ABAP Select data from SAP table ISINVCITMMAT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISINVCITMMAT
*  INTO TABLE @DATA(IT_ISINVCITMMAT2).
*--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_ISINVCITMMAT INDEX 1 INTO DATA(WA_ISINVCITMMAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISINVCITMMAT>-MANDT = 1.
<ISINVCITMMAT>-SUPPLIERINVOICE = 1.
<ISINVCITMMAT>-FISCALYEAR = 1.
<ISINVCITMMAT>-SUPPLIERINVOICEITEM = 1.
<ISINVCITMMAT>-DOCUMENTCURRENCY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISINVCITMMAT-SUPPLIERINVOICEITEMAMOUNT, sy-vline,
  WA_ISINVCITMMAT-DEBITCREDITCODE, sy-vline,
  WA_ISINVCITMMAT-MATERIAL, sy-vline,
  WA_ISINVCITMMAT-VALUATIONAREA, sy-vline,
  WA_ISINVCITMMAT-QUANTITYUNIT, sy-vline,
  WA_ISINVCITMMAT-INVENTORYVALUATIONTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISINVCITMMAT 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_ISINVCITMMAT 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_ISINVCITMMAT INTO WA_ISINVCITMMAT.


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

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

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

*Conversion exit CUNIT, internal->external for field QUANTITYUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ISINVCITMMAT-QUANTITYUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISINVCITMMAT-QUANTITYUNIT.
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_ISINVCITMMAT_STR, 
MANDT TYPE STRING,
SUPPLIERINVOICE TYPE STRING,
FISCALYEAR TYPE STRING,
SUPPLIERINVOICEITEM TYPE STRING,
DOCUMENTCURRENCY TYPE STRING,
SUPPLIERINVOICEITEMAMOUNT TYPE STRING,
DEBITCREDITCODE TYPE STRING,
MATERIAL TYPE STRING,
VALUATIONAREA TYPE STRING,
QUANTITYUNIT TYPE STRING,
INVENTORYVALUATIONTYPE TYPE STRING,
QUANTITY TYPE STRING,
TAXCODE TYPE STRING,
TAXJURISDICTION TYPE STRING,
ISNOTCASHDISCOUNTLIABLE TYPE STRING,
TAXCOUNTRY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISINVCITMMAT_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_ISINVCITMMAT_STR-MANDT sy-vline 
WA_ISINVCITMMAT_STR-SUPPLIERINVOICE sy-vline 
WA_ISINVCITMMAT_STR-FISCALYEAR sy-vline 
WA_ISINVCITMMAT_STR-SUPPLIERINVOICEITEM sy-vline 
WA_ISINVCITMMAT_STR-DOCUMENTCURRENCY sy-vline 
WA_ISINVCITMMAT_STR-SUPPLIERINVOICEITEMAMOUNT sy-vline 
WA_ISINVCITMMAT_STR-DEBITCREDITCODE sy-vline 
WA_ISINVCITMMAT_STR-MATERIAL sy-vline 
WA_ISINVCITMMAT_STR-VALUATIONAREA sy-vline 
WA_ISINVCITMMAT_STR-QUANTITYUNIT sy-vline 
WA_ISINVCITMMAT_STR-INVENTORYVALUATIONTYPE sy-vline 
WA_ISINVCITMMAT_STR-QUANTITY sy-vline 
WA_ISINVCITMMAT_STR-TAXCODE sy-vline 
WA_ISINVCITMMAT_STR-TAXJURISDICTION sy-vline 
WA_ISINVCITMMAT_STR-ISNOTCASHDISCOUNTLIABLE sy-vline 
WA_ISINVCITMMAT_STR-TAXCOUNTRY sy-vline      INTO ld_text SEPARATED BY SPACE.

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