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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SEHS/DGS_IREGSEQ
*  INTO TABLE @DATA(IT_/SEHS/DGS_IREGSEQ2).
*--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_IREGSEQ INDEX 1 INTO DATA(WA_/SEHS/DGS_IREGSEQ2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SEHS/DGS_IREGSEQ-ITEMNO, sy-vline,
  WA_/SEHS/DGS_IREGSEQ-ITEMCAT, sy-vline,
  WA_/SEHS/DGS_IREGSEQ-ITEMTYPE, sy-vline,
  WA_/SEHS/DGS_IREGSEQ-STAGESEQ, sy-vline,
  WA_/SEHS/DGS_IREGSEQ-COUNTRYSEQ, sy-vline,
  WA_/SEHS/DGS_IREGSEQ-COUNTRY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SEHS/DGS_IREGSEQ 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_IREGSEQ 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_IREGSEQ INTO WA_/SEHS/DGS_IREGSEQ.


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

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

*Conversion exit ALPHA, internal->external for field ACTN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SEHS/DGS_IREGSEQ-ACTN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SEHS/DGS_IREGSEQ-ACTN.
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_IREGSEQ_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,
STAGESEQ TYPE STRING,
COUNTRYSEQ TYPE STRING,
COUNTRY TYPE STRING,
REGION TYPE STRING,
MOT TYPE STRING,
RESOURCE_ID TYPE STRING,
MATNR TYPE STRING,
MATNR_EXT TYPE STRING,
LWDG TYPE STRING,
LWDG_ORD TYPE STRING,
RVLID TYPE STRING,
RECN TYPE STRING,
ACTN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SEHS/DGS_IREGSEQ_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_IREGSEQ_STR-DOCID sy-vline 
WA_/SEHS/DGS_IREGSEQ_STR-DOCNO sy-vline 
WA_/SEHS/DGS_IREGSEQ_STR-DOCCAT sy-vline 
WA_/SEHS/DGS_IREGSEQ_STR-DOCTYPE sy-vline 
WA_/SEHS/DGS_IREGSEQ_STR-ITEMID sy-vline 
WA_/SEHS/DGS_IREGSEQ_STR-ITEMNO sy-vline 
WA_/SEHS/DGS_IREGSEQ_STR-ITEMCAT sy-vline 
WA_/SEHS/DGS_IREGSEQ_STR-ITEMTYPE sy-vline 
WA_/SEHS/DGS_IREGSEQ_STR-STAGESEQ sy-vline 
WA_/SEHS/DGS_IREGSEQ_STR-COUNTRYSEQ sy-vline 
WA_/SEHS/DGS_IREGSEQ_STR-COUNTRY sy-vline 
WA_/SEHS/DGS_IREGSEQ_STR-REGION sy-vline 
WA_/SEHS/DGS_IREGSEQ_STR-MOT sy-vline 
WA_/SEHS/DGS_IREGSEQ_STR-RESOURCE_ID sy-vline 
WA_/SEHS/DGS_IREGSEQ_STR-MATNR sy-vline 
WA_/SEHS/DGS_IREGSEQ_STR-MATNR_EXT sy-vline 
WA_/SEHS/DGS_IREGSEQ_STR-LWDG sy-vline 
WA_/SEHS/DGS_IREGSEQ_STR-LWDG_ORD sy-vline 
WA_/SEHS/DGS_IREGSEQ_STR-RVLID sy-vline 
WA_/SEHS/DGS_IREGSEQ_STR-RECN sy-vline 
WA_/SEHS/DGS_IREGSEQ_STR-ACTN sy-vline      INTO ld_text SEPARATED BY SPACE.

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