ABAP Select data from SAP table ICADOCHEADER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICADOCHEADER
*  INTO TABLE @DATA(IT_ICADOCHEADER2).
*--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_ICADOCHEADER INDEX 1 INTO DATA(WA_ICADOCHEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICADOCHEADER>-MANDT = 1.
<ICADOCHEADER>-CADOCUMENTNUMBER = 1.
<ICADOCHEADER>-CREATEDBYUSER = 1.
<ICADOCHEADER>-CREATIONDATE = 1.
<ICADOCHEADER>-CREATIONTIME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICADOCHEADER-CATAXCOMPANYCODE, sy-vline,
  WA_ICADOCHEADER-CASTORAGELOCATIONOFTAXSUPLMNT, sy-vline,
  WA_ICADOCHEADER-CATAXCODEWASEXCHANGED, sy-vline,
  WA_ICADOCHEADER-TAXREPORTINGDATE, sy-vline,
  WA_ICADOCHEADER-CARECONCILIATIONKEY, sy-vline,
  WA_ICADOCHEADER-CASEPARATEDOCISCREATEDINGL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICADOCHEADER 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_ICADOCHEADER 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_ICADOCHEADER INTO WA_ICADOCHEADER.


*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_ICADOCHEADER-CADOCUMENTNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICADOCHEADER-CADOCUMENTNUMBER.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field LOGICALSYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICADOCHEADER-LOGICALSYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICADOCHEADER-LOGICALSYSTEM.
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_ICADOCHEADER_STR, 
MANDT TYPE STRING,
CADOCUMENTNUMBER TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATE TYPE STRING,
CREATIONTIME TYPE STRING,
CATAXCOMPANYCODE TYPE STRING,
CASTORAGELOCATIONOFTAXSUPLMNT TYPE STRING,
CATAXCODEWASEXCHANGED TYPE STRING,
TAXREPORTINGDATE TYPE STRING,
CARECONCILIATIONKEY TYPE STRING,
CASEPARATEDOCISCREATEDINGL TYPE STRING,
CAREQUESTEDPERIODFORGLTRANSFER TYPE STRING,
CAAPPLICATIONAREA TYPE STRING,
CADOCUMENTTYPE TYPE STRING,
CADOCUMENTORIGINCODE TYPE STRING,
CADOCUMENTORIGINCODENAME TYPE STRING,
TRANSACTIONCURRENCY TYPE STRING,
DOCUMENTDATE TYPE STRING,
CAPOSTINGDATE TYPE STRING,
EXCHANGERATEDATE TYPE STRING,
CAREFERENCEDOCUMENT TYPE STRING,
CARETURNREASON TYPE STRING,
CAPOSTINGREASON TYPE STRING,
REFERENCEDOCUMENTTYPE TYPE STRING,
ORIGINALREFERENCEDOCUMENT TYPE STRING,
CAREVERSEDDOCUMENTNUMBER TYPE STRING,
CACLEARINGINFORMATION TYPE STRING,
CAREVERSALDOCUMENTNUMBER TYPE STRING,
CADOCUMENTSUPPLEMENTS TYPE STRING,
LOGICALSYSTEM TYPE STRING,
CAWORKFLOWCHECKREASON TYPE STRING,
CAWORKFLOWCHECKPROCESS TYPE STRING,
CADOCUMENTTRANSACTIONCLASS TYPE STRING,
CADOCCONTAINSCASHFLOWITEMS TYPE STRING,
CADOCUMENTCLASS TYPE STRING,
CADOCUMENTVERSION TYPE STRING,
ISINDIVIDUALPOSTING TYPE STRING,
CADOCUMENTISAGED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICADOCHEADER_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_ICADOCHEADER_STR-MANDT sy-vline 
WA_ICADOCHEADER_STR-CADOCUMENTNUMBER sy-vline 
WA_ICADOCHEADER_STR-CREATEDBYUSER sy-vline 
WA_ICADOCHEADER_STR-CREATIONDATE sy-vline 
WA_ICADOCHEADER_STR-CREATIONTIME sy-vline 
WA_ICADOCHEADER_STR-CATAXCOMPANYCODE sy-vline 
WA_ICADOCHEADER_STR-CASTORAGELOCATIONOFTAXSUPLMNT sy-vline 
WA_ICADOCHEADER_STR-CATAXCODEWASEXCHANGED sy-vline 
WA_ICADOCHEADER_STR-TAXREPORTINGDATE sy-vline 
WA_ICADOCHEADER_STR-CARECONCILIATIONKEY sy-vline 
WA_ICADOCHEADER_STR-CASEPARATEDOCISCREATEDINGL sy-vline 
WA_ICADOCHEADER_STR-CAREQUESTEDPERIODFORGLTRANSFER sy-vline 
WA_ICADOCHEADER_STR-CAAPPLICATIONAREA sy-vline 
WA_ICADOCHEADER_STR-CADOCUMENTTYPE sy-vline 
WA_ICADOCHEADER_STR-CADOCUMENTORIGINCODE sy-vline 
WA_ICADOCHEADER_STR-CADOCUMENTORIGINCODENAME sy-vline 
WA_ICADOCHEADER_STR-TRANSACTIONCURRENCY sy-vline 
WA_ICADOCHEADER_STR-DOCUMENTDATE sy-vline 
WA_ICADOCHEADER_STR-CAPOSTINGDATE sy-vline 
WA_ICADOCHEADER_STR-EXCHANGERATEDATE sy-vline 
WA_ICADOCHEADER_STR-CAREFERENCEDOCUMENT sy-vline 
WA_ICADOCHEADER_STR-CARETURNREASON sy-vline 
WA_ICADOCHEADER_STR-CAPOSTINGREASON sy-vline 
WA_ICADOCHEADER_STR-REFERENCEDOCUMENTTYPE sy-vline 
WA_ICADOCHEADER_STR-ORIGINALREFERENCEDOCUMENT sy-vline 
WA_ICADOCHEADER_STR-CAREVERSEDDOCUMENTNUMBER sy-vline 
WA_ICADOCHEADER_STR-CACLEARINGINFORMATION sy-vline 
WA_ICADOCHEADER_STR-CAREVERSALDOCUMENTNUMBER sy-vline 
WA_ICADOCHEADER_STR-CADOCUMENTSUPPLEMENTS sy-vline 
WA_ICADOCHEADER_STR-LOGICALSYSTEM sy-vline 
WA_ICADOCHEADER_STR-CAWORKFLOWCHECKREASON sy-vline 
WA_ICADOCHEADER_STR-CAWORKFLOWCHECKPROCESS sy-vline 
WA_ICADOCHEADER_STR-CADOCUMENTTRANSACTIONCLASS sy-vline 
WA_ICADOCHEADER_STR-CADOCCONTAINSCASHFLOWITEMS sy-vline 
WA_ICADOCHEADER_STR-CADOCUMENTCLASS sy-vline 
WA_ICADOCHEADER_STR-CADOCUMENTVERSION sy-vline 
WA_ICADOCHEADER_STR-ISINDIVIDUALPOSTING sy-vline 
WA_ICADOCHEADER_STR-CADOCUMENTISAGED sy-vline      INTO ld_text SEPARATED BY SPACE.

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