ABAP Select data from SAP table CORUSBUTTON into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CORUSBUTTON
*  INTO TABLE @DATA(IT_CORUSBUTTON2).
*--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_CORUSBUTTON INDEX 1 INTO DATA(WA_CORUSBUTTON2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CORUSBUTTON>-BUTTON1 = 1.
<CORUSBUTTON>-BUTTON2 = 1.
<CORUSBUTTON>-BUTTON3 = 1.
<CORUSBUTTON>-BUTTON4 = 1.
<CORUSBUTTON>-BUTTON5 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CORUSBUTTON-BUTTON6, sy-vline,
  WA_CORUSBUTTON-BUTTON7, sy-vline,
  WA_CORUSBUTTON-BUTTON8, sy-vline,
  WA_CORUSBUTTON-BUTTON9, sy-vline,
  WA_CORUSBUTTON-BUTTON10, sy-vline,
  WA_CORUSBUTTON-BUTTON11, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CORUSBUTTON 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_CORUSBUTTON 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_CORUSBUTTON INTO WA_CORUSBUTTON.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_CORUSBUTTON_STR, 
BUTTON1 TYPE STRING,
BUTTON2 TYPE STRING,
BUTTON3 TYPE STRING,
BUTTON4 TYPE STRING,
BUTTON5 TYPE STRING,
BUTTON6 TYPE STRING,
BUTTON7 TYPE STRING,
BUTTON8 TYPE STRING,
BUTTON9 TYPE STRING,
BUTTON10 TYPE STRING,
BUTTON11 TYPE STRING,
BUTTON12 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CORUSBUTTON_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_CORUSBUTTON_STR-BUTTON1 sy-vline 
WA_CORUSBUTTON_STR-BUTTON2 sy-vline 
WA_CORUSBUTTON_STR-BUTTON3 sy-vline 
WA_CORUSBUTTON_STR-BUTTON4 sy-vline 
WA_CORUSBUTTON_STR-BUTTON5 sy-vline 
WA_CORUSBUTTON_STR-BUTTON6 sy-vline 
WA_CORUSBUTTON_STR-BUTTON7 sy-vline 
WA_CORUSBUTTON_STR-BUTTON8 sy-vline 
WA_CORUSBUTTON_STR-BUTTON9 sy-vline 
WA_CORUSBUTTON_STR-BUTTON10 sy-vline 
WA_CORUSBUTTON_STR-BUTTON11 sy-vline 
WA_CORUSBUTTON_STR-BUTTON12 sy-vline      INTO ld_text SEPARATED BY SPACE.

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