ABAP Select data from SAP table CCCCHNGLOG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CCCCHNGLOG
*  INTO TABLE @DATA(IT_CCCCHNGLOG2).
*--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_CCCCHNGLOG INDEX 1 INTO DATA(WA_CCCCHNGLOG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CCCCHNGLOG>-MANDT = 1.
<CCCCHNGLOG>-CONTROLLINGAREA = 1.
<CCCCHNGLOG>-COSTCENTER = 1.
<CCCCHNGLOG>-CHANGEDOCUMENTVALIDITYENDDATE = 1.
<CCCCHNGLOG>-CHANGEDOCVALIDITYSTARTDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CCCCHNGLOG-CHANGEDOCOBJECT, sy-vline,
  WA_CCCCHNGLOG-CHANGEDOCUMENT, sy-vline,
  WA_CCCCHNGLOG-COSTCENTERFIELDTECHNICALNAME, sy-vline,
  WA_CCCCHNGLOG-CHANGEDOCITEMCHANGETYPE, sy-vline,
  WA_CCCCHNGLOG-CHANGEDOCOBJECTCLASS, sy-vline,
  WA_CCCCHNGLOG-CHANGEDOCTABLETECHNICALNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CCCCHNGLOG 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_CCCCHNGLOG 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_CCCCHNGLOG INTO WA_CCCCHNGLOG.


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

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

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

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

*Conversion exit ISOLA, internal->external for field CHANGEDOCLANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_CCCCHNGLOG-CHANGEDOCLANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CCCCHNGLOG-CHANGEDOCLANGUAGE.
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_CCCCHNGLOG_STR, 
MANDT TYPE STRING,
CONTROLLINGAREA TYPE STRING,
COSTCENTER TYPE STRING,
CHANGEDOCUMENTVALIDITYENDDATE TYPE STRING,
CHANGEDOCVALIDITYSTARTDATE TYPE STRING,
CHANGEDOCOBJECT TYPE STRING,
CHANGEDOCUMENT TYPE STRING,
COSTCENTERFIELDTECHNICALNAME TYPE STRING,
CHANGEDOCITEMCHANGETYPE TYPE STRING,
CHANGEDOCOBJECTCLASS TYPE STRING,
CHANGEDOCTABLETECHNICALNAME TYPE STRING,
CHANGEDOCTABLEKEY TYPE STRING,
CHANGEDOCNEWFIELDVALUE TYPE STRING,
CHANGEDOCPREVIOUSFIELDVALUE TYPE STRING,
COSTCENTERVALIDONDATE TYPE STRING,
COMPANYCODE TYPE STRING,
CREATEDBYUSER TYPE STRING,
CHANGEDOCCREATIONDATE TYPE STRING,
CHANGEDOCCHANGETIME TYPE STRING,
ORIGINCOSTCENTER TYPE STRING,
CHANGEDOCLANGUAGE TYPE STRING,
COMPANYCODENAME TYPE STRING,
COSTCENTERNAME TYPE STRING,
CHANGEDOCUMENTTABLENAME TYPE STRING,
COSTCENTERFIELDNAME TYPE STRING,
DATABASETABLEFIELD TYPE STRING,
CHANGEDOCITEMCHANGETYPETEXT TYPE STRING,
FIRSTNAME TYPE STRING,
LASTNAME TYPE STRING,
FULLNAME TYPE STRING,
COSTCENTERVALIDITYPERIOD TYPE STRING,
LANGUAGENAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CCCCHNGLOG_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_CCCCHNGLOG_STR-MANDT sy-vline 
WA_CCCCHNGLOG_STR-CONTROLLINGAREA sy-vline 
WA_CCCCHNGLOG_STR-COSTCENTER sy-vline 
WA_CCCCHNGLOG_STR-CHANGEDOCUMENTVALIDITYENDDATE sy-vline 
WA_CCCCHNGLOG_STR-CHANGEDOCVALIDITYSTARTDATE sy-vline 
WA_CCCCHNGLOG_STR-CHANGEDOCOBJECT sy-vline 
WA_CCCCHNGLOG_STR-CHANGEDOCUMENT sy-vline 
WA_CCCCHNGLOG_STR-COSTCENTERFIELDTECHNICALNAME sy-vline 
WA_CCCCHNGLOG_STR-CHANGEDOCITEMCHANGETYPE sy-vline 
WA_CCCCHNGLOG_STR-CHANGEDOCOBJECTCLASS sy-vline 
WA_CCCCHNGLOG_STR-CHANGEDOCTABLETECHNICALNAME sy-vline 
WA_CCCCHNGLOG_STR-CHANGEDOCTABLEKEY sy-vline 
WA_CCCCHNGLOG_STR-CHANGEDOCNEWFIELDVALUE sy-vline 
WA_CCCCHNGLOG_STR-CHANGEDOCPREVIOUSFIELDVALUE sy-vline 
WA_CCCCHNGLOG_STR-COSTCENTERVALIDONDATE sy-vline 
WA_CCCCHNGLOG_STR-COMPANYCODE sy-vline 
WA_CCCCHNGLOG_STR-CREATEDBYUSER sy-vline 
WA_CCCCHNGLOG_STR-CHANGEDOCCREATIONDATE sy-vline 
WA_CCCCHNGLOG_STR-CHANGEDOCCHANGETIME sy-vline 
WA_CCCCHNGLOG_STR-ORIGINCOSTCENTER sy-vline 
WA_CCCCHNGLOG_STR-CHANGEDOCLANGUAGE sy-vline 
WA_CCCCHNGLOG_STR-COMPANYCODENAME sy-vline 
WA_CCCCHNGLOG_STR-COSTCENTERNAME sy-vline 
WA_CCCCHNGLOG_STR-CHANGEDOCUMENTTABLENAME sy-vline 
WA_CCCCHNGLOG_STR-COSTCENTERFIELDNAME sy-vline 
WA_CCCCHNGLOG_STR-DATABASETABLEFIELD sy-vline 
WA_CCCCHNGLOG_STR-CHANGEDOCITEMCHANGETYPETEXT sy-vline 
WA_CCCCHNGLOG_STR-FIRSTNAME sy-vline 
WA_CCCCHNGLOG_STR-LASTNAME sy-vline 
WA_CCCCHNGLOG_STR-FULLNAME sy-vline 
WA_CCCCHNGLOG_STR-COSTCENTERVALIDITYPERIOD sy-vline 
WA_CCCCHNGLOG_STR-LANGUAGENAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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