,
OBJFUNC TYPE STRING,
LOCKFLAG TYPE STRING,
GENNUM TYPE STRING,
LANG TYPE STRING,
ACTIVITY TYPE STRING,
CO_OBJNAME TYPE STRING,
CO_OBJTYPE TYPE STRING,
CURSOR TYPE STRING,
FIELDNAME TYPE STRING,
OFFSET TYPE STRING,
LINE TYPE STRING,
KEY_W_CRSR TYPE STRING,
TRKORR TYPE STRING,
PGMID TYPE STRING,
OBJECT TYPE STRING,
OBJNAME TYPE STRING,
AS4POS TYPE STRING,
TOP_KEY TYPE STRING,
TRKORR TYPE STRING,
PGMID TYPE STRING,
OBJECT TYPE STRING,
OBJNAME TYPE STRING,
AS4POS TYPE STRING,
MARKS TYPE STRING,
ACTION TYPE STRING,
ORIG_KEYS TYPE STRING,
ORIG_KEYS_STR TYPE STRING,
E071K_FIND TYPE STRING,
TRKORR TYPE STRING,
PGMID TYPE STRING,
OBJECT TYPE STRING,
OBJNAME TYPE STRING,
AS4POS TYPE STRING,
MASTERTYPE TYPE STRING,
MASTERNAME TYPE STRING,
VIEWNAME TYPE STRING,
OBJFUNC TYPE STRING,
TABKEY TYPE STRING,
SORTFLAG TYPE STRING,
FLAG TYPE STRING,
LANG TYPE STRING,
ACTIVITY TYPE STRING,
MAX_AS4POS TYPE STRING,
CO_SHRTTXT TYPE STRING,
CO_OBJDEF TYPE STRING,
CO_UPDCHCK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TRKLEINTST_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_TRKLEINTST_STR-CURR_OBJ sy-vline 
WA_TRKLEINTST_STR-TRKORR sy-vline 
WA_TRKLEINTST_STR-AS4POS sy-vline 
WA_TRKLEINTST_STR-PGMID sy-vline 
WA_TRKLEINTST_STR-OBJECT sy-vline 
WA_TRKLEINTST_STR-OBJ_NAME sy-vline 
WA_TRKLEINTST_STR-OBJFUNC sy-vline 
WA_TRKLEINTST_STR-LOCKFLAG sy-vline 
WA_TRKLEINTST_STR-GENNUM sy-vline 
WA_TRKLEINTST_STR-LANG sy-vline 
WA_TRKLEINTST_STR-ACTIVITY sy-vline 
WA_TRKLEINTST_STR-CO_OBJNAME sy-vline 
WA_TRKLEINTST_STR-CO_OBJTYPE sy-vline 
WA_TRKLEINTST_STR-CURSOR sy-vline 
WA_TRKLEINTST_STR-FIELDNAME sy-vline 
WA_TRKLEINTST_STR-OFFSET sy-vline 
WA_TRKLEINTST_STR-LINE sy-vline 
WA_TRKLEINTST_STR-KEY_W_CRSR sy-vline 
WA_TRKLEINTST_STR-TRKORR sy-vline 
WA_TRKLEINTST_STR-PGMID sy-vline 
WA_TRKLEINTST_STR-OBJECT sy-vline 
WA_TRKLEINTST_STR-OBJNAME sy-vline 
WA_TRKLEINTST_STR-AS4POS sy-vline 
WA_TRKLEINTST_STR-TOP_KEY sy-vline 
WA_TRKLEINTST_STR-TRKORR sy-vline 
WA_TRKLEINTST_STR-PGMID sy-vline 
WA_TRKLEINTST_STR-OBJECT sy-vline 
WA_TRKLEINTST_STR-OBJNAME sy-vline 
WA_TRKLEINTST_STR-AS4POS sy-vline 
WA_TRKLEINTST_STR-MARKS sy-vline 
WA_TRKLEINTST_STR-ACTION sy-vline 
WA_TRKLEINTST_STR-ORIG_KEYS sy-vline 
WA_TRKLEINTST_STR-ORIG_KEYS_STR sy-vline 
WA_TRKLEINTST_STR-E071K_FIND sy-vline 
WA_TRKLEINTST_STR-TRKORR sy-vline 
WA_TRKLEINTST_STR-PGMID sy-vline 
WA_TRKLEINTST_STR-OBJECT sy-vline 
WA_TRKLEINTST_STR-OBJNAME sy-vline 
WA_TRKLEINTST_STR-AS4POS sy-vline 
WA_TRKLEINTST_STR-MASTERTYPE sy-vline 
WA_TRKLEINTST_STR-MASTERNAME sy-vline 
WA_TRKLEINTST_STR-VIEWNAME sy-vline 
WA_TRKLEINTST_STR-OBJFUNC sy-vline 
WA_TRKLEINTST_STR-TABKEY sy-vline 
WA_TRKLEINTST_STR-SORTFLAG sy-vline 
WA_TRKLEINTST_STR-FLAG sy-vline 
WA_TRKLEINTST_STR-LANG sy-vline 
WA_TRKLEINTST_STR-ACTIVITY sy-vline 
WA_TRKLEINTST_STR-MAX_AS4POS sy-vline 
WA_TRKLEINTST_STR-CO_SHRTTXT sy-vline 
WA_TRKLEINTST_STR-CO_OBJDEF sy-vline 
WA_TRKLEINTST_STR-CO_UPDCHCK sy-vline      INTO ld_text SEPARATED BY SPACE.

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