ABAP Select data from SAP table RERADOCITEM_EX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RERADOCITEM_EX
*  INTO TABLE @DATA(IT_RERADOCITEM_EX2).
*--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_RERADOCITEM_EX INDEX 1 INTO DATA(WA_RERADOCITEM_EX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RERADOCITEM_EX>-BUKRS = 1.
<RERADOCITEM_EX>-ACCSYSTEM = 1.
<RERADOCITEM_EX>-LOGSYSTEM = 1.
<RERADOCITEM_EX>-DOCITEMID = 1.
<RERADOCITEM_EX>-COSTACCOUNT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RERADOCITEM_EX-TAXACCOUNT, sy-vline,
  WA_RERADOCITEM_EX-TAXTYPE, sy-vline,
  WA_RERADOCITEM_EX-TAXGROUP, sy-vline,
  WA_RERADOCITEM_EX-NETAMOUNT, sy-vline,
  WA_RERADOCITEM_EX-TAXAMOUNT, sy-vline,
  WA_RERADOCITEM_EX-DEDTAXAMT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RERADOCITEM_EX 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_RERADOCITEM_EX 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_RERADOCITEM_EX INTO WA_RERADOCITEM_EX.


*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 ALPHA, internal->external for field LOGSYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RERADOCITEM_EX-LOGSYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RERADOCITEM_EX-LOGSYSTEM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit REDAT, internal->external for field PTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_RERADOCITEM_EX-PTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RERADOCITEM_EX-PTO.
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_RERADOCITEM_EX_STR, 
BUKRS TYPE STRING,
ACCSYSTEM TYPE STRING,
LOGSYSTEM TYPE STRING,
DOCITEMID TYPE STRING,
COSTACCOUNT TYPE STRING,
TAXACCOUNT TYPE STRING,
TAXTYPE TYPE STRING,
TAXGROUP TYPE STRING,
NETAMOUNT TYPE STRING,
TAXAMOUNT TYPE STRING,
DEDTAXAMT TYPE STRING,
NONDEDTAXAMT TYPE STRING,
CURRENCY TYPE STRING,
PFROM TYPE STRING,
PTO TYPE STRING,
OBJNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RERADOCITEM_EX_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_RERADOCITEM_EX_STR-BUKRS sy-vline 
WA_RERADOCITEM_EX_STR-ACCSYSTEM sy-vline 
WA_RERADOCITEM_EX_STR-LOGSYSTEM sy-vline 
WA_RERADOCITEM_EX_STR-DOCITEMID sy-vline 
WA_RERADOCITEM_EX_STR-COSTACCOUNT sy-vline 
WA_RERADOCITEM_EX_STR-TAXACCOUNT sy-vline 
WA_RERADOCITEM_EX_STR-TAXTYPE sy-vline 
WA_RERADOCITEM_EX_STR-TAXGROUP sy-vline 
WA_RERADOCITEM_EX_STR-NETAMOUNT sy-vline 
WA_RERADOCITEM_EX_STR-TAXAMOUNT sy-vline 
WA_RERADOCITEM_EX_STR-DEDTAXAMT sy-vline 
WA_RERADOCITEM_EX_STR-NONDEDTAXAMT sy-vline 
WA_RERADOCITEM_EX_STR-CURRENCY sy-vline 
WA_RERADOCITEM_EX_STR-PFROM sy-vline 
WA_RERADOCITEM_EX_STR-PTO sy-vline 
WA_RERADOCITEM_EX_STR-OBJNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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