ABAP Select data from SAP table J_3RM_RN_ITEM_DETAILS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_3RM_RN_ITEM_DETAILS 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_3RM_RN_ITEM_DETAILS. 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_3RM_RN_ITEM_DETAILS 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_3RM_RN_ITEM_DETAILS TYPE STANDARD TABLE OF J_3RM_RN_ITEM_DETAILS,
      WA_J_3RM_RN_ITEM_DETAILS TYPE J_3RM_RN_ITEM_DETAILS,
      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_3RM_RN_ITEM_DETAILS> TYPE J_3RM_RN_ITEM_DETAILS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_3RM_RN_ITEM_DETAILS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_3RM_RN_ITEM_DETAILS
  INTO TABLE IT_J_3RM_RN_ITEM_DETAILS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_3RM_RN_ITEM_DETAILS
*  INTO TABLE @DATA(IT_J_3RM_RN_ITEM_DETAILS2).
*--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_3RM_RN_ITEM_DETAILS INDEX 1 INTO DATA(WA_J_3RM_RN_ITEM_DETAILS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_3RM_RN_ITEM_DETAILS ASSIGNING <J_3RM_RN_ITEM_DETAILS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_3RM_RN_ITEM_DETAILS>-MANDT = 1.
<J_3RM_RN_ITEM_DETAILS>-RN_REG_ID = 1.
<J_3RM_RN_ITEM_DETAILS>-RN_REG_YEAR = 1.
<J_3RM_RN_ITEM_DETAILS>-RN_REG_MOVMNT = 1.
<J_3RM_RN_ITEM_DETAILS>-PRIM_DOC_TYPE = 1.

ENDLOOP.

LOOP AT IT_J_3RM_RN_ITEM_DETAILS INTO WA_J_3RM_RN_ITEM_DETAILS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_3RM_RN_ITEM_DETAILS-PRIM_DOC_NUM, sy-vline,
  WA_J_3RM_RN_ITEM_DETAILS-PRIM_DOC_YEAR, sy-vline,
  WA_J_3RM_RN_ITEM_DETAILS-PRIM_DOC_POS, sy-vline,
  WA_J_3RM_RN_ITEM_DETAILS-MM_INVOICE_NUM, sy-vline,
  WA_J_3RM_RN_ITEM_DETAILS-MM_INVOICE_YEAR, sy-vline,
  WA_J_3RM_RN_ITEM_DETAILS-MM_INVOICE_POS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_3RM_RN_ITEM_DETAILS 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_3RM_RN_ITEM_DETAILS 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_3RM_RN_ITEM_DETAILS INTO WA_J_3RM_RN_ITEM_DETAILS.


