ABAP Select data from SAP table CCUSTALWNCITM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CCUSTALWNCITM
*  INTO TABLE @DATA(IT_CCUSTALWNCITM2).
*--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_CCUSTALWNCITM INDEX 1 INTO DATA(WA_CCUSTALWNCITM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CCUSTALWNCITM>-MANDT = 1.
<CCUSTALWNCITM>-COMPANYCODE = 1.
<CCUSTALWNCITM>-CUSTOMER = 1.
<CCUSTALWNCITM>-JOURNALENTRY = 1.
<CCUSTALWNCITM>-JOURNALENTRYITEM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CCUSTALWNCITM-FISCALYEAR, sy-vline,
  WA_CCUSTALWNCITM-GENERALLEDGERVALUATIONAREA, sy-vline,
  WA_CCUSTALWNCITM-GENERALLEDGERVALUATIONAREANAME, sy-vline,
  WA_CCUSTALWNCITM-DISPLAYCURRENCY, sy-vline,
  WA_CCUSTALWNCITM-AMOUNTINDISPLAYCURRENCY, sy-vline,
  WA_CCUSTALWNCITM-ACCOUNTINGDOCUMENTTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CCUSTALWNCITM 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_CCUSTALWNCITM 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_CCUSTALWNCITM INTO WA_CCUSTALWNCITM.


*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_CCUSTALWNCITM-CUSTOMER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CCUSTALWNCITM-CUSTOMER.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit GJAHR, internal->external for field FISCALYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_CCUSTALWNCITM-FISCALYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CCUSTALWNCITM-FISCALYEAR.
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_CCUSTALWNCITM_STR, 
MANDT TYPE STRING,
COMPANYCODE TYPE STRING,
CUSTOMER TYPE STRING,
JOURNALENTRY TYPE STRING,
JOURNALENTRYITEM TYPE STRING,
FISCALYEAR TYPE STRING,
GENERALLEDGERVALUATIONAREA TYPE STRING,
GENERALLEDGERVALUATIONAREANAME TYPE STRING,
DISPLAYCURRENCY TYPE STRING,
AMOUNTINDISPLAYCURRENCY TYPE STRING,
ACCOUNTINGDOCUMENTTYPE TYPE STRING,
ACCOUNTINGDOCUMENTTYPENAME TYPE STRING,
VALUATIONDATE TYPE STRING,
POSTINGDATE TYPE STRING,
ORIGINALREFERENCEDOCUMENT TYPE STRING,
BADDEBTRESERVEDOCUMENTCATEGORY TYPE STRING,
BADDEBTRESERVEDOCCATEGORYDESC TYPE STRING,
ASSIGNMENTREFERENCE TYPE STRING,
AUTHORIZATIONGROUP TYPE STRING,
CUSTOMERACCOUNTGROUP TYPE STRING,
CUSTOMERFINSAUTHORIZATIONGRP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CCUSTALWNCITM_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_CCUSTALWNCITM_STR-MANDT sy-vline 
WA_CCUSTALWNCITM_STR-COMPANYCODE sy-vline 
WA_CCUSTALWNCITM_STR-CUSTOMER sy-vline 
WA_CCUSTALWNCITM_STR-JOURNALENTRY sy-vline 
WA_CCUSTALWNCITM_STR-JOURNALENTRYITEM sy-vline 
WA_CCUSTALWNCITM_STR-FISCALYEAR sy-vline 
WA_CCUSTALWNCITM_STR-GENERALLEDGERVALUATIONAREA sy-vline 
WA_CCUSTALWNCITM_STR-GENERALLEDGERVALUATIONAREANAME sy-vline 
WA_CCUSTALWNCITM_STR-DISPLAYCURRENCY sy-vline 
WA_CCUSTALWNCITM_STR-AMOUNTINDISPLAYCURRENCY sy-vline 
WA_CCUSTALWNCITM_STR-ACCOUNTINGDOCUMENTTYPE sy-vline 
WA_CCUSTALWNCITM_STR-ACCOUNTINGDOCUMENTTYPENAME sy-vline 
WA_CCUSTALWNCITM_STR-VALUATIONDATE sy-vline 
WA_CCUSTALWNCITM_STR-POSTINGDATE sy-vline 
WA_CCUSTALWNCITM_STR-ORIGINALREFERENCEDOCUMENT sy-vline 
WA_CCUSTALWNCITM_STR-BADDEBTRESERVEDOCUMENTCATEGORY sy-vline 
WA_CCUSTALWNCITM_STR-BADDEBTRESERVEDOCCATEGORYDESC sy-vline 
WA_CCUSTALWNCITM_STR-ASSIGNMENTREFERENCE sy-vline 
WA_CCUSTALWNCITM_STR-AUTHORIZATIONGROUP sy-vline 
WA_CCUSTALWNCITM_STR-CUSTOMERACCOUNTGROUP sy-vline 
WA_CCUSTALWNCITM_STR-CUSTOMERFINSAUTHORIZATIONGRP sy-vline      INTO ld_text SEPARATED BY SPACE.

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