ABAP Select data from SAP table OBJNRCST into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP OBJNRCST 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 OBJNRCST. 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 OBJNRCST 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_OBJNRCST TYPE STANDARD TABLE OF OBJNRCST,
      WA_OBJNRCST TYPE OBJNRCST,
      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: <OBJNRCST> TYPE OBJNRCST.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OBJNRCST
*  INTO TABLE @DATA(IT_OBJNRCST2).
*--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_OBJNRCST INDEX 1 INTO DATA(WA_OBJNRCST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OBJNRCST>-FISCVAR = 1.
<OBJNRCST>-FISCPER = 1.
<OBJNRCST>-KOKRS = 1.
<OBJNRCST>-OBJNR = 1.
<OBJNRCST>-KOSTL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OBJNRCST-LSTAR, sy-vline,
  WA_OBJNRCST-AUFNR, sy-vline,
  WA_OBJNRCST-PRZNR, sy-vline,
  WA_OBJNRCST-KSTRG, sy-vline,
  WA_OBJNRCST-POSID, sy-vline,
  WA_OBJNRCST-PKSTL_BUE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OBJNRCST 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_OBJNRCST 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_OBJNRCST INTO WA_OBJNRCST.


*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 PERI7, internal->external for field FISCPER
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_OBJNRCST-FISCPER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OBJNRCST-FISCPER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit OBJEX, internal->external for field OBJNR
CALL FUNCTION 'CONVERSION_EXIT_OBJEX_OUTPUT'
  EXPORTING
    input =                      WA_OBJNRCST-OBJNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OBJNRCST-OBJNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ABPSN, internal->external for field POSID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_OBJNRCST-POSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OBJNRCST-POSID.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit AC152, internal->external for field SWG
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_OBJNRCST-SWG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OBJNRCST-SWG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field SWF
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_OBJNRCST-SWF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OBJNRCST-SWF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field SWV
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_OBJNRCST-SWV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OBJNRCST-SWV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OBJNRCST-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OBJNRCST-MEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit BEKNZ, internal->external for field BEKNZ
CALL FUNCTION 'CONVERSION_EXIT_BEKNZ_OUTPUT'
  EXPORTING
    input =                      WA_OBJNRCST-BEKNZ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OBJNRCST-BEKNZ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBUND
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OBJNRCST-VBUND
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OBJNRCST-VBUND.
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_OBJNRCST_STR, 
FISCVAR TYPE STRING,
FISCPER TYPE STRING,
KOKRS TYPE STRING,
OBJNR TYPE STRING,
KOSTL TYPE STRING,
LSTAR TYPE STRING,
AUFNR TYPE STRING,
PRZNR TYPE STRING,
KSTRG TYPE STRING,
POSID TYPE STRING,
PKSTL_BUE TYPE STRING,
CBRKE TYPE STRING,
CBRKI TYPE STRING,
CBART TYPE STRING,
DRVTP TYPE STRING,
WRTTP TYPE STRING,
VERSN TYPE STRING,
KSTAR TYPE STRING,
PAROB TYPE STRING,
SEKNZ TYPE STRING,
VALUTYP TYPE STRING,
SWG TYPE STRING,
SWF TYPE STRING,
SWV TYPE STRING,
SME TYPE STRING,
SMA TYPE STRING,
SMEG TYPE STRING,
SMEF TYPE STRING,
SMEV TYPE STRING,
WAERS TYPE STRING,
CURTYPE TYPE STRING,
MEINH TYPE STRING,
BELTP TYPE STRING,
VRGNG TYPE STRING,
HRKFT TYPE STRING,
BEKNZ TYPE STRING,
VBUND TYPE STRING,
PARGB TYPE STRING,
USPOB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OBJNRCST_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_OBJNRCST_STR-FISCVAR sy-vline 
WA_OBJNRCST_STR-FISCPER sy-vline 
WA_OBJNRCST_STR-KOKRS sy-vline 
WA_OBJNRCST_STR-OBJNR sy-vline 
WA_OBJNRCST_STR-KOSTL sy-vline 
WA_OBJNRCST_STR-LSTAR sy-vline 
WA_OBJNRCST_STR-AUFNR sy-vline 
WA_OBJNRCST_STR-PRZNR sy-vline 
WA_OBJNRCST_STR-KSTRG sy-vline 
WA_OBJNRCST_STR-POSID sy-vline 
WA_OBJNRCST_STR-PKSTL_BUE sy-vline 
WA_OBJNRCST_STR-CBRKE sy-vline 
WA_OBJNRCST_STR-CBRKI sy-vline 
WA_OBJNRCST_STR-CBART sy-vline 
WA_OBJNRCST_STR-DRVTP sy-vline 
WA_OBJNRCST_STR-WRTTP sy-vline 
WA_OBJNRCST_STR-VERSN sy-vline 
WA_OBJNRCST_STR-KSTAR sy-vline 
WA_OBJNRCST_STR-PAROB sy-vline 
WA_OBJNRCST_STR-SEKNZ sy-vline 
WA_OBJNRCST_STR-VALUTYP sy-vline 
WA_OBJNRCST_STR-SWG sy-vline 
WA_OBJNRCST_STR-SWF sy-vline 
WA_OBJNRCST_STR-SWV sy-vline 
WA_OBJNRCST_STR-SME sy-vline 
WA_OBJNRCST_STR-SMA sy-vline 
WA_OBJNRCST_STR-SMEG sy-vline 
WA_OBJNRCST_STR-SMEF sy-vline 
WA_OBJNRCST_STR-SMEV sy-vline 
WA_OBJNRCST_STR-WAERS sy-vline 
WA_OBJNRCST_STR-CURTYPE sy-vline 
WA_OBJNRCST_STR-MEINH sy-vline 
WA_OBJNRCST_STR-BELTP sy-vline 
WA_OBJNRCST_STR-VRGNG sy-vline 
WA_OBJNRCST_STR-HRKFT sy-vline 
WA_OBJNRCST_STR-BEKNZ sy-vline 
WA_OBJNRCST_STR-VBUND sy-vline 
WA_OBJNRCST_STR-PARGB sy-vline 
WA_OBJNRCST_STR-USPOB sy-vline      INTO ld_text SEPARATED BY SPACE.

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