ABAP Select data from SAP table CNV_PE_S4_AFS_S_CABN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CNV_PE_S4_AFS_S_CABN 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 CNV_PE_S4_AFS_S_CABN. 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 CNV_PE_S4_AFS_S_CABN 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_CNV_PE_S4_AFS_S_CABN TYPE STANDARD TABLE OF CNV_PE_S4_AFS_S_CABN,
      WA_CNV_PE_S4_AFS_S_CABN TYPE CNV_PE_S4_AFS_S_CABN,
      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: <CNV_PE_S4_AFS_S_CABN> TYPE CNV_PE_S4_AFS_S_CABN.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CNV_PE_S4_AFS_S_CABN.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CNV_PE_S4_AFS_S_CABN
  INTO TABLE IT_CNV_PE_S4_AFS_S_CABN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNV_PE_S4_AFS_S_CABN
*  INTO TABLE @DATA(IT_CNV_PE_S4_AFS_S_CABN2).
*--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_CNV_PE_S4_AFS_S_CABN INDEX 1 INTO DATA(WA_CNV_PE_S4_AFS_S_CABN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CNV_PE_S4_AFS_S_CABN ASSIGNING <CNV_PE_S4_AFS_S_CABN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNV_PE_S4_AFS_S_CABN>-AENNR = 1.
<CNV_PE_S4_AFS_S_CABN>-DATUV = 1.
<CNV_PE_S4_AFS_S_CABN>-ADATU = 1.
<CNV_PE_S4_AFS_S_CABN>-DATUB = 1.
<CNV_PE_S4_AFS_S_CABN>-ATFOR = 1.

ENDLOOP.

LOOP AT IT_CNV_PE_S4_AFS_S_CABN INTO WA_CNV_PE_S4_AFS_S_CABN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNV_PE_S4_AFS_S_CABN-ANZST, sy-vline,
  WA_CNV_PE_S4_AFS_S_CABN-ANZDZ, sy-vline,
  WA_CNV_PE_S4_AFS_S_CABN-ATKLE, sy-vline,
  WA_CNV_PE_S4_AFS_S_CABN-ATDEX, sy-vline,
  WA_CNV_PE_S4_AFS_S_CABN-ATDIM, sy-vline,
  WA_CNV_PE_S4_AFS_S_CABN-ATEND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNV_PE_S4_AFS_S_CABN 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_CNV_PE_S4_AFS_S_CABN 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_CNV_PE_S4_AFS_S_CABN INTO WA_CNV_PE_S4_AFS_S_CABN.


*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 AENNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNV_PE_S4_AFS_S_CABN-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNV_PE_S4_AFS_S_CABN-AENNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MSEHI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CNV_PE_S4_AFS_S_CABN-MSEHI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNV_PE_S4_AFS_S_CABN-MSEHI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNV_PE_S4_AFS_S_CABN-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNV_PE_S4_AFS_S_CABN-DOKNR.
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_CNV_PE_S4_AFS_S_CABN_STR, 
AENNR TYPE STRING,
DATUV TYPE STRING,
ADATU TYPE STRING,
DATUB TYPE STRING,
ATFOR TYPE STRING,
ANZST TYPE STRING,
ANZDZ TYPE STRING,
ATKLE TYPE STRING,
ATDEX TYPE STRING,
ATDIM TYPE STRING,
ATEND TYPE STRING,
MSEHI TYPE STRING,
ATMST TYPE STRING,
ATKLA TYPE STRING,
ATEIN TYPE STRING,
ATGLA TYPE STRING,
ATINP TYPE STRING,
ATVIE TYPE STRING,
ATERF TYPE STRING,
ATINT TYPE STRING,
ATVSC TYPE STRING,
ATWRD TYPE STRING,
ATSON TYPE STRING,
DOKNR TYPE STRING,
DOKAR TYPE STRING,
DOKTL TYPE STRING,
DOKVR TYPE STRING,
ATPRT TYPE STRING,
ATPRF TYPE STRING,
WERKS TYPE STRING,
AUSWAHLMGE TYPE STRING,
ATAEN TYPE STRING,
ATUNS TYPE STRING,
ATAUTH TYPE STRING,
ATFOD TYPE STRING,
ATSCH TYPE STRING,
LKENZ TYPE STRING,
ATTAB TYPE STRING,
ATFEL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNV_PE_S4_AFS_S_CABN_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_CNV_PE_S4_AFS_S_CABN_STR-AENNR sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-DATUV sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ADATU sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-DATUB sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ATFOR sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ANZST sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ANZDZ sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ATKLE sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ATDEX sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ATDIM sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ATEND sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-MSEHI sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ATMST sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ATKLA sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ATEIN sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ATGLA sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ATINP sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ATVIE sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ATERF sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ATINT sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ATVSC sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ATWRD sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ATSON sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-DOKNR sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-DOKAR sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-DOKTL sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-DOKVR sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ATPRT sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ATPRF sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-WERKS sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-AUSWAHLMGE sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ATAEN sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ATUNS sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ATAUTH sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ATFOD sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ATSCH sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-LKENZ sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ATTAB sy-vline 
WA_CNV_PE_S4_AFS_S_CABN_STR-ATFEL sy-vline      INTO ld_text SEPARATED BY SPACE.

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