ABAP Select data from SAP table CINVGCSMOBJCHLG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CINVGCSMOBJCHLG
*  INTO TABLE @DATA(IT_CINVGCSMOBJCHLG2).
*--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_CINVGCSMOBJCHLG INDEX 1 INTO DATA(WA_CINVGCSMOBJCHLG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CINVGCSMOBJCHLG>-MANDT = 1.
<CINVGCSMOBJCHLG>-INVGCSMCHANGELOGOBJECTCLASS = 1.
<CINVGCSMOBJCHLG>-INVGCSMCHANGELOGOBJECTID = 1.
<CINVGCSMOBJCHLG>-INVGCSMCHANGELOGCHANGENUMBER = 1.
<CINVGCSMOBJCHLG>-INVGCSMCHANGELOGTABLENAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CINVGCSMOBJCHLG-INVGCSMCHANGELOGTABLEKEY, sy-vline,
  WA_CINVGCSMOBJCHLG-INVGCSMCHANGELOGFIELDNAME, sy-vline,
  WA_CINVGCSMOBJCHLG-INVGCSMCHANGELOGCHANGETYPE, sy-vline,
  WA_CINVGCSMOBJCHLG-INVGCSMRELATIONSHIPTARGETUUID, sy-vline,
  WA_CINVGCSMOBJCHLG-INVGCSMRELATIONSHIPSOURCEUUID, sy-vline,
  WA_CINVGCSMOBJCHLG-INVGCSMCHANGELOGOLDVALUE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CINVGCSMOBJCHLG 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_CINVGCSMOBJCHLG 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_CINVGCSMOBJCHLG INTO WA_CINVGCSMOBJCHLG.


*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 INVGCSMCHANGELOGCHANGENUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CINVGCSMOBJCHLG-INVGCSMCHANGELOGCHANGENUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CINVGCSMOBJCHLG-INVGCSMCHANGELOGCHANGENUMBER.
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_CINVGCSMOBJCHLG_STR, 
MANDT TYPE STRING,
INVGCSMCHANGELOGOBJECTCLASS TYPE STRING,
INVGCSMCHANGELOGOBJECTID TYPE STRING,
INVGCSMCHANGELOGCHANGENUMBER TYPE STRING,
INVGCSMCHANGELOGTABLENAME TYPE STRING,
INVGCSMCHANGELOGTABLEKEY TYPE STRING,
INVGCSMCHANGELOGFIELDNAME TYPE STRING,
INVGCSMCHANGELOGCHANGETYPE TYPE STRING,
INVGCSMRELATIONSHIPTARGETUUID TYPE STRING,
INVGCSMRELATIONSHIPSOURCEUUID TYPE STRING,
INVGCSMCHANGELOGOLDVALUE TYPE STRING,
INVGCSMCHANGELOGNEWVALUE TYPE STRING,
USERDESCRIPTION TYPE STRING,
INVGCSMCHANGELOGCREATEDBYID TYPE STRING,
INVGCSMCHANGELOGCREATEDDATE TYPE STRING,
INVGCSMCHANGELOGCREATEDTIME TYPE STRING,
INVGCSMCHANGELOGTRANSCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CINVGCSMOBJCHLG_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_CINVGCSMOBJCHLG_STR-MANDT sy-vline 
WA_CINVGCSMOBJCHLG_STR-INVGCSMCHANGELOGOBJECTCLASS sy-vline 
WA_CINVGCSMOBJCHLG_STR-INVGCSMCHANGELOGOBJECTID sy-vline 
WA_CINVGCSMOBJCHLG_STR-INVGCSMCHANGELOGCHANGENUMBER sy-vline 
WA_CINVGCSMOBJCHLG_STR-INVGCSMCHANGELOGTABLENAME sy-vline 
WA_CINVGCSMOBJCHLG_STR-INVGCSMCHANGELOGTABLEKEY sy-vline 
WA_CINVGCSMOBJCHLG_STR-INVGCSMCHANGELOGFIELDNAME sy-vline 
WA_CINVGCSMOBJCHLG_STR-INVGCSMCHANGELOGCHANGETYPE sy-vline 
WA_CINVGCSMOBJCHLG_STR-INVGCSMRELATIONSHIPTARGETUUID sy-vline 
WA_CINVGCSMOBJCHLG_STR-INVGCSMRELATIONSHIPSOURCEUUID sy-vline 
WA_CINVGCSMOBJCHLG_STR-INVGCSMCHANGELOGOLDVALUE sy-vline 
WA_CINVGCSMOBJCHLG_STR-INVGCSMCHANGELOGNEWVALUE sy-vline 
WA_CINVGCSMOBJCHLG_STR-USERDESCRIPTION sy-vline 
WA_CINVGCSMOBJCHLG_STR-INVGCSMCHANGELOGCREATEDBYID sy-vline 
WA_CINVGCSMOBJCHLG_STR-INVGCSMCHANGELOGCREATEDDATE sy-vline 
WA_CINVGCSMOBJCHLG_STR-INVGCSMCHANGELOGCREATEDTIME sy-vline 
WA_CINVGCSMOBJCHLG_STR-INVGCSMCHANGELOGTRANSCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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