ABAP Select data from SAP table J_3RF_IT_INV 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_IT_INV 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_IT_INV. 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_IT_INV 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_IT_INV TYPE STANDARD TABLE OF J_3RF_IT_INV,
      WA_J_3RF_IT_INV TYPE J_3RF_IT_INV,
      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_IT_INV> TYPE J_3RF_IT_INV.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_3RF_IT_INV.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_3RF_IT_INV
  INTO TABLE IT_J_3RF_IT_INV.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_3RF_IT_INV
*  INTO TABLE @DATA(IT_J_3RF_IT_INV2).
*--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_IT_INV INDEX 1 INTO DATA(WA_J_3RF_IT_INV2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_3RF_IT_INV ASSIGNING <J_3RF_IT_INV>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_3RF_IT_INV>-POSNR = 1.
<J_3RF_IT_INV>-MATNR = 1.
<J_3RF_IT_INV>-ANLN1 = 1.
<J_3RF_IT_INV>-ANLN2 = 1.
<J_3RF_IT_INV>-MATNM = 1.

ENDLOOP.

LOOP AT IT_J_3RF_IT_INV INTO WA_J_3RF_IT_INV.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_3RF_IT_INV-FKIMG, sy-vline,
  WA_J_3RF_IT_INV-VRKME, sy-vline,
  WA_J_3RF_IT_INV-MSEH3, sy-vline,
  WA_J_3RF_IT_INV-ECODE, sy-vline,
  WA_J_3RF_IT_INV-MSEHT, sy-vline,
  WA_J_3RF_IT_INV-HERKL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_3RF_IT_INV 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_IT_INV 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_IT_INV INTO WA_J_3RF_IT_INV.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_IT_INV-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_IT_INV-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_IT_INV-ANLN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_IT_INV-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_IT_INV-ANLN2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_IT_INV-ANLN2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VRKME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_IT_INV-VRKME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_IT_INV-VRKME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field PRICE
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_IT_INV-PRICE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_IT_INV-PRICE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field SMNET
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_IT_INV-SMNET
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_IT_INV-SMNET.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field SMVAT
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_IT_INV-SMVAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_IT_INV-SMVAT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field TOTAL
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_IT_INV-TOTAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_IT_INV-TOTAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field SMEXC
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_IT_INV-SMEXC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_IT_INV-SMEXC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field SMNSP
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_IT_INV-SMNSP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_IT_INV-SMNSP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_IT_INV-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_IT_INV-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_IT_INV-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_IT_INV-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBEL2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_IT_INV-VBEL2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_IT_INV-VBEL2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EXT_EBELP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RF_IT_INV-EXT_EBELP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RF_IT_INV-EXT_EBELP.
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_IT_INV_STR, 
POSNR TYPE STRING,
MATNR TYPE STRING,
ANLN1 TYPE STRING,
ANLN2 TYPE STRING,
MATNM TYPE STRING,
FKIMG TYPE STRING,
VRKME TYPE STRING,
MSEH3 TYPE STRING,
ECODE TYPE STRING,
MSEHT TYPE STRING,
HERKL TYPE STRING,
INTCN3 TYPE STRING,
EXDAA TYPE STRING,
ALANX TYPE STRING,
WAERK TYPE STRING,
PRICE TYPE STRING,
SMNET TYPE STRING,
BEZNDS TYPE STRING,
SMVAT TYPE STRING,
VPROC TYPE STRING,
TOTAL TYPE STRING,
SMEXC TYPE STRING,
SMNSP TYPE STRING,
VBELN TYPE STRING,
VPOSN TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
VBEL2 TYPE STRING,
POSN2 TYPE STRING,
EXT_MATNR TYPE STRING,
EXT_EBELN TYPE STRING,
EXT_EBELP TYPE STRING,
EXT_BEDAT TYPE STRING,
MATNR_TYPE_CODE TYPE STRING,
WERKS TYPE STRING,
COUNTRY_CODE TYPE STRING,
COUNTRY_NAME TYPE STRING,
CCD_RNPT_DATA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_3RF_IT_INV_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_IT_INV_STR-POSNR sy-vline 
WA_J_3RF_IT_INV_STR-MATNR sy-vline 
WA_J_3RF_IT_INV_STR-ANLN1 sy-vline 
WA_J_3RF_IT_INV_STR-ANLN2 sy-vline 
WA_J_3RF_IT_INV_STR-MATNM sy-vline 
WA_J_3RF_IT_INV_STR-FKIMG sy-vline 
WA_J_3RF_IT_INV_STR-VRKME sy-vline 
WA_J_3RF_IT_INV_STR-MSEH3 sy-vline 
WA_J_3RF_IT_INV_STR-ECODE sy-vline 
WA_J_3RF_IT_INV_STR-MSEHT sy-vline 
WA_J_3RF_IT_INV_STR-HERKL sy-vline 
WA_J_3RF_IT_INV_STR-INTCN3 sy-vline 
WA_J_3RF_IT_INV_STR-EXDAA sy-vline 
WA_J_3RF_IT_INV_STR-ALANX sy-vline 
WA_J_3RF_IT_INV_STR-WAERK sy-vline 
WA_J_3RF_IT_INV_STR-PRICE sy-vline 
WA_J_3RF_IT_INV_STR-SMNET sy-vline 
WA_J_3RF_IT_INV_STR-BEZNDS sy-vline 
WA_J_3RF_IT_INV_STR-SMVAT sy-vline 
WA_J_3RF_IT_INV_STR-VPROC sy-vline 
WA_J_3RF_IT_INV_STR-TOTAL sy-vline 
WA_J_3RF_IT_INV_STR-SMEXC sy-vline 
WA_J_3RF_IT_INV_STR-SMNSP sy-vline 
WA_J_3RF_IT_INV_STR-VBELN sy-vline 
WA_J_3RF_IT_INV_STR-VPOSN sy-vline 
WA_J_3RF_IT_INV_STR-EBELN sy-vline 
WA_J_3RF_IT_INV_STR-EBELP sy-vline 
WA_J_3RF_IT_INV_STR-VBEL2 sy-vline 
WA_J_3RF_IT_INV_STR-POSN2 sy-vline 
WA_J_3RF_IT_INV_STR-EXT_MATNR sy-vline 
WA_J_3RF_IT_INV_STR-EXT_EBELN sy-vline 
WA_J_3RF_IT_INV_STR-EXT_EBELP sy-vline 
WA_J_3RF_IT_INV_STR-EXT_BEDAT sy-vline 
WA_J_3RF_IT_INV_STR-MATNR_TYPE_CODE sy-vline 
WA_J_3RF_IT_INV_STR-WERKS sy-vline 
WA_J_3RF_IT_INV_STR-COUNTRY_CODE sy-vline 
WA_J_3RF_IT_INV_STR-COUNTRY_NAME sy-vline 
WA_J_3RF_IT_INV_STR-CCD_RNPT_DATA sy-vline      INTO ld_text SEPARATED BY SPACE.

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