ABAP Select data from SAP table CRELTDBILDOCITM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CRELTDBILDOCITM
*  INTO TABLE @DATA(IT_CRELTDBILDOCITM2).
*--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_CRELTDBILDOCITM INDEX 1 INTO DATA(WA_CRELTDBILDOCITM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CRELTDBILDOCITM>-MANDT = 1.
<CRELTDBILDOCITM>-DOCRELATIONSHIPUUID = 1.
<CRELTDBILDOCITM>-BILLINGDOCUMENT = 1.
<CRELTDBILDOCITM>-BILLINGDOCUMENTITEM = 1.
<CRELTDBILDOCITM>-PRECEDINGDOCUMENT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CRELTDBILDOCITM-PRECEDINGDOCUMENTITEM, sy-vline,
  WA_CRELTDBILDOCITM-SUBSEQUENTDOCUMENT, sy-vline,
  WA_CRELTDBILDOCITM-SUBSEQUENTDOCUMENTITEM, sy-vline,
  WA_CRELTDBILDOCITM-BILLINGQUANTITY, sy-vline,
  WA_CRELTDBILDOCITM-BILLINGQUANTITYUNIT, sy-vline,
  WA_CRELTDBILDOCITM-BILLINGDOCUMENTTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CRELTDBILDOCITM 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_CRELTDBILDOCITM 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_CRELTDBILDOCITM INTO WA_CRELTDBILDOCITM.


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

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

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

*Conversion exit CUNIT, internal->external for field BILLINGQUANTITYUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CRELTDBILDOCITM-BILLINGQUANTITYUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRELTDBILDOCITM-BILLINGQUANTITYUNIT.
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_CRELTDBILDOCITM_STR, 
MANDT TYPE STRING,
DOCRELATIONSHIPUUID TYPE STRING,
BILLINGDOCUMENT TYPE STRING,
BILLINGDOCUMENTITEM TYPE STRING,
PRECEDINGDOCUMENT TYPE STRING,
PRECEDINGDOCUMENTITEM TYPE STRING,
SUBSEQUENTDOCUMENT TYPE STRING,
SUBSEQUENTDOCUMENTITEM TYPE STRING,
BILLINGQUANTITY TYPE STRING,
BILLINGQUANTITYUNIT TYPE STRING,
BILLINGDOCUMENTTYPE TYPE STRING,
BILLINGDOCUMENTDATE TYPE STRING,
OVERALLBILLINGSTATUS TYPE STRING,
ITEMNETAMOUNTOFBILLINGDOC TYPE STRING,
TRANSACTIONCURRENCY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CRELTDBILDOCITM_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_CRELTDBILDOCITM_STR-MANDT sy-vline 
WA_CRELTDBILDOCITM_STR-DOCRELATIONSHIPUUID sy-vline 
WA_CRELTDBILDOCITM_STR-BILLINGDOCUMENT sy-vline 
WA_CRELTDBILDOCITM_STR-BILLINGDOCUMENTITEM sy-vline 
WA_CRELTDBILDOCITM_STR-PRECEDINGDOCUMENT sy-vline 
WA_CRELTDBILDOCITM_STR-PRECEDINGDOCUMENTITEM sy-vline 
WA_CRELTDBILDOCITM_STR-SUBSEQUENTDOCUMENT sy-vline 
WA_CRELTDBILDOCITM_STR-SUBSEQUENTDOCUMENTITEM sy-vline 
WA_CRELTDBILDOCITM_STR-BILLINGQUANTITY sy-vline 
WA_CRELTDBILDOCITM_STR-BILLINGQUANTITYUNIT sy-vline 
WA_CRELTDBILDOCITM_STR-BILLINGDOCUMENTTYPE sy-vline 
WA_CRELTDBILDOCITM_STR-BILLINGDOCUMENTDATE sy-vline 
WA_CRELTDBILDOCITM_STR-OVERALLBILLINGSTATUS sy-vline 
WA_CRELTDBILDOCITM_STR-ITEMNETAMOUNTOFBILLINGDOC sy-vline 
WA_CRELTDBILDOCITM_STR-TRANSACTIONCURRENCY sy-vline      INTO ld_text SEPARATED BY SPACE.

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