ABAP Select data from SAP table RECA_CHANGEDOC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RECA_CHANGEDOC
*  INTO TABLE @DATA(IT_RECA_CHANGEDOC2).
*--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_RECA_CHANGEDOC INDEX 1 INTO DATA(WA_RECA_CHANGEDOC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RECA_CHANGEDOC>-UDATE = 1.
<RECA_CHANGEDOC>-UTIME = 1.
<RECA_CHANGEDOC>-OBJECT_CHANGE_INDICATORBUSINES = 1.
<RECA_CHANGEDOC>-CHANGENR = 1.
<RECA_CHANGEDOC>-USERNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RECA_CHANGEDOC-USERNAMETEXT, sy-vline,
  WA_RECA_CHANGEDOC-DEPARTMENT, sy-vline,
  WA_RECA_CHANGEDOC-TCODE, sy-vline,
  WA_RECA_CHANGEDOC-TCODETEXT, sy-vline,
  WA_RECA_CHANGEDOC-OBJECTCLAS, sy-vline,
  WA_RECA_CHANGEDOC-OBJECTCLASTEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RECA_CHANGEDOC 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_RECA_CHANGEDOC 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_RECA_CHANGEDOC INTO WA_RECA_CHANGEDOC.


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

*Conversion exit ALPHA, internal->external for field OBJECTCLAS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RECA_CHANGEDOC-OBJECTCLAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RECA_CHANGEDOC-OBJECTCLAS.
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_RECA_CHANGEDOC_STR, 
UDATE TYPE STRING,
UTIME TYPE STRING,
OBJECT_CHANGE_INDICATORBUSINES TYPE STRING,
CHANGENR TYPE STRING,
USERNAME TYPE STRING,
USERNAMETEXT TYPE STRING,
DEPARTMENT TYPE STRING,
TCODE TYPE STRING,
TCODETEXT TYPE STRING,
OBJECTCLAS TYPE STRING,
OBJECTCLASTEXT TYPE STRING,
OBJECTID TYPE STRING,
OBJECTIDTEXT TYPE STRING,
TABLENAME TYPE STRING,
TABLENAMETEXT TYPE STRING,
TABLEKEY TYPE STRING,
TABLEKEYTEXT TYPE STRING,
TABLEKEYGROUP TYPE STRING,
FIELDNAME TYPE STRING,
FIELDNAMETEXT TYPE STRING,
SCRTEXT_L TYPE STRING,
FIELDVALUE_NEWTEXT TYPE STRING,
FIELDVALUE_NEW TYPE STRING,
FIELDVALUE_OLDTEXT TYPE STRING,
FIELDVALUE_OLD TYPE STRING,
VALID_FROM_TO TYPE STRING,
VALID_FROM_TOTEXT TYPE STRING,
RELEASE_STATUS TYPE STRING,
RELEASE_STATUSTEXT TYPE STRING,
PRIORITY_INTERNAL TYPE STRING,
PRIORITY_EXTERNAL TYPE STRING,
CHNGIND TYPE STRING,
CHNGINDTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RECA_CHANGEDOC_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_RECA_CHANGEDOC_STR-UDATE sy-vline 
WA_RECA_CHANGEDOC_STR-UTIME sy-vline 
WA_RECA_CHANGEDOC_STR-OBJECT_CHANGE_INDICATORBUSINES sy-vline 
WA_RECA_CHANGEDOC_STR-CHANGENR sy-vline 
WA_RECA_CHANGEDOC_STR-USERNAME sy-vline 
WA_RECA_CHANGEDOC_STR-USERNAMETEXT sy-vline 
WA_RECA_CHANGEDOC_STR-DEPARTMENT sy-vline 
WA_RECA_CHANGEDOC_STR-TCODE sy-vline 
WA_RECA_CHANGEDOC_STR-TCODETEXT sy-vline 
WA_RECA_CHANGEDOC_STR-OBJECTCLAS sy-vline 
WA_RECA_CHANGEDOC_STR-OBJECTCLASTEXT sy-vline 
WA_RECA_CHANGEDOC_STR-OBJECTID sy-vline 
WA_RECA_CHANGEDOC_STR-OBJECTIDTEXT sy-vline 
WA_RECA_CHANGEDOC_STR-TABLENAME sy-vline 
WA_RECA_CHANGEDOC_STR-TABLENAMETEXT sy-vline 
WA_RECA_CHANGEDOC_STR-TABLEKEY sy-vline 
WA_RECA_CHANGEDOC_STR-TABLEKEYTEXT sy-vline 
WA_RECA_CHANGEDOC_STR-TABLEKEYGROUP sy-vline 
WA_RECA_CHANGEDOC_STR-FIELDNAME sy-vline 
WA_RECA_CHANGEDOC_STR-FIELDNAMETEXT sy-vline 
WA_RECA_CHANGEDOC_STR-SCRTEXT_L sy-vline 
WA_RECA_CHANGEDOC_STR-FIELDVALUE_NEWTEXT sy-vline 
WA_RECA_CHANGEDOC_STR-FIELDVALUE_NEW sy-vline 
WA_RECA_CHANGEDOC_STR-FIELDVALUE_OLDTEXT sy-vline 
WA_RECA_CHANGEDOC_STR-FIELDVALUE_OLD sy-vline 
WA_RECA_CHANGEDOC_STR-VALID_FROM_TO sy-vline 
WA_RECA_CHANGEDOC_STR-VALID_FROM_TOTEXT sy-vline 
WA_RECA_CHANGEDOC_STR-RELEASE_STATUS sy-vline 
WA_RECA_CHANGEDOC_STR-RELEASE_STATUSTEXT sy-vline 
WA_RECA_CHANGEDOC_STR-PRIORITY_INTERNAL sy-vline 
WA_RECA_CHANGEDOC_STR-PRIORITY_EXTERNAL sy-vline 
WA_RECA_CHANGEDOC_STR-CHNGIND sy-vline 
WA_RECA_CHANGEDOC_STR-CHNGINDTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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