ABAP Select data from SAP table RCGWHITT into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCGWHITT
*  INTO TABLE @DATA(IT_RCGWHITT2).
*--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_RCGWHITT INDEX 1 INTO DATA(WA_RCGWHITT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCGWHITT>-TRGDOKVR = 1.
<RCGWHITT>-TRGDOKTL = 1.
<RCGWHITT>-ID = 1.
<RCGWHITT>-OBJECT = 1.
<RCGWHITT>-LANGU = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCGWHITT-TYP, sy-vline,
  WA_RCGWHITT-DOKVERSION, sy-vline,
  WA_RCGWHITT-LINE, sy-vline,
  WA_RCGWHITT-DOKFORMAT, sy-vline,
  WA_RCGWHITT-DOKTEXT, sy-vline,
  WA_RCGWHITT-GENMODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCGWHITT 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_RCGWHITT 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_RCGWHITT INTO WA_RCGWHITT.


*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 LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RCGWHITT-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGWHITT-LANGU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SRCDOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RCGWHITT-SRCDOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCGWHITT-SRCDOKNR.
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_RCGWHITT_STR, 
TRGDOKVR TYPE STRING,
TRGDOKTL TYPE STRING,
ID TYPE STRING,
OBJECT TYPE STRING,
LANGU TYPE STRING,
TYP TYPE STRING,
DOKVERSION TYPE STRING,
LINE TYPE STRING,
DOKFORMAT TYPE STRING,
DOKTEXT TYPE STRING,
GENMODE TYPE STRING,
SRCDOKAR TYPE STRING,
SRCDOKNR TYPE STRING,
SRCDOKVR TYPE STRING,
SRCDOKTL TYPE STRING,
WWIAPPL1 TYPE STRING,
WWIAPPL2 TYPE STRING,
PRTYPE TYPE STRING,
OHORDERNO TYPE STRING,
OHORDERCNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCGWHITT_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_RCGWHITT_STR-TRGDOKVR sy-vline 
WA_RCGWHITT_STR-TRGDOKTL sy-vline 
WA_RCGWHITT_STR-ID sy-vline 
WA_RCGWHITT_STR-OBJECT sy-vline 
WA_RCGWHITT_STR-LANGU sy-vline 
WA_RCGWHITT_STR-TYP sy-vline 
WA_RCGWHITT_STR-DOKVERSION sy-vline 
WA_RCGWHITT_STR-LINE sy-vline 
WA_RCGWHITT_STR-DOKFORMAT sy-vline 
WA_RCGWHITT_STR-DOKTEXT sy-vline 
WA_RCGWHITT_STR-GENMODE sy-vline 
WA_RCGWHITT_STR-SRCDOKAR sy-vline 
WA_RCGWHITT_STR-SRCDOKNR sy-vline 
WA_RCGWHITT_STR-SRCDOKVR sy-vline 
WA_RCGWHITT_STR-SRCDOKTL sy-vline 
WA_RCGWHITT_STR-WWIAPPL1 sy-vline 
WA_RCGWHITT_STR-WWIAPPL2 sy-vline 
WA_RCGWHITT_STR-PRTYPE sy-vline 
WA_RCGWHITT_STR-OHORDERNO sy-vline 
WA_RCGWHITT_STR-OHORDERCNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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