ABAP Select data from SAP table EHDGMS_DOCUMENTINFO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EHDGMS_DOCUMENTINFO
*  INTO TABLE @DATA(IT_EHDGMS_DOCUMENTINFO2).
*--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_EHDGMS_DOCUMENTINFO INDEX 1 INTO DATA(WA_EHDGMS_DOCUMENTINFO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EHDGMS_DOCUMENTINFO>-MODEOFTRANSPORT = 1.
<EHDGMS_DOCUMENTINFO>-REGULATION = 1.
<EHDGMS_DOCUMENTINFO>-ISTRANSPORTFORBIDDEN = 1.
<EHDGMS_DOCUMENTINFO>-ISNOTADG = 1.
<EHDGMS_DOCUMENTINFO>-DESCRIPTION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EHDGMS_DOCUMENTINFO-PACKINGINSTRUCTION, sy-vline,
  WA_EHDGMS_DOCUMENTINFO-DANGEROUSGOODSPACKINGGROUP, sy-vline,
  WA_EHDGMS_DOCUMENTINFO-DANGEROUSGOODSIDNNUMBER, sy-vline,
  WA_EHDGMS_DOCUMENTINFO-DANGEROUSGOODSIDNNUMBERTYPE, sy-vline,
  WA_EHDGMS_DOCUMENTINFO-DANGEROUSGOODSCLASS, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_EHDGMS_DOCUMENTINFO 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_EHDGMS_DOCUMENTINFO 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_EHDGMS_DOCUMENTINFO INTO WA_EHDGMS_DOCUMENTINFO.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_EHDGMS_DOCUMENTINFO_STR, 
MODEOFTRANSPORT TYPE STRING,
REGULATION TYPE STRING,
ISTRANSPORTFORBIDDEN TYPE STRING,
ISNOTADG TYPE STRING,
DESCRIPTION TYPE STRING,
PACKINGINSTRUCTION TYPE STRING,
DANGEROUSGOODSPACKINGGROUP TYPE STRING,
DANGEROUSGOODSIDNNUMBER TYPE STRING,
DANGEROUSGOODSIDNNUMBERTYPE TYPE STRING,
DANGEROUSGOODSCLASS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EHDGMS_DOCUMENTINFO_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_EHDGMS_DOCUMENTINFO_STR-MODEOFTRANSPORT sy-vline 
WA_EHDGMS_DOCUMENTINFO_STR-REGULATION sy-vline 
WA_EHDGMS_DOCUMENTINFO_STR-ISTRANSPORTFORBIDDEN sy-vline 
WA_EHDGMS_DOCUMENTINFO_STR-ISNOTADG sy-vline 
WA_EHDGMS_DOCUMENTINFO_STR-DESCRIPTION sy-vline 
WA_EHDGMS_DOCUMENTINFO_STR-PACKINGINSTRUCTION sy-vline 
WA_EHDGMS_DOCUMENTINFO_STR-DANGEROUSGOODSPACKINGGROUP sy-vline 
WA_EHDGMS_DOCUMENTINFO_STR-DANGEROUSGOODSIDNNUMBER sy-vline 
WA_EHDGMS_DOCUMENTINFO_STR-DANGEROUSGOODSIDNNUMBERTYPE sy-vline 
WA_EHDGMS_DOCUMENTINFO_STR-DANGEROUSGOODSCLASS sy-vline      INTO ld_text SEPARATED BY SPACE.

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