*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 RN_REG_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RM_RN_ITEM_DETAILS-RN_REG_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RM_RN_ITEM_DETAILS-RN_REG_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field RN_REG_YEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_J_3RM_RN_ITEM_DETAILS-RN_REG_YEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RM_RN_ITEM_DETAILS-RN_REG_YEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRIM_DOC_NUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RM_RN_ITEM_DETAILS-PRIM_DOC_NUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RM_RN_ITEM_DETAILS-PRIM_DOC_NUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field PRIM_DOC_YEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_J_3RM_RN_ITEM_DETAILS-PRIM_DOC_YEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RM_RN_ITEM_DETAILS-PRIM_DOC_YEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MM_INVOICE_NUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RM_RN_ITEM_DETAILS-MM_INVOICE_NUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RM_RN_ITEM_DETAILS-MM_INVOICE_NUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field MM_INVOICE_YEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_J_3RM_RN_ITEM_DETAILS-MM_INVOICE_YEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RM_RN_ITEM_DETAILS-MM_INVOICE_YEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FI_INVOICE_NUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RM_RN_ITEM_DETAILS-FI_INVOICE_NUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RM_RN_ITEM_DETAILS-FI_INVOICE_NUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field FI_INVOICE_YEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_J_3RM_RN_ITEM_DETAILS-FI_INVOICE_YEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RM_RN_ITEM_DETAILS-FI_INVOICE_YEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_J_3RM_RN_ITEM_DETAILS-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RM_RN_ITEM_DETAILS-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RM_RN_ITEM_DETAILS-MBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RM_RN_ITEM_DETAILS-MBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field MYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_J_3RM_RN_ITEM_DETAILS-MYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RM_RN_ITEM_DETAILS-MYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BILLING
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RM_RN_ITEM_DETAILS-BILLING
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RM_RN_ITEM_DETAILS-BILLING.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field IMCD_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RM_RN_ITEM_DETAILS-IMCD_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RM_RN_ITEM_DETAILS-IMCD_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field IBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RM_RN_ITEM_DETAILS-IBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RM_RN_ITEM_DETAILS-IBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field IGJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_J_3RM_RN_ITEM_DETAILS-IGJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RM_RN_ITEM_DETAILS-IGJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ACC_BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RM_RN_ITEM_DETAILS-ACC_BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RM_RN_ITEM_DETAILS-ACC_BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field ACC_GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_J_3RM_RN_ITEM_DETAILS-ACC_GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RM_RN_ITEM_DETAILS-ACC_GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PO_NUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RM_RN_ITEM_DETAILS-PO_NUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RM_RN_ITEM_DETAILS-PO_NUM.
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_3RM_RN_ITEM_DETAILS_STR, 
MANDT TYPE STRING,
RN_REG_ID TYPE STRING,
RN_REG_YEAR TYPE STRING,
RN_REG_MOVMNT TYPE STRING,
PRIM_DOC_TYPE TYPE STRING,
PRIM_DOC_NUM TYPE STRING,
PRIM_DOC_YEAR TYPE STRING,
PRIM_DOC_POS TYPE STRING,
MM_INVOICE_NUM TYPE STRING,
MM_INVOICE_YEAR TYPE STRING,
MM_INVOICE_POS TYPE STRING,
FI_INVOICE_NUM TYPE STRING,
FI_INVOICE_YEAR TYPE STRING,
MENGE TYPE STRING,
TNVED TYPE STRING,
OKPD2 TYPE STRING,
CANCELLED_BY TYPE STRING,
CREATED_BY TYPE STRING,
CREATED_ON TYPE STRING,
MANUALLY_CREATED TYPE STRING,
MATNR TYPE STRING,
COMPANY_CODE TYPE STRING,
COUNTRY_OF_ORIGIN TYPE STRING,
BATCH TYPE STRING,
SERIAL_NUMBER TYPE STRING,
MBLNR TYPE STRING,
MYEAR TYPE STRING,
MPOS TYPE STRING,
BILLING TYPE STRING,
BILLING_POS TYPE STRING,
IMCD_ID TYPE STRING,
IMCD_POS TYPE STRING,
IBLNR TYPE STRING,
IGJAHR TYPE STRING,
IPOS TYPE STRING,
ACC_BELNR TYPE STRING,
ACC_GJAHR TYPE STRING,
ACC_POS TYPE STRING,
PO_NUM TYPE STRING,
PO_POS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_3RM_RN_ITEM_DETAILS_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_3RM_RN_ITEM_DETAILS_STR-MANDT sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-RN_REG_ID sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-RN_REG_YEAR sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-RN_REG_MOVMNT sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-PRIM_DOC_TYPE sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-PRIM_DOC_NUM sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-PRIM_DOC_YEAR sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-PRIM_DOC_POS sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-MM_INVOICE_NUM sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-MM_INVOICE_YEAR sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-MM_INVOICE_POS sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-FI_INVOICE_NUM sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-FI_INVOICE_YEAR sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-MENGE sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-TNVED sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-OKPD2 sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-CANCELLED_BY sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-CREATED_BY sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-CREATED_ON sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-MANUALLY_CREATED sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-MATNR sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-COMPANY_CODE sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-COUNTRY_OF_ORIGIN sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-BATCH sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-SERIAL_NUMBER sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-MBLNR sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-MYEAR sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-MPOS sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-BILLING sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-BILLING_POS sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-IMCD_ID sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-IMCD_POS sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-IBLNR sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-IGJAHR sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-IPOS sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-ACC_BELNR sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-ACC_GJAHR sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-ACC_POS sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-PO_NUM sy-vline 
WA_J_3RM_RN_ITEM_DETAILS_STR-PO_POS sy-vline      INTO ld_text SEPARATED BY SPACE.

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