ABAP Select data from SAP table IFIDUNLVLDISTR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IFIDUNLVLDISTR
*  INTO TABLE @DATA(IT_IFIDUNLVLDISTR2).
*--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_IFIDUNLVLDISTR INDEX 1 INTO DATA(WA_IFIDUNLVLDISTR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IFIDUNLVLDISTR>-MANDT = 1.
<IFIDUNLVLDISTR>-COMPANYCODE = 1.
<IFIDUNLVLDISTR>-CUSTOMER = 1.
<IFIDUNLVLDISTR>-DUNNINGLEVEL = 1.
<IFIDUNLVLDISTR>-COMPANYCODECURRENCY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IFIDUNLVLDISTR-EXCHANGERATETYPE, sy-vline,
  WA_IFIDUNLVLDISTR-CUSTOMERCOUNTRY, sy-vline,
  WA_IFIDUNLVLDISTR-CUSTOMERREGION, sy-vline,
  WA_IFIDUNLVLDISTR-ACCOUNTINGCLERK, sy-vline,
  WA_IFIDUNLVLDISTR-CHARTOFACCOUNTS, sy-vline,
  WA_IFIDUNLVLDISTR-RECONCILIATIONACCOUNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IFIDUNLVLDISTR 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_IFIDUNLVLDISTR 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_IFIDUNLVLDISTR INTO WA_IFIDUNLVLDISTR.


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

*Conversion exit ALPHA, internal->external for field RECONCILIATIONACCOUNT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IFIDUNLVLDISTR-RECONCILIATIONACCOUNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IFIDUNLVLDISTR-RECONCILIATIONACCOUNT.
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_IFIDUNLVLDISTR_STR, 
MANDT TYPE STRING,
COMPANYCODE TYPE STRING,
CUSTOMER TYPE STRING,
DUNNINGLEVEL TYPE STRING,
COMPANYCODECURRENCY TYPE STRING,
EXCHANGERATETYPE TYPE STRING,
CUSTOMERCOUNTRY TYPE STRING,
CUSTOMERREGION TYPE STRING,
ACCOUNTINGCLERK TYPE STRING,
CHARTOFACCOUNTS TYPE STRING,
RECONCILIATIONACCOUNT TYPE STRING,
CUSTOMERBASICAUTHORIZATIONGRP TYPE STRING,
CUSTOMERFINSAUTHORIZATIONGRP TYPE STRING,
CUSTOMERACCOUNTGROUP TYPE STRING,
CUSTOMERCLASSIFICATION TYPE STRING,
DISPLAYCURRENCY TYPE STRING,
DUNNINGLEVEL1AMTINDSPCRCY TYPE STRING,
DUNNINGLEVEL2AMTINDSPCRCY TYPE STRING,
DUNNINGLEVEL3AMTINDSPCRCY TYPE STRING,
DUNNINGLEVEL4AMTINDSPCRCY TYPE STRING,
DUNNINGLEVEL5AMTINDSPCRCY TYPE STRING,
DUNNINGLEVEL6AMTINDSPCRCY TYPE STRING,
DUNNINGLEVEL7AMTINDSPCRCY TYPE STRING,
DUNNINGLEVEL8AMTINDSPCRCY TYPE STRING,
DUNNINGLEVEL9AMTINDSPCRCY TYPE STRING,
DUNNINGLEVELRNGEAMTINDSPCRCY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IFIDUNLVLDISTR_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_IFIDUNLVLDISTR_STR-MANDT sy-vline 
WA_IFIDUNLVLDISTR_STR-COMPANYCODE sy-vline 
WA_IFIDUNLVLDISTR_STR-CUSTOMER sy-vline 
WA_IFIDUNLVLDISTR_STR-DUNNINGLEVEL sy-vline 
WA_IFIDUNLVLDISTR_STR-COMPANYCODECURRENCY sy-vline 
WA_IFIDUNLVLDISTR_STR-EXCHANGERATETYPE sy-vline 
WA_IFIDUNLVLDISTR_STR-CUSTOMERCOUNTRY sy-vline 
WA_IFIDUNLVLDISTR_STR-CUSTOMERREGION sy-vline 
WA_IFIDUNLVLDISTR_STR-ACCOUNTINGCLERK sy-vline 
WA_IFIDUNLVLDISTR_STR-CHARTOFACCOUNTS sy-vline 
WA_IFIDUNLVLDISTR_STR-RECONCILIATIONACCOUNT sy-vline 
WA_IFIDUNLVLDISTR_STR-CUSTOMERBASICAUTHORIZATIONGRP sy-vline 
WA_IFIDUNLVLDISTR_STR-CUSTOMERFINSAUTHORIZATIONGRP sy-vline 
WA_IFIDUNLVLDISTR_STR-CUSTOMERACCOUNTGROUP sy-vline 
WA_IFIDUNLVLDISTR_STR-CUSTOMERCLASSIFICATION sy-vline 
WA_IFIDUNLVLDISTR_STR-DISPLAYCURRENCY sy-vline 
WA_IFIDUNLVLDISTR_STR-DUNNINGLEVEL1AMTINDSPCRCY sy-vline 
WA_IFIDUNLVLDISTR_STR-DUNNINGLEVEL2AMTINDSPCRCY sy-vline 
WA_IFIDUNLVLDISTR_STR-DUNNINGLEVEL3AMTINDSPCRCY sy-vline 
WA_IFIDUNLVLDISTR_STR-DUNNINGLEVEL4AMTINDSPCRCY sy-vline 
WA_IFIDUNLVLDISTR_STR-DUNNINGLEVEL5AMTINDSPCRCY sy-vline 
WA_IFIDUNLVLDISTR_STR-DUNNINGLEVEL6AMTINDSPCRCY sy-vline 
WA_IFIDUNLVLDISTR_STR-DUNNINGLEVEL7AMTINDSPCRCY sy-vline 
WA_IFIDUNLVLDISTR_STR-DUNNINGLEVEL8AMTINDSPCRCY sy-vline 
WA_IFIDUNLVLDISTR_STR-DUNNINGLEVEL9AMTINDSPCRCY sy-vline 
WA_IFIDUNLVLDISTR_STR-DUNNINGLEVELRNGEAMTINDSPCRCY sy-vline      INTO ld_text SEPARATED BY SPACE.

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