ABAP Select data from SAP table RKZ_OBJST into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RKZ_OBJST
*  INTO TABLE @DATA(IT_RKZ_OBJST2).
*--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_RKZ_OBJST INDEX 1 INTO DATA(WA_RKZ_OBJST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RKZ_OBJST>-OBJKT = 1.
<RKZ_OBJST>-ADBNA = 1.
<RKZ_OBJST>-UDBNA = 1.
<RKZ_OBJST>-AKTIV = 1.
<RKZ_OBJST>-RECNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RKZ_OBJST-STUFE, sy-vline,
  WA_RKZ_OBJST-DBNA1, sy-vline,
  WA_RKZ_OBJST-DBNA2, sy-vline,
  WA_RKZ_OBJST-DBNA3, sy-vline,
  WA_RKZ_OBJST-DBNA4, sy-vline,
  WA_RKZ_OBJST-DBNA5, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RKZ_OBJST 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_RKZ_OBJST 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_RKZ_OBJST INTO WA_RKZ_OBJST.


*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_RKZ_OBJST_STR, 
OBJKT TYPE STRING,
ADBNA TYPE STRING,
UDBNA TYPE STRING,
AKTIV TYPE STRING,
RECNR TYPE STRING,
STUFE TYPE STRING,
DBNA1 TYPE STRING,
DBNA2 TYPE STRING,
DBNA3 TYPE STRING,
DBNA4 TYPE STRING,
DBNA5 TYPE STRING,
DBNA6 TYPE STRING,
DBNA7 TYPE STRING,
DBNA8 TYPE STRING,
DBNA9 TYPE STRING,
DBNA10 TYPE STRING,
DBNA11 TYPE STRING,
DBNA12 TYPE STRING,
TXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RKZ_OBJST_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_RKZ_OBJST_STR-OBJKT sy-vline 
WA_RKZ_OBJST_STR-ADBNA sy-vline 
WA_RKZ_OBJST_STR-UDBNA sy-vline 
WA_RKZ_OBJST_STR-AKTIV sy-vline 
WA_RKZ_OBJST_STR-RECNR sy-vline 
WA_RKZ_OBJST_STR-STUFE sy-vline 
WA_RKZ_OBJST_STR-DBNA1 sy-vline 
WA_RKZ_OBJST_STR-DBNA2 sy-vline 
WA_RKZ_OBJST_STR-DBNA3 sy-vline 
WA_RKZ_OBJST_STR-DBNA4 sy-vline 
WA_RKZ_OBJST_STR-DBNA5 sy-vline 
WA_RKZ_OBJST_STR-DBNA6 sy-vline 
WA_RKZ_OBJST_STR-DBNA7 sy-vline 
WA_RKZ_OBJST_STR-DBNA8 sy-vline 
WA_RKZ_OBJST_STR-DBNA9 sy-vline 
WA_RKZ_OBJST_STR-DBNA10 sy-vline 
WA_RKZ_OBJST_STR-DBNA11 sy-vline 
WA_RKZ_OBJST_STR-DBNA12 sy-vline 
WA_RKZ_OBJST_STR-TXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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