ABAP Select data from SAP table /SEHS/DGS_REQDATA 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_REQDATA 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_REQDATA. 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_REQDATA 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_REQDATA TYPE STANDARD TABLE OF /SEHS/DGS_REQDATA,
      WA_/SEHS/DGS_REQDATA TYPE /SEHS/DGS_REQDATA,
      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_REQDATA> TYPE /SEHS/DGS_REQDATA.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SEHS/DGS_REQDATA
*  INTO TABLE @DATA(IT_/SEHS/DGS_REQDATA2).
*--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_REQDATA INDEX 1 INTO DATA(WA_/SEHS/DGS_REQDATA2).


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

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

ENDLOOP.

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

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


*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_REQDATA-DOCNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SEHS/DGS_REQDATA-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_REQDATA-ITEMNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SEHS/DGS_REQDATA-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_REQDATA-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SEHS/DGS_REQDATA-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_REQDATA-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SEHS/DGS_REQDATA-LANGU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit QTYRN, internal->external for field DG_ADR_PTS_VAL
CALL FUNCTION 'CONVERSION_EXIT_QTYRN_OUTPUT'
  EXPORTING
    input =                      WA_/SEHS/DGS_REQDATA-DG_ADR_PTS_VAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SEHS/DGS_REQDATA-DG_ADR_PTS_VAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field DG_ADR_PTS_UNI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SEHS/DGS_REQDATA-DG_ADR_PTS_UNI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SEHS/DGS_REQDATA-DG_ADR_PTS_UNI.
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_REQDATA_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,
DGRPROF TYPE STRING,
DGINDC TYPE STRING,
VALUE TYPE STRING,
TEXTCAT TYPE STRING,
TEXTPROF TYPE STRING,
TDOBJ TYPE STRING,
TDNAME TYPE STRING,
TDID TYPE STRING,
LANGU TYPE STRING,
SAP TYPE STRING,
DG_ADR_PTS_VAL TYPE STRING,
DG_ADR_PTS_UNI TYPE STRING,
FLG_MULRQ_FORBID TYPE STRING,
DUM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SEHS/DGS_REQDATA_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_REQDATA_STR-DOCID sy-vline 
WA_/SEHS/DGS_REQDATA_STR-DOCNO sy-vline 
WA_/SEHS/DGS_REQDATA_STR-DOCCAT sy-vline 
WA_/SEHS/DGS_REQDATA_STR-DOCTYPE sy-vline 
WA_/SEHS/DGS_REQDATA_STR-ITEMID sy-vline 
WA_/SEHS/DGS_REQDATA_STR-ITEMNO sy-vline 
WA_/SEHS/DGS_REQDATA_STR-ITEMCAT sy-vline 
WA_/SEHS/DGS_REQDATA_STR-ITEMTYPE sy-vline 
WA_/SEHS/DGS_REQDATA_STR-MATNR sy-vline 
WA_/SEHS/DGS_REQDATA_STR-MATNR_EXT sy-vline 
WA_/SEHS/DGS_REQDATA_STR-DGRPROF sy-vline 
WA_/SEHS/DGS_REQDATA_STR-DGINDC sy-vline 
WA_/SEHS/DGS_REQDATA_STR-VALUE sy-vline 
WA_/SEHS/DGS_REQDATA_STR-TEXTCAT sy-vline 
WA_/SEHS/DGS_REQDATA_STR-TEXTPROF sy-vline 
WA_/SEHS/DGS_REQDATA_STR-TDOBJ sy-vline 
WA_/SEHS/DGS_REQDATA_STR-TDNAME sy-vline 
WA_/SEHS/DGS_REQDATA_STR-TDID sy-vline 
WA_/SEHS/DGS_REQDATA_STR-LANGU sy-vline 
WA_/SEHS/DGS_REQDATA_STR-SAP sy-vline 
WA_/SEHS/DGS_REQDATA_STR-DG_ADR_PTS_VAL sy-vline 
WA_/SEHS/DGS_REQDATA_STR-DG_ADR_PTS_UNI sy-vline 
WA_/SEHS/DGS_REQDATA_STR-FLG_MULRQ_FORBID sy-vline 
WA_/SEHS/DGS_REQDATA_STR-DUM sy-vline      INTO ld_text SEPARATED BY SPACE.

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