ABAP Select data from SAP table /SEHS/DGS_PRTAPI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SEHS/DGS_PRTAPI
*  INTO TABLE @DATA(IT_/SEHS/DGS_PRTAPI2).
*--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_/SEHS/DGS_PRTAPI INDEX 1 INTO DATA(WA_/SEHS/DGS_PRTAPI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SEHS/DGS_PRTAPI>-DOCID = 1.
</SEHS/DGS_PRTAPI>-DOCNO = 1.
</SEHS/DGS_PRTAPI>-DOCCAT = 1.
</SEHS/DGS_PRTAPI>-DOCTYPE = 1.
</SEHS/DGS_PRTAPI>-ITEMID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SEHS/DGS_PRTAPI-ITEMNO, sy-vline,
  WA_/SEHS/DGS_PRTAPI-ITEMCAT, sy-vline,
  WA_/SEHS/DGS_PRTAPI-ITEMTYPE, sy-vline,
  WA_/SEHS/DGS_PRTAPI-MATNR, sy-vline,
  WA_/SEHS/DGS_PRTAPI-MATNR_EXT, sy-vline,
  WA_/SEHS/DGS_PRTAPI-LWDG_ORD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SEHS/DGS_PRTAPI 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_/SEHS/DGS_PRTAPI 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_/SEHS/DGS_PRTAPI INTO WA_/SEHS/DGS_PRTAPI.


*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 DOCNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SEHS/DGS_PRTAPI-DOCNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SEHS/DGS_PRTAPI-DOCNO.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit EHSMA, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_EHSMA_OUTPUT'
  EXPORTING
    input =                      WA_/SEHS/DGS_PRTAPI-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SEHS/DGS_PRTAPI-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_/SEHS/DGS_PRTAPI-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SEHS/DGS_PRTAPI-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_/SEHS/DGS_PRTAPI_STR, 
DOCID TYPE STRING,
DOCNO TYPE STRING,
DOCCAT TYPE STRING,
DOCTYPE TYPE STRING,
ITEMID TYPE STRING,
ITEMNO TYPE STRING,
ITEMCAT TYPE STRING,
ITEMTYPE TYPE STRING,
MATNR TYPE STRING,
MATNR_EXT TYPE STRING,
LWDG_ORD TYPE STRING,
LWDG TYPE STRING,
LANGU_ORD TYPE STRING,
LANGU TYPE STRING,
TDOBJ TYPE STRING,
TDNAME TYPE STRING,
TDID TYPE STRING,
TEXT_TAB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SEHS/DGS_PRTAPI_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_/SEHS/DGS_PRTAPI_STR-DOCID sy-vline 
WA_/SEHS/DGS_PRTAPI_STR-DOCNO sy-vline 
WA_/SEHS/DGS_PRTAPI_STR-DOCCAT sy-vline 
WA_/SEHS/DGS_PRTAPI_STR-DOCTYPE sy-vline 
WA_/SEHS/DGS_PRTAPI_STR-ITEMID sy-vline 
WA_/SEHS/DGS_PRTAPI_STR-ITEMNO sy-vline 
WA_/SEHS/DGS_PRTAPI_STR-ITEMCAT sy-vline 
WA_/SEHS/DGS_PRTAPI_STR-ITEMTYPE sy-vline 
WA_/SEHS/DGS_PRTAPI_STR-MATNR sy-vline 
WA_/SEHS/DGS_PRTAPI_STR-MATNR_EXT sy-vline 
WA_/SEHS/DGS_PRTAPI_STR-LWDG_ORD sy-vline 
WA_/SEHS/DGS_PRTAPI_STR-LWDG sy-vline 
WA_/SEHS/DGS_PRTAPI_STR-LANGU_ORD sy-vline 
WA_/SEHS/DGS_PRTAPI_STR-LANGU sy-vline 
WA_/SEHS/DGS_PRTAPI_STR-TDOBJ sy-vline 
WA_/SEHS/DGS_PRTAPI_STR-TDNAME sy-vline 
WA_/SEHS/DGS_PRTAPI_STR-TDID sy-vline 
WA_/SEHS/DGS_PRTAPI_STR-TEXT_TAB sy-vline      INTO ld_text SEPARATED BY SPACE.

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