ABAP Select data from SAP table CVDDPBUF into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CVDDPBUF 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 CVDDPBUF. 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 CVDDPBUF 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_CVDDPBUF TYPE STANDARD TABLE OF CVDDPBUF,
      WA_CVDDPBUF TYPE CVDDPBUF,
      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: <CVDDPBUF> TYPE CVDDPBUF.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CVDDPBUF
*  INTO TABLE @DATA(IT_CVDDPBUF2).
*--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_CVDDPBUF INDEX 1 INTO DATA(WA_CVDDPBUF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CVDDPBUF>-VALFLG = 1.
<CVDDPBUF>-CHCOFLG = 1.
<CVDDPBUF>-LOCKMOD = 1.
<CVDDPBUF>-LOGLOCKMOD = 1.
<CVDDPBUF>-SAVEMOD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CVDDPBUF-SPLIT, sy-vline,
  WA_CVDDPBUF-BUF_ORIG_INDEX, sy-vline,
  WA_CVDDPBUF-CHANGENO, sy-vline,
  WA_CVDDPBUF-KEYDATE, sy-vline,
  WA_CVDDPBUF-MANDT, sy-vline,
  WA_CVDDPBUF-RECN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CVDDPBUF 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_CVDDPBUF 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_CVDDPBUF INTO WA_CVDDPBUF.


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

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

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

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

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

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

*Conversion exit ISOLA, internal->external for field TDSPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_CVDDPBUF-TDSPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CVDDPBUF-TDSPRAS.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_CVDDPBUF-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CVDDPBUF-LANGU.
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_CVDDPBUF_STR, 
VALFLG TYPE STRING,
CHCOFLG TYPE STRING,
LOCKMOD TYPE STRING,
LOGLOCKMOD TYPE STRING,
SAVEMOD TYPE STRING,
SPLIT TYPE STRING,
BUF_ORIG_INDEX TYPE STRING,
CHANGENO TYPE STRING,
KEYDATE TYPE STRING,
MANDT TYPE STRING,
RECN TYPE STRING,
ACTN TYPE STRING,
VALFR TYPE STRING,
VALTO TYPE STRING,
AENNR TYPE STRING,
DELFLG TYPE STRING,
PARKFLG TYPE STRING,
CRDAT TYPE STRING,
CRNAM TYPE STRING,
UPDDAT TYPE STRING,
UPDNAM TYPE STRING,
SRSID TYPE STRING,
OWNID TYPE STRING,
RECNROOT TYPE STRING,
OBJECT TYPE STRING,
ATTRIB TYPE STRING,
ORD TYPE STRING,
VALUETYPE TYPE STRING,
VALUE TYPE STRING,
TDOBJECT TYPE STRING,
TDID TYPE STRING,
TDNAME TYPE STRING,
TDSPRAS TYPE STRING,
REPPARAFLG TYPE STRING,
VALUECHFLG TYPE STRING,
DEFPARAFLG TYPE STRING,
APPLOBJKEYFLG TYPE STRING,
LSYFKPA TYPE STRING,
REQUIREDFLG TYPE STRING,
SHOWONLYFLG TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
PARHIER TYPE STRING,
PAROBJ TYPE STRING,
PAROBJKEY TYPE STRING,
PAROBJPAR TYPE STRING,
PAROBJPARKEY TYPE STRING,
LENRECD TYPE STRING,
FILEP TYPE STRING,
LANGU TYPE STRING,
RVLID TYPE STRING,
SORT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CVDDPBUF_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_CVDDPBUF_STR-VALFLG sy-vline 
WA_CVDDPBUF_STR-CHCOFLG sy-vline 
WA_CVDDPBUF_STR-LOCKMOD sy-vline 
WA_CVDDPBUF_STR-LOGLOCKMOD sy-vline 
WA_CVDDPBUF_STR-SAVEMOD sy-vline 
WA_CVDDPBUF_STR-SPLIT sy-vline 
WA_CVDDPBUF_STR-BUF_ORIG_INDEX sy-vline 
WA_CVDDPBUF_STR-CHANGENO sy-vline 
WA_CVDDPBUF_STR-KEYDATE sy-vline 
WA_CVDDPBUF_STR-MANDT sy-vline 
WA_CVDDPBUF_STR-RECN sy-vline 
WA_CVDDPBUF_STR-ACTN sy-vline 
WA_CVDDPBUF_STR-VALFR sy-vline 
WA_CVDDPBUF_STR-VALTO sy-vline 
WA_CVDDPBUF_STR-AENNR sy-vline 
WA_CVDDPBUF_STR-DELFLG sy-vline 
WA_CVDDPBUF_STR-PARKFLG sy-vline 
WA_CVDDPBUF_STR-CRDAT sy-vline 
WA_CVDDPBUF_STR-CRNAM sy-vline 
WA_CVDDPBUF_STR-UPDDAT sy-vline 
WA_CVDDPBUF_STR-UPDNAM sy-vline 
WA_CVDDPBUF_STR-SRSID sy-vline 
WA_CVDDPBUF_STR-OWNID sy-vline 
WA_CVDDPBUF_STR-RECNROOT sy-vline 
WA_CVDDPBUF_STR-OBJECT sy-vline 
WA_CVDDPBUF_STR-ATTRIB sy-vline 
WA_CVDDPBUF_STR-ORD sy-vline 
WA_CVDDPBUF_STR-VALUETYPE sy-vline 
WA_CVDDPBUF_STR-VALUE sy-vline 
WA_CVDDPBUF_STR-TDOBJECT sy-vline 
WA_CVDDPBUF_STR-TDID sy-vline 
WA_CVDDPBUF_STR-TDNAME sy-vline 
WA_CVDDPBUF_STR-TDSPRAS sy-vline 
WA_CVDDPBUF_STR-REPPARAFLG sy-vline 
WA_CVDDPBUF_STR-VALUECHFLG sy-vline 
WA_CVDDPBUF_STR-DEFPARAFLG sy-vline 
WA_CVDDPBUF_STR-APPLOBJKEYFLG sy-vline 
WA_CVDDPBUF_STR-LSYFKPA sy-vline 
WA_CVDDPBUF_STR-REQUIREDFLG sy-vline 
WA_CVDDPBUF_STR-SHOWONLYFLG sy-vline 
WA_CVDDPBUF_STR-DOKAR sy-vline 
WA_CVDDPBUF_STR-DOKNR sy-vline 
WA_CVDDPBUF_STR-DOKVR sy-vline 
WA_CVDDPBUF_STR-DOKTL sy-vline 
WA_CVDDPBUF_STR-PARHIER sy-vline 
WA_CVDDPBUF_STR-PAROBJ sy-vline 
WA_CVDDPBUF_STR-PAROBJKEY sy-vline 
WA_CVDDPBUF_STR-PAROBJPAR sy-vline 
WA_CVDDPBUF_STR-PAROBJPARKEY sy-vline 
WA_CVDDPBUF_STR-LENRECD sy-vline 
WA_CVDDPBUF_STR-FILEP sy-vline 
WA_CVDDPBUF_STR-LANGU sy-vline 
WA_CVDDPBUF_STR-RVLID sy-vline 
WA_CVDDPBUF_STR-SORT sy-vline      INTO ld_text SEPARATED BY SPACE.

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