ABAP Select data from SAP table ICADOCBPREPITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICADOCBPREPITEM
*  INTO TABLE @DATA(IT_ICADOCBPREPITEM2).
*--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_ICADOCBPREPITEM INDEX 1 INTO DATA(WA_ICADOCBPREPITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICADOCBPREPITEM>-MANDT = 1.
<ICADOCBPREPITEM>-CADOCUMENTNUMBER = 1.
<ICADOCBPREPITEM>-CAREPETITIONGROUP = 1.
<ICADOCBPREPITEM>-CAREPETITIONITEMNUMBER = 1.
<ICADOCBPREPITEM>-CANMBROFITEMSINREPETITIONGRP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICADOCBPREPITEM-BUSINESSPARTNER, sy-vline,
  WA_ICADOCBPREPITEM-CONTRACTACCOUNT, sy-vline,
  WA_ICADOCBPREPITEM-CASUBSTITUTEDOCUMENTNUMBER, sy-vline,
  WA_ICADOCBPREPITEM-CASUBSTITUTEDOCUMENTCATEGORY, sy-vline,
  WA_ICADOCBPREPITEM-CAPOSTINGDATE, sy-vline,
  WA_ICADOCBPREPITEM-CANETDUEDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICADOCBPREPITEM 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_ICADOCBPREPITEM 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_ICADOCBPREPITEM INTO WA_ICADOCBPREPITEM.


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

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

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

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

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

*Conversion exit ALPHA, internal->external for field CASEPAPRENOTIFICATIONNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICADOCBPREPITEM-CASEPAPRENOTIFICATIONNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICADOCBPREPITEM-CASEPAPRENOTIFICATIONNUMBER.
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_ICADOCBPREPITEM_STR, 
MANDT TYPE STRING,
CADOCUMENTNUMBER TYPE STRING,
CAREPETITIONGROUP TYPE STRING,
CAREPETITIONITEMNUMBER TYPE STRING,
CANMBROFITEMSINREPETITIONGRP TYPE STRING,
BUSINESSPARTNER TYPE STRING,
CONTRACTACCOUNT TYPE STRING,
CASUBSTITUTEDOCUMENTNUMBER TYPE STRING,
CASUBSTITUTEDOCUMENTCATEGORY TYPE STRING,
CAPOSTINGDATE TYPE STRING,
CANETDUEDATE TYPE STRING,
CACASHDISCOUNTDUEDATE TYPE STRING,
CAPERIODCODE TYPE STRING,
CACHANGEISFORBIDDEN TYPE STRING,
CACLEARINGDATE TYPE STRING,
CACLEARINGDOCUMENTNUMBER TYPE STRING,
CAPOSTINGDATEOFCLEARINGDOC TYPE STRING,
CACLEARINGREASON TYPE STRING,
CAVALUEDATEFORCLEARING TYPE STRING,
CAITEMISWITHDRAWN TYPE STRING,
CAREPETITIONITEMISRESOLVED TYPE STRING,
CACLEARINGPOSTINGISRESET TYPE STRING,
CAPAYMENTPRENOTIFICATIONCODE TYPE STRING,
CAPAYMENTPROCESSINGSTATUS TYPE STRING,
CASEPAPRENOTIFICATIONNUMBER TYPE STRING,
CASEPAPRENOTIFORIGINCODE TYPE STRING,
CASEPAPRENOTIFEXECUTIONDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICADOCBPREPITEM_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_ICADOCBPREPITEM_STR-MANDT sy-vline 
WA_ICADOCBPREPITEM_STR-CADOCUMENTNUMBER sy-vline 
WA_ICADOCBPREPITEM_STR-CAREPETITIONGROUP sy-vline 
WA_ICADOCBPREPITEM_STR-CAREPETITIONITEMNUMBER sy-vline 
WA_ICADOCBPREPITEM_STR-CANMBROFITEMSINREPETITIONGRP sy-vline 
WA_ICADOCBPREPITEM_STR-BUSINESSPARTNER sy-vline 
WA_ICADOCBPREPITEM_STR-CONTRACTACCOUNT sy-vline 
WA_ICADOCBPREPITEM_STR-CASUBSTITUTEDOCUMENTNUMBER sy-vline 
WA_ICADOCBPREPITEM_STR-CASUBSTITUTEDOCUMENTCATEGORY sy-vline 
WA_ICADOCBPREPITEM_STR-CAPOSTINGDATE sy-vline 
WA_ICADOCBPREPITEM_STR-CANETDUEDATE sy-vline 
WA_ICADOCBPREPITEM_STR-CACASHDISCOUNTDUEDATE sy-vline 
WA_ICADOCBPREPITEM_STR-CAPERIODCODE sy-vline 
WA_ICADOCBPREPITEM_STR-CACHANGEISFORBIDDEN sy-vline 
WA_ICADOCBPREPITEM_STR-CACLEARINGDATE sy-vline 
WA_ICADOCBPREPITEM_STR-CACLEARINGDOCUMENTNUMBER sy-vline 
WA_ICADOCBPREPITEM_STR-CAPOSTINGDATEOFCLEARINGDOC sy-vline 
WA_ICADOCBPREPITEM_STR-CACLEARINGREASON sy-vline 
WA_ICADOCBPREPITEM_STR-CAVALUEDATEFORCLEARING sy-vline 
WA_ICADOCBPREPITEM_STR-CAITEMISWITHDRAWN sy-vline 
WA_ICADOCBPREPITEM_STR-CAREPETITIONITEMISRESOLVED sy-vline 
WA_ICADOCBPREPITEM_STR-CACLEARINGPOSTINGISRESET sy-vline 
WA_ICADOCBPREPITEM_STR-CAPAYMENTPRENOTIFICATIONCODE sy-vline 
WA_ICADOCBPREPITEM_STR-CAPAYMENTPROCESSINGSTATUS sy-vline 
WA_ICADOCBPREPITEM_STR-CASEPAPRENOTIFICATIONNUMBER sy-vline 
WA_ICADOCBPREPITEM_STR-CASEPAPRENOTIFORIGINCODE sy-vline 
WA_ICADOCBPREPITEM_STR-CASEPAPRENOTIFEXECUTIONDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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