ABAP Select data from SAP table MRM_S_CONS_HEADER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MRM_S_CONS_HEADER
*  INTO TABLE @DATA(IT_MRM_S_CONS_HEADER2).
*--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_MRM_S_CONS_HEADER INDEX 1 INTO DATA(WA_MRM_S_CONS_HEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MRM_S_CONS_HEADER>-OUTPUTCONTROLAPPLICATIONOBJECT = 1.
<MRM_S_CONS_HEADER>-FISCALYEAR = 1.
<MRM_S_CONS_HEADER>-SUPPLIERTAXID1 = 1.
<MRM_S_CONS_HEADER>-SUPPLIERINVOICE = 1.
<MRM_S_CONS_HEADER>-DOCUMENTDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MRM_S_CONS_HEADER-CURRENCY, sy-vline,
  WA_MRM_S_CONS_HEADER-SUPPLIER, sy-vline,
  WA_MRM_S_CONS_HEADER-ACCOUNTBYSUPPLIER, sy-vline,
  WA_MRM_S_CONS_HEADER-SUPPLIERVATREGISTRATION, sy-vline,
  WA_MRM_S_CONS_HEADER-FORMOFADDRESS, sy-vline,
  WA_MRM_S_CONS_HEADER-LASTNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MRM_S_CONS_HEADER 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_MRM_S_CONS_HEADER 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_MRM_S_CONS_HEADER INTO WA_MRM_S_CONS_HEADER.


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

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

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

*Conversion exit SXIDN, internal->external for field EMAILADDRESS
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_MRM_S_CONS_HEADER-EMAILADDRESS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MRM_S_CONS_HEADER-EMAILADDRESS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_MRM_S_CONS_HEADER-LANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MRM_S_CONS_HEADER-LANGUAGE.
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_MRM_S_CONS_HEADER_STR, 
OUTPUTCONTROLAPPLICATIONOBJECT TYPE STRING,
FISCALYEAR TYPE STRING,
SUPPLIERTAXID1 TYPE STRING,
SUPPLIERINVOICE TYPE STRING,
DOCUMENTDATE TYPE STRING,
CURRENCY TYPE STRING,
SUPPLIER TYPE STRING,
ACCOUNTBYSUPPLIER TYPE STRING,
SUPPLIERVATREGISTRATION TYPE STRING,
FORMOFADDRESS TYPE STRING,
LASTNAME TYPE STRING,
COMPANYCODECOUNTRYISOCODE TYPE STRING,
PHONENUMBER TYPE STRING,
PHONENUMBEREXTENSION TYPE STRING,
FAXNUMBER TYPE STRING,
FAXNUMBEREXTENSION TYPE STRING,
EMAILADDRESS TYPE STRING,
CUSTOMERVATREGISTRATION TYPE STRING,
LANGUAGE TYPE STRING,
SENDERCOUNTRY TYPE STRING,
ISDEBIT TYPE STRING,
DUECALCULATIONBASEDATE TYPE STRING,
SIGN TYPE STRING,
INVOICEGROSSAMOUNT TYPE STRING,
CASHDISCOUNTAMOUNT TYPE STRING,
DUMMY_MMIV_SI_S_HEADER_EEW_TR TYPE STRING,
DUMMY_MMIV_SI_S_HEADER_EEW_PS TYPE STRING,
DOCUMENTHEADERTEXT TYPE STRING,
SUPPLIERPOSTINGLINEITEMTEXT TYPE STRING,
POSTINGDATE TYPE STRING,
TOTALNETAMOUNT TYPE STRING,
SUPPLIERCLERKIDBYSUPPLIER TYPE STRING,
INVENTORYSPECIALSTOCKTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MRM_S_CONS_HEADER_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_MRM_S_CONS_HEADER_STR-OUTPUTCONTROLAPPLICATIONOBJECT sy-vline 
WA_MRM_S_CONS_HEADER_STR-FISCALYEAR sy-vline 
WA_MRM_S_CONS_HEADER_STR-SUPPLIERTAXID1 sy-vline 
WA_MRM_S_CONS_HEADER_STR-SUPPLIERINVOICE sy-vline 
WA_MRM_S_CONS_HEADER_STR-DOCUMENTDATE sy-vline 
WA_MRM_S_CONS_HEADER_STR-CURRENCY sy-vline 
WA_MRM_S_CONS_HEADER_STR-SUPPLIER sy-vline 
WA_MRM_S_CONS_HEADER_STR-ACCOUNTBYSUPPLIER sy-vline 
WA_MRM_S_CONS_HEADER_STR-SUPPLIERVATREGISTRATION sy-vline 
WA_MRM_S_CONS_HEADER_STR-FORMOFADDRESS sy-vline 
WA_MRM_S_CONS_HEADER_STR-LASTNAME sy-vline 
WA_MRM_S_CONS_HEADER_STR-COMPANYCODECOUNTRYISOCODE sy-vline 
WA_MRM_S_CONS_HEADER_STR-PHONENUMBER sy-vline 
WA_MRM_S_CONS_HEADER_STR-PHONENUMBEREXTENSION sy-vline 
WA_MRM_S_CONS_HEADER_STR-FAXNUMBER sy-vline 
WA_MRM_S_CONS_HEADER_STR-FAXNUMBEREXTENSION sy-vline 
WA_MRM_S_CONS_HEADER_STR-EMAILADDRESS sy-vline 
WA_MRM_S_CONS_HEADER_STR-CUSTOMERVATREGISTRATION sy-vline 
WA_MRM_S_CONS_HEADER_STR-LANGUAGE sy-vline 
WA_MRM_S_CONS_HEADER_STR-SENDERCOUNTRY sy-vline 
WA_MRM_S_CONS_HEADER_STR-ISDEBIT sy-vline 
WA_MRM_S_CONS_HEADER_STR-DUECALCULATIONBASEDATE sy-vline 
WA_MRM_S_CONS_HEADER_STR-SIGN sy-vline 
WA_MRM_S_CONS_HEADER_STR-INVOICEGROSSAMOUNT sy-vline 
WA_MRM_S_CONS_HEADER_STR-CASHDISCOUNTAMOUNT sy-vline 
WA_MRM_S_CONS_HEADER_STR-DUMMY_MMIV_SI_S_HEADER_EEW_TR sy-vline 
WA_MRM_S_CONS_HEADER_STR-DUMMY_MMIV_SI_S_HEADER_EEW_PS sy-vline 
WA_MRM_S_CONS_HEADER_STR-DOCUMENTHEADERTEXT sy-vline 
WA_MRM_S_CONS_HEADER_STR-SUPPLIERPOSTINGLINEITEMTEXT sy-vline 
WA_MRM_S_CONS_HEADER_STR-POSTINGDATE sy-vline 
WA_MRM_S_CONS_HEADER_STR-TOTALNETAMOUNT sy-vline 
WA_MRM_S_CONS_HEADER_STR-SUPPLIERCLERKIDBYSUPPLIER sy-vline 
WA_MRM_S_CONS_HEADER_STR-INVENTORYSPECIALSTOCKTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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