ABAP Select data from SAP table /PTGWFI/IEM_DCVW into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /PTGWFI/IEM_DCVW 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 /PTGWFI/IEM_DCVW. 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 /PTGWFI/IEM_DCVW 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_/PTGWFI/IEM_DCVW TYPE STANDARD TABLE OF /PTGWFI/IEM_DCVW,
      WA_/PTGWFI/IEM_DCVW TYPE /PTGWFI/IEM_DCVW,
      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: </PTGWFI/IEM_DCVW> TYPE /PTGWFI/IEM_DCVW.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /PTGWFI/IEM_DCVW
  INTO TABLE IT_/PTGWFI/IEM_DCVW.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /PTGWFI/IEM_DCVW
*  INTO TABLE @DATA(IT_/PTGWFI/IEM_DCVW2).
*--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_/PTGWFI/IEM_DCVW INDEX 1 INTO DATA(WA_/PTGWFI/IEM_DCVW2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/PTGWFI/IEM_DCVW ASSIGNING </PTGWFI/IEM_DCVW>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</PTGWFI/IEM_DCVW>-MANDT = 1.
</PTGWFI/IEM_DCVW>-BELNR = 1.
</PTGWFI/IEM_DCVW>-GJAHR = 1.
</PTGWFI/IEM_DCVW>-BUKRS = 1.
</PTGWFI/IEM_DCVW>-BUZEI = 1.

ENDLOOP.

LOOP AT IT_/PTGWFI/IEM_DCVW INTO WA_/PTGWFI/IEM_DCVW.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/PTGWFI/IEM_DCVW-LINES, sy-vline,
  WA_/PTGWFI/IEM_DCVW-ERNAM, sy-vline,
  WA_/PTGWFI/IEM_DCVW-ERTIM, sy-vline,
  WA_/PTGWFI/IEM_DCVW-ERDAT, sy-vline,
  WA_/PTGWFI/IEM_DCVW-LIFNR, sy-vline,
  WA_/PTGWFI/IEM_DCVW-INVSTAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/PTGWFI/IEM_DCVW 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_/PTGWFI/IEM_DCVW 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_/PTGWFI/IEM_DCVW INTO WA_/PTGWFI/IEM_DCVW.


*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 BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/PTGWFI/IEM_DCVW-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PTGWFI/IEM_DCVW-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_/PTGWFI/IEM_DCVW-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PTGWFI/IEM_DCVW-GJAHR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/PTGWFI/IEM_DCVW-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PTGWFI/IEM_DCVW-EBELN.
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_/PTGWFI/IEM_DCVW_STR, 
MANDT TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BUKRS TYPE STRING,
BUZEI TYPE STRING,
LINES TYPE STRING,
ERNAM TYPE STRING,
ERTIM TYPE STRING,
ERDAT TYPE STRING,
LIFNR TYPE STRING,
INVSTAT TYPE STRING,
LINSTAT TYPE STRING,
RSNTXT TYPE STRING,
AMOUNTLN TYPE STRING,
AMOUNTHDR TYPE STRING,
WAERS TYPE STRING,
AMTLN_LC TYPE STRING,
AMTHDR_LC TYPE STRING,
LWAERS TYPE STRING,
BLDAT TYPE STRING,
EXCDATE TYPE STRING,
DUEDAT TYPE STRING,
BUDAT TYPE STRING,
BAL_DAYS TYPE STRING,
OVERDUE TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
VDNAME TYPE STRING,
WERKS TYPE STRING,
XBLNR TYPE STRING,
CAT_INV TYPE STRING,
TYPE TYPE STRING,
STATUS TYPE STRING,
BLKRSN TYPE STRING,
PRKRSN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/PTGWFI/IEM_DCVW_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_/PTGWFI/IEM_DCVW_STR-MANDT sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-BELNR sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-GJAHR sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-BUKRS sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-BUZEI sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-LINES sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-ERNAM sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-ERTIM sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-ERDAT sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-LIFNR sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-INVSTAT sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-LINSTAT sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-RSNTXT sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-AMOUNTLN sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-AMOUNTHDR sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-WAERS sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-AMTLN_LC sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-AMTHDR_LC sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-LWAERS sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-BLDAT sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-EXCDATE sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-DUEDAT sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-BUDAT sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-BAL_DAYS sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-OVERDUE sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-EBELN sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-EBELP sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-VDNAME sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-WERKS sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-XBLNR sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-CAT_INV sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-TYPE sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-STATUS sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-BLKRSN sy-vline 
WA_/PTGWFI/IEM_DCVW_STR-PRKRSN sy-vline      INTO ld_text SEPARATED BY SPACE.

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