ABAP Select data from SAP table RJKSDWORKLIST_CHANGEFIELDS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RJKSDWORKLIST_CHANGEFIELDS
*  INTO TABLE @DATA(IT_RJKSDWORKLIST_CHANGEFIELDS2).
*--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_RJKSDWORKLIST_CHANGEFIELDS INDEX 1 INTO DATA(WA_RJKSDWORKLIST_CHANGEFIELDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RJKSDWORKLIST_CHANGEFIELDS>-DATE_FROM = 1.
<RJKSDWORKLIST_CHANGEFIELDS>-DATE_TO = 1.
<RJKSDWORKLIST_CHANGEFIELDS>-XSEQUENCE = 1.
<RJKSDWORKLIST_CHANGEFIELDS>-XPUBLDATE = 1.
<RJKSDWORKLIST_CHANGEFIELDS>-XPURCHDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RJKSDWORKLIST_CHANGEFIELDS-XONSALEDATE, sy-vline,
  WA_RJKSDWORKLIST_CHANGEFIELDS-XINITSHIPDATE, sy-vline,
  WA_RJKSDWORKLIST_CHANGEFIELDS-XISMFIRSTRETEDI, sy-vline,
  WA_RJKSDWORKLIST_CHANGEFIELDS-XISMLATESTRETEDI, sy-vline,
  WA_RJKSDWORKLIST_CHANGEFIELDS-XISMFIRSTRET, sy-vline,
  WA_RJKSDWORKLIST_CHANGEFIELDS-XISMLATESTRET, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RJKSDWORKLIST_CHANGEFIELDS 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_RJKSDWORKLIST_CHANGEFIELDS 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_RJKSDWORKLIST_CHANGEFIELDS INTO WA_RJKSDWORKLIST_CHANGEFIELDS.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_RJKSDWORKLIST_CHANGEFIELDS_STR, 
DATE_FROM TYPE STRING,
DATE_TO TYPE STRING,
XSEQUENCE TYPE STRING,
XPUBLDATE TYPE STRING,
XPURCHDATE TYPE STRING,
XONSALEDATE TYPE STRING,
XINITSHIPDATE TYPE STRING,
XISMFIRSTRETEDI TYPE STRING,
XISMLATESTRETEDI TYPE STRING,
XISMFIRSTRET TYPE STRING,
XISMLATESTRET TYPE STRING,
XISMARRIVALDATEPL TYPE STRING,
XISMRETURNBEGIN TYPE STRING,
XISMRETURNEND TYPE STRING,
XISMOFFSALEDATE TYPE STRING,
XERFDATE TYPE STRING,
XINCL_PHASES TYPE STRING,
XEXCL_PHASES TYPE STRING,
XWITHOUT_PHASES TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RJKSDWORKLIST_CHANGEFIELDS_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_RJKSDWORKLIST_CHANGEFIELDS_STR-DATE_FROM sy-vline 
WA_RJKSDWORKLIST_CHANGEFIELDS_STR-DATE_TO sy-vline 
WA_RJKSDWORKLIST_CHANGEFIELDS_STR-XSEQUENCE sy-vline 
WA_RJKSDWORKLIST_CHANGEFIELDS_STR-XPUBLDATE sy-vline 
WA_RJKSDWORKLIST_CHANGEFIELDS_STR-XPURCHDATE sy-vline 
WA_RJKSDWORKLIST_CHANGEFIELDS_STR-XONSALEDATE sy-vline 
WA_RJKSDWORKLIST_CHANGEFIELDS_STR-XINITSHIPDATE sy-vline 
WA_RJKSDWORKLIST_CHANGEFIELDS_STR-XISMFIRSTRETEDI sy-vline 
WA_RJKSDWORKLIST_CHANGEFIELDS_STR-XISMLATESTRETEDI sy-vline 
WA_RJKSDWORKLIST_CHANGEFIELDS_STR-XISMFIRSTRET sy-vline 
WA_RJKSDWORKLIST_CHANGEFIELDS_STR-XISMLATESTRET sy-vline 
WA_RJKSDWORKLIST_CHANGEFIELDS_STR-XISMARRIVALDATEPL sy-vline 
WA_RJKSDWORKLIST_CHANGEFIELDS_STR-XISMRETURNBEGIN sy-vline 
WA_RJKSDWORKLIST_CHANGEFIELDS_STR-XISMRETURNEND sy-vline 
WA_RJKSDWORKLIST_CHANGEFIELDS_STR-XISMOFFSALEDATE sy-vline 
WA_RJKSDWORKLIST_CHANGEFIELDS_STR-XERFDATE sy-vline 
WA_RJKSDWORKLIST_CHANGEFIELDS_STR-XINCL_PHASES sy-vline 
WA_RJKSDWORKLIST_CHANGEFIELDS_STR-XEXCL_PHASES sy-vline 
WA_RJKSDWORKLIST_CHANGEFIELDS_STR-XWITHOUT_PHASES sy-vline      INTO ld_text SEPARATED BY SPACE.

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