ABAP Select data from SAP table TROLENAVIG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TROLENAVIG
*  INTO TABLE @DATA(IT_TROLENAVIG2).
*--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_TROLENAVIG INDEX 1 INTO DATA(WA_TROLENAVIG2).


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

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

ENDLOOP.

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

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


*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_TROLENAVIG-LANG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TROLENAVIG-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_TROLENAVIG_STR, 
SHOW_KLE TYPE STRING,
OBJECT 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,
OBJECTNAME TYPE STRING,
OBJECTTYPE TYPE STRING,
OBJECTACTN TYPE STRING,
FCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TROLENAVIG_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_TROLENAVIG_STR-SHOW_KLE sy-vline 
WA_TROLENAVIG_STR-OBJECT sy-vline 
WA_TROLENAVIG_STR-TRKORR sy-vline 
WA_TROLENAVIG_STR-AS4POS sy-vline 
WA_TROLENAVIG_STR-PGMID sy-vline 
WA_TROLENAVIG_STR-OBJECT sy-vline 
WA_TROLENAVIG_STR-OBJ_NAME sy-vline 
WA_TROLENAVIG_STR-OBJFUNC sy-vline 
WA_TROLENAVIG_STR-LOCKFLAG sy-vline 
WA_TROLENAVIG_STR-GENNUM sy-vline 
WA_TROLENAVIG_STR-LANG sy-vline 
WA_TROLENAVIG_STR-ACTIVITY sy-vline 
WA_TROLENAVIG_STR-OBJECTNAME sy-vline 
WA_TROLENAVIG_STR-OBJECTTYPE sy-vline 
WA_TROLENAVIG_STR-OBJECTACTN sy-vline 
WA_TROLENAVIG_STR-FCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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