ABAP Select data from SAP table CRMT_BUPA_IL_CHANGEDOC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CRMT_BUPA_IL_CHANGEDOC
*  INTO TABLE @DATA(IT_CRMT_BUPA_IL_CHANGEDOC2).
*--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_CRMT_BUPA_IL_CHANGEDOC INDEX 1 INTO DATA(WA_CRMT_BUPA_IL_CHANGEDOC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CRMT_BUPA_IL_CHANGEDOC>-OBJECTCLAS = 1.
<CRMT_BUPA_IL_CHANGEDOC>-OBJECTID = 1.
<CRMT_BUPA_IL_CHANGEDOC>-CHANGENR = 1.
<CRMT_BUPA_IL_CHANGEDOC>-PLANCHNGNR = 1.
<CRMT_BUPA_IL_CHANGEDOC>-WAS_PLANND = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CRMT_BUPA_IL_CHANGEDOC-USERNAME, sy-vline,
  WA_CRMT_BUPA_IL_CHANGEDOC-UDATE, sy-vline,
  WA_CRMT_BUPA_IL_CHANGEDOC-UTIME, sy-vline,
  WA_CRMT_BUPA_IL_CHANGEDOC-TABFLD, sy-vline,
  WA_CRMT_BUPA_IL_CHANGEDOC-FLDTXT, sy-vline,
  WA_CRMT_BUPA_IL_CHANGEDOC-TABNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CRMT_BUPA_IL_CHANGEDOC 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_CRMT_BUPA_IL_CHANGEDOC 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_CRMT_BUPA_IL_CHANGEDOC INTO WA_CRMT_BUPA_IL_CHANGEDOC.


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

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

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

*Conversion exit DTYPE, internal->external for field FLDTYP
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_CRMT_BUPA_IL_CHANGEDOC-FLDTYP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMT_BUPA_IL_CHANGEDOC-FLDTYP.
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_CRMT_BUPA_IL_CHANGEDOC_STR, 
OBJECTCLAS TYPE STRING,
OBJECTID TYPE STRING,
CHANGENR TYPE STRING,
PLANCHNGNR TYPE STRING,
WAS_PLANND TYPE STRING,
USERNAME TYPE STRING,
UDATE TYPE STRING,
UTIME TYPE STRING,
TABFLD TYPE STRING,
FLDTXT TYPE STRING,
TABNAME TYPE STRING,
TABKEY TYPE STRING,
FNAME TYPE STRING,
DFTYPNAM TYPE STRING,
DFTYPVAL TYPE STRING,
KEYNAM TYPE STRING,
KEYVAL TYPE STRING,
TABBEZ TYPE STRING,
CHNGIND TYPE STRING,
OUTLEN TYPE STRING,
F_OLD TYPE STRING,
F_NEW TYPE STRING,
FLDTYP TYPE STRING,
FLDPOS TYPE STRING,
FLDOFF TYPE STRING,
GUID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CRMT_BUPA_IL_CHANGEDOC_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_CRMT_BUPA_IL_CHANGEDOC_STR-OBJECTCLAS sy-vline 
WA_CRMT_BUPA_IL_CHANGEDOC_STR-OBJECTID sy-vline 
WA_CRMT_BUPA_IL_CHANGEDOC_STR-CHANGENR sy-vline 
WA_CRMT_BUPA_IL_CHANGEDOC_STR-PLANCHNGNR sy-vline 
WA_CRMT_BUPA_IL_CHANGEDOC_STR-WAS_PLANND sy-vline 
WA_CRMT_BUPA_IL_CHANGEDOC_STR-USERNAME sy-vline 
WA_CRMT_BUPA_IL_CHANGEDOC_STR-UDATE sy-vline 
WA_CRMT_BUPA_IL_CHANGEDOC_STR-UTIME sy-vline 
WA_CRMT_BUPA_IL_CHANGEDOC_STR-TABFLD sy-vline 
WA_CRMT_BUPA_IL_CHANGEDOC_STR-FLDTXT sy-vline 
WA_CRMT_BUPA_IL_CHANGEDOC_STR-TABNAME sy-vline 
WA_CRMT_BUPA_IL_CHANGEDOC_STR-TABKEY sy-vline 
WA_CRMT_BUPA_IL_CHANGEDOC_STR-FNAME sy-vline 
WA_CRMT_BUPA_IL_CHANGEDOC_STR-DFTYPNAM sy-vline 
WA_CRMT_BUPA_IL_CHANGEDOC_STR-DFTYPVAL sy-vline 
WA_CRMT_BUPA_IL_CHANGEDOC_STR-KEYNAM sy-vline 
WA_CRMT_BUPA_IL_CHANGEDOC_STR-KEYVAL sy-vline 
WA_CRMT_BUPA_IL_CHANGEDOC_STR-TABBEZ sy-vline 
WA_CRMT_BUPA_IL_CHANGEDOC_STR-CHNGIND sy-vline 
WA_CRMT_BUPA_IL_CHANGEDOC_STR-OUTLEN sy-vline 
WA_CRMT_BUPA_IL_CHANGEDOC_STR-F_OLD sy-vline 
WA_CRMT_BUPA_IL_CHANGEDOC_STR-F_NEW sy-vline 
WA_CRMT_BUPA_IL_CHANGEDOC_STR-FLDTYP sy-vline 
WA_CRMT_BUPA_IL_CHANGEDOC_STR-FLDPOS sy-vline 
WA_CRMT_BUPA_IL_CHANGEDOC_STR-FLDOFF sy-vline 
WA_CRMT_BUPA_IL_CHANGEDOC_STR-GUID sy-vline      INTO ld_text SEPARATED BY SPACE.

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