ABAP Select data from SAP table RJD_VAWERK_CHANGE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RJD_VAWERK_CHANGE
*  INTO TABLE @DATA(IT_RJD_VAWERK_CHANGE2).
*--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_RJD_VAWERK_CHANGE INDEX 1 INTO DATA(WA_RJD_VAWERK_CHANGE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RJD_VAWERK_CHANGE>-DRERZ = 1.
<RJD_VAWERK_CHANGE>-PVA = 1.
<RJD_VAWERK_CHANGE>-ERSCHDAT = 1.
<RJD_VAWERK_CHANGE>-HEFTNUMMER = 1.
<RJD_VAWERK_CHANGE>-DRKEI = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RJD_VAWERK_CHANGE-VERFBKTAG, sy-vline,
  WA_RJD_VAWERK_CHANGE-XVERFBKTAG_DEL, sy-vline,
  WA_RJD_VAWERK_CHANGE-VERFBKZEIT, sy-vline,
  WA_RJD_VAWERK_CHANGE-XVERFBKZEIT_DEL, sy-vline,
  WA_RJD_VAWERK_CHANGE-ANLIEFTAGS, sy-vline,
  WA_RJD_VAWERK_CHANGE-XANLIEFTAGS_DEL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RJD_VAWERK_CHANGE 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_RJD_VAWERK_CHANGE 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_RJD_VAWERK_CHANGE INTO WA_RJD_VAWERK_CHANGE.


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

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

*Conversion exit CUNIT, internal->external for field MEINLIEF
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RJD_VAWERK_CHANGE-MEINLIEF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJD_VAWERK_CHANGE-MEINLIEF.
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_RJD_VAWERK_CHANGE_STR, 
DRERZ TYPE STRING,
PVA TYPE STRING,
ERSCHDAT TYPE STRING,
HEFTNUMMER TYPE STRING,
DRKEI TYPE STRING,
VERFBKTAG TYPE STRING,
XVERFBKTAG_DEL TYPE STRING,
VERFBKZEIT TYPE STRING,
XVERFBKZEIT_DEL TYPE STRING,
ANLIEFTAGS TYPE STRING,
XANLIEFTAGS_DEL TYPE STRING,
ANLIEFERZS TYPE STRING,
XANLIEFERZS_DEL TYPE STRING,
ANLIEFTAGI TYPE STRING,
XANLIEFTAGI_DEL TYPE STRING,
ANLIEFERZI TYPE STRING,
XANLIEFERZI_DEL TYPE STRING,
LIEFMENGE TYPE STRING,
XLIEFMENGE_DEL TYPE STRING,
MEINLIEF TYPE STRING,
XMEINLIEF_DEL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RJD_VAWERK_CHANGE_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_RJD_VAWERK_CHANGE_STR-DRERZ sy-vline 
WA_RJD_VAWERK_CHANGE_STR-PVA sy-vline 
WA_RJD_VAWERK_CHANGE_STR-ERSCHDAT sy-vline 
WA_RJD_VAWERK_CHANGE_STR-HEFTNUMMER sy-vline 
WA_RJD_VAWERK_CHANGE_STR-DRKEI sy-vline 
WA_RJD_VAWERK_CHANGE_STR-VERFBKTAG sy-vline 
WA_RJD_VAWERK_CHANGE_STR-XVERFBKTAG_DEL sy-vline 
WA_RJD_VAWERK_CHANGE_STR-VERFBKZEIT sy-vline 
WA_RJD_VAWERK_CHANGE_STR-XVERFBKZEIT_DEL sy-vline 
WA_RJD_VAWERK_CHANGE_STR-ANLIEFTAGS sy-vline 
WA_RJD_VAWERK_CHANGE_STR-XANLIEFTAGS_DEL sy-vline 
WA_RJD_VAWERK_CHANGE_STR-ANLIEFERZS sy-vline 
WA_RJD_VAWERK_CHANGE_STR-XANLIEFERZS_DEL sy-vline 
WA_RJD_VAWERK_CHANGE_STR-ANLIEFTAGI sy-vline 
WA_RJD_VAWERK_CHANGE_STR-XANLIEFTAGI_DEL sy-vline 
WA_RJD_VAWERK_CHANGE_STR-ANLIEFERZI sy-vline 
WA_RJD_VAWERK_CHANGE_STR-XANLIEFERZI_DEL sy-vline 
WA_RJD_VAWERK_CHANGE_STR-LIEFMENGE sy-vline 
WA_RJD_VAWERK_CHANGE_STR-XLIEFMENGE_DEL sy-vline 
WA_RJD_VAWERK_CHANGE_STR-MEINLIEF sy-vline 
WA_RJD_VAWERK_CHANGE_STR-XMEINLIEF_DEL sy-vline      INTO ld_text SEPARATED BY SPACE.

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