ABAP Select data from SAP table ICAREVERSEDOCVH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICAREVERSEDOCVH
*  INTO TABLE @DATA(IT_ICAREVERSEDOCVH2).
*--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_ICAREVERSEDOCVH INDEX 1 INTO DATA(WA_ICAREVERSEDOCVH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICAREVERSEDOCVH>-MANDT = 1.
<ICAREVERSEDOCVH>-CAREVERSEDDOCUMENTNUMBER = 1.
<ICAREVERSEDOCVH>-CADOCUMENTTYPE = 1.
<ICAREVERSEDOCVH>-CADOCUMENTTYPENAME = 1.
<ICAREVERSEDOCVH>-CARECONCILIATIONKEY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICAREVERSEDOCVH-CAPOSTINGDATE, sy-vline,
  WA_ICAREVERSEDOCVH-CADOCUMENTORIGINCODE, sy-vline,
  WA_ICAREVERSEDOCVH-CADOCUMENTORIGINCODENAME, sy-vline,
  WA_ICAREVERSEDOCVH-CREATEDBYUSER, sy-vline,
  WA_ICAREVERSEDOCVH-CREATEDBYUSERNAME, sy-vline,
  WA_ICAREVERSEDOCVH-CREATIONDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICAREVERSEDOCVH 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_ICAREVERSEDOCVH 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_ICAREVERSEDOCVH INTO WA_ICAREVERSEDOCVH.


*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 CAREVERSEDDOCUMENTNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICAREVERSEDOCVH-CAREVERSEDDOCUMENTNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICAREVERSEDOCVH-CAREVERSEDDOCUMENTNUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CAREFERENCEDOCUMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICAREVERSEDOCVH-CAREFERENCEDOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICAREVERSEDOCVH-CAREFERENCEDOCUMENT.
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_ICAREVERSEDOCVH_STR, 
MANDT TYPE STRING,
CAREVERSEDDOCUMENTNUMBER TYPE STRING,
CADOCUMENTTYPE TYPE STRING,
CADOCUMENTTYPENAME TYPE STRING,
CARECONCILIATIONKEY TYPE STRING,
CAPOSTINGDATE TYPE STRING,
CADOCUMENTORIGINCODE TYPE STRING,
CADOCUMENTORIGINCODENAME TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATEDBYUSERNAME TYPE STRING,
CREATIONDATE TYPE STRING,
CAREFERENCEDOCUMENT TYPE STRING,
CAAPPLICATIONAREA TYPE STRING,
CATAXCOMPANYCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICAREVERSEDOCVH_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_ICAREVERSEDOCVH_STR-MANDT sy-vline 
WA_ICAREVERSEDOCVH_STR-CAREVERSEDDOCUMENTNUMBER sy-vline 
WA_ICAREVERSEDOCVH_STR-CADOCUMENTTYPE sy-vline 
WA_ICAREVERSEDOCVH_STR-CADOCUMENTTYPENAME sy-vline 
WA_ICAREVERSEDOCVH_STR-CARECONCILIATIONKEY sy-vline 
WA_ICAREVERSEDOCVH_STR-CAPOSTINGDATE sy-vline 
WA_ICAREVERSEDOCVH_STR-CADOCUMENTORIGINCODE sy-vline 
WA_ICAREVERSEDOCVH_STR-CADOCUMENTORIGINCODENAME sy-vline 
WA_ICAREVERSEDOCVH_STR-CREATEDBYUSER sy-vline 
WA_ICAREVERSEDOCVH_STR-CREATEDBYUSERNAME sy-vline 
WA_ICAREVERSEDOCVH_STR-CREATIONDATE sy-vline 
WA_ICAREVERSEDOCVH_STR-CAREFERENCEDOCUMENT sy-vline 
WA_ICAREVERSEDOCVH_STR-CAAPPLICATIONAREA sy-vline 
WA_ICAREVERSEDOCVH_STR-CATAXCOMPANYCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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