ABAP Select data from SAP table J_3RF_REGINV_LINKS_TRACE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_3RF_REGINV_LINKS_TRACE 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 J_3RF_REGINV_LINKS_TRACE. 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 J_3RF_REGINV_LINKS_TRACE 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_J_3RF_REGINV_LINKS_TRACE TYPE STANDARD TABLE OF J_3RF_REGINV_LINKS_TRACE,
      WA_J_3RF_REGINV_LINKS_TRACE TYPE J_3RF_REGINV_LINKS_TRACE,
      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: <J_3RF_REGINV_LINKS_TRACE> TYPE J_3RF_REGINV_LINKS_TRACE.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_3RF_REGINV_LINKS_TRACE.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_3RF_REGINV_LINKS_TRACE
  INTO TABLE IT_J_3RF_REGINV_LINKS_TRACE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_3RF_REGINV_LINKS_TRACE
*  INTO TABLE @DATA(IT_J_3RF_REGINV_LINKS_TRACE2).
*--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_J_3RF_REGINV_LINKS_TRACE INDEX 1 INTO DATA(WA_J_3RF_REGINV_LINKS_TRACE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_3RF_REGINV_LINKS_TRACE ASSIGNING <J_3RF_REGINV_LINKS_TRACE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_3RF_REGINV_LINKS_TRACE>-BUKRS = 1.
<J_3RF_REGINV_LINKS_TRACE>-BELNR = 1.
<J_3RF_REGINV_LINKS_TRACE>-GJAHR = 1.
<J_3RF_REGINV_LINKS_TRACE>-BUZEI = 1.
<J_3RF_REGINV_LINKS_TRACE>-NUM = 1.

ENDLOOP.

LOOP AT IT_J_3RF_REGINV_LINKS_TRACE INTO WA_J_3RF_REGINV_LINKS_TRACE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_3RF_REGINV_LINKS_TRACE-NUM_GJAHR, sy-vline,
  WA_J_3RF_REGINV_LINKS_TRACE-EXT_ORIG, sy-vline,
  WA_J_3RF_REGINV_LINKS_TRACE-REVNO, sy-vline,
  WA_J_3RF_REGINV_LINKS_TRACE-POSNR, sy-vline,
  WA_J_3RF_REGINV_LINKS_TRACE-BELNR_ORIG, sy-vline,
  WA_J_3RF_REGINV_LINKS_TRACE-GJAHR_ORIG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_3RF_REGINV_LINKS_TRACE 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_J_3RF_REGINV_LINKS_TRACE 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_J_3RF_REGINV_LINKS_TRACE INTO WA_J_3RF_REGINV_LINKS_TRACE.


*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 BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_REGINV_LINKS_TRACE-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_REGINV_LINKS_TRACE-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_REGINV_LINKS_TRACE-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_REGINV_LINKS_TRACE-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field NUM_GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_REGINV_LINKS_TRACE-NUM_GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_REGINV_LINKS_TRACE-NUM_GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELNR_ORIG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_REGINV_LINKS_TRACE-BELNR_ORIG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_REGINV_LINKS_TRACE-BELNR_ORIG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR_ORIG
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_REGINV_LINKS_TRACE-GJAHR_ORIG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_REGINV_LINKS_TRACE-GJAHR_ORIG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELNR_CORR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_REGINV_LINKS_TRACE-BELNR_CORR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_REGINV_LINKS_TRACE-BELNR_CORR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR_CORR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_REGINV_LINKS_TRACE-GJAHR_CORR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_REGINV_LINKS_TRACE-GJAHR_CORR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELNR_REV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_REGINV_LINKS_TRACE-BELNR_REV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_REGINV_LINKS_TRACE-BELNR_REV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR_REV
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_REGINV_LINKS_TRACE-GJAHR_REV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_REGINV_LINKS_TRACE-GJAHR_REV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_REGINV_LINKS_TRACE-MBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_REGINV_LINKS_TRACE-MBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field MJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_REGINV_LINKS_TRACE-MJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_REGINV_LINKS_TRACE-MJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_REGINV_LINKS_TRACE-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_REGINV_LINKS_TRACE-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FI_LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_REGINV_LINKS_TRACE-FI_LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_REGINV_LINKS_TRACE-FI_LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_REGINV_LINKS_TRACE-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_REGINV_LINKS_TRACE-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_REGINV_LINKS_TRACE-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_REGINV_LINKS_TRACE-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_REGINV_LINKS_TRACE-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_REGINV_LINKS_TRACE-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PS_PSP_PNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_REGINV_LINKS_TRACE-PS_PSP_PNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_REGINV_LINKS_TRACE-PS_PSP_PNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_REGINV_LINKS_TRACE-ANLN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_REGINV_LINKS_TRACE-ANLN1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_REGINV_LINKS_TRACE-ANLN2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_REGINV_LINKS_TRACE-ANLN2.
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_J_3RF_REGINV_LINKS_TRACE_STR, 
BUKRS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BUZEI TYPE STRING,
NUM TYPE STRING,
NUM_GJAHR TYPE STRING,
EXT_ORIG TYPE STRING,
REVNO TYPE STRING,
POSNR TYPE STRING,
BELNR_ORIG TYPE STRING,
GJAHR_ORIG TYPE STRING,
BUZEI_ORIG TYPE STRING,
BELNR_CORR TYPE STRING,
GJAHR_CORR TYPE STRING,
BUZEI_CORR TYPE STRING,
BELNR_REV TYPE STRING,
GJAHR_REV TYPE STRING,
BUZEI_REV TYPE STRING,
MBLNR TYPE STRING,
MJAHR TYPE STRING,
MBLNR_POS TYPE STRING,
MBLNR_BUDAT TYPE STRING,
LIFNR TYPE STRING,
OPER_TYP TYPE STRING,
COMM_TRADE TYPE STRING,
DEAL_TYPE TYPE STRING,
FI_LIFNR TYPE STRING,
BOUND TYPE STRING,
MANUALLY_SELECTED TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
CHARG TYPE STRING,
ACC_TYPE TYPE STRING,
HERKL TYPE STRING,
AUFNR TYPE STRING,
PS_PSP_PNR TYPE STRING,
ANLN1 TYPE STRING,
ANLN2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_3RF_REGINV_LINKS_TRACE_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_J_3RF_REGINV_LINKS_TRACE_STR-BUKRS sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-BELNR sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-GJAHR sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-BUZEI sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-NUM sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-NUM_GJAHR sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-EXT_ORIG sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-REVNO sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-POSNR sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-BELNR_ORIG sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-GJAHR_ORIG sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-BUZEI_ORIG sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-BELNR_CORR sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-GJAHR_CORR sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-BUZEI_CORR sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-BELNR_REV sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-GJAHR_REV sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-BUZEI_REV sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-MBLNR sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-MJAHR sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-MBLNR_POS sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-MBLNR_BUDAT sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-LIFNR sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-OPER_TYP sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-COMM_TRADE sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-DEAL_TYPE sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-FI_LIFNR sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-BOUND sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-MANUALLY_SELECTED sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-EBELN sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-EBELP sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-MATNR sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-WERKS sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-CHARG sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-ACC_TYPE sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-HERKL sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-AUFNR sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-PS_PSP_PNR sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-ANLN1 sy-vline 
WA_J_3RF_REGINV_LINKS_TRACE_STR-ANLN2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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