ABAP Select data from SAP table RCEVV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCEVV
*  INTO TABLE @DATA(IT_RCEVV2).
*--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_RCEVV INDEX 1 INTO DATA(WA_RCEVV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCEVV>-MANDT = 1.
<RCEVV>-VRFNR = 1.
<RCEVV>-LTXKZ = 1.
<RCEVV>-METNR = 1.
<RCEVV>-MEINN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCEVV-MZART, sy-vline,
  WA_RCEVV-ASWKZ, sy-vline,
  WA_RCEVV-KTEX1, sy-vline,
  WA_RCEVV-BLUB1, sy-vline,
  WA_RCEVV-BLUB2, sy-vline,
  WA_RCEVV-BLUB3, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCEVV 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_RCEVV 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_RCEVV INTO WA_RCEVV.


*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_RCEVV_STR, 
MANDT TYPE STRING,
VRFNR TYPE STRING,
LTXKZ TYPE STRING,
METNR TYPE STRING,
MEINN TYPE STRING,
MZART TYPE STRING,
ASWKZ TYPE STRING,
KTEX1 TYPE STRING,
BLUB1 TYPE STRING,
BLUB2 TYPE STRING,
BLUB3 TYPE STRING,
BLUB4 TYPE STRING,
BLUB5 TYPE STRING,
KOMM1 TYPE STRING,
KOMM2 TYPE STRING,
ENTRY_ACT TYPE STRING,
ENTRIES TYPE STRING,
MARK TYPE STRING,
VERUM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCEVV_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_RCEVV_STR-MANDT sy-vline 
WA_RCEVV_STR-VRFNR sy-vline 
WA_RCEVV_STR-LTXKZ sy-vline 
WA_RCEVV_STR-METNR sy-vline 
WA_RCEVV_STR-MEINN sy-vline 
WA_RCEVV_STR-MZART sy-vline 
WA_RCEVV_STR-ASWKZ sy-vline 
WA_RCEVV_STR-KTEX1 sy-vline 
WA_RCEVV_STR-BLUB1 sy-vline 
WA_RCEVV_STR-BLUB2 sy-vline 
WA_RCEVV_STR-BLUB3 sy-vline 
WA_RCEVV_STR-BLUB4 sy-vline 
WA_RCEVV_STR-BLUB5 sy-vline 
WA_RCEVV_STR-KOMM1 sy-vline 
WA_RCEVV_STR-KOMM2 sy-vline 
WA_RCEVV_STR-ENTRY_ACT sy-vline 
WA_RCEVV_STR-ENTRIES sy-vline 
WA_RCEVV_STR-MARK sy-vline 
WA_RCEVV_STR-VERUM sy-vline      INTO ld_text SEPARATED BY SPACE.

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