ABAP Select data from SAP table MSR_RFC_RO_ITEM_COMC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MSR_RFC_RO_ITEM_COMC
*  INTO TABLE @DATA(IT_MSR_RFC_RO_ITEM_COMC2).
*--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_MSR_RFC_RO_ITEM_COMC INDEX 1 INTO DATA(WA_MSR_RFC_RO_ITEM_COMC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MSR_RFC_RO_ITEM_COMC>-ITM_NUMBER = 1.
<MSR_RFC_RO_ITEM_COMC>-HG_LV_ITEM = 1.
<MSR_RFC_RO_ITEM_COMC>-MATERIAL = 1.
<MSR_RFC_RO_ITEM_COMC>-SHORT_TEXT = 1.
<MSR_RFC_RO_ITEM_COMC>-CUST_MAT35 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MSR_RFC_RO_ITEM_COMC-ITEM_CATEG, sy-vline,
  WA_MSR_RFC_RO_ITEM_COMC-REQ_QTY, sy-vline,
  WA_MSR_RFC_RO_ITEM_COMC-SALES_UNIT, sy-vline,
  WA_MSR_RFC_RO_ITEM_COMC-SALQTYNUM, sy-vline,
  WA_MSR_RFC_RO_ITEM_COMC-SALQTYDEN, sy-vline,
  WA_MSR_RFC_RO_ITEM_COMC-REQ_DATE_E, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MSR_RFC_RO_ITEM_COMC 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_MSR_RFC_RO_ITEM_COMC 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_MSR_RFC_RO_ITEM_COMC INTO WA_MSR_RFC_RO_ITEM_COMC.


*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_MSR_RFC_RO_ITEM_COMC_STR, 
ITM_NUMBER TYPE STRING,
HG_LV_ITEM TYPE STRING,
MATERIAL TYPE STRING,
SHORT_TEXT TYPE STRING,
CUST_MAT35 TYPE STRING,
ITEM_CATEG TYPE STRING,
REQ_QTY TYPE STRING,
SALES_UNIT TYPE STRING,
SALQTYNUM TYPE STRING,
SALQTYDEN TYPE STRING,
REQ_DATE_E TYPE STRING,
DATE_TYP TYPE STRING,
PLANT TYPE STRING,
STORE_LOC TYPE STRING,
SHIP_POINT TYPE STRING,
ROUTE TYPE STRING,
PO_ITM_NO TYPE STRING,
BILL_BLOCK TYPE STRING,
PURCH_NO_C TYPE STRING,
PURCH_DATE TYPE STRING,
PMNTTRMS TYPE STRING,
PRICE_DATE TYPE STRING,
EXCHG_RATE TYPE STRING,
EXCHG_RATE_EXT TYPE STRING,
BILL_DATE TYPE STRING,
INCOTERMS1 TYPE STRING,
INCOTERMS2 TYPE STRING,
REASON_REJ TYPE STRING,
DLV_PRIO TYPE STRING,
GROSS_WGHT TYPE STRING,
NET_WEIGHT TYPE STRING,
UNTOF_WGHT TYPE STRING,
VOLUME TYPE STRING,
VOLUNIT TYPE STRING,
DIVISION TYPE STRING,
ORDERID TYPE STRING,
WBS_NUMBER TYPE STRING,
PAYMETHODE TYPE STRING,
BATCH TYPE STRING,
DLV_TIME TYPE STRING,
PRICE_LIST TYPE STRING,
PRICE_GRP TYPE STRING,
SALES_DIST TYPE STRING,
CUST_GROUP TYPE STRING,
MAT_PR_GRP TYPE STRING,
PO_METHOD TYPE STRING,
SHIP_TYPE TYPE STRING,
UNLOAD_PT TYPE STRING,
REC_POINT TYPE STRING,
PRC_GROUP1 TYPE STRING,
PRC_GROUP2 TYPE STRING,
PRC_GROUP3 TYPE STRING,
PRC_GROUP4 TYPE STRING,
PRC_GROUP5 TYPE STRING,
CSTCNDGRP1 TYPE STRING,
CSTCNDGRP2 TYPE STRING,
CSTCNDGRP3 TYPE STRING,
CSTCNDGRP4 TYPE STRING,
CSTCNDGRP5 TYPE STRING,
REF_DOC TYPE STRING,
REF_DOC_IT TYPE STRING,
REQ_DATE TYPE STRING,
FIX_VAL_DY TYPE STRING,
ADD_VAL_DY TYPE STRING,
OVERDLVTOL TYPE STRING,
UNDDLV_TOL TYPE STRING,
PROD_HIERA TYPE STRING,
MATL_GROUP TYPE STRING,
PROMOTION TYPE STRING,
ASSORT_MOD TYPE STRING,
VAL_TYPE TYPE STRING,
EAN_UPC TYPE STRING,
BUS_AREA TYPE STRING,
PROFIT_CTR TYPE STRING,
RESANALKEY TYPE STRING,
CSTG_SHEET TYPE STRING,
OVERHD_KEY TYPE STRING,
SEPA_MANDATE_ID TYPE STRING,
SEPA_PAY_TYPE TYPE STRING,
SEPA_ON TYPE STRING,
WBS_NUMBER_EXT TYPE STRING,
MATERIAL_LONG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MSR_RFC_RO_ITEM_COMC_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_MSR_RFC_RO_ITEM_COMC_STR-ITM_NUMBER sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-HG_LV_ITEM sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-MATERIAL sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-SHORT_TEXT sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-CUST_MAT35 sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-ITEM_CATEG sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-REQ_QTY sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-SALES_UNIT sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-SALQTYNUM sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-SALQTYDEN sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-REQ_DATE_E sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-DATE_TYP sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-PLANT sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-STORE_LOC sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-SHIP_POINT sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-ROUTE sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-PO_ITM_NO sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-BILL_BLOCK sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-PURCH_NO_C sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-PURCH_DATE sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-PMNTTRMS sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-PRICE_DATE sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-EXCHG_RATE sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-EXCHG_RATE_EXT sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-BILL_DATE sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-INCOTERMS1 sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-INCOTERMS2 sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-REASON_REJ sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-DLV_PRIO sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-GROSS_WGHT sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-NET_WEIGHT sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-UNTOF_WGHT sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-VOLUME sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-VOLUNIT sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-DIVISION sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-ORDERID sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-WBS_NUMBER sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-PAYMETHODE sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-BATCH sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-DLV_TIME sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-PRICE_LIST sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-PRICE_GRP sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-SALES_DIST sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-CUST_GROUP sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-MAT_PR_GRP sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-PO_METHOD sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-SHIP_TYPE sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-UNLOAD_PT sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-REC_POINT sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-PRC_GROUP1 sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-PRC_GROUP2 sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-PRC_GROUP3 sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-PRC_GROUP4 sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-PRC_GROUP5 sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-CSTCNDGRP1 sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-CSTCNDGRP2 sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-CSTCNDGRP3 sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-CSTCNDGRP4 sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-CSTCNDGRP5 sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-REF_DOC sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-REF_DOC_IT sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-REQ_DATE sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-FIX_VAL_DY sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-ADD_VAL_DY sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-OVERDLVTOL sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-UNDDLV_TOL sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-PROD_HIERA sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-MATL_GROUP sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-PROMOTION sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-ASSORT_MOD sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-VAL_TYPE sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-EAN_UPC sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-BUS_AREA sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-PROFIT_CTR sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-RESANALKEY sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-CSTG_SHEET sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-OVERHD_KEY sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-SEPA_MANDATE_ID sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-SEPA_PAY_TYPE sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-SEPA_ON sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-WBS_NUMBER_EXT sy-vline 
WA_MSR_RFC_RO_ITEM_COMC_STR-MATERIAL_LONG sy-vline      INTO ld_text SEPARATED BY SPACE.

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