ABAP Select data from SAP table RCTCU 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 RCTCU 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 RCTCU. 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 RCTCU 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_RCTCU TYPE STANDARD TABLE OF RCTCU,
      WA_RCTCU TYPE RCTCU,
      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: <RCTCU> TYPE RCTCU.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCTCU
*  INTO TABLE @DATA(IT_RCTCU2).
*--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_RCTCU INDEX 1 INTO DATA(WA_RCTCU2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCTCU>-FNAME = 1.
<RCTCU>-LANGU = 1.
<RCTCU>-FRTXT = 1.
<RCTCU>-GROUP = 1.
<RCTCU>-PUSHB = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCTCU-KCOMP, sy-vline,
  WA_RCTCU-TABST, sy-vline,
  WA_RCTCU-SORTC, sy-vline,
  WA_RCTCU-SPVON, sy-vline,
  WA_RCTCU-SPBIS, sy-vline,
  WA_RCTCU-ZLVON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCTCU 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_RCTCU 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_RCTCU INTO WA_RCTCU.


*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_RCTCU-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCTCU-LANGU.
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_RCTCU_STR, 
FNAME TYPE STRING,
LANGU TYPE STRING,
FRTXT TYPE STRING,
GROUP TYPE STRING,
PUSHB TYPE STRING,
KCOMP TYPE STRING,
TABST TYPE STRING,
SORTC TYPE STRING,
SPVON TYPE STRING,
SPBIS TYPE STRING,
ZLVON TYPE STRING,
ZLBIS TYPE STRING,
GRTXT TYPE STRING,
PBTXT TYPE STRING,
KZMAL TYPE STRING,
KZMEZ TYPE STRING,
KZMAR TYPE STRING,
ATBEZ TYPE STRING,
SDSRT TYPE STRING,
CE_S_SALES TYPE STRING,
CE_S_ENGINEER TYPE STRING,
CE_S_P_SALES TYPE STRING,
CE_S_P_PURCHASE TYPE STRING,
CE_S_P_ENGINEER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCTCU_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_RCTCU_STR-FNAME sy-vline 
WA_RCTCU_STR-LANGU sy-vline 
WA_RCTCU_STR-FRTXT sy-vline 
WA_RCTCU_STR-GROUP sy-vline 
WA_RCTCU_STR-PUSHB sy-vline 
WA_RCTCU_STR-KCOMP sy-vline 
WA_RCTCU_STR-TABST sy-vline 
WA_RCTCU_STR-SORTC sy-vline 
WA_RCTCU_STR-SPVON sy-vline 
WA_RCTCU_STR-SPBIS sy-vline 
WA_RCTCU_STR-ZLVON sy-vline 
WA_RCTCU_STR-ZLBIS sy-vline 
WA_RCTCU_STR-GRTXT sy-vline 
WA_RCTCU_STR-PBTXT sy-vline 
WA_RCTCU_STR-KZMAL sy-vline 
WA_RCTCU_STR-KZMEZ sy-vline 
WA_RCTCU_STR-KZMAR sy-vline 
WA_RCTCU_STR-ATBEZ sy-vline 
WA_RCTCU_STR-SDSRT sy-vline 
WA_RCTCU_STR-CE_S_SALES sy-vline 
WA_RCTCU_STR-CE_S_ENGINEER sy-vline 
WA_RCTCU_STR-CE_S_P_SALES sy-vline 
WA_RCTCU_STR-CE_S_P_PURCHASE sy-vline 
WA_RCTCU_STR-CE_S_P_ENGINEER sy-vline      INTO ld_text SEPARATED BY SPACE.

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