ABAP Select data from SAP table TRCCS_CHANGEOVER_DISPLAY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TRCCS_CHANGEOVER_DISPLAY
*  INTO TABLE @DATA(IT_TRCCS_CHANGEOVER_DISPLAY2).
*--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_TRCCS_CHANGEOVER_DISPLAY INDEX 1 INTO DATA(WA_TRCCS_CHANGEOVER_DISPLAY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TRCCS_CHANGEOVER_DISPLAY>-OLD_CURR = 1.
<TRCCS_CHANGEOVER_DISPLAY>-NEW_CURR = 1.
<TRCCS_CHANGEOVER_DISPLAY>-KEY_DATE = 1.
<TRCCS_CHANGEOVER_DISPLAY>-CHANGEOVER_CAT = 1.
<TRCCS_CHANGEOVER_DISPLAY>-STATUS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TRCCS_CHANGEOVER_DISPLAY-NR_RANGE_DEAL, sy-vline,
  WA_TRCCS_CHANGEOVER_DISPLAY-CONV_FACTOR, sy-vline,
  WA_TRCCS_CHANGEOVER_DISPLAY-DESCRIPTION, sy-vline,
  WA_TRCCS_CHANGEOVER_DISPLAY-STATUS_TEXT, sy-vline,
  WA_TRCCS_CHANGEOVER_DISPLAY-OLD_CURR_TEXT, sy-vline,
  WA_TRCCS_CHANGEOVER_DISPLAY-NEW_CURR_TEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TRCCS_CHANGEOVER_DISPLAY 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_TRCCS_CHANGEOVER_DISPLAY 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_TRCCS_CHANGEOVER_DISPLAY INTO WA_TRCCS_CHANGEOVER_DISPLAY.


*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 EXCRT, internal->external for field FIX_RATE
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_TRCCS_CHANGEOVER_DISPLAY-FIX_RATE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TRCCS_CHANGEOVER_DISPLAY-FIX_RATE.
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_TRCCS_CHANGEOVER_DISPLAY_STR, 
OLD_CURR TYPE STRING,
NEW_CURR TYPE STRING,
KEY_DATE TYPE STRING,
CHANGEOVER_CAT TYPE STRING,
STATUS TYPE STRING,
NR_RANGE_DEAL TYPE STRING,
CONV_FACTOR TYPE STRING,
DESCRIPTION TYPE STRING,
STATUS_TEXT TYPE STRING,
OLD_CURR_TEXT TYPE STRING,
NEW_CURR_TEXT TYPE STRING,
FIX_RATE TYPE STRING,
RATE_TYPE TYPE STRING,
OS_GUID TYPE STRING,
CREATE_NAME TYPE STRING,
CREATE_DATE TYPE STRING,
CREATE_TIME TYPE STRING,
CREATE_TCODE TYPE STRING,
CHANGE_NAME TYPE STRING,
CHANGE_DATE TYPE STRING,
CHANGE_TIME TYPE STRING,
CHANGE_TCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TRCCS_CHANGEOVER_DISPLAY_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_TRCCS_CHANGEOVER_DISPLAY_STR-OLD_CURR sy-vline 
WA_TRCCS_CHANGEOVER_DISPLAY_STR-NEW_CURR sy-vline 
WA_TRCCS_CHANGEOVER_DISPLAY_STR-KEY_DATE sy-vline 
WA_TRCCS_CHANGEOVER_DISPLAY_STR-CHANGEOVER_CAT sy-vline 
WA_TRCCS_CHANGEOVER_DISPLAY_STR-STATUS sy-vline 
WA_TRCCS_CHANGEOVER_DISPLAY_STR-NR_RANGE_DEAL sy-vline 
WA_TRCCS_CHANGEOVER_DISPLAY_STR-CONV_FACTOR sy-vline 
WA_TRCCS_CHANGEOVER_DISPLAY_STR-DESCRIPTION sy-vline 
WA_TRCCS_CHANGEOVER_DISPLAY_STR-STATUS_TEXT sy-vline 
WA_TRCCS_CHANGEOVER_DISPLAY_STR-OLD_CURR_TEXT sy-vline 
WA_TRCCS_CHANGEOVER_DISPLAY_STR-NEW_CURR_TEXT sy-vline 
WA_TRCCS_CHANGEOVER_DISPLAY_STR-FIX_RATE sy-vline 
WA_TRCCS_CHANGEOVER_DISPLAY_STR-RATE_TYPE sy-vline 
WA_TRCCS_CHANGEOVER_DISPLAY_STR-OS_GUID sy-vline 
WA_TRCCS_CHANGEOVER_DISPLAY_STR-CREATE_NAME sy-vline 
WA_TRCCS_CHANGEOVER_DISPLAY_STR-CREATE_DATE sy-vline 
WA_TRCCS_CHANGEOVER_DISPLAY_STR-CREATE_TIME sy-vline 
WA_TRCCS_CHANGEOVER_DISPLAY_STR-CREATE_TCODE sy-vline 
WA_TRCCS_CHANGEOVER_DISPLAY_STR-CHANGE_NAME sy-vline 
WA_TRCCS_CHANGEOVER_DISPLAY_STR-CHANGE_DATE sy-vline 
WA_TRCCS_CHANGEOVER_DISPLAY_STR-CHANGE_TIME sy-vline 
WA_TRCCS_CHANGEOVER_DISPLAY_STR-CHANGE_TCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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