ABAP Select data from SAP table CCADOCREVERSE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CCADOCREVERSE
*  INTO TABLE @DATA(IT_CCADOCREVERSE2).
*--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_CCADOCREVERSE INDEX 1 INTO DATA(WA_CCADOCREVERSE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CCADOCREVERSE>-MANDT = 1.
<CCADOCREVERSE>-CADOCUMENTNUMBER = 1.
<CCADOCREVERSE>-CAREFERENCEDOCUMENT = 1.
<CCADOCREVERSE>-CADOCUMENTTYPE = 1.
<CCADOCREVERSE>-CADOCUMENTTYPENAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CCADOCREVERSE-CADOCUMENTORIGINCODE, sy-vline,
  WA_CCADOCREVERSE-CADOCUMENTORIGINCODENAME, sy-vline,
  WA_CCADOCREVERSE-CAREVERSEDDOCUMENTNUMBER, sy-vline,
  WA_CCADOCREVERSE-CAREVERSALDOCUMENTNUMBER, sy-vline,
  WA_CCADOCREVERSE-CREATEDBYUSER, sy-vline,
  WA_CCADOCREVERSE-CREATEDBYUSERNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CCADOCREVERSE 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_CCADOCREVERSE 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_CCADOCREVERSE INTO WA_CCADOCREVERSE.


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

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

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

*Conversion exit ALPHA, internal->external for field CAREVERSALDOCUMENTNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CCADOCREVERSE-CAREVERSALDOCUMENTNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CCADOCREVERSE-CAREVERSALDOCUMENTNUMBER.
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_CCADOCREVERSE_STR, 
MANDT TYPE STRING,
CADOCUMENTNUMBER TYPE STRING,
CAREFERENCEDOCUMENT TYPE STRING,
CADOCUMENTTYPE TYPE STRING,
CADOCUMENTTYPENAME TYPE STRING,
CADOCUMENTORIGINCODE TYPE STRING,
CADOCUMENTORIGINCODENAME TYPE STRING,
CAREVERSEDDOCUMENTNUMBER TYPE STRING,
CAREVERSALDOCUMENTNUMBER TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATEDBYUSERNAME TYPE STRING,
CREATIONDATE TYPE STRING,
CAPOSTINGDATE TYPE STRING,
TRANSACTIONCURRENCY TYPE STRING,
DOCUMENTDATE TYPE STRING,
CADOCUMENTISBLOCKEDFORUSER TYPE STRING,
AUTHORIZATIONGROUP TYPE STRING,
ISBUSINESSPURPOSECOMPLETED TYPE STRING,
CANUMBEROFAUTHORIZATIONGROUPS TYPE STRING,
CACLEARINGINFORMATION TYPE STRING,
CACLEARINGDOCISEXISTING TYPE STRING,
CACLARIFICATIONDOCISEXISTING TYPE STRING,
CADOCUMENTSEMANTICOBJECT TYPE STRING,
CADOCREPETITIONITEMISEXISTING TYPE STRING,
CADOCUMENTREPETITIONITEMISOPEN TYPE STRING,
CHEQUEISEXISTING TYPE STRING,
CAALLREPETITIONSAREREVERSED TYPE STRING,
CAPOSTGTOCLRFCTNACCTISALLOWED TYPE STRING,
CARECONCILIATIONKEY TYPE STRING,
CADOCUMENTCLASS TYPE STRING,
CAAPPLICATIONAREA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CCADOCREVERSE_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_CCADOCREVERSE_STR-MANDT sy-vline 
WA_CCADOCREVERSE_STR-CADOCUMENTNUMBER sy-vline 
WA_CCADOCREVERSE_STR-CAREFERENCEDOCUMENT sy-vline 
WA_CCADOCREVERSE_STR-CADOCUMENTTYPE sy-vline 
WA_CCADOCREVERSE_STR-CADOCUMENTTYPENAME sy-vline 
WA_CCADOCREVERSE_STR-CADOCUMENTORIGINCODE sy-vline 
WA_CCADOCREVERSE_STR-CADOCUMENTORIGINCODENAME sy-vline 
WA_CCADOCREVERSE_STR-CAREVERSEDDOCUMENTNUMBER sy-vline 
WA_CCADOCREVERSE_STR-CAREVERSALDOCUMENTNUMBER sy-vline 
WA_CCADOCREVERSE_STR-CREATEDBYUSER sy-vline 
WA_CCADOCREVERSE_STR-CREATEDBYUSERNAME sy-vline 
WA_CCADOCREVERSE_STR-CREATIONDATE sy-vline 
WA_CCADOCREVERSE_STR-CAPOSTINGDATE sy-vline 
WA_CCADOCREVERSE_STR-TRANSACTIONCURRENCY sy-vline 
WA_CCADOCREVERSE_STR-DOCUMENTDATE sy-vline 
WA_CCADOCREVERSE_STR-CADOCUMENTISBLOCKEDFORUSER sy-vline 
WA_CCADOCREVERSE_STR-AUTHORIZATIONGROUP sy-vline 
WA_CCADOCREVERSE_STR-ISBUSINESSPURPOSECOMPLETED sy-vline 
WA_CCADOCREVERSE_STR-CANUMBEROFAUTHORIZATIONGROUPS sy-vline 
WA_CCADOCREVERSE_STR-CACLEARINGINFORMATION sy-vline 
WA_CCADOCREVERSE_STR-CACLEARINGDOCISEXISTING sy-vline 
WA_CCADOCREVERSE_STR-CACLARIFICATIONDOCISEXISTING sy-vline 
WA_CCADOCREVERSE_STR-CADOCUMENTSEMANTICOBJECT sy-vline 
WA_CCADOCREVERSE_STR-CADOCREPETITIONITEMISEXISTING sy-vline 
WA_CCADOCREVERSE_STR-CADOCUMENTREPETITIONITEMISOPEN sy-vline 
WA_CCADOCREVERSE_STR-CHEQUEISEXISTING sy-vline 
WA_CCADOCREVERSE_STR-CAALLREPETITIONSAREREVERSED sy-vline 
WA_CCADOCREVERSE_STR-CAPOSTGTOCLRFCTNACCTISALLOWED sy-vline 
WA_CCADOCREVERSE_STR-CARECONCILIATIONKEY sy-vline 
WA_CCADOCREVERSE_STR-CADOCUMENTCLASS sy-vline 
WA_CCADOCREVERSE_STR-CAAPPLICATIONAREA sy-vline      INTO ld_text SEPARATED BY SPACE.

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