ABAP Select data from SAP table RCEVX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCEVX
*  INTO TABLE @DATA(IT_RCEVX2).
*--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_RCEVX INDEX 1 INTO DATA(WA_RCEVX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCEVX>-MANDT = 1.
<RCEVX>-ATNAM = 1.
<RCEVX>-PAHSC = 1.
<RCEVX>-TABNAME = 1.
<RCEVX>-DDTEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCEVX-FOMNR, sy-vline,
  WA_RCEVX-STCAP, sy-vline,
  WA_RCEVX-CPLGR, sy-vline,
  WA_RCEVX-SORTB, sy-vline,
  WA_RCEVX-KTEX1, sy-vline,
  WA_RCEVX-FIELDNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCEVX 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_RCEVX 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_RCEVX INTO WA_RCEVX.


*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 DTYPE, internal->external for field DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_RCEVX-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCEVX-DATATYPE.
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_RCEVX_STR, 
MANDT TYPE STRING,
ATNAM TYPE STRING,
PAHSC TYPE STRING,
TABNAME TYPE STRING,
DDTEXT TYPE STRING,
FOMNR TYPE STRING,
STCAP TYPE STRING,
CPLGR TYPE STRING,
SORTB TYPE STRING,
KTEX1 TYPE STRING,
FIELDNAME TYPE STRING,
KEYFLAG TYPE STRING,
DATATYPE TYPE STRING,
LENG TYPE STRING,
DECIMALS TYPE STRING,
SCRTEXT_M TYPE STRING,
SCRTEXT_L TYPE STRING,
MENAM TYPE STRING,
METXT TYPE STRING,
BLUB1 TYPE STRING,
BLUB2 TYPE STRING,
BLUB3 TYPE STRING,
DYCH1 TYPE STRING,
DYCH2 TYPE STRING,
DYCH3 TYPE STRING,
ENTRY_ACT TYPE STRING,
ENTRIES TYPE STRING,
FLG_SEL TYPE STRING,
FOINN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCEVX_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_RCEVX_STR-MANDT sy-vline 
WA_RCEVX_STR-ATNAM sy-vline 
WA_RCEVX_STR-PAHSC sy-vline 
WA_RCEVX_STR-TABNAME sy-vline 
WA_RCEVX_STR-DDTEXT sy-vline 
WA_RCEVX_STR-FOMNR sy-vline 
WA_RCEVX_STR-STCAP sy-vline 
WA_RCEVX_STR-CPLGR sy-vline 
WA_RCEVX_STR-SORTB sy-vline 
WA_RCEVX_STR-KTEX1 sy-vline 
WA_RCEVX_STR-FIELDNAME sy-vline 
WA_RCEVX_STR-KEYFLAG sy-vline 
WA_RCEVX_STR-DATATYPE sy-vline 
WA_RCEVX_STR-LENG sy-vline 
WA_RCEVX_STR-DECIMALS sy-vline 
WA_RCEVX_STR-SCRTEXT_M sy-vline 
WA_RCEVX_STR-SCRTEXT_L sy-vline 
WA_RCEVX_STR-MENAM sy-vline 
WA_RCEVX_STR-METXT sy-vline 
WA_RCEVX_STR-BLUB1 sy-vline 
WA_RCEVX_STR-BLUB2 sy-vline 
WA_RCEVX_STR-BLUB3 sy-vline 
WA_RCEVX_STR-DYCH1 sy-vline 
WA_RCEVX_STR-DYCH2 sy-vline 
WA_RCEVX_STR-DYCH3 sy-vline 
WA_RCEVX_STR-ENTRY_ACT sy-vline 
WA_RCEVX_STR-ENTRIES sy-vline 
WA_RCEVX_STR-FLG_SEL sy-vline 
WA_RCEVX_STR-FOINN sy-vline      INTO ld_text SEPARATED BY SPACE.

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